一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

无

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-22.03-LTS-SP4:

10.openEuler-24.03-LTS:

11.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-22.03-LTS-SP4:

10.openEuler-24.03-LTS:

11.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| cve_search | | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed |

| cve_search | | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d |

| cve_search | | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

无

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-22.03-LTS-SP4:

10.openEuler-24.03-LTS:

11.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-22.03-LTS-SP4:

10.openEuler-24.03-LTS:

11.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-22.03-LTS-SP4:

10.openEuler-24.03-LTS:

11.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

受影响版本排查(受影响/不受影响)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-22.03-LTS-SP4:

10.openEuler-24.03-LTS:

11.openEuler-24.03-LTS-Next:

修复是否涉及abi变化(是/否)：

1.master(6.1.0):

2.openEuler-20.03-LTS-SP1(4.19.90):

3.openEuler-20.03-LTS-SP4(4.19.90):

4.openEuler-22.03-LTS(5.10.0):

5.openEuler-22.03-LTS-Next(5.10.0):

6.openEuler-22.03-LTS-SP1(5.10.0):

7.openEuler-22.03-LTS-SP2(5.10.0):

8.openEuler-22.03-LTS-SP3(5.10.0):

9.openEuler-22.03-LTS-SP4:

10.openEuler-24.03-LTS:

11.openEuler-24.03-LTS-Next:

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

| cve_search | | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed |

| cve_search | | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d |

| cve_search | | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba |

| ubuntu | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba (5.15) | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

修复是否涉及abi变化(是/否)：

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

openEuler评分：

5.5

Vector：CVSS：3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响)：

1.openEuler-22.03-LTS(5.10.0):受影响

2.openEuler-22.03-LTS-SP1(5.10.0):受影响

3.openEuler-22.03-LTS-SP2(5.10.0):受影响

4.openEuler-22.03-LTS-SP3(5.10.0):受影响

5.openEuler-20.03-LTS-SP1(4.19.90):不受影响

6.openEuler-20.03-LTS-SP4(4.19.90):不受影响

7.master(6.1.0):不受影响

8.openEuler-22.03-LTS-Next(5.10.0):不受影响

9.openEuler-24.03-LTS:不受影响

10.openEuler-24.03-LTS-Next:不受影响

修复是否涉及abi变化(是/否)：

1.openEuler-20.03-LTS-SP1(4.19.90):否

2.openEuler-20.03-LTS-SP4(4.19.90):否

3.openEuler-22.03-LTS(5.10.0):否

4.openEuler-22.03-LTS-SP1(5.10.0):否

5.openEuler-22.03-LTS-SP2(5.10.0):否

6.openEuler-22.03-LTS-SP3(5.10.0):否

7.master(6.1.0):否

8.openEuler-22.03-LTS-Next(5.10.0):否

9.openEuler-24.03-LTS:否

10.openEuler-24.03-LTS-Next:否

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

| ubuntu | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba (5.15) | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| cve_search | | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed |

| cve_search | | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d |

| cve_search | | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

openEuler评分：

5.5

Vector：CVSS：3.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响)：

7.master(6.1.0):不受影响

8.openEuler-22.03-LTS-Next(5.10.0):不受影响

9.openEuler-24.03-LTS:不受影响

10.openEuler-24.03-LTS-Next:不受影响

修复是否涉及abi变化(是/否)：

1.openEuler-20.03-LTS-SP1(4.19.90):否

2.openEuler-20.03-LTS-SP4(4.19.90):否

3.openEuler-22.03-LTS(5.10.0):否

4.openEuler-22.03-LTS-SP1(5.10.0):否

5.openEuler-22.03-LTS-SP2(5.10.0):否

6.openEuler-22.03-LTS-SP3(5.10.0):否

7.master(6.1.0):否

8.openEuler-22.03-LTS-Next(5.10.0):否

9.openEuler-24.03-LTS:否

10.openEuler-24.03-LTS-Next:否

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

5.5

受影响版本排查(受影响/不受影响)：

1.openEuler-22.03-LTS-SP1(5.10.0):受影响

2.openEuler-22.03-LTS-SP3(5.10.0):受影响

3.openEuler-20.03-LTS-SP1(4.19.90):不受影响

4.openEuler-20.03-LTS-SP4(4.19.90):不受影响

5.openEuler-22.03-LTS(5.10.0):不受影响

6.openEuler-22.03-LTS-SP2(5.10.0):不受影响

7.master(6.1.0):不受影响

8.openEuler-22.03-LTS-Next(5.10.0):不受影响

9.openEuler-24.03-LTS:不受影响

10.openEuler-24.03-LTS-Next:不受影响

修复是否涉及abi变化(是/否)：

1.openEuler-20.03-LTS-SP1(4.19.90):否

2.openEuler-20.03-LTS-SP4(4.19.90):否

3.openEuler-22.03-LTS(5.10.0):否

4.openEuler-22.03-LTS-SP1(5.10.0):否

5.openEuler-22.03-LTS-SP2(5.10.0):否

6.openEuler-22.03-LTS-SP3(5.10.0):否

7.master(6.1.0):否

8.openEuler-22.03-LTS-Next(5.10.0):否

9.openEuler-24.03-LTS:否

10.openEuler-24.03-LTS-Next:否

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

5.5

Vector：CVSS：2.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响)：

1.openEuler-22.03-LTS-SP1(5.10.0):受影响

2.openEuler-22.03-LTS-SP3(5.10.0):受影响

3.openEuler-20.03-LTS-SP1(4.19.90):不受影响

4.openEuler-20.03-LTS-SP4(4.19.90):不受影响

5.openEuler-22.03-LTS(5.10.0):不受影响

6.openEuler-22.03-LTS-SP2(5.10.0):不受影响

7.master(6.1.0):不受影响

8.openEuler-22.03-LTS-Next(5.10.0):不受影响

9.openEuler-24.03-LTS:不受影响

10.openEuler-24.03-LTS-Next:不受影响

修复是否涉及abi变化(是/否)：

1.openEuler-20.03-LTS-SP1(4.19.90):否

2.openEuler-20.03-LTS-SP4(4.19.90):否

3.openEuler-22.03-LTS(5.10.0):否

4.openEuler-22.03-LTS-SP1(5.10.0):否

5.openEuler-22.03-LTS-SP2(5.10.0):否

6.openEuler-22.03-LTS-SP3(5.10.0):否

7.master(6.1.0):否

8.openEuler-22.03-LTS-Next(5.10.0):否

9.openEuler-24.03-LTS:否

10.openEuler-24.03-LTS-Next:否

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

5.5

Vector：CVSS：2.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响)：

1.openEuler-22.03-LTS-SP1(5.10.0):受影响

2.openEuler-22.03-LTS-SP3(5.10.0):受影响

3.openEuler-20.03-LTS-SP1(4.19.90):不受影响

4.openEuler-20.03-LTS-SP4(4.19.90):不受影响

5.openEuler-22.03-LTS(5.10.0):不受影响

6.openEuler-22.03-LTS-SP2(5.10.0):不受影响

7.master(6.1.0):不受影响

8.openEuler-22.03-LTS-Next(5.10.0):不受影响

修复是否涉及abi变化(是/否)：

1.openEuler-20.03-LTS-SP1(4.19.90):否

2.openEuler-20.03-LTS-SP4(4.19.90):否

3.openEuler-22.03-LTS(5.10.0):否

4.openEuler-22.03-LTS-SP1(5.10.0):否

5.openEuler-22.03-LTS-SP2(5.10.0):否

6.openEuler-22.03-LTS-SP3(5.10.0):否

7.master(6.1.0):否

8.openEuler-22.03-LTS-Next(5.10.0):否

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

5.5

Vector：CVSS：2.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响)：

1.openEuler-22.03-LTS-SP1(5.10.0):受影响

3.openEuler-20.03-LTS-SP1(4.19.90):不受影响

5.openEuler-22.03-LTS(5.10.0):不受影响

6.openEuler-22.03-LTS-SP2(5.10.0):不受影响

7.master(6.1.0):不受影响

8.openEuler-22.03-LTS-Next(5.10.0):不受影响

9.openEuler-24.03-LTS(6.6.0):不受影响

10.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：

1.openEuler-20.03-LTS-SP1(4.19.90):否

3.openEuler-22.03-LTS(5.10.0):否

4.openEuler-22.03-LTS-SP1(5.10.0):否

5.openEuler-22.03-LTS-SP2(5.10.0):否

7.master(6.1.0):否

8.openEuler-22.03-LTS-Next(5.10.0):否

9.openEuler-24.03-LTS(6.6.0):否

10.openEuler-24.03-LTS-Next(6.6.0):否

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

| ubuntu | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba (5.15) | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| cve_search | | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed |

| cve_search | | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d |

| cve_search | | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

5.5

Vector：CVSS：2.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响)：

1.openEuler-22.03-LTS-SP1(5.10.0):受影响

3.openEuler-20.03-LTS-SP1(4.19.90):不受影响

5.openEuler-22.03-LTS(5.10.0):不受影响

6.openEuler-22.03-LTS-SP2(5.10.0):不受影响

7.master(6.1.0):不受影响

8.openEuler-22.03-LTS-Next(5.10.0):不受影响

9.openEuler-24.03-LTS(6.6.0):不受影响

10.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：

1.openEuler-20.03-LTS-SP1(4.19.90):否

3.openEuler-22.03-LTS(5.10.0):否

4.openEuler-22.03-LTS-SP1(5.10.0):否

5.openEuler-22.03-LTS-SP2(5.10.0):否

7.master(6.1.0):否

8.openEuler-22.03-LTS-Next(5.10.0):否

9.openEuler-24.03-LTS(6.6.0):否

10.openEuler-24.03-LTS-Next(6.6.0):否

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

5.5

Vector：CVSS：2.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响)：

1.openEuler-22.03-LTS-SP1(5.10.0):受影响

2.openEuler-22.03-LTS-SP3(5.10.0):受影响

3.openEuler-20.03-LTS-SP1(4.19.90):不受影响

4.openEuler-20.03-LTS-SP4(4.19.90):不受影响

5.openEuler-22.03-LTS(5.10.0):不受影响

6.openEuler-22.03-LTS-SP2(5.10.0):不受影响

7.master(6.1.0):不受影响

8.openEuler-22.03-LTS-Next(5.10.0):不受影响

9.openEuler-24.03-LTS(6.6.0):不受影响

10.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：

1.openEuler-20.03-LTS-SP1(4.19.90):否

2.openEuler-20.03-LTS-SP4(4.19.90):否

3.openEuler-22.03-LTS(5.10.0):否

4.openEuler-22.03-LTS-SP1(5.10.0):否

5.openEuler-22.03-LTS-SP2(5.10.0):否

6.openEuler-22.03-LTS-SP3(5.10.0):否

7.master(6.1.0):否

8.openEuler-22.03-LTS-Next(5.10.0):否

9.openEuler-24.03-LTS(6.6.0):否

10.openEuler-24.03-LTS-Next(6.6.0):否

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

| cve_search | | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed |

| cve_search | | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d |

| cve_search | | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba |

| ubuntu | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba (5.15) | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

5.5

Vector：CVSS：2.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响)：

1.openEuler-22.03-LTS-SP1(5.10.0):受影响

2.openEuler-22.03-LTS-SP3(5.10.0):受影响

3.openEuler-20.03-LTS-SP1(4.19.90):不受影响

4.openEuler-20.03-LTS-SP4(4.19.90):不受影响

5.openEuler-22.03-LTS(5.10.0):不受影响

6.openEuler-22.03-LTS-SP2(5.10.0):不受影响

7.master(6.1.0):不受影响

8.openEuler-22.03-LTS-Next(5.10.0):不受影响

9.openEuler-24.03-LTS(6.6.0):不受影响

10.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：

1.openEuler-20.03-LTS-SP1(4.19.90):否

2.openEuler-20.03-LTS-SP4(4.19.90):否

3.openEuler-22.03-LTS(5.10.0):否

4.openEuler-22.03-LTS-SP1(5.10.0):否

5.openEuler-22.03-LTS-SP2(5.10.0):否

6.openEuler-22.03-LTS-SP3(5.10.0):否

7.master(6.1.0):否

8.openEuler-22.03-LTS-Next(5.10.0):否

9.openEuler-24.03-LTS(6.6.0):否

10.openEuler-24.03-LTS-Next(6.6.0):否

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

5.5

Vector：CVSS：2.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响)：

1.openEuler-22.03-LTS-SP1(5.10.0):受影响

3.openEuler-20.03-LTS-SP1(4.19.90):不受影响

5.openEuler-22.03-LTS(5.10.0):不受影响

6.openEuler-22.03-LTS-SP2(5.10.0):不受影响

7.master(6.1.0):不受影响

8.openEuler-22.03-LTS-Next(5.10.0):不受影响

9.openEuler-24.03-LTS(6.6.0):不受影响

10.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：

1.openEuler-20.03-LTS-SP1(4.19.90):否

3.openEuler-22.03-LTS(5.10.0):否

4.openEuler-22.03-LTS-SP1(5.10.0):否

5.openEuler-22.03-LTS-SP2(5.10.0):否

7.master(6.1.0):否

8.openEuler-22.03-LTS-Next(5.10.0):否

9.openEuler-24.03-LTS(6.6.0):否

10.openEuler-24.03-LTS-Next(6.6.0):否

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

| ubuntu | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba (5.15) | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| cve_search | | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed |

| cve_search | | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d |

| cve_search | | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

5.5

Vector：CVSS：2.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响)：

1.openEuler-22.03-LTS-SP1(5.10.0):受影响

3.openEuler-20.03-LTS-SP1(4.19.90):不受影响

5.openEuler-22.03-LTS(5.10.0):不受影响

6.openEuler-22.03-LTS-SP2(5.10.0):不受影响

7.master(6.1.0):不受影响

8.openEuler-22.03-LTS-Next(5.10.0):不受影响

9.openEuler-24.03-LTS(6.6.0):不受影响

10.openEuler-24.03-LTS-Next(6.6.0):不受影响

修复是否涉及abi变化(是/否)：

1.openEuler-20.03-LTS-SP1(4.19.90):否

3.openEuler-22.03-LTS(5.10.0):否

4.openEuler-22.03-LTS-SP1(5.10.0):否

5.openEuler-22.03-LTS-SP2(5.10.0):否

7.master(6.1.0):否

8.openEuler-22.03-LTS-Next(5.10.0):否

9.openEuler-24.03-LTS(6.6.0):否

10.openEuler-24.03-LTS-Next(6.6.0):否

一、漏洞信息

漏洞编号：[CVE-2021-47488](https://nvd.nist.gov/vuln/detail/CVE-2021-47488)

漏洞归属组件：[kernel](https://gitee.com/src-openeuler/kernel)

漏洞归属的版本：4.19.140,4.19.194,4.19.90,5.10.0,6.1.0,6.1.14,6.1.19,6.1.5,6.1.6,6.1.8,6.4.0,6.6.0

CVSS V2.0分值：

BaseScore：0.0 Low

Vector：CVSS：2.0/

漏洞简述：

In the Linux kernel, the following vulnerability has been resolved:cgroup: Fix memory leak caused by missing cgroup_bpf_offlineWhen enabling CONFIG_CGROUP_BPF, kmemleak can be observed by runningthe command as below: $mount -t cgroup -o none,name=foo cgroup cgroup/ $umount cgroup/unreferenced object 0xc3585c40 (size 64): comm mount , pid 425, jiffies 4294959825 (age 31.990s) hex dump (first 32 bytes): 01 00 00 80 84 8c 28 c0 00 00 00 00 00 00 00 00 ......(......... 00 00 00 00 00 00 00 00 6c 43 a0 c3 00 00 00 00 ........lC...... backtrace: [<e95a2f9e>] cgroup_bpf_inherit+0x44/0x24c [<1f03679c>] cgroup_setup_root+0x174/0x37c [<ed4b0ac5>] cgroup1_get_tree+0x2c0/0x4a0 [<f85b12fd>] vfs_get_tree+0x24/0x108 [<f55aec5c>] path_mount+0x384/0x988 [<e2d5e9cd>] do_mount+0x64/0x9c [<208c9cfe>] sys_mount+0xfc/0x1f4 [<06dd06e0>] ret_fast_syscall+0x0/0x48 [<a8308cb3>] 0xbeb4daa8This is because that since the commit 2b0d3d3e4fcf ( percpu_ref: reducememory footprint of percpu_ref in fast path ) root_cgrp->bpf.refcnt.datais allocated by the function percpu_ref_init in cgroup_bpf_inherit whichis called by cgroup_setup_root when mounting, but not freed along withroot_cgrp when umounting. Adding cgroup_bpf_offline which callspercpu_ref_kill to cgroup_kill_sb can free root_cgrp->bpf.refcnt.data inumount path.This patch also fixes the commit 4bfc0bb2c60e ( bpf: decouple the lifetimeof cgroup_bpf from cgroup itself ). A cgroup_bpf_offline is needed to do acleanup that frees the resources which are allocated by cgroup_bpf_inheritin cgroup_setup_root.And inside cgroup_bpf_offline, cgroup_get() is at the beginning andcgroup_put is at the end of cgroup_bpf_release which is called bycgroup_bpf_offline. So cgroup_bpf_offline can keep the balance ofcgroup s refcount.

漏洞公开时间：2024-05-22 17:15:10

漏洞创建时间：2024-05-22 17:32:42

漏洞详情参考链接：

https://nvd.nist.gov/vuln/detail/CVE-2021-47488

<details>

<summary>更多参考(点击展开)</summary>

| 参考来源 | 参考链接 | 来源链接 |

| ------- | -------- | -------- |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | |

| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | |

| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| suse_bugzilla | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://bugzilla.suse.com/show_bug.cgi?id=1224902 |

| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024052240-CVE-2021-47488-9c35@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2282929 |

| ubuntu | https://www.cve.org/CVERecord?id=CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba (5.15) | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://nvd.nist.gov/vuln/detail/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://launchpad.net/bugs/cve/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| ubuntu | https://security-tracker.debian.org/tracker/CVE-2021-47488 | https://ubuntu.com/security/CVE-2021-47488 |

| cve_search | | https://git.kernel.org/stable/c/01599bf7cc2b49c3d2be886cb438647dc25446ed |

| cve_search | | https://git.kernel.org/stable/c/b529f88d93884cf8ccafda793ee3d27b82fa578d |

| cve_search | | https://git.kernel.org/stable/c/04f8ef5643bcd8bcde25dfdebef998aea480b2ba |

</details>

漏洞分析指导链接：

https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md

漏洞数据来源:

openBrain开源漏洞感知系统

漏洞补丁信息：

<details>

<summary>详情(点击展开)</summary>

| 影响的包 | 修复版本 | 修复补丁 | 问题引入补丁 | 来源 |

| ------- | -------- | ------- | -------- | --------- |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/2b0d3d3e4fcfb19d10f9a82910b8f0f05c56ee3e | ubuntu |

| linux | | https://git.kernel.org/linus/04f8ef5643bcd8bcde25dfdebef998aea480b2ba | https://git.kernel.org/linus/4bfc0bb2c60e2f4cc8eb60f03cf8dfa72336272a | ubuntu |

</details>

二、漏洞分析结构反馈

影响性分析说明：

openEuler评分：

5.5

Vector：CVSS：2.0/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N

受影响版本排查(受影响/不受影响)：

1.openEuler-22.03-LTS-SP1(5.10.0):受影响

2.openEuler-22.03-LTS-SP3(5.10.0):受影响

3.openEuler-20.03-LTS-SP1(4.19.90):不受影响

4.openEuler-20.03-LTS-SP4(4.19.90):不受影响

5.openEuler-22.03-LTS(5.10.0):不受影响

6.openEuler-22.03-LTS-SP2(5.10.0):不受影响