afs: Fix key leak in afs_release() and afs_evict_inode()

Fix afs_release() to go through the cleanup part of the function if
FMODE_WRITE is set rather than exiting through vfs_fsync() (which skips the
cleanup).  The cleanup involves discarding the refs on the key used for
file ops and the writeback key record.

Also fix afs_evict_inode() to clean up any left over wb keys attached to
the inode/vnode when it is removed.

Fixes: 5a8132761609 ("afs: Do better accretion of small writes on newly created content")
Signed-off-by: David Howells <dhowells@redhat.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index c4652b42d545..f30aa5eacd39 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -573,6 +573,7 @@ void afs_evict_inode(struct inode *inode)
         }
 #endif
 
+        afs_prune_wb_keys(vnode);
         afs_put_permits(rcu_access_pointer(vnode->permit_cache));
         key_put(vnode->silly_key);
         vnode->silly_key = NULL;