linux-kernel - Re: [PATCH v3 1/9] net: Add struct sockaddr

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Message-ID: <202510230932.25CE49FC8@keescook>
Date: Thu, 23 Oct 2025 09:33:20 -0700
From: Kees Cook <kees@...nel.org>
To: David Laight <david.laight.linux@...il.com>
Cc: Jakub Kicinski <kuba@...nel.org>,
	"Gustavo A. R. Silva" <gustavo@...eddedor.com>,
	Alexei Starovoitov <ast@...nel.org>,
	Daniel Borkmann <daniel@...earbox.net>,
	John Fastabend <john.fastabend@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>, Paolo Abeni <pabeni@...hat.com>,
	Simon Horman <horms@...nel.org>,
	Kuniyuki Iwashima <kuniyu@...gle.com>,
	Willem de Bruijn <willemb@...gle.com>, netdev@...r.kernel.org,
	linux-kernel@...r.kernel.org, bpf@...r.kernel.org,
	linux-hardening@...r.kernel.org
Subject: Re: [PATCH v3 1/9] net: Add struct sockaddr_unspec for sockaddr of
 unknown length

On Wed, Oct 22, 2025 at 10:26:24AM +0100, David Laight wrote:
> If you do add a #define, it can generate the size from that of the
> supplied address structure (and error things that are stupidly short).

I have more patches coming that consolidate all the open-coded casting
and size checking into a macro. So far, only a couple places weren't
doing the full checking.

-- 
Kees Cook