Unverified Commit 8585cfc0 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!9858 khugepaged: fix null-pointer dereference due to race 

Merge Pull Request from: @ci-robot 
 
PR sync from: Liu Shixin <liushixin2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/546YAS7FT4HYQRMH2PPSSEX3DC3AQAIM/ 
 
https://gitee.com/openeuler/kernel/issues/IABZNI 
 
Link:https://gitee.com/openeuler/kernel/pulls/9858

 

Reviewed-by: default avatarKefeng Wang <wangkefeng.wang@huawei.com>
Reviewed-by: default avatarLiu YongQiang <liuyongqiang13@huawei.com>
Signed-off-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
parents 1c3019c5 f50350a6

mm/khugepaged.c

+3 −0
Original line number Diff line number Diff line
@@ -893,6 +893,9 @@ static int hugepage_vma_revalidate(struct mm_struct *mm, unsigned long address, 
		return SCAN_ADDRESS_RANGE;

	if (!hugepage_vma_check(vma, vma->vm_flags))

		return SCAN_VMA_CHECK;

	/* Anon VMA expected */

	if (!vma->anon_vma || vma->vm_ops)

		return SCAN_VMA_CHECK;

	return 0;

}