Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: inotify: fix watch count leak when fsnotify_add_inode_mark_locked() fails When fsnotify_add_inode_mark_locked() fails in inotify_new_watch(), the error path calls inotify_remove_from_idr() but does not call dec_inotify_watches() to undo the preceding inc_inotify_watches(). This leaks a watch count, and repeated failures can exhaust the max_user_watches limit with -ENOSPC even when no watches are active. Prior to commit 1cce1eea0aff ("inotify: Convert to using per-namespace limits"), the watch count was incremented after fsnotify_add_mark_locked() succeeded, so this path was not affected. The conversion moved inc_inotify_watches() before the mark insertion without adding the corresponding rollback. Add the missing dec_inotify_watches() call in the error path.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 1cce1eea0aff51201753fcaca421df825b0813b6 before 3ab58cf42c46bf2366d2f55ae5c59299d5e178b7; affected 1cce1eea0aff51201753fcaca421df825b0813b6 before 10edf7e0ffdc7faa18e2244b17722c1b882b8273; affected 1cce1eea0aff51201753fcaca421df825b0813b6 before 3ad9ccea1b25435f6179b57aa891960beb7ce8f9; affected 1cce1eea0aff51201753fcaca421df825b0813b6 before 8bcc1cd237ab5ccfdd102869fa031c541943cf40; affected 1cce1eea0aff51201753fcaca421df825b0813b6 before 73ddc8518a32baff6bc17afda4ee1ebae5b4ed12; affected 1cce1eea0aff51201753fcaca421df825b0813b6 before fdaa42ca370d056428e5e171247c8fdce8dff36a; affected 1cce1eea0aff51201753fcaca421df825b0813b6 before 9e48844f708eb48bae4e79cb21edc097c966306d; affected 1cce1eea0aff51201753fcaca421df825b0813b6 before 6a320935fa4293e9e599ec9f85dc9eb3be7029f8 |
| Linux / Linux | affected 4.11; unaffected 0 before 4.11; unaffected 5.10.258 through 5.10.*; unaffected 5.15.209 through 5.15.*; unaffected 6.1.175 through 6.1.*; unaffected 6.6.140 through 6.6.*; unaffected 6.12.86 through 6.12.*; unaffected 6.18.27 through 6.18.*; unaffected 7.0.4 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/3ab58cf42c46bf2366d2f55ae5c59299d5e178b7
- https://git.kernel.org/stable/c/10edf7e0ffdc7faa18e2244b17722c1b882b8273
- https://git.kernel.org/stable/c/3ad9ccea1b25435f6179b57aa891960beb7ce8f9
- https://git.kernel.org/stable/c/8bcc1cd237ab5ccfdd102869fa031c541943cf40
- https://git.kernel.org/stable/c/73ddc8518a32baff6bc17afda4ee1ebae5b4ed12
- https://git.kernel.org/stable/c/fdaa42ca370d056428e5e171247c8fdce8dff36a
- https://git.kernel.org/stable/c/9e48844f708eb48bae4e79cb21edc097c966306d
- https://git.kernel.org/stable/c/6a320935fa4293e9e599ec9f85dc9eb3be7029f8
ADP enrichment
No English description supplied.