在 2025/2/21 23:28, Oleg Nesterov 写道:
On 02/21, Tong Tiangen wrote:
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -506,6 +506,11 @@ 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;
+ }
I agree with David, the subject looks a bit misleading.
And. I won't insist, this is cosmetic, but if you send V2 please consider
moving the "verify_opcode()" check down, after the is_zero_page/PageCompound
checks.
Oleg.
OK, check the validity of the old page first and modify the subject in
v3 .
Thanks.
.