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authorHillf Danton <dhillf@gmail.com>2011-11-15 14:36:12 -0800
committerGreg Kroah-Hartman <gregkh@suse.de>2011-12-09 08:52:37 -0800
commitd98627dd4a3e2cd4a7602a845fd1c1c78d372e97 (patch)
tree8ec13bb0c0c05ad7da6659bf91098bf1a197c5c1
parentbfc769031803ed194374d4e79d30e6ee103d822e (diff)
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hugetlb: release pages in the error path of hugetlb_cow()
commit ea4039a34c4c206d015d34a49d0b00868e37db1d upstream. 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> Cc: Michal Hocko <mhocko@suse.cz> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
-rw-r--r--mm/hugetlb.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index bfcf153bc82..2b57cd96dd5 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2415,6 +2415,8 @@ 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;