linux-kernel - Re: [syzbot] [net?] kernel BUG in skbprio

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Message-ID: <Z+cMPsPQfpEFJz60@pop-os.localdomain>
Date: Fri, 28 Mar 2025 13:53:18 -0700
From: Cong Wang <xiyou.wangcong@...il.com>
To: syzbot <syzbot+a3422a19b05ea96bee18@...kaller.appspotmail.com>
Cc: davem@...emloft.net, edumazet@...gle.com, horms@...nel.org,
	jhs@...atatu.com, jiri@...nulli.us, kuba@...nel.org,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	pabeni@...hat.com, syzkaller-bugs@...glegroups.com
Subject: Re: [syzbot] [net?] kernel BUG in skbprio_enqueue

On Thu, Mar 27, 2025 at 03:01:29AM -0700, syzbot wrote:
> Hello,
> 
> syzbot found the following issue on:
> 
> HEAD commit:    f6e0150b2003 Merge tag 'mtd/for-6.15' of git://git.kernel...
> git tree:       upstream
> console output: https://syzkaller.appspot.com/x/log.txt?x=13a14a4c580000
> kernel config:  https://syzkaller.appspot.com/x/.config?x=46a07195688b794b
> dashboard link: https://syzkaller.appspot.com/bug?extid=a3422a19b05ea96bee18
> 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=109e343f980000
> C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=1037abb0580000
> 
> Downloadable assets:
> disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-f6e0150b.raw.xz
> vmlinux: https://storage.googleapis.com/syzbot-assets/7ade4c34c9b1/vmlinux-f6e0150b.xz
> kernel image: https://storage.googleapis.com/syzbot-assets/1fe37b97ec9d/bzImage-f6e0150b.xz
> 
> IMPORTANT: if you fix the issue, please add the following tag to the commit:
> Reported-by: syzbot+a3422a19b05ea96bee18@...kaller.appspotmail.com
> 
> ------------[ cut here ]------------
> kernel BUG at net/sched/sch_skbprio.c:127!

I am looking into this bug.

BTW, it is not related to my qlen_notify patchset since it is not yet
merged and this stack trace does not even involve qlen_notify.

Thanks.