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From:   Dmitry Vyukov <dvyukov@google.com>
Date:   Mon, 14 Nov 2022 21:15:51 +0100
Message-ID: <CACT4Y+ZqTQ1gy7Vu8Hsy8tmXa+EC43jYaNxG40biNy3d-rmMmg@mail.gmail.com>
Subject: Re: [syzbot] BUG: unable to handle kernel NULL pointer dereference in smack_inode_permission
To:     Richard Cochran <richardcochran@gmail.com>,
        syzkaller <syzkaller@googlegroups.com>
Cc:     syzbot <syzbot+0f89bd13eaceccc0e126@syzkaller.appspotmail.com>,
        casey@schaufler-ca.com, jmorris@namei.org,
        linux-kernel@vger.kernel.org,
        linux-security-module@vger.kernel.org, netdev@vger.kernel.org,
        paul@paul-moore.com, serge@hallyn.com,
        syzkaller-bugs@googlegroups.com
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On Mon, 14 Nov 2022 at 20:20, Richard Cochran <richardcochran@gmail.com> wrote:
>
> On Sun, Nov 13, 2022 at 04:05:47PM -0800, syzbot wrote:
> > Hello,
> >
> > syzbot found the following issue on:
> >
> > HEAD commit:    56751c56c2a2 Merge branch 'for-next/fixes' into for-kernelci
> > git tree:       git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci
> > console output: https://syzkaller.appspot.com/x/log.txt?x=11fc8b0e880000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=606e57fd25c5c6cc
> > dashboard link: https://syzkaller.appspot.com/bug?extid=0f89bd13eaceccc0e126
> > compiler:       Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2
> > userspace arch: arm64
> > syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10a691fa880000
> > C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1733c5b9880000
> >
> > Downloadable assets:
> > disk image: https://storage.googleapis.com/syzbot-assets/cf4668c75dea/disk-56751c56.raw.xz
> > vmlinux: https://storage.googleapis.com/syzbot-assets/e1ef82e91ef7/vmlinux-56751c56.xz
> > kernel image: https://storage.googleapis.com/syzbot-assets/3dabe076170f/Image-56751c56.gz.xz
> >
> > IMPORTANT: if you fix the issue, please add the following tag to the commit:
> > Reported-by: syzbot+0f89bd13eaceccc0e126@syzkaller.appspotmail.com
>
> Why was this email addressed to me?

Hi Richard,

You are listed as maintainer for the file this crash was attributed to:

$ ./scripts/get_maintainer.pl -f security/smack/smack_lsm.c
...
Richard Cochran <richardcochran@gmail.com> (maintainer:PTP HARDWARE
CLOCK SUPPORT)
...

Also see:
https://lore.kernel.org/all/Y279BqPNYAr+5OxC@sol.localdomain/