linux-hardening - Re: [net-next PATCH v4 1/7] net: Convert proto_ops bind() callbacks to use sockaddr

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Message-ID: <3BF4FE5C-376C-4FF5-8D1F-D5088D5DA6A1@kernel.org>
Date: Fri, 31 Oct 2025 22:11:44 -0700
From: Kees Cook <kees@...nel.org>
To: Jakub Kicinski <kuba@...nel.org>
CC: Paolo Abeni <pabeni@...hat.com>,
 "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>,
 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: [net-next PATCH v4 1/7] net: Convert proto_ops bind() callbacks to use sockaddr_unsized

On October 31, 2025 5:05:20 PM PDT, Jakub Kicinski <kuba@...nel.org> wrote:
>On Wed, 29 Oct 2025 14:43:58 -0700 Kees Cook wrote:
>> Update all struct proto_ops bind() callback function prototypes from
>> "struct sockaddr *" to "struct sockaddr_unsized *" to avoid lying to the
>> compiler about object sizes. Calls into struct proto handlers gain casts
>> that will be removed in the struct proto conversion patch.
>
>I fail to spot whether the new type is defined :)
>Or is the new type not defined at all?
>If it is probably best to have that as a separate patch.

Arrrgh. Yeah, what should be patch 1 got skipped. I will try again! 😭

-- 
Kees Cook