From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=100.103.45.18 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792639075; b=PwSMjDWrZcnGeWPCtnLPXCmLgn6VWy+W/P8kCBApzkiZP6w+7T1sYvYVZhjDvCJ+zxR3 vss4t++yw060qOK6GIK6/mKyNds7VL5EJuHGG7GPCwkVGhScCsdSMmkuQVmXH8vHAmFdW AY9Qsv28YXAvw599Vy0MxTK3Rp7d5hlIxBtd+E0G9f+ELqnVD40kQ2tg1norZ4+L8Cvoq UWorhR+RL3o9tz+cTk1eeRWn5Y7SYPAmcdBCYMD8AMK5nHxKtmbXMg1rCyFDOOkSgzqjN owJloNLsci52lstsnxE+b7U/n6faPqaYzYuGqRy04dmyPLD8rFDWATI7lUrOhdq0ufw== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792639075; h=Received:DKIM-Signature:Message-ID:From:Subject:Reply-To:To:Cc: In-Reply-To:References:Content-Type:Content-Transfer-Encoding:Date; bh=YhGkLlJx5QVD+slE+0O2uxFnfgIFYxxARQHfGU160p8=; b=C41p/U/6QQOtywjDQRE9ZrXaYJFsrtXPlHGBIb6i/aw1hpGXluIw5PS4FHhFN2zL7QNH vVQzo2Z45x/MM/iOj2OBgeb88dWiQnSBGDE/Y3mnVaKB6fn0+teJYbBEItpNCR2DEKcef NDyiTR2N7gCSDqSFWOykCDzp5WUcn5BuVTF/ZuUVQw8pNT6pWfd8h65elF3yTfeuxgRnl k9TnFkC1oohP0GD8BK4xwLj6PfNPUzcjguxgYRi3pa2RUuqmU1otVj+DDI4zWuXTXU8zD b0hjef0zLnSIuKmnqbQTX9jVotii5YR4WZwh7Sagwu633OqjXkZYkrPjLqMinf9fcpw== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=fme8wKDr; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 18757606A32C; Thu, 22 Oct 2026 03:17:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=fme8wKDr Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9FA901F000C1; Thu, 22 Oct 2026 03:17:54 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1792639075; bh=YhGkLlJx5QVD+slE+0O2uxFnfgIFYxxARQHfGU160p8=; h=From:Subject:Reply-To:To:Cc:In-Reply-To:References:Date; b=fme8wKDrp1fNABPJgYoqJ1FvOOYdXNjmaaIdpTg1RKCElDmD6gV7pNRDoQ2IieaHn s5OOSFePXaWrVeKKxQe4/QGv6LQZO11jdz2izFMM7O2Vvk8g37ahracLoFpdV9muiZ 6+I9bB9EOcwMzDoFtAKCjoWsJ/Ksrf8l/wrw3ymyifIxkCZ8xso1yrnp1YQkL2LkJs +tEp0/83lblKoTIhWGFJYsR7aKyG7rtNGjZd3D2bzE+6PW+KEjNNp3NHmEgKlgUTzv RjKbMkw6ci87xx5RmodKShGrrR7gtRyck7IV08/Ft1RMjMVN/+et5HHToEirDEsPpA 9lgprshiePw6Q== Message-ID: From: sashiko-bot@kernel.org Subject: Re: [RFC PATCH v2 28/41] net: add SO_PEERCRED_R, SO_PEERGROUPS_R and SCM_CREDENTIALS_R Reply-To: sashiko-reviews@lists.linux.dev To: "Jan Koester" Cc: linux-security-module@vger.kernel.org, linux-ext4@vger.kernel.org, audit@vger.kernel.org, tytso@mit.edu In-Reply-To: References: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Date: Thu, 22 Oct 2026 03:17:54 +0000 X-Mailing-List: audit@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list > Services authenticate AF_UNIX peers with SO_PEERCRED, SO_PEERGROUPS and > SCM_CREDENTIALS, which carry 32 bit ids: a UUID or GUID user shows up > as the overflow id there. >=20 > Add variants with __kernel_uid_r_t ids: >=20 > - SO_PEERCRED_R returns a struct __kernel_ucred_r of the peer, > - SO_PEERGROUPS_R its supplementary groups as __kernel_gid_r_t, > - SO_PASSCRED_R asks for SCM_CREDENTIALS_R messages, with a struct > __kernel_ucred_r, next to or instead of SCM_CREDENTIALS (a separate > option, so receivers sizing their control buffer for SCM_CREDENTIALS > don't get truncated), and SCM_CREDENTIALS_R can be sent with the same > privilege rules as SCM_CREDENTIALS. >=20 > The classic SCM_CREDENTIALS sending path now shares the checks and pid > handling with it. Netlink keeps classic ids in its skbs, so it hands out > the overflow id for UUID senders in SCM_CREDENTIALS_R too. >=20 > Assisted-by: Claude:claude-opus-5-5 >=20 > Signed-off-by: Jan Koester Sashiko has reviewed this patch and found no issues. --=20 Sashiko AI review =C2=B7 https://sashiko.dev/#/patchset/cover.1792552161.gi= t.jan.koester@tuxist.de?part=3D28