Description
In the Linux kernel, the following vulnerability has been resolved: nilfs2: handle errors that nilfs_prepare_chunk() may return Patch series "nilfs2: fix issues with rename operations". This series fixes BUG_ON check failures reported by syzbot around rename operations, and a minor behavioral issue where the mtime of a child directory changes when it is renamed instead of moved. This patch (of 2): The directory manipulation routines nilfs_set_link() and nilfs_delete_entry() rewrite the directory entry in the folio/page previously read by nilfs_find_entry(), so error handling is omitted on the assumption that nilfs_prepare_chunk(), which prepares the buffer for rewriting, will always succeed for these. And if an error is returned, it triggers the legacy BUG_ON() checks in each routine. This assumption is wrong, as proven by syzbot: the buffer layer called by nilfs_prepare_chunk() may call nilfs_get_block() if necessary, which may fail due to metadata corruption or other reasons. This has been there all along, but improved sanity checks and error handling may have made it more reproducible in fuzzing tests. Fix this issue by adding missing error paths in nilfs_set_link(), nilfs_delete_entry(), and their caller nilfs_rename().
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
2ba466d74ed74f073257f86e61519cb8f8f46184 to < b38c6c260c2415c7f0968871305e7a093daabb4caffected2ba466d74ed74f073257f86e61519cb8f8f46184 to < f70bd2d8ca454e0ed78970f72147ca321dbaa015affected2ba466d74ed74f073257f86e61519cb8f8f46184 to < 607dc724b162f4452dc768865e578c1a509a1c8caffected2ba466d74ed74f073257f86e61519cb8f8f46184 to < 1ee2d454baa361d2964e3e2f2cca9ee3f769d93caffected2ba466d74ed74f073257f86e61519cb8f8f46184 to < 7891ac3b0a5c56f7148af507306308ab841cdc31affected2ba466d74ed74f073257f86e61519cb8f8f46184 to < eddd3176b8c4c83a46ab974574cda7c3dfe09388affected2ba466d74ed74f073257f86e61519cb8f8f46184 to < 481136234dfe96c7f92770829bec6111c7c5f5ddaffected2ba466d74ed74f073257f86e61519cb8f8f46184 to < ee70999a988b8abc3490609142f50ebaa8344432affected
Linux Linux
Default version status: affected
2.6.30affected0 to < 2.6.30unaffected5.4.291 to ≤ 5.4.*unaffected5.10.235 to ≤ 5.10.*unaffected5.15.179 to ≤ 5.15.*unaffected6.1.131 to ≤ 6.1.*unaffected6.6.80 to ≤ 6.6.*unaffected6.12.13 to ≤ 6.12.*unaffected6.13.2 to ≤ 6.13.*unaffected6.14 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/b38c6c260c2415c7f0968871305e7a093daabb4c ↗
- https://git.kernel.org/stable/c/f70bd2d8ca454e0ed78970f72147ca321dbaa015 ↗
- https://git.kernel.org/stable/c/607dc724b162f4452dc768865e578c1a509a1c8c ↗
- https://git.kernel.org/stable/c/1ee2d454baa361d2964e3e2f2cca9ee3f769d93c ↗
- https://git.kernel.org/stable/c/7891ac3b0a5c56f7148af507306308ab841cdc31 ↗
- https://git.kernel.org/stable/c/eddd3176b8c4c83a46ab974574cda7c3dfe09388 ↗
- https://git.kernel.org/stable/c/481136234dfe96c7f92770829bec6111c7c5f5dd ↗
- https://git.kernel.org/stable/c/ee70999a988b8abc3490609142f50ebaa8344432 ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html ↗