releases/4.16.4/orangefs_kill_sb-deal-with-allocation-failures.patch

   1 From 659038428cb43a66e3eff71e2c845c9de3611a98 Mon Sep 17 00:00:00 2001
   2 From: Al Viro <viro@zeniv.linux.org.uk>
   3 Date: Tue, 3 Apr 2018 00:13:17 -0400
   4 Subject: orangefs_kill_sb(): deal with allocation failures
   5
   6 From: Al Viro <viro@zeniv.linux.org.uk>
   7
   8 commit 659038428cb43a66e3eff71e2c845c9de3611a98 upstream.
   9
  10 orangefs_fill_sb() might've failed to allocate ORANGEFS_SB(s); don't
  11 oops in that case.
  12
  13 Cc: stable@kernel.org
  14 Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
  15 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
  16
  17 ---
  18  fs/orangefs/super.c |    5 +++++
  19  1 file changed, 5 insertions(+)
  20
  21 --- a/fs/orangefs/super.c
  22 +++ b/fs/orangefs/super.c
  23 @@ -579,6 +579,11 @@ void orangefs_kill_sb(struct super_block
  24         /* provided sb cleanup */
  25         kill_anon_super(sb);
  26
  27 +       if (!ORANGEFS_SB(sb)) {
  28 +               mutex_lock(&orangefs_request_mutex);
  29 +               mutex_unlock(&orangefs_request_mutex);
  30 +               return;
  31 +       }
  32         /*
  33          * issue the unmount to userspace to tell it to remove the
  34          * dynamic mount info it has for this superblock