linux-kernel - Re: [syzbot] WARNING in emulate

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Message-ID: <CACT4Y+ZdfLfUENLBoxn8RAXX7pDqy03X4m_gvkQ06265agJGqg@mail.gmail.com>
Date:   Thu, 28 Oct 2021 15:01:11 +0200
From:   Dmitry Vyukov <dvyukov@...gle.com>
To:     syzbot <syzbot+2698183e871d8a137f9d@...kaller.appspotmail.com>
Cc:     bp@...en8.de, bp@...e.de, dave.hansen@...ux.intel.com,
        hpa@...or.com, keescook@...omium.org, krisman@...labora.com,
        liangjs@....edu.cn, linux-kernel@...r.kernel.org, luto@...nel.org,
        mingo@...hat.com, peterz@...radead.org,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de,
        wad@...omium.org, x86@...nel.org
Subject: Re: [syzbot] WARNING in emulate_vsyscall

On Wed, 27 Oct 2021 at 06:20, syzbot
<syzbot+2698183e871d8a137f9d@...kaller.appspotmail.com> wrote:
>
> syzbot suspects this issue was fixed by commit:
>
> commit d4ffd5df9d18031b6a53f934388726775b4452d3
> Author: Jiashuo Liang <liangjs@....edu.cn>
> Date:   Fri Jul 30 03:01:52 2021 +0000
>
>     x86/fault: Fix wrong signal when vsyscall fails with pkey
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=11bb466f300000
> start commit:   009c9aa5be65 Linux 5.13-rc6
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=7ca96a2d153c74b0
> dashboard link: https://syzkaller.appspot.com/bug?extid=2698183e871d8a137f9d
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10e1a704300000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=125a92d0300000
>
> If the result looks correct, please mark the issue as fixed by replying with:
>
> #syz fix: x86/fault: Fix wrong signal when vsyscall fails with pkey
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Looks plausible:

#syz fix: x86/fault: Fix wrong signal when vsyscall fails with pkey