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

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Message-ID: <20251031170520.0b8486cf@kernel.org>
Date: Fri, 31 Oct 2025 17:05:20 -0700
From: Jakub Kicinski <kuba@...nel.org>
To: Kees Cook <kees@...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 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.