linux-kernel - Re: [RFC PATCH 2/4] net: pass 'optlen_t' to proto[ops].getsockopt() hooks

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <62ef4f1e-a726-423a-a765-ee584ee681c0@samba.org>
Date: Mon, 31 Mar 2025 22:27:17 +0200
From: Stefan Metzmacher <metze@...ba.org>
To: Linus Torvalds <torvalds@...ux-foundation.org>,
 Jens Axboe <axboe@...nel.dk>
Cc: Pavel Begunkov <asml.silence@...il.com>, Breno Leitao
 <leitao@...ian.org>, Jakub Kicinski <kuba@...nel.org>,
 Christoph Hellwig <hch@....de>, Karsten Keil <isdn@...ux-pingi.de>,
 Ayush Sawal <ayush.sawal@...lsio.com>, Andrew Lunn <andrew+netdev@...n.ch>,
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
 Paolo Abeni <pabeni@...hat.com>, Simon Horman <horms@...nel.org>,
 Kuniyuki Iwashima <kuniyu@...zon.com>, Willem de Bruijn
 <willemb@...gle.com>, David Ahern <dsahern@...nel.org>,
 Marcelo Ricardo Leitner <marcelo.leitner@...il.com>,
 Xin Long <lucien.xin@...il.com>, Neal Cardwell <ncardwell@...gle.com>,
 Joerg Reuter <jreuter@...na.de>, Marcel Holtmann <marcel@...tmann.org>,
 Johan Hedberg <johan.hedberg@...il.com>,
 Luiz Augusto von Dentz <luiz.dentz@...il.com>,
 Oliver Hartkopp <socketcan@...tkopp.net>,
 Marc Kleine-Budde <mkl@...gutronix.de>,
 Robin van der Gracht <robin@...tonic.nl>,
 Oleksij Rempel <o.rempel@...gutronix.de>, kernel@...gutronix.de,
 Alexander Aring <alex.aring@...il.com>,
 Stefan Schmidt <stefan@...enfreihafen.org>,
 Miquel Raynal <miquel.raynal@...tlin.com>,
 Alexandra Winter <wintera@...ux.ibm.com>,
 Thorsten Winkler <twinkler@...ux.ibm.com>,
 James Chapman <jchapman@...alix.com>, Jeremy Kerr <jk@...econstruct.com.au>,
 Matt Johnston <matt@...econstruct.com.au>,
 Matthieu Baerts <matttbe@...nel.org>, Mat Martineau <martineau@...nel.org>,
 Geliang Tang <geliang@...nel.org>, Krzysztof Kozlowski <krzk@...nel.org>,
 Remi Denis-Courmont <courmisch@...il.com>,
 Allison Henderson <allison.henderson@...cle.com>,
 David Howells <dhowells@...hat.com>, Marc Dionne <marc.dionne@...istor.com>,
 Wenjia Zhang <wenjia@...ux.ibm.com>, Jan Karcher <jaka@...ux.ibm.com>,
 "D. Wythe" <alibuda@...ux.alibaba.com>, Tony Lu <tonylu@...ux.alibaba.com>,
 Wen Gu <guwen@...ux.alibaba.com>, Jon Maloy <jmaloy@...hat.com>,
 Boris Pismenny <borisp@...dia.com>, John Fastabend
 <john.fastabend@...il.com>, Stefano Garzarella <sgarzare@...hat.com>,
 Martin Schiller <ms@....tdt.de>, Björn Töpel
 <bjorn@...nel.org>, Magnus Karlsson <magnus.karlsson@...el.com>,
 Maciej Fijalkowski <maciej.fijalkowski@...el.com>,
 Jonathan Lemon <jonathan.lemon@...il.com>,
 Alexei Starovoitov <ast@...nel.org>, Daniel Borkmann <daniel@...earbox.net>,
 Jesper Dangaard Brouer <hawk@...nel.org>, netdev@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-sctp@...r.kernel.org,
 linux-hams@...r.kernel.org, linux-bluetooth@...r.kernel.org,
 linux-can@...r.kernel.org, dccp@...r.kernel.org, linux-wpan@...r.kernel.org,
 linux-s390@...r.kernel.org, mptcp@...ts.linux.dev,
 linux-rdma@...r.kernel.org, rds-devel@....oracle.com,
 linux-afs@...ts.infradead.org, tipc-discussion@...ts.sourceforge.net,
 virtualization@...ts.linux.dev, linux-x25@...r.kernel.org,
 bpf@...r.kernel.org, isdn4linux@...tserv.isdn4linux.de,
 io-uring@...r.kernel.org
Subject: Re: [RFC PATCH 2/4] net: pass 'optlen_t' to proto[ops].getsockopt()
 hooks

> diff --git a/net/socket.c b/net/socket.c
> index 9a0e720f0859..fa2de12c10e6 100644
> --- a/net/socket.c
> +++ b/net/socket.c
> @@ -2350,12 +2350,15 @@ int do_sock_getsockopt(struct socket *sock, bool compat, int level,
>   	} else if (unlikely(!ops->getsockopt)) {
>   		err = -EOPNOTSUPP;
>   	} else {
> -		if (WARN_ONCE(optval.is_kernel || optlen.is_kernel,
> +		optlen_t _optlen = { .up = NULL, };
> +
> +		if (WARN_ONCE(optval.is_kernel,

Sorry, the removal of '|| optlen.is_kernel' should be in the next commit...

>   			      "Invalid argument type"))
>   			return -EOPNOTSUPP;