Hi,
The NODEMASK_ALLOC macro dynamically allocates 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.
Signed-off-by: Jesper Juhl <jj@xxxxxxxxxxxxx>
---
hugetlb.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
compile tested only
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 8585524..9fdcc35 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -1439,8 +1439,10 @@ 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) {
+ kfree(nodes_allowed);
return 0;
+ }
h = kobj_to_hstate(kobj, &nid);
if (nid == NUMA_NO_NODE) {
--
Jesper Juhl <jj@xxxxxxxxxxxxx> http://www.chaosbits.net/
Don't top-post http://www.catb.org/~esr/jargon/html/T/top-post.html
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