From: Andrey Vagin <avagin@xxxxxxxxxx>
This patch looks like it should be in the 3.8-stable tree, should we apply
it?
------------------
From: "Andrey Vagin <avagin@xxxxxxxxxx>"
commit e9c5d8a562f01b211926d70443378eb14b29a676 upstream
do_loopback calls lock_mount(path) and forget to unlock_mount
if clone_mnt or copy_mnt fails.
[ 77.661566] ================================================
[ 77.662939] [ BUG: lock held when returning to user space! ]
[ 77.664104] 3.9.0-rc5+ #17 Not tainted
[ 77.664982] ------------------------------------------------
[ 77.666488] mount/514 is leaving the kernel with locks still held!
[ 77.668027] 2 locks held by mount/514:
[ 77.668817] #0: (&sb->s_type->i_mutex_key#7){+.+.+.}, at: [<ffffffff811cca22>] lock_mount+0x32/0xe0
[ 77.671755] #1: (&namespace_sem){+++++.}, at: [<ffffffff811cca3a>] lock_mount+0x4a/0xe0
Signed-off-by: Andrey Vagin <avagin@xxxxxxxxxx>
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Jonghwan Choi <jhbird.choi@xxxxxxxxxxx>
---
fs/namespace.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/fs/namespace.c b/fs/namespace.c
index 5dd7709..4abc8c0 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1713,7 +1713,7 @@ static int do_loopback(struct path *path, const char *old_name,
if (IS_ERR(mnt)) {
err = PTR_ERR(mnt);
- goto out;
+ goto out2;
}
err = graft_tree(mnt, path);
--
1.7.10.4
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