Unverified Commit db1a76ce authored Apr 03, 2025 by openeuler-ci-bot Committed by Gitee Apr 03, 2025

!15760 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/BAR2ECDNCAC5HYMPQ53ZI6JNCBHH3DL7/ 
 
https://gitee.com/src-openeuler/kernel/issues/IBWVTY 
 
Link:https://gitee.com/openeuler/kernel/pulls/15760

 

Reviewed-by: Li Nan <linan122@huawei.com>
Reviewed-by: Ye Weihua <yeweihua4@huawei.com>
Signed-off-by: Li Nan <linan122@huawei.com>

parents 99e8874a 888374a0

kernel/events/uprobes.c

+5 −0

Original line number	Diff line number	Diff line
		@@ -488,6 +488,11 @@ int uprobe_write_opcode(struct arch_uprobe auprobe, struct mm_struct mm,
		if (ret <= 0)
		goto put_old;

		if (is_zero_pfn(page_to_pfn(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;