linux-kernel - Re: possible deadlock in v4l2

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Date:   Wed, 20 Mar 2019 12:40:00 -0700
From:   syzbot <syzbot+ea05c832a73d0615bf33@...kaller.appspotmail.com>
To:     ezequiel@...labora.com, hans.verkuil@...co.com, hverkuil@...all.nl,
        laurent.pinchart@...asonboard.com, linux-kernel@...r.kernel.org,
        linux-media@...r.kernel.org, mchehab+samsung@...nel.org,
        mchehab@...nel.org, sakari.ailus@...ux.intel.com,
        sque@...omium.org, syzkaller-bugs@...glegroups.com,
        viro@...iv.linux.org.uk
Subject: Re: possible deadlock in v4l2_release

syzbot has bisected this bug to:

commit 757fdb51c14fda221ccb6999a865f7f895c79750
Author: Hans Verkuil <hans.verkuil@...co.com>
Date:   Mon May 21 08:54:59 2018 +0000

     media: vivid: add request support

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=145c3a6d200000
start commit:   757fdb51 media: vivid: add request support
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=165c3a6d200000
console output: https://syzkaller.appspot.com/x/log.txt?x=125c3a6d200000
kernel config:  https://syzkaller.appspot.com/x/.config?x=d86f24333880b605
dashboard link: https://syzkaller.appspot.com/bug?extid=ea05c832a73d0615bf33
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=10b8e6a3400000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=14e73e2b400000

Reported-by: syzbot+ea05c832a73d0615bf33@...kaller.appspotmail.com
Fixes: 757fdb51 ("media: vivid: add request support")