Unverified Commit 7b875ea7 authored by openeuler-ci-bot's avatar openeuler-ci-bot Committed by Gitee
Browse files

!15743 uprobes: Reject the shared zeropage in uprobe_write_opcode() 

Merge Pull Request from: @ci-robot 
 
PR sync from: Chen Zhongjin <chenzhongjin@huawei.com>
https://mailweb.openeuler.org/archives/list/kernel@openeuler.org/message/DMPGVD5QIRCFDNRPWUQWXWBNIHYESN63/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBWVTY 
 
Link:https://gitee.com/openeuler/kernel/pulls/15743

 

Reviewed-by: default avatarYe Weihua <yeweihua4@huawei.com>
Signed-off-by: default avatarZhang Peng <zhangpeng362@huawei.com>
parents 7ddc52ba 58b000b7

kernel/events/uprobes.c

+5 −0
Original line number Diff line number Diff line
@@ -483,6 +483,11 @@ int uprobe_write_opcode(struct arch_uprobe *auprobe, struct mm_struct *mm, 
	if (ret <= 0)

		goto put_old;



	if (is_zero_page(old_page)) {

		ret = -EINVAL;

		goto put_old;

	}



	if (WARN(!is_register && PageCompound(old_page),

		 "uprobe unregister should never work on compound page\n")) {

		ret = -EINVAL;