CVE-2025-38321

In the Linux kernel, the following vulnerability has been resolved:<br /> <br /> smb: Log an error when close_all_cached_dirs fails<br /> <br /> Under low-memory conditions, close_all_cached_dirs() can&amp;#39;t move the<br /> dentries to a separate list to dput() them once the locks are dropped.<br /> This will result in a "Dentry still in use" error, so add an error<br /> message that makes it clear this is what happened:<br /> <br /> [ 495.281119] CIFS: VFS: \\otters.example.com\share Out of memory while dropping dentries<br /> [ 495.281595] ------------[ cut here ]------------<br /> [ 495.281887] BUG: Dentry ffff888115531138{i=78,n=/} still in use (2) [unmount of cifs cifs]<br /> [ 495.282391] WARNING: CPU: 1 PID: 2329 at fs/dcache.c:1536 umount_check+0xc8/0xf0<br /> <br /> Also, bail out of looping through all tcons as soon as a single<br /> allocation fails, since we&amp;#39;re already in trouble, and kmalloc() attempts<br /> for subseqeuent tcons are likely to fail just like the first one did.