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From:   Aleksandr Nogikh <nogikh@google.com>
Date:   Tue, 16 May 2023 19:23:30 +0200
Message-ID: <CANp29Y7ktmz=W5F+uavDa1KzSnUnBHtrH2abHRqAjuWZkJdgxw@mail.gmail.com>
Subject: Re: [syzbot] [kernel?] Internal error in should_fail_ex
To:     Christian Brauner <brauner@kernel.org>
Cc:     syzbot <syzbot+c84b326736ee471158dc@syzkaller.appspotmail.com>,
        syzbot <syzbot+729f1325904c82acd601@syzkaller.appspotmail.com>,
        bpf@vger.kernel.org, linux-kernel@vger.kernel.org,
        syzkaller-bugs@googlegroups.com
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On Tue, May 16, 2023 at 2:32=E2=80=AFPM Christian Brauner <brauner@kernel.o=
rg> wrote:
>
> On Tue, May 16, 2023 at 03:35:03AM -0700, syzbot wrote:
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit:    457391b03803 Linux 6.3
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=3D15671fa2280=
000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=3D385e197a58c=
a4afe
> > dashboard link: https://syzkaller.appspot.com/bug?extid=3Dc84b326736ee4=
71158dc
> > compiler:       arm-linux-gnueabi-gcc (Debian 10.2.1-6) 10.2.1 20210110=
, GNU ld (GNU Binutils for Debian) 2.35.2
> > userspace arch: arm
> >
> > Unfortunately, I don't have any reproducer for this issue yet.
> >
> > Downloadable assets:
> > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets=
/c35b5b2731d2/non_bootable_disk-457391b0.raw.xz
> > vmlinux: https://storage.googleapis.com/syzbot-assets/2a1bf3bafeb6/vmli=
nux-457391b0.xz
> > kernel image: https://storage.googleapis.com/syzbot-assets/21f1e3b4a5a9=
/zImage-457391b0.xz
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the co=
mmit:
> > Reported-by: syzbot+c84b326736ee471158dc@syzkaller.appspotmail.com
>
> On Tue, May 16, 2023 at 03:35:02AM -0700, syzbot wrote:
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit:    457391b03803 Linux 6.3
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=3D134e0b01280=
000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=3D385e197a58c=
a4afe
> > dashboard link: https://syzkaller.appspot.com/bug?extid=3D729f1325904c8=
2acd601
> > compiler:       arm-linux-gnueabi-gcc (Debian 10.2.1-6) 10.2.1 20210110=
, GNU ld (GNU Binutils for Debian) 2.35.2
> > userspace arch: arm
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=3D118f964e2=
80000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=3D16f6e776280=
000
> >
> > Downloadable assets:
> > disk image (non-bootable): https://storage.googleapis.com/syzbot-assets=
/c35b5b2731d2/non_bootable_disk-457391b0.raw.xz
> > vmlinux: https://storage.googleapis.com/syzbot-assets/2a1bf3bafeb6/vmli=
nux-457391b0.xz
> > kernel image: https://storage.googleapis.com/syzbot-assets/21f1e3b4a5a9=
/zImage-457391b0.xz
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the co=
mmit:
> > Reported-by: syzbot+729f1325904c82acd601@syzkaller.appspotmail.com
>
> Not complaining but why am I blessed with an explicit Cc on this?
>

You were Cc'd because syzbot incorrectly identified the guilty file
for the bug, I've sent a fix [1].
Sorry for the noise.

[1] https://github.com/google/syzkaller/pull/3905

--=20
Aleksandr