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

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Message-ID: <20200916123519.GB2808885@kroah.com>
Date:   Wed, 16 Sep 2020 14:35:19 +0200
From:   Greg KH <gregkh@...uxfoundation.org>
To:     Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>
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 Wed, Sep 16, 2020 at 07:06:31PM +0900, Tetsuo Handa wrote:
> 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".

Ok, will pick it up now, thanks.

greg k-h