From 659038428cb43a66e3eff71e2c845c9de3611a98 Mon Sep 17 00:00:00 2001
From: Al Viro <viro@zeniv.linux.org.uk>
Date: Tue, 3 Apr 2018 00:13:17 -0400
Subject: [PATCH] orangefs_kill_sb(): deal with allocation failures
Git-commit: 659038428cb43a66e3eff71e2c845c9de3611a98
Patch-mainline: v4.17-rc2
References: bsc#1051510
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
fs/orangefs/super.c | 5 +++++
1 file changed, 5 insertions(+)
diff --git a/fs/orangefs/super.c b/fs/orangefs/super.c
index 3ae5fdba0225..10796d3fe27d 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
--
2.19.0