netdev - Re: [syzbot] [afs?] general protection fault in skb_queue

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Date: Thu, 20 Jul 2023 16:22:34 +0300
From: Fedor Pchelkin <pchelkin@...ras.ru>
To: syzbot <syzbot+160a7250e255d25725eb@...kaller.appspotmail.com>
Cc: kvalo@...nel.org, linux-kernel@...r.kernel.org, 
	linux-wireless@...r.kernel.org, netdev@...r.kernel.org, syzkaller-bugs@...glegroups.com, 
	toke@...e.dk, Alexey Khoroshilov <khoroshilov@...ras.ru>, 
	lvc-project@...uxtesting.org
Subject: Re: [syzbot] [afs?] general protection fault in skb_queue_tail (3)

On 23/07/15 12:22AM, syzbot wrote:
> syzbot suspects this issue was fixed by commit:
> 
> commit 061b0cb9327b80d7a0f63a33e7c3e2a91a71f142
> Author: Fedor Pchelkin <pchelkin@...ras.ru>
> Date:   Wed May 17 15:03:17 2023 +0000
> 
>     wifi: ath9k: don't allow to overwrite ENDPOINT0 attributes
> 
> bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=12253b7ca80000
> start commit:   98555239e4c3 Merge tag 'arc-6.1-fixes' of git://git.kernel..
> git tree:       upstream
> kernel config:  https://syzkaller.appspot.com/x/.config?x=701f2aae1cb0470e
> dashboard link: https://syzkaller.appspot.com/bug?extid=160a7250e255d25725eb
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1482f0b6880000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=119e4dce880000
> 
> If the result looks correct, please mark the issue as fixed by replying with:
> 
> #syz fix: wifi: ath9k: don't allow to overwrite ENDPOINT0 attributes
> 
> For information about bisection process see: https://goo.gl/tpsmEJ#bisection

Seems reasonable since the reproducer here manages to modify ENDPOINT0
attrs and this leads to the invalid behaviour in different ways - the one
is this bug and another is the one fixed by the commit which syzbot
bisected. Those attempts to modify ENDPOINT0 are now prohibited with this
commit. So I think the result is correct (apart from that this issue is
not related to afs).

#syz fix: wifi: ath9k: don't allow to overwrite ENDPOINT0 attributes