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Subject[PATCH 4.9 88/95] orangefs_kill_sb(): deal with allocation failures
Date
4.9-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Al Viro <viro@zeniv.linux.org.uk>

commit 659038428cb43a66e3eff71e2c845c9de3611a98 upstream.

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>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
fs/orangefs/super.c | 5 +++++
1 file changed, 5 insertions(+)

--- a/fs/orangefs/super.c
+++ b/fs/orangefs/super.c
@@ -559,6 +559,11 @@ void orangefs_kill_sb(struct super_block
/* 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

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