Commit 1ecfd533 authored Sep 11, 2013 by Chen Gang Committed by Linus Torvalds Sep 11, 2013

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>

parent 762216ab

mm/mremap.c

+4 −1

Original line number	Diff line number	Diff line
		@@ -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 @@ static pmd_t alloc_new_pmd(struct mm_struct mm, struct vm_area_struct *vma,
		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));