Description
In the Linux kernel, the following vulnerability has been resolved: smb: Log an error when close_all_cached_dirs fails Under low-memory conditions, close_all_cached_dirs() can't move the dentries to a separate list to dput() them once the locks are dropped. This will result in a "Dentry still in use" error, so add an error message that makes it clear this is what happened: [ 495.281119] CIFS: VFS: \\otters.example.com\share Out of memory while dropping dentries [ 495.281595] ------------[ cut here ]------------ [ 495.281887] BUG: Dentry ffff888115531138{i=78,n=/} still in use (2) [unmount of cifs cifs] [ 495.282391] WARNING: CPU: 1 PID: 2329 at fs/dcache.c:1536 umount_check+0xc8/0xf0 Also, bail out of looping through all tcons as soon as a single allocation fails, since we're already in trouble, and kmalloc() attempts for subseqeuent tcons are likely to fail just like the first one did.
Product status
73934e535cffbda1490fa97d82690a0f9aa73e94 (git) before b8ced2b9a23a1a2c1e0ed8d0d02512e51bdf38da
548812afd96982a76a93ba76c0582ea670c40d9e (git) before 43f26094d6702e494e800532c3f1606e7a68eb30
3fa640d035e5ae526769615c35cb9ed4be6e3662 (git) before 4479db143390bdcadc1561292aab579cdfa9f6c6
3fa640d035e5ae526769615c35cb9ed4be6e3662 (git) before a2182743a8b4969481f64aec4908ff162e8a206c
ff4528bbc82d0d90073751f7b49e7b9e9c7e5638 (git)
6.6.64 (semver) before 6.6.95
6.12.2 (semver) before 6.12.35
6.11.11 (semver) before 6.12
6.13
Any version before 6.13
6.6.95 (semver)
6.12.35 (semver)
6.15.4 (semver)
6.16 (original_commit_for_fix)
References
git.kernel.org/...c/b8ced2b9a23a1a2c1e0ed8d0d02512e51bdf38da
git.kernel.org/...c/43f26094d6702e494e800532c3f1606e7a68eb30
git.kernel.org/...c/4479db143390bdcadc1561292aab579cdfa9f6c6
git.kernel.org/...c/a2182743a8b4969481f64aec4908ff162e8a206c