From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Wed, 13 Dec 2017 12:44:14 +0100
Subject: mm/slub: close possible memory-leak in kmem_cache_alloc_bulk()
Git-repo: git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git
Git-commit: 5022166d3b225bf5e343efb3ea01b3c5a41d69ba
Patch-mainline: Queued in subsystem maintainer repository
References: SLE Realtime Extension

Under certain circumstances we could leak elements which were moved to
the local "to_free" list. The damage is limited since I can't find
any users here.

Cc: stable-rt@vger.kernel.org
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Mike Galbraith <mgalbraith@suse.de>
---
 mm/slub.c |    1 +
 1 file changed, 1 insertion(+)

--- a/mm/slub.c
+++ b/mm/slub.c
@@ -3212,6 +3212,7 @@ int kmem_cache_alloc_bulk(struct kmem_ca
 	return i;
 error:
 	local_irq_enable();
+	free_delayed(&to_free);
 	slab_post_alloc_hook(s, flags, i, p);
 	__kmem_cache_free_bulk(s, i, p);
 	return 0;