linux-kernel - Re: [syzbot] [net?] [bpf?] general protection fault in dev_map

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Message-ID: <20240702114026.1e1f72b7@kernel.org>
Date: Tue, 2 Jul 2024 11:40:26 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: syzbot <syzbot+08811615f0e17bc6708b@...kaller.appspotmail.com>,
 andrii@...nel.org, ast@...nel.org, bpf@...r.kernel.org,
 daniel@...earbox.net, davem@...emloft.net, eddyz87@...il.com,
 haoluo@...gle.com, hawk@...nel.org, john.fastabend@...il.com,
 jolsa@...nel.org, kpsingh@...nel.org, linux-kernel@...r.kernel.org,
 martin.lau@...ux.dev, netdev@...r.kernel.org, sdf@...ichev.me,
 song@...nel.org, syzkaller-bugs@...glegroups.com, yonghong.song@...ux.dev
Subject: Re: [syzbot] [net?] [bpf?] general protection fault in
 dev_map_redirect

On Mon, 01 Jul 2024 13:19:15 -0700 syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    74564adfd352 Add linux-next specific files for 20240701
> git tree:       linux-next
> console output: https://syzkaller.appspot.com/x/log.txt?x=12e5b0e1980000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=111e4e0e6fbde8f0
> dashboard link: https://syzkaller.appspot.com/bug?extid=08811615f0e17bc6708b
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> 
> Unfortunately, I don't have any reproducer for this issue yet.

Hi Sebastian!

We have a few of these:

https://lore.kernel.org/all/0000000000008f77c2061c357383@google.com/
https://lore.kernel.org/all/00000000000079d168061c36ce83@google.com/
https://lore.kernel.org/all/000000000000357ea9061c384d6d@google.com/

tun's local XDP and XDP generic also need to be covered.