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Message-ID: <20210312162344.GB27820@redhat.com>
Date: Fri, 12 Mar 2021 17:23:45 +0100
From: Oleg Nesterov <oleg@...hat.com>
To: Qianli Zhao <zhaoqianligood@...il.com>
Cc: christian@...uner.io, axboe@...nel.dk, ebiederm@...ssion.com,
tglx@...utronix.de, pcc@...gle.com, linux-kernel@...r.kernel.org,
zhaoqianli@...omi.com
Subject: Re: [PATCH V2] exit: trigger panic when global init has exited
On 03/12, Qianli Zhao wrote:
>
> --- a/kernel/exit.c
> +++ b/kernel/exit.c
> @@ -767,6 +767,17 @@ void __noreturn do_exit(long code)
> validate_creds_for_do_exit(tsk);
>
> /*
> + * If global init has exited,
> + * panic immediately to get a useable coredump.
> + */
> + if (unlikely(is_global_init(tsk) &&
> + (thread_group_empty(tsk) ||
> + (tsk->signal->flags & SIGNAL_GROUP_EXIT)))) {
> + panic("Attempted to kill init! exitcode=0x%08x\n",
> + tsk->signal->group_exit_code ?: (int)code);
See our discussion with Eric, this is not right.
https://lore.kernel.org/lkml/20210310173236.GB8973@redhat.com/
Oleg.
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