On 2013/9/19 16:33, Petr Holasek wrote: > On Mon, 16 Sep 2013, Jianguo Wu wrote: >> In get_mergeable_page() local variable page is not initialized, >> it may hold a garbage value, when find_mergeable_vma() return NULL, >> get_mergeable_page() may return a garbage value to the caller. >> >> So initialize page as NULL. >> >> Signed-off-by: Jianguo Wu <wujianguo@xxxxxxxxxx> >> --- >> mm/ksm.c | 2 +- >> 1 files changed, 1 insertions(+), 1 deletions(-) >> >> diff --git a/mm/ksm.c b/mm/ksm.c >> index b6afe0c..87efbae 100644 >> --- a/mm/ksm.c >> +++ b/mm/ksm.c >> @@ -460,7 +460,7 @@ static struct page *get_mergeable_page(struct rmap_item *rmap_item) >> struct mm_struct *mm = rmap_item->mm; >> unsigned long addr = rmap_item->address; >> struct vm_area_struct *vma; >> - struct page *page; >> + struct page *page = NULL; >> >> down_read(&mm->mmap_sem); >> vma = find_mergeable_vma(mm, addr); >> -- >> 1.7.1 >> > > When find_mergeable_vma returned NULL, NULL is assigned to page in "out" > statement. > Oh, yes, thanks, Petr. > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>