============================================
WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7
RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419
Call Trace:
<TASK>
ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_block_super+0x44/0x90 fs/super.c:1675
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327
[...]

一、漏洞信息
漏洞编号：CVE-2024-39276
漏洞归属组件：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 None
Vector：CVSS：2.0/
漏洞简述：
In the Linux kernel, the following vulnerability has been resolved:ext4: fix mb_cache_entry s e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce s e_refcnt, which has already grownin the __entry_find(), won t be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.
漏洞公开时间：2024-06-25 23:15:13
漏洞创建时间：2024-06-26 00:04:20
漏洞详情参考链接：
https://nvd.nist.gov/vuln/detail/CVE-2024-39276

更多参考(点击展开)

参考来源	参考链接	来源链接
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0c0b4a49d3e7f49690a6827a41faeffad5df7e21
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/681ff9a09accd8a4379f8bd30b7a1641ee19bb3e
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/76dc776153a47372719d664e0fc50d6355791abb
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/896a7e7d0d555ad8b2b46af0c2fa7de7467f9483
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9ad75e78747b5a50dc5a52f0f8e92e920a653f16
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a95df6f04f2c37291adf26a74205cde0314d4577
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/b37c0edef4e66fb21a2fbc211471195a383e5ab8
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e941b712e758f615d311946bf98216e79145ccd9
suse_bugzilla	http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-39276	https://bugzilla.suse.com/show_bug.cgi?id=1226993
suse_bugzilla	https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-39276.mbox	https://bugzilla.suse.com/show_bug.cgi?id=1226993
suse_bugzilla	https://git.kernel.org/stable/c/9ad75e78747b5a50dc5a52f0f8e92e920a653f16	https://bugzilla.suse.com/show_bug.cgi?id=1226993
suse_bugzilla	https://git.kernel.org/stable/c/896a7e7d0d555ad8b2b46af0c2fa7de7467f9483	https://bugzilla.suse.com/show_bug.cgi?id=1226993
suse_bugzilla	https://git.kernel.org/stable/c/76dc776153a47372719d664e0fc50d6355791abb	https://bugzilla.suse.com/show_bug.cgi?id=1226993
suse_bugzilla	https://git.kernel.org/stable/c/681ff9a09accd8a4379f8bd30b7a1641ee19bb3e	https://bugzilla.suse.com/show_bug.cgi?id=1226993
suse_bugzilla	https://git.kernel.org/stable/c/e941b712e758f615d311946bf98216e79145ccd9	https://bugzilla.suse.com/show_bug.cgi?id=1226993
suse_bugzilla	https://git.kernel.org/stable/c/a95df6f04f2c37291adf26a74205cde0314d4577	https://bugzilla.suse.com/show_bug.cgi?id=1226993
suse_bugzilla	https://git.kernel.org/stable/c/b37c0edef4e66fb21a2fbc211471195a383e5ab8	https://bugzilla.suse.com/show_bug.cgi?id=1226993
suse_bugzilla	https://git.kernel.org/stable/c/0c0b4a49d3e7f49690a6827a41faeffad5df7e21	https://bugzilla.suse.com/show_bug.cgi?id=1226993
suse_bugzilla	https://www.cve.org/CVERecord?id=CVE-2024-39276	https://bugzilla.suse.com/show_bug.cgi?id=1226993
suse_bugzilla	https://bugzilla.redhat.com/show_bug.cgi?id=2294274	https://bugzilla.suse.com/show_bug.cgi?id=1226993
redhat_bugzilla	https://lore.kernel.org/linux-cve-announce/2024062548-CVE-2024-39276-5205@gregkh/T	https://bugzilla.redhat.com/show_bug.cgi?id=2294274
debian		https://security-tracker.debian.org/tracker/CVE-2024-39276
cve_search		https://git.kernel.org/stable/c/9ad75e78747b5a50dc5a52f0f8e92e920a653f16
cve_search		https://git.kernel.org/stable/c/896a7e7d0d555ad8b2b46af0c2fa7de7467f9483
cve_search		https://git.kernel.org/stable/c/76dc776153a47372719d664e0fc50d6355791abb
cve_search		https://git.kernel.org/stable/c/681ff9a09accd8a4379f8bd30b7a1641ee19bb3e
cve_search		https://git.kernel.org/stable/c/e941b712e758f615d311946bf98216e79145ccd9
cve_search		https://git.kernel.org/stable/c/a95df6f04f2c37291adf26a74205cde0314d4577
cve_search		https://git.kernel.org/stable/c/b37c0edef4e66fb21a2fbc211471195a383e5ab8
cve_search		https://git.kernel.org/stable/c/0c0b4a49d3e7f49690a6827a41faeffad5df7e21
ubuntu	https://www.cve.org/CVERecord?id=CVE-2024-39276	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://git.kernel.org/linus/0c0b4a49d3e7f49690a6827a41faeffad5df7e21 (6.10-rc1)	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://git.kernel.org/stable/c/9ad75e78747b5a50dc5a52f0f8e92e920a653f16	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://git.kernel.org/stable/c/896a7e7d0d555ad8b2b46af0c2fa7de7467f9483	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://git.kernel.org/stable/c/76dc776153a47372719d664e0fc50d6355791abb	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://git.kernel.org/stable/c/681ff9a09accd8a4379f8bd30b7a1641ee19bb3e	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://git.kernel.org/stable/c/e941b712e758f615d311946bf98216e79145ccd9	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://git.kernel.org/stable/c/a95df6f04f2c37291adf26a74205cde0314d4577	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://git.kernel.org/stable/c/b37c0edef4e66fb21a2fbc211471195a383e5ab8	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://git.kernel.org/stable/c/0c0b4a49d3e7f49690a6827a41faeffad5df7e21	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://nvd.nist.gov/vuln/detail/CVE-2024-39276	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://launchpad.net/bugs/cve/CVE-2024-39276	https://ubuntu.com/security/CVE-2024-39276
ubuntu	https://security-tracker.debian.org/tracker/CVE-2024-39276	https://ubuntu.com/security/CVE-2024-39276

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：

详情(点击展开)

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/0c0b4a49d3e7f49690a6827a41faeffad5df7e21	https://git.kernel.org/linus/fb265c9cb49e2074ddcdd4de99728aefdd3b3592	ubuntu

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:ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grownin the __entry_find(), won't be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.
openEuler评分：
4.7
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-20.03-LTS-SP1(4.19.90):受影响
2.openEuler-20.03-LTS-SP4(4.19.90):受影响
3.openEuler-22.03-LTS-SP1(5.10.0):受影响
4.openEuler-22.03-LTS-SP3(5.10.0):受影响
5.openEuler-24.03-LTS(6.6.0):受影响
6.openEuler-24.03-LTS-Next(6.6.0):受影响
7.openEuler-22.03-LTS(5.10.0):不受影响
8.openEuler-22.03-LTS-SP2(5.10.0):不受影响
9.openEuler-22.03-LTS-SP4(5.10.0):不受影响
10.master(6.1.0):不受影响
11.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
9.openEuler-24.03-LTS(6.6.0):否
10.openEuler-24.03-LTS-Next(6.6.0):否
11.openEuler-22.03-LTS-SP4(5.10.0):否

Hi openeuler-ci-bot, welcome to the openEuler Community.
I'm the Bot here serving you. You can find the instructions on how to interact with me at Here.
If you have any questions, please contact the SIG: Kernel, and any of the maintainers.

@YangYingliang ,@jiaoff ,@AlexGuo ,@hanjun-guo ,@woqidaideshi ,@Jackie Liu ,@Zhang Yi ,@colyli ,@ThunderTown ,@htforge ,@Chiqijun ,@冷嘲啊 ,@zhujianwei001 ,@kylin-mayukun ,@wangxiongfeng ,@Kefeng ,@SuperSix173 ,@WangShaoBo ,@Zheng Zucheng ,@陈结松
issue处理注意事项:
1. 当前issue受影响的分支提交pr时, 须在pr描述中填写当前issue编号进行关联, 否则无法关闭当前issue;
2. 模板内容需要填写完整, 无论是受影响或者不受影响都需要填写完整内容,未引入的分支不需要填写, 否则无法关闭当前issue;
3. 以下为模板中需要填写完整的内容, 请复制到评论区回复, 注: 内容的标题名称(影响性分析说明, openEuler评分, 受影响版本排查(受影响/不受影响), 修复是否涉及abi变化(是/否))不能省略,省略后cve-manager将无法正常解析填写内容.

影响性分析说明:

openEuler评分: (评分和向量)

受影响版本排查(受影响/不受影响):
1.master(6.1.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP1(5.10.0):
4.openEuler-22.03-LTS-SP3(5.10.0):
5.openEuler-22.03-LTS-SP4(5.10.0):
6.openEuler-24.03-LTS(6.6.0):
7.openEuler-24.03-LTS-Next(6.6.0):

修复是否涉及abi变化(是/否)：
1.master(6.1.0):
2.openEuler-20.03-LTS-SP4(4.19.90):
3.openEuler-22.03-LTS-SP1(5.10.0):
4.openEuler-22.03-LTS-SP3(5.10.0):
5.openEuler-22.03-LTS-SP4(5.10.0):
6.openEuler-24.03-LTS(6.6.0):
7.openEuler-24.03-LTS-Next(6.6.0):

issue处理具体操作请参考:
https://gitee.com/openeuler/cve-manager/blob/master/cve-vulner-manager/doc/md/manual.md
pr关联issue具体操作请参考:
https://gitee.com/help/articles/4142

参考网址	关联pr	状态	补丁链接
https://nvd.nist.gov/vuln/detail/CVE-2024-39276	None	None	https://git.kernel.org/stable/c/681ff9a09accd8a4379f8bd30b7a1641ee19bb3e https://git.kernel.org/stable/c/9ad75e78747b5a50dc5a52f0f8e92e920a653f16 https://git.kernel.org/stable/c/b37c0edef4e66fb21a2fbc211471195a383e5ab8 https://git.kernel.org/stable/c/a95df6f04f2c37291adf26a74205cde0314d4577 https://git.kernel.org/stable/c/e941b712e758f615d311946bf98216e79145ccd9 https://git.kernel.org/stable/c/76dc776153a47372719d664e0fc50d6355791abb https://git.kernel.org/stable/c/896a7e7d0d555ad8b2b46af0c2fa7de7467f9483 https://git.kernel.org/stable/c/0c0b4a49d3e7f49690a6827a41faeffad5df7e21
https://ubuntu.com/security/CVE-2024-39276	None	None	https://discourse.ubuntu.com/c/ubuntu-pro
https://www.opencve.io/cve/CVE-2024-39276	None	None	https://git.kernel.org/stable/c/681ff9a09accd8a4379f8bd30b7a1641ee19bb3e https://git.kernel.org/stable/c/9ad75e78747b5a50dc5a52f0f8e92e920a653f16 https://git.kernel.org/stable/c/b37c0edef4e66fb21a2fbc211471195a383e5ab8 https://git.kernel.org/stable/c/a95df6f04f2c37291adf26a74205cde0314d4577 https://git.kernel.org/stable/c/e941b712e758f615d311946bf98216e79145ccd9 https://git.kernel.org/stable/c/76dc776153a47372719d664e0fc50d6355791abb https://git.kernel.org/stable/c/896a7e7d0d555ad8b2b46af0c2fa7de7467f9483 https://git.kernel.org/stable/c/0c0b4a49d3e7f49690a6827a41faeffad5df7e21
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2024-39276
https://security-tracker.debian.org/tracker/CVE-2024-39276	None	None	https://git.kernel.org/linus/0c0b4a49d3e7f49690a6827a41faeffad5df7e21

说明：补丁链接仅供初步排查参考，实际可用性请人工再次确认，补丁下载验证可使用CVE补丁工具。
若补丁不准确，烦请在此issue下评论 '/report-patch 参考网址补丁链接1,补丁链接2' 反馈正确信息，便于我们不断优化工具，不胜感激。
如 /report-patch https://security-tracker.debian.org/tracker/CVE-2021-3997 https://github.com/systemd/systemd/commit/5b1cf7a9be37e20133c0208005274ce4a5b5c6a1

CVE-2024-39276

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()

Syzbot reports a warning as follows:

============================================
WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7
RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419
Call Trace:
<TASK>
ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_block_super+0x44/0x90 fs/super.c:1675
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327
[...]

This is because when finding an entry in ext4_xattr_block_cache_find(), if
ext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown
in the __entry_find(), won't be put away, and eventually trigger the above
issue in mb_cache_destroy() due to reference count leakage.

So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.

The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.

openEuler评分:(评分和向量)
4.7
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-20.03-LTS-SP1:受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:受影响
7.openEuler-22.03-LTS-SP4:不受影响
8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:不受影响
10.openEuler-24.03-LTS:受影响
11.openEuler-24.03-LTS-Next: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:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
11.openEuler-22.03-LTS-SP4:否

@ 经过 cve-manager 解析, 已分析的内容如下表所示:

状态	需分析	内容
已分析	1.影响性分析说明	In the Linux kernel, the following vulnerability has been resolved:ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grownin the __entry_find(), won't be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.
已分析	2.openEulerScore	4.7
已分析	3.openEulerVector	AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
已分析	4.受影响版本排查	openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-Next:受影响,openEuler-22.03-LTS:不受影响,openEuler-22.03-LTS-SP2:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响
已分析	5.修复是否涉及abi变化	openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

@成坚 (CHENG Jian) ,@Xie XiuQi ,@YangYingliang ,@pi3orama ,@jiaoff ,@郭梦琪
关闭issue前,需要将受影响的分支在合并pr时关联上当前issue编号: #IA8AER:CVE-2024-39276
受影响分支: openEuler-20.03-LTS-SP4/openEuler-22.03-LTS-SP1/openEuler-22.03-LTS-SP3/openEuler-24.03-LTS/openEuler-24.03-LTS-Next
具体操作参考: https://gitee.com/help/articles/4142

@成坚 (CHENG Jian) ,@Xie XiuQi ,@YangYingliang ,@pi3orama ,@jiaoff ,@ci-robot
关闭issue前,需要将受影响的分支在合并pr时关联上当前issue编号: #IA8AER:CVE-2024-39276
受影响分支: openEuler-20.03-LTS-SP4/openEuler-22.03-LTS-SP1/openEuler-22.03-LTS-SP3/openEuler-24.03-LTS/openEuler-24.03-LTS-Next
具体操作参考: https://gitee.com/help/articles/4142

CVE-2024-39276

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()

Syzbot reports a warning as follows:

============================================
WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7
RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419
Call Trace:
<TASK>
ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_block_super+0x44/0x90 fs/super.c:1675
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327
[...]

This is because when finding an entry in ext4_xattr_block_cache_find(), if
ext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown
in the __entry_find(), won't be put away, and eventually trigger the above
issue in mb_cache_destroy() due to reference count leakage.

So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.

The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.

openEuler评分:(评分和向量)
4.7
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-20.03-LTS-SP1:受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:受影响
7.openEuler-22.03-LTS-SP4:不受影响
8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:不受影响
10.openEuler-24.03-LTS:受影响
11.openEuler-24.03-LTS-Next: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:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
11.openEuler-22.03-LTS-SP4:否

@ 经过 cve-manager 解析, 已分析的内容如下表所示:

状态	需分析	内容
已分析	1.影响性分析说明	In the Linux kernel, the following vulnerability has been resolved:ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grownin the __entry_find(), won't be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.
已分析	2.openEulerScore	4.7
已分析	3.openEulerVector	AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
已分析	4.受影响版本排查	openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-Next:受影响,openEuler-22.03-LTS:不受影响,openEuler-22.03-LTS-SP2:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响
已分析	5.修复是否涉及abi变化	openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

@成坚 (CHENG Jian) ,@Xie XiuQi ,@YangYingliang ,@pi3orama ,@jiaoff ,@郭梦琪
关闭issue前,需要将受影响的分支在合并pr时关联上当前issue编号: #IA8AER:CVE-2024-39276
受影响分支: openEuler-20.03-LTS-SP4/openEuler-22.03-LTS-SP1/openEuler-22.03-LTS-SP3/openEuler-24.03-LTS/openEuler-24.03-LTS-Next
具体操作参考: https://gitee.com/help/articles/4142

CVE-2024-39276

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()

Syzbot reports a warning as follows:

============================================
WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7
RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419
Call Trace:
<TASK>
ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_block_super+0x44/0x90 fs/super.c:1675
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327
[...]

This is because when finding an entry in ext4_xattr_block_cache_find(), if
ext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown
in the __entry_find(), won't be put away, and eventually trigger the above
issue in mb_cache_destroy() due to reference count leakage.

So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.

The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.

openEuler评分:(评分和向量)
4.7
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-20.03-LTS-SP1:受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:受影响
7.openEuler-22.03-LTS-SP4:不受影响
8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:不受影响
10.openEuler-24.03-LTS:受影响
11.openEuler-24.03-LTS-Next: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:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
11.openEuler-22.03-LTS-SP4:否

@ 经过 cve-manager 解析, 已分析的内容如下表所示:

状态	需分析	内容
已分析	1.影响性分析说明	In the Linux kernel, the following vulnerability has been resolved:ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grownin the __entry_find(), won't be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.
已分析	2.openEulerScore	4.7
已分析	3.openEulerVector	AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
已分析	4.受影响版本排查	openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-Next:受影响,openEuler-22.03-LTS:不受影响,openEuler-22.03-LTS-SP2:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响
已分析	5.修复是否涉及abi变化	openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

CVE-2024-39276

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()

Syzbot reports a warning as follows:

============================================
WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7
RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419
Call Trace:
<TASK>
ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_block_super+0x44/0x90 fs/super.c:1675
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327
[...]

This is because when finding an entry in ext4_xattr_block_cache_find(), if
ext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown
in the __entry_find(), won't be put away, and eventually trigger the above
issue in mb_cache_destroy() due to reference count leakage.

So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.

The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.

openEuler评分:(评分和向量)
4.7
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-20.03-LTS-SP1:受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:受影响
7.openEuler-22.03-LTS-SP4:不受影响
8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:不受影响
10.openEuler-24.03-LTS:受影响
11.openEuler-24.03-LTS-Next: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:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
11.openEuler-22.03-LTS-SP4:否

@ 经过 cve-manager 解析, 已分析的内容如下表所示:

状态	需分析	内容
已分析	1.影响性分析说明	In the Linux kernel, the following vulnerability has been resolved:ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grownin the __entry_find(), won't be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.
已分析	2.openEulerScore	4.7
已分析	3.openEulerVector	AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
已分析	4.受影响版本排查	openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-Next:受影响,openEuler-22.03-LTS:不受影响,openEuler-22.03-LTS-SP2:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响
已分析	5.修复是否涉及abi变化	openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

CVE-2024-39276

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()

Syzbot reports a warning as follows:

============================================
WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7
RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419
Call Trace:
<TASK>
ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_block_super+0x44/0x90 fs/super.c:1675
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327
[...]

This is because when finding an entry in ext4_xattr_block_cache_find(), if
ext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown
in the __entry_find(), won't be put away, and eventually trigger the above
issue in mb_cache_destroy() due to reference count leakage.

So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.

The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.

openEuler评分:(评分和向量)
4.7
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-20.03-LTS-SP1:受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:受影响
7.openEuler-22.03-LTS-SP4:不受影响
8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:不受影响
10.openEuler-24.03-LTS:受影响
11.openEuler-24.03-LTS-Next: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:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
11.openEuler-22.03-LTS-SP4:否

@ 经过 cve-manager 解析, 已分析的内容如下表所示:

状态	需分析	内容
已分析	1.影响性分析说明	In the Linux kernel, the following vulnerability has been resolved:ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grownin the __entry_find(), won't be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.
已分析	2.openEulerScore	4.7
已分析	3.openEulerVector	AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
已分析	4.受影响版本排查	openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-Next:受影响,openEuler-22.03-LTS:不受影响,openEuler-22.03-LTS-SP2:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响
已分析	5.修复是否涉及abi变化	openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

CVE-2024-39276

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()

Syzbot reports a warning as follows:

============================================
WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7
RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419
Call Trace:
<TASK>
ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_block_super+0x44/0x90 fs/super.c:1675
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327
[...]

This is because when finding an entry in ext4_xattr_block_cache_find(), if
ext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown
in the __entry_find(), won't be put away, and eventually trigger the above
issue in mb_cache_destroy() due to reference count leakage.

So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.

The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.

openEuler评分:(评分和向量)
4.7
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-20.03-LTS-SP1:受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:受影响
7.openEuler-22.03-LTS-SP4:不受影响
8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:不受影响
10.openEuler-24.03-LTS:受影响
11.openEuler-24.03-LTS-Next: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:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
11.openEuler-22.03-LTS-SP4:否

@ 经过 cve-manager 解析, 已分析的内容如下表所示:

状态	需分析	内容
已分析	1.影响性分析说明	In the Linux kernel, the following vulnerability has been resolved:ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grownin the __entry_find(), won't be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.
已分析	2.openEulerScore	4.7
已分析	3.openEulerVector	AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
已分析	4.受影响版本排查	openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-Next:受影响,openEuler-22.03-LTS:不受影响,openEuler-22.03-LTS-SP2:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响
已分析	5.修复是否涉及abi变化	openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

@成坚 (CHENG Jian) ,@Xie XiuQi ,@YangYingliang ,@pi3orama ,@jiaoff ,@ci-robot
关闭issue前,需要将受影响的分支在合并pr时关联上当前issue编号: #IA8AER:CVE-2024-39276
受影响分支: openEuler-20.03-LTS-SP4/openEuler-22.03-LTS-SP1/openEuler-22.03-LTS-SP3/openEuler-24.03-LTS/openEuler-24.03-LTS-Next
具体操作参考: https://gitee.com/help/articles/4142

CVE-2024-39276

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()

Syzbot reports a warning as follows:

============================================
WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7
RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419
Call Trace:
<TASK>
ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_block_super+0x44/0x90 fs/super.c:1675
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327
[...]

This is because when finding an entry in ext4_xattr_block_cache_find(), if
ext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown
in the __entry_find(), won't be put away, and eventually trigger the above
issue in mb_cache_destroy() due to reference count leakage.

So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.

The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.

openEuler评分:(评分和向量)
4.7
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-20.03-LTS-SP1:受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:受影响
7.openEuler-22.03-LTS-SP4:不受影响
8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:不受影响
10.openEuler-24.03-LTS:受影响
11.openEuler-24.03-LTS-Next: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:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
11.openEuler-22.03-LTS-SP4:否

@ 经过 cve-manager 解析, 已分析的内容如下表所示:

状态	需分析	内容
已分析	1.影响性分析说明	In the Linux kernel, the following vulnerability has been resolved:ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grownin the __entry_find(), won't be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.
已分析	2.openEulerScore	4.7
已分析	3.openEulerVector	AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
已分析	4.受影响版本排查	openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-Next:受影响,openEuler-22.03-LTS:不受影响,openEuler-22.03-LTS-SP2:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响
已分析	5.修复是否涉及abi变化	openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

@成坚 (CHENG Jian) ,@Xie XiuQi ,@YangYingliang ,@pi3orama ,@jiaoff ,@郭梦琪
关闭issue前,需要将受影响的分支在合并pr时关联上当前issue编号: #IA8AER:CVE-2024-39276
受影响分支: openEuler-20.03-LTS-SP4/openEuler-22.03-LTS-SP1/openEuler-22.03-LTS-SP3/openEuler-24.03-LTS/openEuler-24.03-LTS-Next
具体操作参考: https://gitee.com/help/articles/4142

@成坚 (CHENG Jian) ,@Xie XiuQi ,@YangYingliang ,@pi3orama ,@jiaoff ,@ci-robot
关闭issue前,需要将受影响的分支在合并pr时关联上当前issue编号: #IA8AER:CVE-2024-39276
受影响分支: openEuler-22.03-LTS-SP3/openEuler-24.03-LTS/openEuler-24.03-LTS-Next/openEuler-20.03-LTS-SP4/openEuler-22.03-LTS-SP1
具体操作参考: https://gitee.com/help/articles/4142

@成坚 (CHENG Jian) ,@Xie XiuQi ,@YangYingliang ,@pi3orama ,@jiaoff ,@ci-robot
关闭issue前,需要将受影响的分支在合并pr时关联上当前issue编号: #IA8AER:CVE-2024-39276
受影响分支: openEuler-24.03-LTS/openEuler-24.03-LTS-Next/openEuler-20.03-LTS-SP4/openEuler-22.03-LTS-SP3
具体操作参考: https://gitee.com/help/articles/4142

CVE-2024-39276

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()

Syzbot reports a warning as follows:

============================================
WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7
RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419
Call Trace:
<TASK>
ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_block_super+0x44/0x90 fs/super.c:1675
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327
[...]

This is because when finding an entry in ext4_xattr_block_cache_find(), if
ext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown
in the __entry_find(), won't be put away, and eventually trigger the above
issue in mb_cache_destroy() due to reference count leakage.

So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.

The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.

openEuler评分:(评分和向量)
4.7
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-20.03-LTS-SP1:受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:受影响
7.openEuler-22.03-LTS-SP4:不受影响
8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:不受影响
10.openEuler-24.03-LTS:受影响
11.openEuler-24.03-LTS-Next: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:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
11.openEuler-22.03-LTS-SP4:否

@sanglipeng 经过 cve-manager 解析, 已分析的内容如下表所示:

状态	需分析	内容
已分析	1.影响性分析说明	In the Linux kernel, the following vulnerability has been resolved:ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grownin the __entry_find(), won't be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.
已分析	2.openEulerScore	4.7
已分析	3.openEulerVector	AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
已分析	4.受影响版本排查	openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-Next:受影响,openEuler-22.03-LTS:不受影响,openEuler-22.03-LTS-SP2:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响
已分析	5.修复是否涉及abi变化	openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

@成坚 (CHENG Jian) ,@Xie XiuQi ,@YangYingliang ,@pi3orama ,@jiaoff ,@郭梦琪
关闭issue前,需要将受影响的分支在合并pr时关联上当前issue编号: #IA8AER:CVE-2024-39276
受影响分支: openEuler-20.03-LTS-SP4/openEuler-22.03-LTS-SP3/openEuler-24.03-LTS/openEuler-24.03-LTS-Next
具体操作参考: https://gitee.com/help/articles/4142

CVE-2024-39276

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()

Syzbot reports a warning as follows:

============================================
WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7
RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419
Call Trace:
<TASK>
ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_block_super+0x44/0x90 fs/super.c:1675
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327
[...]

This is because when finding an entry in ext4_xattr_block_cache_find(), if
ext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown
in the __entry_find(), won't be put away, and eventually trigger the above
issue in mb_cache_destroy() due to reference count leakage.

So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.

The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.

openEuler评分:(评分和向量)
4.7
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-20.03-LTS-SP1:受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:受影响
7.openEuler-22.03-LTS-SP4:不受影响
8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:不受影响
10.openEuler-24.03-LTS:受影响
11.openEuler-24.03-LTS-Next: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:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
11.openEuler-22.03-LTS-SP4:否

@sanglipeng 经过 cve-manager 解析, 已分析的内容如下表所示:

状态	需分析	内容
已分析	1.影响性分析说明	In the Linux kernel, the following vulnerability has been resolved:ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grownin the __entry_find(), won't be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.
已分析	2.openEulerScore	4.7
已分析	3.openEulerVector	AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
已分析	4.受影响版本排查	openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-Next:受影响,openEuler-22.03-LTS:不受影响,openEuler-22.03-LTS-SP2:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响
已分析	5.修复是否涉及abi变化	openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

CVE-2024-39276

影响性分析说明：
In the Linux kernel, the following vulnerability has been resolved:

ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()

Syzbot reports a warning as follows:

============================================
WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290
Modules linked in:
CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7
RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419
Call Trace:
<TASK>
ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375
generic_shutdown_super+0x136/0x2d0 fs/super.c:641
kill_block_super+0x44/0x90 fs/super.c:1675
ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327
[...]

This is because when finding an entry in ext4_xattr_block_cache_find(), if
ext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grown
in the __entry_find(), won't be put away, and eventually trigger the above
issue in mb_cache_destroy() due to reference count leakage.

So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.

The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.

openEuler评分:(评分和向量)
4.7
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-20.03-LTS-SP1:受影响
2.openEuler-20.03-LTS-SP4:受影响
3.openEuler-22.03-LTS:不受影响
4.openEuler-22.03-LTS-SP1:受影响
5.openEuler-22.03-LTS-SP2:不受影响
6.openEuler-22.03-LTS-SP3:受影响
7.openEuler-22.03-LTS-SP4:不受影响
8.master(6.1.0):不受影响
9.openEuler-22.03-LTS-Next:不受影响
10.openEuler-24.03-LTS:受影响
11.openEuler-24.03-LTS-Next: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:否
3.openEuler-22.03-LTS:否
4.openEuler-22.03-LTS-SP1:否
5.openEuler-22.03-LTS-SP2:否
6.openEuler-22.03-LTS-SP3:否
7.master(6.1.0):否
8.openEuler-22.03-LTS-Next:否
9.openEuler-24.03-LTS:否
10.openEuler-24.03-LTS-Next:否
11.openEuler-22.03-LTS-SP4:否

@sanglipeng 经过 cve-manager 解析, 已分析的内容如下表所示:

状态	需分析	内容
已分析	1.影响性分析说明	In the Linux kernel, the following vulnerability has been resolved:ext4: fix mb_cache_entry's e_refcnt leak in ext4_xattr_block_cache_find()Syzbot reports a warning as follows:============================================WARNING: CPU: 0 PID: 5075 at fs/mbcache.c:419 mb_cache_destroy+0x224/0x290Modules linked in:CPU: 0 PID: 5075 Comm: syz-executor199 Not tainted 6.9.0-rc6-gb947cc5bf6d7RIP: 0010:mb_cache_destroy+0x224/0x290 fs/mbcache.c:419Call Trace: <TASK> ext4_put_super+0x6d4/0xcd0 fs/ext4/super.c:1375 generic_shutdown_super+0x136/0x2d0 fs/super.c:641 kill_block_super+0x44/0x90 fs/super.c:1675 ext4_kill_sb+0x68/0xa0 fs/ext4/super.c:7327[...]============================================This is because when finding an entry in ext4_xattr_block_cache_find(), ifext4_sb_bread() returns -ENOMEM, the ce's e_refcnt, which has already grownin the __entry_find(), won't be put away, and eventually trigger the aboveissue in mb_cache_destroy() due to reference count leakage.So call mb_cache_entry_put() on the -ENOMEM error branch as a quick fix.The Linux kernel CVE team has assigned CVE-2024-39276 to this issue.
已分析	2.openEulerScore	4.7
已分析	3.openEulerVector	AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:N
已分析	4.受影响版本排查	openEuler-20.03-LTS-SP1:受影响,openEuler-20.03-LTS-SP4:受影响,openEuler-22.03-LTS-SP1:受影响,openEuler-22.03-LTS-SP3:受影响,openEuler-24.03-LTS:受影响,openEuler-24.03-LTS-Next:受影响,openEuler-22.03-LTS:不受影响,openEuler-22.03-LTS-SP2:不受影响,openEuler-22.03-LTS-SP4:不受影响,master:不受影响,openEuler-22.03-LTS-Next:不受影响
已分析	5.修复是否涉及abi变化	openEuler-20.03-LTS-SP1:否,openEuler-20.03-LTS-SP4:否,openEuler-22.03-LTS:否,openEuler-22.03-LTS-SP1:否,openEuler-22.03-LTS-SP2:否,openEuler-22.03-LTS-SP3:否,master:否,openEuler-22.03-LTS-Next:否,openEuler-24.03-LTS:否,openEuler-24.03-LTS-Next:否,openEuler-22.03-LTS-SP4:否

请确认分析内容的准确性, 确认无误后, 您可以进行后续步骤, 否则您可以继续分析.

@成坚 (CHENG Jian) ,@Xie XiuQi ,@YangYingliang ,@pi3orama ,@jiaoff ,@郭梦琪
关闭issue前,需要将受影响的分支在合并pr时关联上当前issue编号: #IA8AER:CVE-2024-39276
受影响分支: openEuler-22.03-LTS-SP3/openEuler-24.03-LTS/openEuler-24.03-LTS-Next/openEuler-20.03-LTS-SP4
具体操作参考: https://gitee.com/help/articles/4142

src-openEuler / kernel

内容风险标识

CVE-2024-39276

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内容风险标识

CVE-2024-39276

评论 (35)

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