devpts: Make devpts_kill_sb safe if fsi is NULL

Signed-off-by: "Eric W. Biederman" <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
dzndl · Sep 23, 2016 · 40b320e · 40b320e
1 parent c1b241f
commit 40b320e
Showing 1 changed file with 2 additions and 1 deletion.
diff --git 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);
 }