[PATCH] locks: pass correct "before" pointer to locks_unlink_lock in generic_add_lease

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The argument to locks_unlink_lock can't be just any pointer to a
pointer. It must be a pointer to the fl_next field in the previous
lock in the list.

Cc: <stable@xxxxxxxxxxxxxxx> # v3.15+
Signed-off-by: Jeff Layton <jlayton@xxxxxxxxxxxxxxx>
---
 fs/locks.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/locks.c b/fs/locks.c
index cb66fb05ad4a..bb08857f90b5 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1619,7 +1619,7 @@ static int generic_add_lease(struct file *filp, long arg, struct file_lock **flp
 	smp_mb();
 	error = check_conflicting_open(dentry, arg);
 	if (error)
-		locks_unlink_lock(flp);
+		locks_unlink_lock(before);
 out:
 	if (is_deleg)
 		mutex_unlock(&inode->i_mutex);
-- 
1.9.3

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