tree 62427ca91992c87399211fec6294533fac0e7464
parent 29c1f677d424e8c5683a837fc4f03fc9f19201d7
author Jesper Juhl <jj@chaosbits.net> 1294962442 -0800
committer Linus Torvalds <torvalds@linux-foundation.org> 1294968768 -0800

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>