linux-kernel - Re: Syzkaller found a bug: KASAN: use-after-free Write in put_pmu

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Message-ID: <Y6S76ZqA/CX8Vx82@hirez.programming.kicks-ass.net>
Date:   Thu, 22 Dec 2022 21:19:53 +0100
From:   Peter Zijlstra <peterz@...radead.org>
To:     Alexander Potapenko <glider@...gle.com>
Cc:     Sanan Hasanov <sanan.hasanov@...ghts.ucf.edu>,
        "mingo@...hat.com" <mingo@...hat.com>,
        "will@...nel.org" <will@...nel.org>,
        "longman@...hat.com" <longman@...hat.com>,
        "boqun.feng@...il.com" <boqun.feng@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "contact@...zz.com" <contact@...zz.com>,
        Paul Gazzillo <Paul.Gazzillo@....edu>,
        "syzkaller@...glegroups.com" <syzkaller@...glegroups.com>
Subject: Re: Syzkaller found a bug: KASAN: use-after-free Write in put_pmu_ctx

On Thu, Dec 22, 2022 at 07:11:38PM +0100, Alexander Potapenko wrote:
> On Thu, Dec 22, 2022 at 6:40 PM Sanan Hasanov
> <sanan.hasanov@...ghts.ucf.edu> wrote:
> >
> > Good day, dear maintainers,
> 
> Hi Sanan,
> 
> > Config file: https://drive.google.com/file/d/1JutR21cgcf28flJVyLqDniNyrExMsSn_/view?usp=sharing
> >
> > Reproducer file: https://drive.google.com/file/d/1X31x8w4ULrtP_YnkD7_RCyW7FlwGewMR/view?usp=sharing
> 
> Any chance you can build with debug info enabled (CONFIG_DEBUG_INFO=y)?
> Then you'll be able to generate file:line information for the report
> (probably your syzkaller instance will do that for you, otherwise you
> can always use scripts/decode_stacktrace.sh)

Ok use Google before posting....

 https://lkml.kernel.org/r/000000000000a20a2e05f029c577@google.com