linux-kernel - INFO: rcu detected stall in corrupted (4)

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Message-ID: <000000000000cedbc405ae81531f@google.com>
Date:   Fri, 04 Sep 2020 11:49:23 -0700
From:   syzbot <syzbot+aa7d098bd6fa788fae8e@...kaller.appspotmail.com>
To:     davem@...emloft.net, jhs@...atatu.com, jiri@...nulli.us,
        linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, vinicius.gomes@...el.com,
        xiyou.wangcong@...il.com
Subject: INFO: rcu detected stall in corrupted (4)

Hello,

syzbot found the following issue on:

HEAD commit:    0f091e43 netlabel: remove unused param from audit_log_form..
git tree:       net-next
console output: https://syzkaller.appspot.com/x/log.txt?x=14551a71900000
kernel config:  https://syzkaller.appspot.com/x/.config?x=61025c6fd3261bb1
dashboard link: https://syzkaller.appspot.com/bug?extid=aa7d098bd6fa788fae8e
compiler:       gcc (GCC) 10.1.0-syz 20200507
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14eeda25900000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=161472f5900000

The issue was bisected to:

commit 5a781ccbd19e4664babcbe4b4ead7aa2b9283d22
Author: Vinicius Costa Gomes <vinicius.gomes@...el.com>
Date:   Sat Sep 29 00:59:43 2018 +0000

    tc: Add support for configuring the taprio scheduler

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=13096476900000
console output: https://syzkaller.appspot.com/x/log.txt?x=17096476900000

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+aa7d098bd6fa788fae8e@...kaller.appspotmail.com
Fixes: 5a781ccbd19e ("tc: Add support for configuring the taprio scheduler")

hrtimer: interrupt took 18040217 ns
rcu: INFO: rcu_preempt self-detected stall on CPU
rcu: 	0-....: (1 ticks this GP) idle=4ae/0/0x1 softirq=7665/7665 fqs=3 
	(t=11294 jiffies g=9289 q=363)

---
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See https://goo.gl/tpsmEJ for more information about syzbot.
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For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches