linux-kernel - Re: WARNING in generic_make_request

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Date:   Fri, 22 Nov 2019 04:05:01 -0800
From:   syzbot <syzbot+21cfe1f803e0e158acf1@...kaller.appspotmail.com>
To:     00moses.alexander00@...il.com, axboe@...nel.dk, bvanassche@....org,
        hare@...e.com, hch@....de, idryomov@...il.com,
        joseph.qi@...ux.alibaba.com, jthumshirn@...e.de,
        keescook@...omium.org, linux-block@...r.kernel.org,
        linux-kernel@...r.kernel.org, ming.lei@...hat.com,
        sagi@...mberg.me, snitzer@...hat.com,
        syzkaller-bugs@...glegroups.com, tj@...nel.org,
        torvalds@...ux-foundation.org, wgh@...lan.ru, zkabelac@...hat.com
Subject: Re: WARNING in generic_make_request_checks

syzbot has bisected this bug to:

commit a32e236eb93e62a0f692e79b7c3c9636689559b9
Author: Linus Torvalds <torvalds@...ux-foundation.org>
Date:   Fri Aug 3 19:22:09 2018 +0000

     Partially revert "block: fail op_is_write() requests to read-only  
partitions"

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=119503d2e00000
start commit:   60f5a217 Merge tag 'usercopy-fix-v4.18-rc8' of git://git.k..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=139503d2e00000
console output: https://syzkaller.appspot.com/x/log.txt?x=159503d2e00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=2dc0cd7c2eefb46f
dashboard link: https://syzkaller.appspot.com/bug?extid=21cfe1f803e0e158acf1
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17b87bfc400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=117ccc8c400000

Reported-by: syzbot+21cfe1f803e0e158acf1@...kaller.appspotmail.com
Fixes: a32e236eb93e ("Partially revert "block: fail op_is_write() requests  
to read-only partitions"")

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