Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: fix WARNING in mark_buffer_dirty due to discarded buffer reuse A syzbot stress test using a corrupted disk image reported that mark_buffer_dirty() called from __nilfs_mark_inode_dirty() or nilfs_palloc_commit_alloc_entry() may output a kernel warning, and can panic if the kernel is booted with panic_on_warn. This is because nilfs2 keeps buffer pointers in local structures for some metadata and reuses them, but such buffers may be forcibly discarded by nilfs_clear_dirty_page() in some critical situations. This issue is reported to appear after commit 28a65b49eb53 ("nilfs2: do not write dirty data after degenerating to read-only"), but the issue has potentially existed before. Fix this issue by checking the uptodate flag when attempting to reuse an internally held buffer, and reloading the metadata instead of reusing the buffer if the flag was lost.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
8c26c4e2694a163d525976e804d81cd955bbb40c to < 473795610594f261e98920f0945550314df36f07affected8c26c4e2694a163d525976e804d81cd955bbb40c to < d95e403588738c7ec38f52b9f490b15e7745d393affected8c26c4e2694a163d525976e804d81cd955bbb40c to < 99a73016a5e12a09586a96f998e91f9ea145cd00affected8c26c4e2694a163d525976e804d81cd955bbb40c to < f1d637b63d8a27ac3386f186a694907f2717fc13affected8c26c4e2694a163d525976e804d81cd955bbb40c to < b911bef132a06de01a745c6a24172d6db7216333affected8c26c4e2694a163d525976e804d81cd955bbb40c to < 4da07e958bfda2d69d83db105780e8916e3ac02eaffected8c26c4e2694a163d525976e804d81cd955bbb40c to < 46c11be2dca295742a5508ea910a77f7733fb7f4affected8c26c4e2694a163d525976e804d81cd955bbb40c to < b308b3eabc429649b5501d36290cea403fbd746caffected8c26c4e2694a163d525976e804d81cd955bbb40c to < cdaac8e7e5a059f9b5e816cda257f08d0abffacdaffected
Linux Linux
Default version status: affected
3.10affected0 to < 3.10unaffected4.14.326 to ≤ 4.14.*unaffected4.19.295 to ≤ 4.19.*unaffected5.4.257 to ≤ 5.4.*unaffected5.10.195 to ≤ 5.10.*unaffected5.15.131 to ≤ 5.15.*unaffected6.1.52 to ≤ 6.1.*unaffected6.4.15 to ≤ 6.4.*unaffected6.5.2 to ≤ 6.5.*unaffected6.6 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/473795610594f261e98920f0945550314df36f07 ↗
- https://git.kernel.org/stable/c/d95e403588738c7ec38f52b9f490b15e7745d393 ↗
- https://git.kernel.org/stable/c/99a73016a5e12a09586a96f998e91f9ea145cd00 ↗
- https://git.kernel.org/stable/c/f1d637b63d8a27ac3386f186a694907f2717fc13 ↗
- https://git.kernel.org/stable/c/b911bef132a06de01a745c6a24172d6db7216333 ↗
- https://git.kernel.org/stable/c/4da07e958bfda2d69d83db105780e8916e3ac02e ↗
- https://git.kernel.org/stable/c/46c11be2dca295742a5508ea910a77f7733fb7f4 ↗
- https://git.kernel.org/stable/c/b308b3eabc429649b5501d36290cea403fbd746c ↗
- https://git.kernel.org/stable/c/cdaac8e7e5a059f9b5e816cda257f08d0abffacd ↗