linux-kernel - Re: general protection fault in perf_misc

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Message-ID: <20200926112119.GA22089@zn.tnic>
Date:   Sat, 26 Sep 2020 13:21:19 +0200
From:   Borislav Petkov <bp@...en8.de>
To:     Dmitry Vyukov <dvyukov@...gle.com>
Cc:     Nick Desaulniers <ndesaulniers@...gle.com>,
        Josh Poimboeuf <jpoimboe@...hat.com>,
        syzbot <syzbot+ce179bc99e64377c24bc@...kaller.appspotmail.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        "H. Peter Anvin" <hpa@...or.com>, Jiri Olsa <jolsa@...hat.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>,
        Ingo Molnar <mingo@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        syzkaller-bugs <syzkaller-bugs@...glegroups.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        the arch/x86 maintainers <x86@...nel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: general protection fault in perf_misc_flags

On Wed, Sep 23, 2020 at 05:20:06PM +0200, Dmitry Vyukov wrote:
> It's a random fuzzing workload. You can get this workload by running
> syzkaller locally:
> https://github.com/google/syzkaller/blob/master/docs/linux/setup_ubuntu-host_qemu-vm_x86-64-kernel.md

Yeah, the my.cfg example suggests that the syz-manager starts the guest
and supplies the kernel, etc.

Is there a possibility to run the workload in an already existing guest
which I've booted prior?

I'm asking because I have all the infra for testing kernels in guests
already setup here and it would be easier for me to simply run the
workload directly in the guest and then poke at it.

Thx.

-- 
Regards/Gruss,
    Boris.

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