cve-2024-26685
Vulnerability from cvelistv5
Published
2024-04-03 14:54
Modified
2024-12-19 08:45
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix potential bug in end_buffer_async_write According to a syzbot report, end_buffer_async_write(), which handles the completion of block device writes, may detect abnormal condition of the buffer async_write flag and cause a BUG_ON failure when using nilfs2. Nilfs2 itself does not use end_buffer_async_write(). But, the async_write flag is now used as a marker by commit 7f42ec394156 ("nilfs2: fix issue with race condition of competition between segments for dirty blocks") as a means of resolving double list insertion of dirty blocks in nilfs_lookup_dirty_data_buffers() and nilfs_lookup_node_buffers() and the resulting crash. This modification is safe as long as it is used for file data and b-tree node blocks where the page caches are independent. However, it was irrelevant and redundant to also introduce async_write for segment summary and super root blocks that share buffers with the backing device. This led to the possibility that the BUG_ON check in end_buffer_async_write would fail as described above, if independent writebacks of the backing device occurred in parallel. The use of async_write for segment summary buffers has already been removed in a previous change. Fix this issue by removing the manipulation of the async_write flag for the remaining super root block buffer.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2c3bdba00283a6c7a5b19481a59a730f46063803
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5bc09b397cbf1221f8a8aacb1152650c9195b02b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/626daab3811b772086aef1bf8eed3ffe6f523eff
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6589f0f72f8edd1fa11adce4eedbd3615f2e78ab
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8fa90634ec3e9cc50f42dd605eec60f2d146ced8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c4a09fdac625e64abe478dcf88bfa20406616928
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d31c8721e816eff5ca6573cc487754f357c093cd
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f3e4963566f58726d3265a727116a42b591f6596
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/2c3bdba00283a6c7a5b19481a59a730f46063803
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/5bc09b397cbf1221f8a8aacb1152650c9195b02b
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/626daab3811b772086aef1bf8eed3ffe6f523eff
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/6589f0f72f8edd1fa11adce4eedbd3615f2e78ab
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/8fa90634ec3e9cc50f42dd605eec60f2d146ced8
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/c4a09fdac625e64abe478dcf88bfa20406616928
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/d31c8721e816eff5ca6573cc487754f357c093cd
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f3e4963566f58726d3265a727116a42b591f6596
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html
Impacted products
Vendor Product Version
Linux Linux Version: 3.12
Show details on NVD website

To clipboard 

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  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
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  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.