Patch "devpts: plug the memory leak in kill_sb" has been added to the 3.12-stable tree

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This is a note to let you know that I've just added the patch titled

    devpts: plug the memory leak in kill_sb

to the 3.12-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     devpts-plug-the-memory-leak-in-kill_sb.patch
and it can be found in the queue-3.12 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From 66da0e1f9034140ae2f571ef96e254a25083906c Mon Sep 17 00:00:00 2001
From: Ilija Hadzic <ihadzic@xxxxxxxxxxxxxxxxxxxxxx>
Date: Tue, 12 Nov 2013 15:11:45 -0800
Subject: devpts: plug the memory leak in kill_sb

From: Ilija Hadzic <ihadzic@xxxxxxxxxxxxxxxxxxxxxx>

commit 66da0e1f9034140ae2f571ef96e254a25083906c upstream.

When devpts is unmounted, there may be a no-longer-used IDR tree hanging
off the superblock we are about to kill.  This needs to be cleaned up
before destroying the SB.

The leak is usually not a big deal because unmounting devpts is typically
done when shutting down the whole machine.  However, shutting down an LXC
container instead of a physical machine exposes the problem (the garbage
is detectable with kmemleak).

Signed-off-by: Ilija Hadzic <ihadzic@xxxxxxxxxxxxxxxxxxxxxx>
Cc: Sukadev Bhattiprolu <sukadev@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
 fs/devpts/inode.c |    1 +
 1 file changed, 1 insertion(+)

--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -498,6 +498,7 @@ static void devpts_kill_sb(struct super_
 {
 	struct pts_fs_info *fsi = DEVPTS_SB(sb);
 
+	ida_destroy(&fsi->allocated_ptys);
 	kfree(fsi);
 	kill_litter_super(sb);
 }


Patches currently in stable-queue which might be from ihadzic@xxxxxxxxxxxxxxxxxxxxxx are

queue-3.12/devpts-plug-the-memory-leak-in-kill_sb.patch
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