linux-kernel - Re: [PATCH] fbcon: Fix user font detection test at fbcon

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Message-ID: <3233dcc2-31d5-42e7-3d9d-b36a65b660ea@i-love.sakura.ne.jp>
Date:   Wed, 16 Sep 2020 19:06:31 +0900
From:   Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
To:     Greg KH <gregkh@...uxfoundation.org>
Cc:     syzbot <syzbot+b38b1ef6edf0c74a8d97@...kaller.appspotmail.com>,
        george.kennedy@...cle.com, jirislaby@...nel.org,
        syzkaller-bugs@...glegroups.com, b.zolnierkie@...sung.com,
        daniel.vetter@...ll.ch, dri-devel@...ts.freedesktop.org,
        linux-fbdev@...r.kernel.org, linux-kernel@...r.kernel.org,
        natechancellor@...il.com
Subject: Re: [PATCH] fbcon: Fix user font detection test at fbcon_resize().

On 2020/09/16 17:26, Greg KH wrote:
> On Wed, Sep 16, 2020 at 09:01:06AM +0900, Tetsuo Handa wrote:
>> Greg, will you pick up this patch?
>>
>> It seems that finding the real cause of [3] and actually fixing [3] will be difficult.
>> Since I can't reproduce [3] locally, I will have to try flood of "#syz test" requests
>> for debug printk() patches.
> 
> I agree with Daniel here, can you retest these against Linus's latest
> tree please?
> 

syzbot already reproduced these bugs using the latest commit. ;-)

You can find

  ci-upstream-kasan-gce-root 	2020/09/15 15:18 	upstream 	fc4f28bb 

record for "KASAN: global-out-of-bounds Read in bit_putcs" and

  ci-upstream-kasan-gce-root 	2020/09/16 09:54 	upstream 	fc4f28bb

record for "KASAN: global-out-of-bounds Read in fbcon_resize".