CVE-2024-35849

一、漏洞信息
 漏洞编号：[CVE-2024-35849](https://nvd.nist.gov/vuln/detail/CVE-2024-35849)
 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 V3.0分值：
  BaseScore：0.0 None
  Vector：CVSS：3.0/
 漏洞简述：
  In the Linux kernel, the following vulnerability has been resolved:btrfs: fix information leak in btrfs_ioctl_logical_to_ino()Syzbot reported the following information leak for inbtrfs_ioctl_logical_to_ino():  BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]  BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x110 lib/usercopy.c:40   instrument_copy_to_user include/linux/instrumented.h:114 [inline]   _copy_to_user+0xbc/0x110 lib/usercopy.c:40   copy_to_user include/linux/uaccess.h:191 [inline]   btrfs_ioctl_logical_to_ino+0x440/0x750 fs/btrfs/ioctl.c:3499   btrfs_ioctl+0x714/0x1260   vfs_ioctl fs/ioctl.c:51 [inline]   __do_sys_ioctl fs/ioctl.c:904 [inline]   __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890   __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890   x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17   do_syscall_x64 arch/x86/entry/common.c:52 [inline]   do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83   entry_SYSCALL_64_after_hwframe+0x77/0x7f  Uninit was created at:   __kmalloc_large_node+0x231/0x370 mm/slub.c:3921   __do_kmalloc_node mm/slub.c:3954 [inline]   __kmalloc_node+0xb07/0x1060 mm/slub.c:3973   kmalloc_node include/linux/slab.h:648 [inline]   kvmalloc_node+0xc0/0x2d0 mm/util.c:634   kvmalloc include/linux/slab.h:766 [inline]   init_data_container+0x49/0x1e0 fs/btrfs/backref.c:2779   btrfs_ioctl_logical_to_ino+0x17c/0x750 fs/btrfs/ioctl.c:3480   btrfs_ioctl+0x714/0x1260   vfs_ioctl fs/ioctl.c:51 [inline]   __do_sys_ioctl fs/ioctl.c:904 [inline]   __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890   __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890   x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17   do_syscall_x64 arch/x86/entry/common.c:52 [inline]   do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83   entry_SYSCALL_64_after_hwframe+0x77/0x7f  Bytes 40-65535 of 65536 are uninitialized  Memory access of size 65536 starts at ffff888045a40000This happens, because we re copying a  struct btrfs_data_container  backto user-space. This btrfs_data_container is allocated in init_data_container()  via kvmalloc(), which does not zero-fill thememory.Fix this by using kvzalloc() which zeroes out the memory on allocation.
 漏洞公开时间：2024-05-17 23:15:21
 漏洞创建时间：2024-05-17 15:49:59
 漏洞详情参考链接：
  https://nvd.nist.gov/vuln/detail/CVE-2024-35849
<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/2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/30189e54ba80e3209d34cfeea87b848f6ae025e6 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/689efe22e9b5b7d9d523119a9a5c3c17107a0772 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/73db209dcd4ae026021234d40cfcb2fb5b564b86 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/8bdbcfaf3eac42f98e5486b3d7e130fa287811f6 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/e58047553a4e859dafc8d1d901e1de77c9dd922d |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://git.kernel.org/stable/c/fddc19631c51d9c17d43e9f822a7bc403af88d54 |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html |  |
| 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html |  |
| suse_bugzilla | http://web.nvd.nist.gov/view/vuln/detail?vulnId=CVE-2024-35849 | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| suse_bugzilla | https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2024/CVE-2024-35849.mbox | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| suse_bugzilla | https://git.kernel.org/stable/c/689efe22e9b5b7d9d523119a9a5c3c17107a0772 | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| suse_bugzilla | https://git.kernel.org/stable/c/73db209dcd4ae026021234d40cfcb2fb5b564b86 | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| suse_bugzilla | https://git.kernel.org/stable/c/30189e54ba80e3209d34cfeea87b848f6ae025e6 | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| suse_bugzilla | https://git.kernel.org/stable/c/e58047553a4e859dafc8d1d901e1de77c9dd922d | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| suse_bugzilla | https://git.kernel.org/stable/c/8bdbcfaf3eac42f98e5486b3d7e130fa287811f6 | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| suse_bugzilla | https://git.kernel.org/stable/c/3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| suse_bugzilla | https://git.kernel.org/stable/c/fddc19631c51d9c17d43e9f822a7bc403af88d54 | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| suse_bugzilla | https://git.kernel.org/stable/c/2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| suse_bugzilla | https://www.cve.org/CVERecord?id=CVE-2024-35849 | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| suse_bugzilla | https://bugzilla.redhat.com/show_bug.cgi?id=2281263 | https://bugzilla.suse.com/show_bug.cgi?id=1224733 |
| redhat_bugzilla | https://lore.kernel.org/linux-cve-announce/2024051739-CVE-2024-35849-d74e@gregkh/T | https://bugzilla.redhat.com/show_bug.cgi?id=2281263 |
| debian |  | https://security-tracker.debian.org/tracker/CVE-2024-35849 |
| cve_search |  | https://git.kernel.org/stable/c/689efe22e9b5b7d9d523119a9a5c3c17107a0772 |
| cve_search |  | https://git.kernel.org/stable/c/73db209dcd4ae026021234d40cfcb2fb5b564b86 |
| cve_search |  | https://git.kernel.org/stable/c/30189e54ba80e3209d34cfeea87b848f6ae025e6 |
| cve_search |  | https://git.kernel.org/stable/c/e58047553a4e859dafc8d1d901e1de77c9dd922d |
| cve_search |  | https://git.kernel.org/stable/c/8bdbcfaf3eac42f98e5486b3d7e130fa287811f6 |
| cve_search |  | https://git.kernel.org/stable/c/3a63cee1a5e14a3e52c19142c61dd5fcb524f6dc |
| cve_search |  | https://git.kernel.org/stable/c/fddc19631c51d9c17d43e9f822a7bc403af88d54 |
| cve_search |  | https://git.kernel.org/stable/c/2f7ef5bb4a2f3e481ef05fab946edb97c84f67cf |
| mageia |  | http://advisories.mageia.org/MGASA-2024-0263.html |

</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：
  In the Linux kernel, the following vulnerability has been resolved:btrfs: fix information leak in btrfs_ioctl_logical_to_ino()Syzbot reported the following information leak for inbtrfs_ioctl_logical_to_ino():  BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]  BUG: KMSAN: kernel-infoleak in _copy_to_user+0xbc/0x110 lib/usercopy.c:40   instrument_copy_to_user include/linux/instrumented.h:114 [inline]   _copy_to_user+0xbc/0x110 lib/usercopy.c:40   copy_to_user include/linux/uaccess.h:191 [inline]   btrfs_ioctl_logical_to_ino+0x440/0x750 fs/btrfs/ioctl.c:3499   btrfs_ioctl+0x714/0x1260   vfs_ioctl fs/ioctl.c:51 [inline]   __do_sys_ioctl fs/ioctl.c:904 [inline]   __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890   __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890   x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17   do_syscall_x64 arch/x86/entry/common.c:52 [inline]   do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83   entry_SYSCALL_64_after_hwframe+0x77/0x7f  Uninit was created at:   __kmalloc_large_node+0x231/0x370 mm/slub.c:3921   __do_kmalloc_node mm/slub.c:3954 [inline]   __kmalloc_node+0xb07/0x1060 mm/slub.c:3973   kmalloc_node include/linux/slab.h:648 [inline]   kvmalloc_node+0xc0/0x2d0 mm/util.c:634   kvmalloc include/linux/slab.h:766 [inline]   init_data_container+0x49/0x1e0 fs/btrfs/backref.c:2779   btrfs_ioctl_logical_to_ino+0x17c/0x750 fs/btrfs/ioctl.c:3480   btrfs_ioctl+0x714/0x1260   vfs_ioctl fs/ioctl.c:51 [inline]   __do_sys_ioctl fs/ioctl.c:904 [inline]   __se_sys_ioctl+0x261/0x450 fs/ioctl.c:890   __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:890   x64_sys_call+0x1883/0x3b50 arch/x86/include/generated/asm/syscalls_64.h:17   do_syscall_x64 arch/x86/entry/common.c:52 [inline]   do_syscall_64+0xcf/0x1e0 arch/x86/entry/common.c:83   entry_SYSCALL_64_after_hwframe+0x77/0x7f  Bytes 40-65535 of 65536 are uninitialized  Memory access of size 65536 starts at ffff888045a40000This happens, because we re copying a  struct btrfs_data_container  backto user-space. This btrfs_data_container is allocated in init_data_container()  via kvmalloc(), which does not zero-fill thememory.Fix this by using kvzalloc() which zeroes out the memory on allocation.
 openEuler评分：
  5.5
 Vector：CVSS：3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
 受影响版本排查(受影响/不受影响)：
  1.openEuler-20.03-LTS-SP4(4.19.90):受影响
2.openEuler-22.03-LTS-SP1(5.10.0):受影响
3.openEuler-22.03-LTS-SP3(5.10.0):受影响
4.openEuler-22.03-LTS-SP4(5.10.0):受影响
5.master(6.6.0):不受影响
6.openEuler-24.03-LTS(6.6.0):不受影响
7.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-SP4(4.19.90):否
2.openEuler-22.03-LTS-SP1(5.10.0):否
3.openEuler-22.03-LTS-SP3(5.10.0):否
4.master(6.6.0):否
5.openEuler-24.03-LTS(6.6.0):否
6.openEuler-24.03-LTS-Next(6.6.0):否
7.openEuler-22.03-LTS-SP4(5.10.0):否

原因说明：
  1.master(6.6.0):
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):

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