From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from stravinsky.debian.org (stravinsky.debian.org [82.195.75.108]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5CC57418A22; Wed, 29 Jul 2026 09:31:24 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=82.195.75.108 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785317486; cv=none; b=j1zsDMPMDO5EDN51fUUVCi5hzAkkBJodzwgPKSAdj7Hy3nHj3x9YYqdP00hZIMlK17hKK18eclfRnqjIc9epEoyE0WoTDnC2lvmla4haD3+1V6hjshctuerl6LgeM34moDUNkLXfOaeDWfojkbmUgSXPybSqX9MNtbVXNLLe9Qg= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1785317486; c=relaxed/simple; bh=goi9CPQwE8TpyR1lM4/rc7SLFyr7ChfGkPjSM3o4Kyk=; h=From:Subject:Date:Message-Id:MIME-Version:Content-Type:To:Cc; b=uuaUReqBp9agfaZiLhNJw1UBMt0EBuxrfQJahkG6iJJHWWD/cfcCFGiRG+d8kk7HBmxF1Xa+VToIWWwTxDu2xyti4wcTxr/mDEAgsMUKiH3o3i5+JnglmccgALa0q6ZC8WLHB3GyPIn0l0bG+Ako42i2LYAi6OqpfAGnpBujFO0= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=debian.org; spf=pass smtp.mailfrom=debian.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b=orvOppBB; arc=none smtp.client-ip=82.195.75.108 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=debian.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=debian.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=debian.org header.i=@debian.org header.b="orvOppBB" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=debian.org; s=smtpauto.stravinsky; h=X-Debian-User:Cc:To:Content-Transfer-Encoding: Content-Type:MIME-Version:Message-Id:Date:Subject:From:Reply-To:Content-ID: Content-Description:In-Reply-To:References; bh=Dr94O1kir2CwIJCJZlyBCOCuwakMlQfT+sHqCQ+HbGw=; b=orvOppBBD7UEuy84K3hRDClzQ1 GSP5ZU7QrSYTk4/Wlx4SH4ySfWkf0cRs0cHlFGUB5WBjwrXzn4+Ax9jqBdT8P16p/LvitQ5Ez0oaA uzgsAhWZ8JJOJyqVTQWNHKfmq2Zj5g/y/YjLBbztju04RG5oiR47BCBKMDQBo0o4s9Z2JQC1P1DwZ 6nid78iYd+ogCezNAUNPghNojg2hVBSDcb6dcc/LRGhLIRVy1sOhXFNZHxiT6b5hYznpj3FKmLVnK 8eFlNpIU5meHgMNk/G5KvC34nO/PBdwGcWGo3ZitCKG+MxGJj5gSJo9BWJy3gNXRiuKthi3xPkQQe FJ2+LrtA==; Received: from authenticated-user by stravinsky.debian.org with esmtpsa (TLS1.3:ECDHE_X25519__RSA_PSS_RSAE_SHA256__AES_256_GCM:256) (Exim 4.96) (envelope-from ) id 1wp0cr-008LzA-1K; Wed, 29 Jul 2026 09:30:59 +0000 From: Breno Leitao Subject: [PATCH net-next v4 0/7] net: convert rawv6, ieee802154, phonet and tls getsockopt to sockopt_t Date: Wed, 29 Jul 2026 02:29:43 -0700 Message-Id: <20260729-getsockopt_phase4-v4-0-c44576757c17@debian.org> Precedence: bulk X-Mailing-List: netdev@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit X-B4-Tracking: v=1; b=H4sIAAjIaWoC/23NwWqEMBCA4VcJc3bKJMZEPe17lFKycaKhYCQJs mXx3QvSw5Z6/uH7n1A4Ry4wiidk3mOJaYVR6EaAX9w6M8YJRgGKlCErO5y5luS/0lY/t8UV1ih 7UjT44A05aARsmUN8nOY7rFxx5UeFj0bAEktN+fuc7fLsv665cHeJhDrozt+lmjzb28T36Na3l OeT29ULoeiKUEjYO+qDD44mq/4R7Sthr4gWCbkfjLKd1qYd/hDHcfwA7BBq4EMBAAA= X-Change-ID: 20260715-getsockopt_phase4-180209cfc60a To: sdf@fomichev.me, "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Simon Horman , Alexander Aring , Stefan Schmidt , Miquel Raynal , Remi Denis-Courmont , =?utf-8?q?R=C3=A9mi_Denis-Courmont?= , John Fastabend , Sabrina Dubroca , Shuah Khan Cc: netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-wpan@vger.kernel.org, linux-kselftest@vger.kernel.org, Breno Leitao , kernel-team@meta.com, Joe Damato , =?utf-8?q?R=C3=A9mi_Denis-Courmont?= X-Mailer: b4 0.16-dev-d5d98 X-Developer-Signature: v=1; a=openpgp-sha256; l=2801; i=leitao@debian.org; h=from:subject:message-id; bh=goi9CPQwE8TpyR1lM4/rc7SLFyr7ChfGkPjSM3o4Kyk=; b=owEBbQKS/ZANAwAIATWjk5/8eHdtAcsmYgBqachL3sSXl6xSp4F2vxG+qvFn6PGacTQxbt1ro MtXFUuv9nWJAjMEAAEIAB0WIQSshTmm6PRnAspKQ5s1o5Of/Hh3bQUCamnISwAKCRA1o5Of/Hh3 bRDSD/9+E21HheE9lEFh3E7b+v31ombrGv6cAWNscdKESvr3iAMepcsvVTO431FXrPqV9Ld+tE5 ntw9jIAviWNIUOAVt7H6dMRFE870+a9VzczWvAJI1MtrfB8ny5T/+QEs8+/SQ1mM+qLZyZYpu71 7nsMNuij/4KlzXSwdhe2s+fdNdGhsLFeUkdYiOJFAVjfzeZ+3DgmtG5L9CBx6+ztdSoipV8r70w q4i9bU7JezUBV3aEugzGUFMDlCe/NdeCh/PB6KWMHwzLXYYl4jKpQBuxZvorR6UYrFQWz8J4/AL dIXuxg+f6t9XIjkYAh0XoxVho7oTGHb+tVBE5bpYNET+Wr7REWd2IzbgkCb6WDw8oXq3QzOgqvQ Pb+5j9zFn3y8rv985cUECqRVxULx2Aq4CLphQpiMXQ0amKL/jupIVi8sILBR+xXaQI8YsN1QsCV +WR8DficJkAJJK2oQd1MSqE4T8ktwH4/LshYBfAZnVgy1Oqk2Bz+hIHxJLq89GeDb0zUuJDW0XA YdJpljxqW9AkiwhID0/vxMIa2JU9aihMMDEl+Rz0AAhkRIYpMgk0C8WEiilIV7EqFr8H3km6LWA OPTH2fOT1nr5ciEDevpa5/WqRnVYjRLLGZhXDaXtHFJtALwxup7VunYt4dKi/Nu/KgRJBDtan6w UrBK1TDDLGVWteg== X-Developer-Key: i=leitao@debian.org; a=openpgp; fpr=AC8539A6E8F46702CA4A439B35A3939FFC78776D X-Debian-User: leitao Now that sockopt_init_user() was already merged, builds a user-backed sockopt_t from the __user pair. A getsockopt leaf can then take a sockopt_t behind a thin __user wrapper: the wrapper builds it, calls the leaf, and writes the length back to optlen. The leaf copies with copy_to_iter() instead of copy_to_user(). Convert four more leaves the way udp and raw already were: ipv6 raw (do_rawv6_getsockopt), ieee802154 dgram, phonet pep, and tls (do_tls_getsockopt and its per-option helpers). Converting phonet surfaced a pre-existing bug: pep_getsockopt() clamps the length it reports but writes a full int with put_user(), overrunning an optval buffer shorter than sizeof(int). It is fixed in its own patch, with a Fixes: tag, before the phonet conversion, so it can be backported alone. The last patch adds getsockopt_iter selftest fixtures for rawv6, ieee802154, phonet and tls, checking the returned length and errno across exact, oversized and short buffers, an unknown optname and a bad level. For full motivation about these changes, please check the initial thread at link https://lore.kernel.org/all/20260401-getsockopt-v2-0-611df6771aff@debian.org/#t Signed-off-by: Breno Leitao --- Changes in v4: - In the selftest, check the return value of socket(2) (Sashiko) - Drop ieee802154 and phonet selftest cases; their CONFIGs are absent in NIPA (Jakub) - Link to v3: https://patch.msgid.link/20260727-getsockopt_phase4-v3-0-e89627544639@debian.org Changes in v3: - min_t() -> umin() on ieee802154/rawv6 (Joe) - Link to v2: https://patch.msgid.link/20260720-getsockopt_phase4-v2-0-8a08fcfa0d72@debian.org Changes in v2: - Replace min_t() by umin() (David) - Link to v1: https://patch.msgid.link/20260716-getsockopt_phase4-v1-0-4f45cb12dce7@debian.org --- Breno Leitao (7): ipv6: raw: drop unused level argument from do_rawv6_getsockopt ipv6: raw: convert do_rawv6_getsockopt to sockopt_t ieee802154: convert dgram getsockopt to sockopt_t phonet: pep: do not write beyond optlen in getsockopt phonet: pep: convert getsockopt to sockopt_t tls: convert getsockopt to sockopt_t selftests: net: getsockopt_iter: cover rawv6 and tls net/ieee802154/socket.c | 38 ++-- net/ipv6/raw.c | 29 +++- net/phonet/pep.c | 36 ++-- net/tls/tls_main.c | 80 ++++----- tools/testing/selftests/net/getsockopt_iter.c | 239 ++++++++++++++++++++++++++ 5 files changed, 349 insertions(+), 73 deletions(-) --- base-commit: f6f3b36c15ed44de1fbb44e645e4fae8c4a4453e change-id: 20260715-getsockopt_phase4-180209cfc60a Best regards, -- Breno Leitao