From: Eric W. Biederman <ebiederm@xmission.com>
Date: Tue, 22 Dec 2015 23:39:18 +0000 (-0600)
Subject: devpts: Make devpts_kill_sb safe if fsi is NULL
X-Git-Tag: v4.9-rc1~111^2~7
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=0d126a7ff77a02e88b6bf37a726abf8990226bf4;p=linux.git

devpts: Make devpts_kill_sb safe if fsi is NULL

Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
---

diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index 5e216749bd96..2b0f24cb7d54 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);
 }