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authorHillf Danton <dhillf@gmail.com>2011-11-15 14:36:12 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2011-11-15 22:41:52 -0200
commitea4039a34c4c206d015d34a49d0b00868e37db1d (patch)
tree1c7c38a83e0765f717f11079c573bb94f7445b77 /mm
parent66e13e66b6c4e5b2ecd6225e1f8437640cfb6498 (diff)
downloadlwn-ea4039a34c4c206d015d34a49d0b00868e37db1d.tar.gz
lwn-ea4039a34c4c206d015d34a49d0b00868e37db1d.zip
hugetlb: release pages in the error path of hugetlb_cow()
If we fail to prepare an anon_vma, the {new, old}_page should be released, or they will leak. Signed-off-by: Hillf Danton <dhillf@gmail.com> Reviewed-by: Andrea Arcangeli <aarcange@redhat.com> Cc: Hugh Dickins <hughd@google.com> Cc: Johannes Weiner <jweiner@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
-rw-r--r--mm/hugetlb.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index dae27ba3be2c..bb28a5f9db8d 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2422,6 +2422,8 @@ retry_avoidcopy:
* anon_vma prepared.
*/
if (unlikely(anon_vma_prepare(vma))) {
+ page_cache_release(new_page);
+ page_cache_release(old_page);
/* Caller expects lock to be held */
spin_lock(&mm->page_table_lock);
return VM_FAULT_OOM;