mm/mremap.c: call pud_free() after fail calling pmd_alloc()
In alloc_new_pmd(), if pud_alloc() was called successfully, but
pmd_alloc() fails, avoid leaking `pud'.
Signed-off-by: Chen Gang <gang.chen@asianux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/mm/mremap.c b/mm/mremap.c
index 0843feb..91b13d6 100644
--- a/mm/mremap.c
+++ b/mm/mremap.c
@@ -25,6 +25,7 @@
#include <asm/uaccess.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
+#include <asm/pgalloc.h>
#include "internal.h"
@@ -62,8 +63,10 @@
return NULL;
pmd = pmd_alloc(mm, pud, addr);
- if (!pmd)
+ if (!pmd) {
+ pud_free(mm, pud);
return NULL;
+ }
VM_BUG_ON(pmd_trans_huge(*pmd));