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Message-ID: <65dd075bc6cbd_20e0a20892@john.notmuch>
Date: Mon, 26 Feb 2024 13:49:15 -0800
From: John Fastabend <john.fastabend@...il.com>
To: syzbot <syzbot+8cd36f6b65f3cafd400a@...kaller.appspotmail.com>,
andrii@...nel.org,
ast@...nel.org,
bpf@...r.kernel.org,
daniel@...earbox.net,
davem@...emloft.net,
haoluo@...gle.com,
hawk@...nel.org,
john.fastabend@...il.com,
jolsa@...nel.org,
kpsingh@...nel.org,
kuba@...nel.org,
linux-kernel@...r.kernel.org,
martin.lau@...ux.dev,
netdev@...r.kernel.org,
sdf@...gle.com,
song@...nel.org,
syzkaller-bugs@...glegroups.com,
yonghong.song@...ux.dev
Subject: Re: [syzbot] [bpf?] [net?] BUG: unable to handle kernel NULL pointer
dereference in dev_map_hash_update_elem
syzbot wrote:
> syzbot has found a reproducer for the following issue on:
>
> HEAD commit: 70ff1fe626a1 Merge tag 'docs-6.8-fixes3' of git://git.lwn...
> git tree: upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=1762045c180000
> kernel config: https://syzkaller.appspot.com/x/.config?x=4cf52b43f46d820d
> dashboard link: https://syzkaller.appspot.com/bug?extid=8cd36f6b65f3cafd400a
> compiler: arm-linux-gnueabi-gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
> userspace arch: arm
> syz repro: https://syzkaller.appspot.com/x/repro.syz?x=110cf122180000
> C reproducer: https://syzkaller.appspot.com/x/repro.c?x=142f6d8c180000
>
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/8ead8862021c/non_bootable_disk-70ff1fe6.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/bc398db9fd8c/vmlinux-70ff1fe6.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/6d3f8b72a671/zImage-70ff1fe6.xz
>
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+8cd36f6b65f3cafd400a@...kaller.appspotmail.com
>
I'll take a look this week if no one beats me to it. Looks like there is
a reproducer so should be able to sort it out.
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