From: Greg KH <gregkh@linuxfoundation.org>
To: Phillip Potter <phil@philpotter.co.uk>
Cc: mchehab+huawei@kernel.org, daniel.vetter@ffwll.ch,
dri-devel@lists.freedesktop.org, linux-fbdev@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] zero-fill colormap in drivers/video/fbdev/core/fbcmap.c
Date: Fri, 2 Apr 2021 17:37:23 +0200 [thread overview]
Message-ID: <YGc6M4jao4ZbCqzJ@kroah.com> (raw)
In-Reply-To: <20210331220719.1499743-1-phil@philpotter.co.uk>
On Wed, Mar 31, 2021 at 11:07:19PM +0100, Phillip Potter wrote:
> Use kzalloc() rather than kmalloc() for the dynamically allocated parts
> of the colormap in fb_alloc_cmap_gfp, to prevent a leak of random kernel
> data to userspace under certain circumstances.
>
> Fixes a KMSAN-found infoleak bug reported by syzbot at:
> https://syzkaller.appspot.com/bug?id=741578659feabd108ad9e06696f0c1f2e69c4b6e
>
> Reported-by: syzbot+47fa9c9c648b765305b9@syzkaller.appspotmail.com
> Signed-off-by: Phillip Potter <phil@philpotter.co.uk>
> ---
> drivers/video/fbdev/core/fbcmap.c | 8 ++++----
> 1 file changed, 4 insertions(+), 4 deletions(-)
Daniel, want me to take this?
thanks,
greg k-h
prev parent reply other threads:[~2021-04-02 15:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-31 22:07 [PATCH] zero-fill colormap in drivers/video/fbdev/core/fbcmap.c Phillip Potter
2021-04-01 9:55 ` Geert Uytterhoeven
2021-04-02 8:57 ` Phillip Potter
2021-04-02 15:37 ` Greg KH [this message]
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=YGc6M4jao4ZbCqzJ@kroah.com \
--to=gregkh@linuxfoundation.org \
--cc=daniel.vetter@ffwll.ch \
--cc=dri-devel@lists.freedesktop.org \
--cc=linux-fbdev@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=mchehab+huawei@kernel.org \
--cc=phil@philpotter.co.uk \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).