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| author | Jesper Juhl <jj@chaosbits.net> | 2011-01-14 00:47:22 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-01-14 02:32:48 +0100 |
| commit | 32d6feadf4e17ea9b98071be9bbf402a74a4f818 (patch) | |
| tree | 62427ca91992c87399211fec6294533fac0e7464 /mm/hugetlb.c | |
| parent | mm: migration: use rcu_dereference_protected when dereferencing the radix tre... (diff) | |
| download | linux-32d6feadf4e17ea9b98071be9bbf402a74a4f818.tar.xz linux-32d6feadf4e17ea9b98071be9bbf402a74a4f818.zip | |
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>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 7bf223d6677b..8e31cda6fc22 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1374,8 +1374,10 @@ static ssize_t nr_hugepages_store_common(bool obey_mempolicy, NODEMASK_ALLOC(nodemask_t, nodes_allowed, GFP_KERNEL | __GFP_NORETRY); err = strict_strtoul(buf, 10, &count); - if (err) + if (err) { + NODEMASK_FREE(nodes_allowed); return 0; + } h = kobj_to_hstate(kobj, &nid); if (nid == NUMA_NO_NODE) { |