mm/hugetlb.c: fix error-path memory leak in nr_hugepages_store_common()
authorJesper Juhl <jj@chaosbits.net>
Thu, 13 Jan 2011 23:47:22 +0000 (15:47 -0800)
committerLinus Torvalds <torvalds@linux-foundation.org>
Fri, 14 Jan 2011 01:32:48 +0000 (17:32 -0800)
commit32d6feadf4e17ea9b98071be9bbf402a74a4f818
tree62427ca91992c87399211fec6294533fac0e7464
parent29c1f677d424e8c5683a837fc4f03fc9f19201d7
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>
mm/hugetlb.c