netdev - Re: [syzbot] [can?] WARNING in ucan

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Message-ID: <20250217-spectral-cordial-booby-968731-mkl@pengutronix.de>
Date: Mon, 17 Feb 2025 13:57:06 +0100
From: Marc Kleine-Budde <mkl@...gutronix.de>
To: syzbot <syzbot+d7d8c418e8317899e88c@...kaller.appspotmail.com>
Cc: davem@...emloft.net, edumazet@...gle.com, gregkh@...uxfoundation.org, 
	kuba@...nel.org, linux-can@...r.kernel.org, linux-kernel@...r.kernel.org, 
	mailhol.vincent@...adoo.fr, netdev@...r.kernel.org, oneukum@...e.com, pabeni@...hat.com, 
	stern@...land.harvard.edu, syzkaller-bugs@...glegroups.com, Xu Panda <xu.panda@....com.cn>
Subject: Re: [syzbot] [can?] WARNING in ucan_probe

On 17.02.2025 03:55:16, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    496659003dac Merge tag 'i2c-for-6.14-rc3' of git://git.ker..
> git tree:       upstream
> console+strace: https://syzkaller.appspot.com/x/log.txt?x=11012bf8580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=c776e555cfbdb82d
> dashboard link: https://syzkaller.appspot.com/bug?extid=d7d8c418e8317899e88c
> compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
> syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14f7b9b0580000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=155602e4580000
> 
> Downloadable assets:
> disk image: https://storage.googleapis.com/syzbot-assets/c1675d5fc116/disk-49665900.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/0342ce7d0bc9/vmlinux-49665900.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/5ce5b4978fc4/bzImage-49665900.xz
> 
> The issue was bisected to:
> 
> commit b3e40fc85735b787ce65909619fcd173107113c2
> Author: Oliver Neukum <oneukum@...e.com>
> Date:   Thu May 2 11:51:40 2024 +0000
> 
>     USB: usb_parse_endpoint: ignore reserved bits

I think the issue was introduced in: 7fdaf8966aae ("can: ucan: use
strscpy() to instead of strncpy()"). I'm preparing a fix.

regards,
Marc

-- 
Pengutronix e.K.                 | Marc Kleine-Budde          |
Embedded Linux                   | https://www.pengutronix.de |
Vertretung Nürnberg              | Phone: +49-5121-206917-129 |
Amtsgericht Hildesheim, HRA 2686 | Fax:   +49-5121-206917-9   |

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