Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: xfs: fail recovery on a committed log item with no regions If the first op of a transaction is a bare transaction header (len == sizeof(struct xfs_trans_header)), xlog_recover_add_to_trans() adds an item but no region, leaving it on r_itemq with ri_cnt == 0 and ri_buf == NULL. The header can be split across op records, so later ops may still add regions; the item is only invalid if the transaction commits with none. The runtime commit path never emits such a transaction, so this only happens on a crafted log. It came from an AI-assisted code audit of the recovery parser. xlog_recover_reorder_trans() calls ITEM_TYPE() on the item, which reads *(unsigned short *)item->ri_buf[0].iov_base and faults on the NULL ri_buf. Reject it there, before the commit handlers that also read ri_buf[0]. KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] RIP: 0010:xlog_recover_reorder_trans (fs/xfs/xfs_log_recover.c:1836) xlog_recover_commit_trans (fs/xfs/xfs_log_recover.c:2043) xlog_recover_process_data (fs/xfs/xfs_log_recover.c:2501) xlog_do_recovery_pass (fs/xfs/xfs_log_recover.c:3244) xlog_recover (fs/xfs/xfs_log_recover.c:3493) xfs_log_mount (fs/xfs/xfs_log.c:618) xfs_mountfs (fs/xfs/xfs_mount.c:1034) xfs_fs_fill_super (fs/xfs/xfs_super.c:1938) vfs_get_tree (fs/super.c:1695) path_mount (fs/namespace.c:4161) __x64_sys_mount (fs/namespace.c:4367)
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 89cebc8477290b152618ffa110bbeae340d50900 before 5105426424ad6981db827cc1ada835a488fab035; affected 89cebc8477290b152618ffa110bbeae340d50900 before 226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4; affected 89cebc8477290b152618ffa110bbeae340d50900 before d0ae7ec3aa61db5140b107f0a63e017f63e56a96; affected 89cebc8477290b152618ffa110bbeae340d50900 before d50b1fd066d66ceb548ba43e332cfe8a47e5e55a; affected 89cebc8477290b152618ffa110bbeae340d50900 before d98f22d2e11e0a36493aeb25b2933571ee90d9a4; affected 89cebc8477290b152618ffa110bbeae340d50900 before cccbabeb9a18fcb978d76d6047f2b59214aa7749; affected 89cebc8477290b152618ffa110bbeae340d50900 before 2094dab19d45c487285617b7b68913d0cc0c1211 |
| Linux / Linux | affected 4.3; unaffected 0 before 4.3; unaffected 5.15.212 through 5.15.*; unaffected 6.1.178 through 6.1.*; unaffected 6.6.145 through 6.6.*; unaffected 6.12.96 through 6.12.*; unaffected 6.18.39 through 6.18.*; unaffected 7.1.4 through 7.1.*; unaffected 7.2 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/5105426424ad6981db827cc1ada835a488fab035
- https://git.kernel.org/stable/c/226a3c8bea7163c39fe0a1c0ffc7ab7410ef3ba4
- https://git.kernel.org/stable/c/d0ae7ec3aa61db5140b107f0a63e017f63e56a96
- https://git.kernel.org/stable/c/d50b1fd066d66ceb548ba43e332cfe8a47e5e55a
- https://git.kernel.org/stable/c/d98f22d2e11e0a36493aeb25b2933571ee90d9a4
- https://git.kernel.org/stable/c/cccbabeb9a18fcb978d76d6047f2b59214aa7749
- https://git.kernel.org/stable/c/2094dab19d45c487285617b7b68913d0cc0c1211