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.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
73934e535cffbda1490fa97d82690a0f9aa73e94 to < b8ced2b9a23a1a2c1e0ed8d0d02512e51bdf38daaffected548812afd96982a76a93ba76c0582ea670c40d9e to < 43f26094d6702e494e800532c3f1606e7a68eb30affected3fa640d035e5ae526769615c35cb9ed4be6e3662 to < 4479db143390bdcadc1561292aab579cdfa9f6c6affected3fa640d035e5ae526769615c35cb9ed4be6e3662 to < a2182743a8b4969481f64aec4908ff162e8a206caffectedff4528bbc82d0d90073751f7b49e7b9e9c7e5638affected6.6.64 to < 6.6.95affected6.12.2 to < 6.12.35affected6.11.11 to < 6.12affected
Linux Linux
Default version status: affected
6.13affected0 to < 6.13unaffected6.6.95 to ≤ 6.6.*unaffected6.12.35 to ≤ 6.12.*unaffected6.15.4 to ≤ 6.15.*unaffected6.16 to ≤ *unaffected