linux-kernel - Re: KASAN: null-ptr-deref Write in media_request

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Date:   Thu, 18 Jun 2020 10:56:04 -0700
From:   syzbot <syzbot+6bed2d543cf7e48b822b@...kaller.appspotmail.com>
To:     ezequiel@...labora.com, laurent.pinchart@...asonboard.com,
        linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
        mchehab+huawei@...nel.org, mchehab@...nel.org,
        sakari.ailus@...ux.intel.com, syzkaller-bugs@...glegroups.com
Subject: Re: KASAN: null-ptr-deref Write in media_request_close

syzbot has bisected this bug to:

commit 016baa59bf9f6c2550480b73f18100285e3a4fd2
Author: Ezequiel Garcia <ezequiel@...labora.com>
Date:   Tue Apr 14 22:06:24 2020 +0000

    media: Kconfig: Don't expose the Request API option

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=108d7149100000
start commit:   7ae77150 Merge tag 'powerpc-5.8-1' of git://git.kernel.org..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=128d7149100000
console output: https://syzkaller.appspot.com/x/log.txt?x=148d7149100000
kernel config:  https://syzkaller.appspot.com/x/.config?x=be4578b3f1083656
dashboard link: https://syzkaller.appspot.com/bug?extid=6bed2d543cf7e48b822b
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=17b3fc35100000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=12fbb6f1100000

Reported-by: syzbot+6bed2d543cf7e48b822b@...kaller.appspotmail.com
Fixes: 016baa59bf9f ("media: Kconfig: Don't expose the Request API option")

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