From: Kees Cook <keescook@chromium.org>
To: "Gustavo A. R. Silva" <gustavoars@kernel.org>
Cc: "Gustavo A. R. Silva" <gustavo@embeddedor.com>,
Geoff Levand <geoff@infradead.org>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org,
Eric Dumazet <edumazet@google.com>,
linux-hardening@vger.kernel.org, Jakub Kicinski <kuba@kernel.org>,
Paolo Abeni <pabeni@redhat.com>,
linuxppc-dev@lists.ozlabs.org,
"David S. Miller" <davem@davemloft.net>
Subject: Re: [PATCH][next] net: spider_net: Use size_add() in call to struct_size()
Date: Fri, 15 Sep 2023 12:53:20 -0700 [thread overview]
Message-ID: <202309151253.844C8BFCA3@keescook> (raw)
In-Reply-To: <ZQSvsLmJrDsKtLCa@work>
On Fri, Sep 15, 2023 at 01:25:36PM -0600, Gustavo A. R. Silva wrote:
> If, for any reason, the open-coded arithmetic causes a wraparound,
> the protection that `struct_size()` adds against potential integer
> overflows is defeated. Fix this by hardening call to `struct_size()`
> with `size_add()`.
>
> Fixes: 3f1071ec39f7 ("net: spider_net: Use struct_size() helper")
> Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
--
Kees Cook
next prev parent reply other threads:[~2023-09-15 19:54 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-09-15 19:25 [PATCH][next] net: spider_net: Use size_add() in call to struct_size() Gustavo A. R. Silva
2023-09-15 19:53 ` Kees Cook [this message]
2023-09-16 0:21 ` Geoff Levand
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=202309151253.844C8BFCA3@keescook \
--to=keescook@chromium.org \
--cc=davem@davemloft.net \
--cc=edumazet@google.com \
--cc=geoff@infradead.org \
--cc=gustavo@embeddedor.com \
--cc=gustavoars@kernel.org \
--cc=kuba@kernel.org \
--cc=linux-hardening@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linuxppc-dev@lists.ozlabs.org \
--cc=netdev@vger.kernel.org \
--cc=pabeni@redhat.com \
/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).