tree 94886b6871d4522d3df83c3779c63d79149b2cbc
parent 60268940cd15491be6db4503d6f74f27fb38ae42
author David Howells <dhowells@redhat.com> 1585236247 +0000
committer Linus Torvalds <torvalds@linux-foundation.org> 1585263869 -0700

afs: Fix unpinned address list during probing

When it's probing all of a fileserver's interfaces to find which one is
best to use, afs_do_probe_fileserver() takes a lock on the server record
and notes the pointer to the address list.

It doesn't, however, pin the address list, so as soon as it drops the
lock, there's nothing to stop the address list from being freed under
us.

Fix this by taking a ref on the address list inside the locked section
and dropping it at the end of the function.

Fixes: 3bf0fb6f33dd ("afs: Probe multiple fileservers simultaneously")
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Marc Dionne <marc.dionne@auristor.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>