Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: f2fs: fix incorrect FI_NO_EXTENT handling in __destroy_extent_node() When __destroy_extent_node() sets the inode flag FI_NO_EXTENT, it does not reset the length of the largest extent to 0 and update the inode folio. Since modifications to the extent tree are disallowed afterward, the cached largest extent may become stale. This can trigger the following error in xfstests generic/388: F2FS-fs (dm-0): sanity_check_extent_cache: inode (ino=1761) extent info [220057, 57, 6] is incorrect, run fsck to fix In the f2fs_drop_inode path, __destroy_extent_node() does not need to guarantee that et->node_cnt is 0, because concurrency with writeback is expected in this path, and writeback may update the extent cache. This patch reverts commit ed78aeebef05 ("f2fs: fix node_cnt race between extent node destroy and writeback"), and remove the unnecessary zero check of et->node_cnt.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 42dd1c91f993431d0b399502479d00e6ad1bca71 before 7e4d8f98be63f98856a5176b9188dada6e7ba9ee; affected ab1eaf9d5c99042f5b0243bf67a06283a4c0757f before 58a5deb220bcac4c73bf58954c0845644c997487; affected b0e4395870eb3441ddc959f6710b5f6ca61aff26 before 20190e498057997532c7f186d081011f18e0a462; affected ed78aeebef05212ef7dca93bd931e4eff67c113f before edf12cbeeeabe799bd2ee21fdb5c336cce6fbad7; affected ed78aeebef05212ef7dca93bd931e4eff67c113f before 1f70ddb28a3c71df124da5fa4040c808116d6bb9; affected 0559a0e962aacbb47519e26ee663be04b72dcb92; affected 6.6.140 before 6.6.144; affected 6.12.88 before 6.12.95; affected 6.18.30 before 6.18.38; affected 7.0.7 before 7.1 |
| Linux / Linux | affected 7.1; unaffected 0 before 7.1; unaffected 6.6.144 through 6.6.*; unaffected 6.12.95 through 6.12.*; unaffected 6.18.38 through 6.18.*; unaffected 7.1.3 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/7e4d8f98be63f98856a5176b9188dada6e7ba9ee
- https://git.kernel.org/stable/c/58a5deb220bcac4c73bf58954c0845644c997487
- https://git.kernel.org/stable/c/20190e498057997532c7f186d081011f18e0a462
- https://git.kernel.org/stable/c/edf12cbeeeabe799bd2ee21fdb5c336cce6fbad7
- https://git.kernel.org/stable/c/1f70ddb28a3c71df124da5fa4040c808116d6bb9