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afs: Fix vllist leak

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Fix a leak of the new vllist in afs_update_cell() in the event that it is an
empty list (nr_servers == 0), in which case the old list isn't displaced
unless the old list is also empty.

Fixes: d5c32c89b2 ("afs: Fix cell DNS lookup")
Closes: https://sashiko.dev/#/patchset/20260609081738.770127-1-dhowells%40redhat.com
Signed-off-by: David Howells <dhowells@redhat.com>
Link: https://patch.msgid.link/20260622090856.2746629-18-dhowells@redhat.com
cc: Marc Dionne <marc.dionne@auristor.com>
cc: linux-afs@lists.infradead.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
This commit is contained in:
David Howells 2026-06-22 10:08:51 +01:00 committed by Christian Brauner
parent d672c276f6
commit fc10c0ecf0
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1 changed files with 2 additions and 0 deletions
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2
fs/afs/cell.c
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@ -547,6 +547,8 @@ static int afs_update_cell(struct afs_cell *cell)
rcu_assign_pointer(cell->vl_servers, vllist);
cell->dns_source = vllist->source;
old = p;
} else {
old = vllist;
}
write_unlock(&cell->vl_servers_lock);
afs_put_vlserverlist(cell->net, old);