linux-kernel - Re: [PATCH 08/12] x86/dumpstack: Pin the target stack in save_stack_trace

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Date:   Wed, 14 Sep 2016 11:22:00 -0700
From:   Andy Lutomirski <luto@...capital.net>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     Andy Lutomirski <luto@...nel.org>, X86 ML <x86@...nel.org>,
        Borislav Petkov <bp@...en8.de>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Brian Gerst <brgerst@...il.com>, Jann Horn <jann@...jh.net>
Subject: Re: [PATCH 08/12] x86/dumpstack: Pin the target stack in save_stack_trace_tsk()

On Wed, Sep 14, 2016 at 7:55 AM, Josh Poimboeuf <jpoimboe@...hat.com> wrote:
> On Tue, Sep 13, 2016 at 02:29:28PM -0700, Andy Lutomirski wrote:
>> This will prevent a crash if the target task dies before or while
>> dumping its stack once we start freeing task stacks early.
>>
>> Signed-off-by: Andy Lutomirski <luto@...nel.org>
>
> Do we need a similar patch for show_stack()?

Probably.  Shouldn't it go in show_stack_log_lvl() instead, though?