[PATCH 1/2] super: move lockdep assert

[Christian Brauner <brauner@xxxxxxxxxx>]

Fix braino and move the lockdep assertion after put_super() otherwise we
risk a use-after-free.

Fixes: 2c18a63b760a ("super: wait until we passed kill super")
Signed-off-by: Christian Brauner <brauner@xxxxxxxxxx>
---
 fs/super.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/super.c b/fs/super.c
index ef87103e2a51..779247eb219c 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -570,8 +570,8 @@ static bool grab_super_dead(struct super_block *sb)
 		return true;
 	}
 	wait_var_event(&sb->s_flags, wait_dead(sb));
-	put_super(sb);
 	lockdep_assert_not_held(&sb->s_umount);
+	put_super(sb);
 	return false;
 }
 

-- 
2.34.1