linux-kernel - Re: [syzbot] [block?] WARNING in blk_mq_start

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Date:   Wed, 08 Nov 2023 13:18:04 -0800
From:   syzbot <syzbot+fcc47ba2476570cbbeb0@...kaller.appspotmail.com>
To:     axboe@...nel.dk, bvanassche@....org, chaitanyak@...dia.com,
        eadavis@...com, hch@...radead.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, ming.lei@...hat.com,
        syzkaller-bugs@...glegroups.com, zhouchengming@...edance.com
Subject: Re: [syzbot] [block?] WARNING in blk_mq_start_request

syzbot has bisected this issue to:

commit d78bfa1346ab1fe04d20aa45a0678d1fc866f37c
Author: Chengming Zhou <zhouchengming@...edance.com>
Date:   Wed Sep 13 15:16:16 2023 +0000

    block/null_blk: add queue_rqs() support

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=106414a8e80000
start commit:   13d88ac54ddd Merge tag 'vfs-6.7.fsid' of git://git.kernel...
git tree:       upstream
final oops:     https://syzkaller.appspot.com/x/report.txt?x=126414a8e80000
console output: https://syzkaller.appspot.com/x/log.txt?x=146414a8e80000
kernel config:  https://syzkaller.appspot.com/x/.config?x=beb32a598fd79db9
dashboard link: https://syzkaller.appspot.com/bug?extid=fcc47ba2476570cbbeb0
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1465bb08e80000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=13e7881f680000

Reported-by: syzbot+fcc47ba2476570cbbeb0@...kaller.appspotmail.com
Fixes: d78bfa1346ab ("block/null_blk: add queue_rqs() support")

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