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

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Message-ID: <68680f9a.a00a0220.c7b3.001f.GAE@google.com>
Date: Fri, 04 Jul 2025 10:30:02 -0700
From: syzbot <syzbot+15b96fc3aac35468fe77@...kaller.appspotmail.com>
To: davem@...emloft.net, edumazet@...gle.com, horms@...nel.org, 
	jhs@...atatu.com, jiri@...nulli.us, kuba@...nel.org, 
	linux-kernel@...r.kernel.org, lizhi.xu@...driver.com, netdev@...r.kernel.org, 
	nnamrec@...il.com, pabeni@...hat.com, syzkaller-bugs@...glegroups.com, 
	xiyou.wangcong@...il.com
Subject: Re: [syzbot] [net?] general protection fault in drr_qlen_notify

syzbot has bisected this issue to:

commit 103406b38c600fec1fe375a77b27d87e314aea09
Author: Lion Ackermann <nnamrec@...il.com>
Date:   Mon Jun 30 13:27:30 2025 +0000

    net/sched: Always pass notifications when child class becomes empty

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=10d66c8c580000
start commit:   17bbde2e1716 Merge tag 'net-6.16-rc5' of git://git.kernel...
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=12d66c8c580000
console output: https://syzkaller.appspot.com/x/log.txt?x=14d66c8c580000
kernel config:  https://syzkaller.appspot.com/x/.config?x=8b0724e6945b4773
dashboard link: https://syzkaller.appspot.com/bug?extid=15b96fc3aac35468fe77
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14044c8c580000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14840c8c580000

Reported-by: syzbot+15b96fc3aac35468fe77@...kaller.appspotmail.com
Fixes: 103406b38c60 ("net/sched: Always pass notifications when child class becomes empty")

For information about bisection process see: https://goo.gl/tpsmEJ#bisection