From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 3 Apr 2018 04:13:17 +0000 (-0400)
Subject: orangefs_kill_sb(): deal with allocation failures
X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=659038428cb43a66e3eff71e2c845c9de3611a98;p=linux.git

orangefs_kill_sb(): deal with allocation failures

orangefs_fill_sb() might've failed to allocate ORANGEFS_SB(s); don't
oops in that case.

Cc: stable@kernel.org
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---

diff --git a/fs/orangefs/super.c b/fs/orangefs/super.c
index 3ae5fdba0225b..10796d3fe27d3 100644
--- a/fs/orangefs/super.c
+++ b/fs/orangefs/super.c
@@ -579,6 +579,11 @@ void orangefs_kill_sb(struct super_block *sb)
 	/* provided sb cleanup */
 	kill_anon_super(sb);
 
+	if (!ORANGEFS_SB(sb)) {
+		mutex_lock(&orangefs_request_mutex);
+		mutex_unlock(&orangefs_request_mutex);
+		return;
+	}
 	/*
 	 * issue the unmount to userspace to tell it to remove the
 	 * dynamic mount info it has for this superblock