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devpts: Make devpts_kill_sb safe if fsi is NULL 

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Eric W. Biederman 2016-09-14 13:53:36 -05:00 committed by Greg Kroah-Hartman
parent c1b241f0c1
commit 40b320e1c7
1 changed files with 2 additions and 1 deletions
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1
fs/devpts/inode.c
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@ -458,6 +458,7 @@ static void devpts_kill_sb(struct super_block *sb)
{ {
struct pts_fs_info *fsi = DEVPTS_SB(sb); struct pts_fs_info *fsi = DEVPTS_SB(sb);
if (fsi)
ida_destroy(&fsi->allocated_ptys); ida_destroy(&fsi->allocated_ptys);
kfree(fsi); kfree(fsi);
kill_litter_super(sb); kill_litter_super(sb);