linux-kernel - Re: [syzbot] INFO: rcu detected stall in net_tx

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Date:   Tue, 26 Jul 2022 08:50:09 -0700
From:   syzbot <syzbot+3ba0493d523d007b3819@...kaller.appspotmail.com>
To:     axboe@...nel.dk, cgroups@...r.kernel.org, fweisbec@...il.com,
        linux-block@...r.kernel.org, linux-kernel@...r.kernel.org,
        ming.lei@...hat.com, mingo@...nel.org, netdev@...r.kernel.org,
        syzkaller-bugs@...glegroups.com, tglx@...utronix.de, tj@...nel.org
Subject: Re: [syzbot] INFO: rcu detected stall in net_tx_action

syzbot suspects this issue was fixed by commit:

commit 0a9a25ca78437b39e691bcc3dc8240455b803d8d
Author: Ming Lei <ming.lei@...hat.com>
Date:   Fri Mar 18 13:01:43 2022 +0000

    block: let blkcg_gq grab request queue's refcnt

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=1004f05a080000
start commit:   d6765985a42a Revert "be2net: disable bh with spin_lock in ..
git tree:       net
kernel config:  https://syzkaller.appspot.com/x/.config?x=7ca96a2d153c74b0
dashboard link: https://syzkaller.appspot.com/bug?extid=3ba0493d523d007b3819
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14c9edc8300000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=172463c8300000

If the result looks correct, please mark the issue as fixed by replying with:

#syz fix: block: let blkcg_gq grab request queue's refcnt

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