Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: f2fs: validate compress cache inode only when enabled F2FS_COMPRESS_INO() uses NM_I(sbi)->max_nid as the synthetic inode number for the compressed page cache inode. That inode only exists when the compress_cache mount option is enabled. When compress_cache is disabled, max_nid is outside the valid inode range. A corrupted directory entry that points to ino == max_nid should therefore be rejected by f2fs_check_nid_range(). However, is_meta_ino() currently treats F2FS_COMPRESS_INO() as a meta inode unconditionally, so f2fs_iget() bypasses do_read_inode() and its nid range check, and instantiates a fake internal inode instead. Gate the compressed cache inode case on COMPRESS_CACHE, matching f2fs_init_compress_inode(). With compress_cache disabled, ino == max_nid now follows the normal inode path and is rejected as an out-of-range nid.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 6ce19aff0b8cd386860855185c6cd79337fc4d2b before fcc051d377a9701a452e7663a1a8223c26225df9; affected 6ce19aff0b8cd386860855185c6cd79337fc4d2b before 29115b8c9172d34e67ab26cc4f6c209b7a236d7a; affected 6ce19aff0b8cd386860855185c6cd79337fc4d2b before 13e4b59d3a9413f66f116fa6c4828519b960a5ea; affected 6ce19aff0b8cd386860855185c6cd79337fc4d2b before 16161444c30d8dff9428abbae42b72ce4e32a932; affected 6ce19aff0b8cd386860855185c6cd79337fc4d2b before 77f216ff9ce5cde8eed9f6d12707e906dffdc9f7; affected 6ce19aff0b8cd386860855185c6cd79337fc4d2b before 0969926d987bbde9a1aa49da317582ba37095805; affected 6ce19aff0b8cd386860855185c6cd79337fc4d2b before 5073c66a96a9c23c0c2533ed4ed06e42f9021208; affected a23706426da9b611be5beae0f3faa260fb453b4e; affected 5.13.19 before 5.14 |
| Linux / Linux | affected 5.14; unaffected 0 before 5.14; unaffected 5.15.212 through 5.15.*; unaffected 6.1.177 through 6.1.*; 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/fcc051d377a9701a452e7663a1a8223c26225df9
- https://git.kernel.org/stable/c/29115b8c9172d34e67ab26cc4f6c209b7a236d7a
- https://git.kernel.org/stable/c/13e4b59d3a9413f66f116fa6c4828519b960a5ea
- https://git.kernel.org/stable/c/16161444c30d8dff9428abbae42b72ce4e32a932
- https://git.kernel.org/stable/c/77f216ff9ce5cde8eed9f6d12707e906dffdc9f7
- https://git.kernel.org/stable/c/0969926d987bbde9a1aa49da317582ba37095805
- https://git.kernel.org/stable/c/5073c66a96a9c23c0c2533ed4ed06e42f9021208