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

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Message-ID: <20250207111932.55e9d377@kmaincent-XPS-13-7390>
Date: Fri, 7 Feb 2025 11:19:32 +0100
From: Kory Maincent <kory.maincent@...tlin.com>
To: Jakub Kicinski <kuba@...nel.org>
Cc: syzbot <syzbot+86a8ab09a0f655f1ff19@...kaller.appspotmail.com>,
 davem@...emloft.net, edumazet@...gle.com, horms@...nel.org,
 linux-kernel@...r.kernel.org, netdev@...r.kernel.org, pabeni@...hat.com,
 syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [net?] general protection fault in
 generic_hwtstamp_ioctl_lower (2)

On Thu, 6 Feb 2025 17:56:18 -0800
Jakub Kicinski <kuba@...nel.org> wrote:

> On Tue, 04 Feb 2025 07:22:16 -0800 syzbot wrote:
> > Hello,
> > 
> > syzbot found the following issue on:
> > 
> > HEAD commit:    69e858e0b8b2 Merge tag 'uml-for-linus-6.14-rc1' of git://g..
> > git tree:       upstream
> > console output: https://syzkaller.appspot.com/x/log.txt?x=13324b24580000
> > kernel config:  https://syzkaller.appspot.com/x/.config?x=98d83cc1742b7377
> > dashboard link: https://syzkaller.appspot.com/bug?extid=86a8ab09a0f655f1ff19
> > compiler:       gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for
> > Debian) 2.40 syz repro:
> > https://syzkaller.appspot.com/x/repro.syz?x=17324b24580000 C reproducer:
> > https://syzkaller.appspot.com/x/repro.c?x=161595f8580000  
> 
> Hi Kory!
> 
> Looks like syzbot wasn't able to bisect and didn't CC you.
> Please take a look, looks like struct kernel_hwtstamp_config
> gets into the ioctl paths.

Hello Jakub,

Thanks for transferring it to me. I will look at it.

Regards,
-- 
Köry Maincent, Bootlin
Embedded Linux and kernel engineering
https://bootlin.com