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>

1 files changed, 2 insertions, 1 deletions

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);
 }