Unverified Commit a151658a authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!10823 mm/userfaultfd: reset ptes when close() for wr-protected ones 

Merge Pull Request from: @ci-robot 
 
PR sync from: Liu Shixin <liushixin2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/LVSQ3SYCUTFNBX2QLTQENJLUY4OGYC3Z/ 
 
https://gitee.com/src-openeuler/kernel/issues/I9UOJV 
 
Link:https://gitee.com/openeuler/kernel/pulls/10823

 

Reviewed-by: default avatarZhang Peng <zhangpeng362@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents c5465245 92cde6a9

fs/userfaultfd.c

+4 −0
Original line number Diff line number Diff line
@@ -939,6 +939,10 @@ static int userfaultfd_release(struct inode *inode, struct file *file) 
			prev = vma;

			continue;

		}

		/* Reset ptes for the whole vma range if wr-protected */

		if (userfaultfd_wp(vma))

			uffd_wp_range(vma, vma->vm_start,

				      vma->vm_end - vma->vm_start, false);

		new_flags = vma->vm_flags & ~(__VM_UFFD_FLAGS | VM_USWAP);

		prev = vma_merge(&vmi, mm, prev, vma->vm_start, vma->vm_end,

				 new_flags, vma->anon_vma,