linux-kernel - Re: [syzbot] [tipc?] kernel BUG in __pskb_pull

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Message-ID: <CANn89i+Zm_0a5jqtsL5m-S4=E06mdQXA8RLaFEF75Y6umFWxpQ@mail.gmail.com>
Date: Fri, 13 Dec 2024 13:19:01 +0100
From: Eric Dumazet <edumazet@...gle.com>
To: syzbot <syzbot+4f66250f6663c0c1d67e@...kaller.appspotmail.com>
Cc: alsa-devel@...a-project.org, asml.silence@...il.com, axboe@...nel.dk, 
	clm@...com, davem@...emloft.net, dennis.dalessandro@...nelisnetworks.com, 
	dsterba@...e.com, eric.dumazet@...il.com, horms@...nel.org, 
	io-uring@...r.kernel.org, jasowang@...hat.com, jdamato@...tly.com, 
	jgg@...pe.ca, jmaloy@...hat.com, josef@...icpanda.com, kuba@...nel.org, 
	kvm@...r.kernel.org, leon@...nel.org, linux-block@...r.kernel.org, 
	linux-btrfs@...r.kernel.org, linux-fsdevel@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org, miklos@...redi.hu, 
	mst@...hat.com, netdev@...r.kernel.org, pabeni@...hat.com, 
	pbonzini@...hat.com, perex@...ex.cz, stable@...r.kernel.org, 
	stefanha@...hat.com, syzkaller-bugs@...glegroups.com, 
	tipc-discussion@...ts.sourceforge.net, tiwai@...e.com, 
	viro@...iv.linux.org.uk, virtualization@...ts.linux-foundation.org, 
	ying.xue@...driver.com
Subject: Re: [syzbot] [tipc?] kernel BUG in __pskb_pull_tail

On Fri, Dec 13, 2024 at 12:43 PM syzbot
<syzbot+4f66250f6663c0c1d67e@...kaller.appspotmail.com> wrote:
>
> syzbot has bisected this issue to:
>
> commit de4f5fed3f231a8ff4790bf52975f847b95b85ea
> Author: Jens Axboe <axboe@...nel.dk>
> Date:   Wed Mar 29 14:52:15 2023 +0000
>
>     iov_iter: add iter_iovec() helper
>
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=17424730580000
> start commit:   96b6fcc0ee41 Merge branch 'net-dsa-cleanup-eee-part-1'
> git tree:       net-next
> final oops:     https://syzkaller.appspot.com/x/report.txt?x=14c24730580000
> console output: https://syzkaller.appspot.com/x/log.txt?x=10c24730580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=1362a5aee630ff34
> dashboard link: https://syzkaller.appspot.com/bug?extid=4f66250f6663c0c1d67e
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=166944f8580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1287ecdf980000
>
> Reported-by: syzbot+4f66250f6663c0c1d67e@...kaller.appspotmail.com
> Fixes: de4f5fed3f23 ("iov_iter: add iter_iovec() helper")
>
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Great, thanks syzbot.

Patch is under review :

https://patchwork.kernel.org/project/netdevbpf/patch/20241212222247.724674-1-edumazet@google.com/