linux-kernel - Re: WARNING in hsr_forward

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Date:   Tue, 12 Mar 2019 01:57:00 -0700
From:   syzbot <syzbot+fdce8f2a8903f3ba0e6b@...kaller.appspotmail.com>
To:     arvid.brodin@...en.se, axboe@...com, axboe@...nel.dk,
        davem@...emloft.net, hch@....de, linux-block@...r.kernel.org,
        linux-can@...r.kernel.org, linux-kernel@...r.kernel.org,
        ming.lei@...hat.com, mkl@...gutronix.de, netdev@...r.kernel.org,
        socketcan@...tkopp.net, syzkaller-bugs@...glegroups.com
Subject: Re: WARNING in hsr_forward_skb

syzbot has bisected this bug to:

commit ab42f35d9cb5ac49b5a2a11f940e74f58f207280
Author: Ming Lei <ming.lei@...hat.com>
Date:   Fri May 26 11:53:19 2017 +0000

     blk-mq: merge bio into sw queue before plugging

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=16e68713200000
start commit:   ab42f35d blk-mq: merge bio into sw queue before plugging
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=15e68713200000
console output: https://syzkaller.appspot.com/x/log.txt?x=11e68713200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=5e7dc790609552d7
dashboard link: https://syzkaller.appspot.com/bug?extid=fdce8f2a8903f3ba0e6b
userspace arch: amd64
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=15f6d1fd400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=17290fdd400000

Reported-by: syzbot+fdce8f2a8903f3ba0e6b@...kaller.appspotmail.com
Fixes: ab42f35d ("blk-mq: merge bio into sw queue before plugging")