From 32d6feadf4e17ea9b98071be9bbf402a74a4f818 Mon Sep 17 00:00:00 2001
From: Jesper Juhl <jj@chaosbits.net>
Date: Thu, 13 Jan 2011 15:47:22 -0800
Subject: [PATCH] mm/hugetlb.c: fix error-path memory leak in
 nr_hugepages_store_common()

The NODEMASK_ALLOC macro may dynamically allocate memory for its second
argument ('nodes_allowed' in this context).

In nr_hugepages_store_common() we may abort early if strict_strtoul()
fails, but in that case we do not free the memory already allocated to
'nodes_allowed', causing a memory leak.

This patch closes the leak by freeing the memory in the error path.

[akpm@linux-foundation.org: use NODEMASK_FREE, per Minchan Kim]
Signed-off-by: Jesper Juhl <jj@chaosbits.net>
Cc: Minchan Kim <minchan.kim@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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