Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: erofs: reliably distinguish block based and fscache mode When erofs_kill_sb() is called in block dev based mode, s_bdev may not have been initialised yet, and if CONFIG_EROFS_FS_ONDEMAND is enabled, it will be mistaken for fscache mode, and then attempt to free an anon_dev that has never been allocated, triggering the following warning: ============================================ ida_free called for id=0 which is not allocated. WARNING: CPU: 14 PID: 926 at lib/idr.c:525 ida_free+0x134/0x140 Modules linked in: CPU: 14 PID: 926 Comm: mount Not tainted 6.9.0-rc3-dirty #630 RIP: 0010:ida_free+0x134/0x140 Call Trace: <TASK> erofs_kill_sb+0x81/0x90 deactivate_locked_super+0x35/0x80 get_tree_bdev+0x136/0x1e0 vfs_get_tree+0x2c/0xf0 do_new_mount+0x190/0x2f0 [...] ============================================ Now when erofs_kill_sb() is called, erofs_sb_info must have been initialised, so use sbi->fsid to distinguish between the two modes.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected aca740cecbe57b12bd9c1fc632092af5ebacda0c before f9b877a7ee312ec8ce17598a7ef85cb820d7c371; affected aca740cecbe57b12bd9c1fc632092af5ebacda0c before dcdd49701e429c55b3644fd70fc58d85745f8cfe; affected aca740cecbe57b12bd9c1fc632092af5ebacda0c before 7af2ae1b1531feab5d38ec9c8f472dc6cceb4606 |
| Linux / Linux | affected 6.6; unaffected 0 before 6.6; unaffected 6.6.32 through 6.6.*; unaffected 6.8.11 through 6.8.*; unaffected 6.9 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/f9b877a7ee312ec8ce17598a7ef85cb820d7c371
- https://git.kernel.org/stable/c/dcdd49701e429c55b3644fd70fc58d85745f8cfe
- https://git.kernel.org/stable/c/7af2ae1b1531feab5d38ec9c8f472dc6cceb4606
ADP enrichment
No English description supplied.
No references supplied.
No English description supplied.