Re: [PATCH v4] x86/mce: Avoid infinite loop for copy from user recovery
From: Luck, Tony
Date: Fri Jan 15 2021 - 18:24:32 EST
On Fri, Jan 15, 2021 at 12:51:03PM -0800, Luck, Tony wrote:
> static void kill_me_now(struct callback_head *ch)
> {
> + p->mce_count = 0;
> force_sig(SIGBUS);
> }
Brown paper bag time ... I just pasted that line from kill_me_maybe()
and I thought I did a re-compile ... but obviously not since it gives
error: ‘p’ undeclared (first use in this function)
Option a) (just like kill_me_maybe)
struct task_struct *p = container_of(cb, struct task_struct, mce_kill_me);
Option b) (simpler ... not sure why PeterZ did the container_of thing
current->mce_count = 0;
-Tony