linux-kernel - Re: KASAN: slab-out-of-bounds Read in vc_do

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Message-ID: <00000000000065b384059d094190@google.com>
Date:   Sun, 26 Jan 2020 03:26:00 -0800
From:   syzbot <syzbot+c37a14770d51a085a520@...kaller.appspotmail.com>
To:     b.zolnierkie@...sung.com, daniel.thompson@...aro.org,
        daniel.vetter@...ll.ch, daniel.vetter@...el.com, ghalat@...hat.com,
        gregkh@...uxfoundation.org, jslaby@...e.com,
        linux-kernel@...r.kernel.org, maarten.lankhorst@...ux.intel.com,
        nico@...xnic.net, okash.khawaja@...il.com, oleksandr@...hat.com,
        sam@...nborg.org, syzkaller-bugs@...glegroups.com,
        textshell@...uujin.de
Subject: Re: KASAN: slab-out-of-bounds Read in vc_do_resize

syzbot has bisected this bug to:

commit 9e1467002630065ed86c65ea28bfc9194fff6f0e
Author: Daniel Vetter <daniel.vetter@...ll.ch>
Date:   Tue May 28 09:02:59 2019 +0000

    fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls

bisection log:  https://syzkaller.appspot.com/x/bisect.txt?x=135a779ee00000
start commit:   d96d875e Merge tag 'fixes_for_v5.5-rc8' of git://git.kerne..
git tree:       upstream
final crash:    https://syzkaller.appspot.com/x/report.txt?x=10da779ee00000
console output: https://syzkaller.appspot.com/x/log.txt?x=175a779ee00000
kernel config:  https://syzkaller.appspot.com/x/.config?x=83c00afca9cf5153
dashboard link: https://syzkaller.appspot.com/bug?extid=c37a14770d51a085a520
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=1659a721e00000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=16aa59c9e00000

Reported-by: syzbot+c37a14770d51a085a520@...kaller.appspotmail.com
Fixes: 9e1467002630 ("fbcon: replace FB_EVENT_MODE_CHANGE/_ALL with direct calls")

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