From: Eric W. Biederman <ebiederm@xmission.com>
Date: Wed, 14 Sep 2016 18:53:36 +0000 (-0500)
Subject: devpts: Make devpts_kill_sb safe if fsi is NULL
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=40b320e1c757353d65550471132683dfb6c35e0f;p=linux-beck.git

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>
---

diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index a48b40b0bd1e..e058ec677207 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -458,7 +458,8 @@ static void devpts_kill_sb(struct super_block *sb)
 {
 	struct pts_fs_info *fsi = DEVPTS_SB(sb);
 
-	ida_destroy(&fsi->allocated_ptys);
+	if (fsi)
+		ida_destroy(&fsi->allocated_ptys);
 	kfree(fsi);
 	kill_litter_super(sb);
 }