linux-kernel - Re: KASAN: use-after-free Read in perf_trace_lock

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Message-ID: <CACT4Y+bwoqganUyk4bej8A9j1uNsw9Q+gk+FqcuB6mgP+9E1eQ@mail.gmail.com>
Date:   Tue, 31 Oct 2017 16:14:08 +0300
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     Peter Zijlstra <peterz@...radead.org>
Cc:     syzbot 
        <bot+eec541c6a1e7663177fcb48a5814c0a0776c9f68@...kaller.appspotmail.com>,
        dvhart@...radead.org, LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...hat.com>,
        syzkaller-bugs@...glegroups.com,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: KASAN: use-after-free Read in perf_trace_lock_acquire

On Tue, Oct 31, 2017 at 4:02 PM, Peter Zijlstra <peterz@...radead.org> wrote:
> On Tue, Oct 31, 2017 at 02:49:02PM +0300, Dmitry Vyukov wrote:
>> Peter, is this dup of "WARNING in get_pi_state"?
>> https://groups.google.com/d/msg/syzkaller-bugs/jpui-7LJvUw/b77s8UZiAgAJ
>
> Yep, same race, different outcome.

Let's tell the bot

#syz dup: WARNING in get_pi_state