mirror of https://lore.kernel.org/lkml/
 help / color / mirror / Atom feed
From: Eduard Zingerman <eddyz87@gmail.com>
To: Shung-Hsi Yu <shung-hsi.yu@suse.com>,
	Andrii Nakryiko <andrii@kernel.org>,
	 cve@kernel.org
Cc: Tao Lyu <tao.lyu@epfl.ch>,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
	 linux-kernel@vger.kernel.org
Subject: Re: CVE-2023-52920: bpf: support non-r10 register spill/fill to/from stack in precision tracking
Date: Thu, 07 Nov 2024 21:17:00 -0800	[thread overview]
Message-ID: <961720ed43b3df26042efc260d433fb6ddf5c44e.camel@gmail.com> (raw)
In-Reply-To: <emjjveewgoegvinmjmba4ys34vbmb3sp6r6qefv77i5mtettmj@hsvm5vm3qivd>

On Fri, 2024-11-08 at 12:42 +0800, Shung-Hsi Yu wrote:
> Hi Andrii and Eduard,

Hi Shung-Hsi,

> I'm trying to determine the security implication of CVE-2023-52920, or
> more specifically, what does commit 41f6f64e6999 ("bpf: support non-r10
> register spill/fill to/from stack in precision tracking") fix.
> Superficially this looks more like an improvement to the verifier.

It is my understanding as well, that this commit is an optimization to
avoid some precision marks. I do not see any security implications.

Thanks,
Eduard

[...]


  reply	other threads:[~2024-11-08  5:17 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <2024110518-CVE-2023-52920-17f6@gregkh>
2024-11-08  4:42 ` Shung-Hsi Yu
2024-11-08  5:17   ` Eduard Zingerman [this message]
2024-11-08  7:59     ` Tao Lyu
2024-11-12  8:14       ` Shung-Hsi Yu

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=961720ed43b3df26042efc260d433fb6ddf5c44e.camel@gmail.com \
    --to=eddyz87@gmail.com \
    --cc=andrii@kernel.org \
    --cc=cve@kernel.org \
    --cc=gregkh@linuxfoundation.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=shung-hsi.yu@suse.com \
    --cc=tao.lyu@epfl.ch \
    /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
all inboxes | Powered by JetHome®