Unverified Commit 55c0f40d authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!11700 x86/mm: Fix pti_clone_pgtable() alignment assumption 

Merge Pull Request from: @ci-robot 
 
PR sync from: Liu Shixin <liushixin2@huawei.com>
https://mailweb.openeuler.org/hyperkitty/list/kernel@openeuler.org/message/TQ6DOPXIIQJ5YVF6Q4PD6ZCUWAUA4H7X/ 
 
https://gitee.com/src-openeuler/kernel/issues/IAOXYY 
 
Link:https://gitee.com/openeuler/kernel/pulls/11700

 

Reviewed-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
Signed-off-by: default avatarZhang Changzhong <zhangchangzhong@huawei.com>
parents cae1b447 4dc77102

arch/x86/mm/pti.c

+3 −3
Original line number Diff line number Diff line
@@ -383,14 +383,14 @@ pti_clone_pgtable(unsigned long start, unsigned long end, 
			 */

			*target_pmd = *pmd;



			addr += PMD_SIZE;

			addr = round_up(addr + 1, PMD_SIZE);



		} else if (level == PTI_CLONE_PTE) {



			/* Walk the page-table down to the pte level */

			pte = pte_offset_kernel(pmd, addr);

			if (pte_none(*pte)) {

				addr += PAGE_SIZE;

				addr = round_up(addr + 1, PAGE_SIZE);

				continue;

			}
@@ -410,7 +410,7 @@ pti_clone_pgtable(unsigned long start, unsigned long end, 
			/* Clone the PTE */

			*target_pte = *pte;



			addr += PAGE_SIZE;

			addr = round_up(addr + 1, PAGE_SIZE);



		} else {

			BUG();