ocfs2/dlm: add missing dlm_lock_put() when recovery master down

When the recovery master is down, the owner of $RECOVERY calls
dlm_do_local_recovery_cleanup() to prune any $RECOVERY entries for dead
nodes.  The lock is in the granted list and the refcount must be 2.  We
should put twice to remove this lock.  Otherwise, it will lead to a memory
leak.

Signed-off-by: joyce.xue <xuejiufei@huawei.com>
Reported-by: yangwenfang <vicky.yangwenfang@huawei.com>
Cc: Mark Fasheh <mfasheh@suse.com>
Cc: Joel Becker <jlbec@evilplan.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index cecd875653e4cc12d4326e7bf3e192106c0a94c0..ce12e0b1a31f180371e6ac010cac3e37fdfbad09 100644 (file)
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -1070,6 +1070,9 @@ static void dlm_move_reco_locks_to_list(struct dlm_ctxt *dlm,
                                             dead_node, dlm->name);
                                        list_del_init(&lock->list);
                                        dlm_lock_put(lock);
+                                       /* Can't schedule DLM_UNLOCK_FREE_LOCK
+                                        * - do manually */
+                                       dlm_lock_put(lock);
                                        break;
                                }
                        }
@@ -2346,6 +2349,10 @@ static void dlm_do_local_recovery_cleanup(struct dlm_ctxt *dlm, u8 dead_node)
                                                     dead_node, dlm->name);
                                                list_del_init(&lock->list);
                                                dlm_lock_put(lock);
+                                               /* Can't schedule
+                                                * DLM_UNLOCK_FREE_LOCK
+                                                * - do manually */
+                                               dlm_lock_put(lock);
                                                break;
                                        }
                                }