From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pg1-f174.google.com (mail-pg1-f174.google.com [209.85.215.174]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id AF33E289340 for ; Mon, 14 Apr 2025 18:44:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.215.174 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744656271; cv=none; b=Ibba1iuoaiT3Nmb3wKSa7JxFnRhWDqo/67HgzOhmeAgVH+9Gp6JBmC+qb/jw4tpDVaui1IZVIEAo2QPRmDk4zZfLVWeFIGKeOC9ZFdgIs+RAqG/D546ABc3YJWkgAscjIx6UaykrAgIq7M3WVdTSLiR5MfY4Mt+OXb0mXTeRGR4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1744656271; c=relaxed/simple; bh=YpSfHpLk4g82/Efaxxr4vcOeA7lwSVP0ZoulsVdeGLY=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Raed8jaeW6dLObWDGGQEuhWq8AGRTa/fJuFlSToScBnNW7V67HnjrEg0ahvlG+zE9ClXHPlRHGSqr8EjLJNSAhY9Wa4sAnwuvLiO78IHtGuXUcPwOz5Hpe9AGbrf+YQNjs/4iT9DgRLh35KKGpSInkWFEOBrTvvH/qaRnbszwOg= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org; spf=pass smtp.mailfrom=chromium.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b=E12PzeVZ; arc=none smtp.client-ip=209.85.215.174 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="E12PzeVZ" Received: by mail-pg1-f174.google.com with SMTP id 41be03b00d2f7-b07d607dc83so1349963a12.1 for ; Mon, 14 Apr 2025 11:44:29 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1744656269; x=1745261069; darn=vger.kernel.org; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date:from:to :cc:subject:date:message-id:reply-to; bh=YpSfHpLk4g82/Efaxxr4vcOeA7lwSVP0ZoulsVdeGLY=; b=E12PzeVZu5Exwy8LyxFk9HWgo0LQ+XxMijoqt+C1B+Mp3AYP3HgimWmrf9iOztUsrf 4UHJRw1rgGT5K2jugGhaZYNqMS6qBc4LSCCwbOjuZ1TPhvHD/SZzcqq2/oTv/wxv6qsY hKoy7XFhw7AZeIAB4v0NuPvLvGIFSngF5FTv0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1744656269; x=1745261069; h=in-reply-to:content-transfer-encoding:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=YpSfHpLk4g82/Efaxxr4vcOeA7lwSVP0ZoulsVdeGLY=; b=gyjlLI0dc/j2EeIGEnVVPi5T42JQQ1S0eUG3SdH2Jfq1qK4zky2EAYGhUCme6BDYrV WkuNNhmyNx7xdiAweL/Y6tXY3YgbcHJctk+GYuKssPpGCemMXna0ZKuh1EVYw4ibTI+I qH/0Chv1Lay4pfC063c/VRtGUnGmxsuUD9L1/hS8ayapOSf8PjCJ7Akny+quGQGTZy6b 3+hrmuMj80REkKzTaV1twE2f1hc6gW8xMmdk+68LTyUP75l3wk46PVs2LpXYNo3ThRGc 2Q+u0QDgMSJMc+PFrPBMvRQKYSxEEoA3onv6LWmHu8gSwaduaskRa3biOFbcrQXCgK5b 3djg== X-Forwarded-Encrypted: i=1; AJvYcCWISDn5Ru8smdKjK560EDKkOOgo/aKlX+EOhY4Rkx7+YNejpqorY1HkbGiEPRKRjirOXZgwM6HUFkjwyAiqEg==@vger.kernel.org X-Gm-Message-State: AOJu0Yz3eppzy85EcFWE7K+2UZWaFvV9kwFkjnRTP5K3KPn2R3tsayf0 VCLxI+msPWWp+SqR4/OIk7YOu85prRJARIvN0icqdd742uagGEilVgTn6U5DCA== X-Gm-Gg: ASbGncs8KZTegGlLZd9QIToRcvAoys1xCyNp+XxZNy0hQWvK9rVR/nkGOZg8VtUYzyG zA9G8lfynl4JgpCk0c4V261T3/ZaHILDJQNBtg7W1/c3tGesMuQLeT600EhNpTKG9000dDBggTF /bltzwJ8phHhP7XqqJrwWW7mIR3eS5ooV6mSMV5jiJOq7hmaYGDG7ELdcstkTcim+gCCSYfsEMI 88AtSFZmqbGAqAjHBVRzwVQ1g7GqXzR+2iQXcEwqwXQaaFWIrlsc/7OSzEQFdKRT9+3OVa9OIBE qruiKUmxuzWihP82kJ/igWiNznVJYRkGUv9ZHTq9EmQvABd/V/2OD/CVoW56jVy/00Xmf2safVh 4Zw== X-Google-Smtp-Source: AGHT+IHRnGevNVFCEzzLtuARDY+GV3b1ySMboNdXjtt9nCxP859MMeYdEqvd7RpkkuyGR22MEOT6ZQ== X-Received: by 2002:a17:90b:2752:b0:301:1bce:c255 with SMTP id 98e67ed59e1d1-308237ba788mr18304386a91.27.1744656268888; Mon, 14 Apr 2025 11:44:28 -0700 (PDT) Received: from localhost ([2a00:79e0:2e14:7:cfd0:cb73:1c0:728a]) by smtp.gmail.com with UTF8SMTPSA id 98e67ed59e1d1-306df082327sm11386410a91.15.2025.04.14.11.44.26 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 14 Apr 2025 11:44:27 -0700 (PDT) Date: Mon, 14 Apr 2025 11:44:24 -0700 From: Brian Norris To: Thomas =?iso-8859-1?Q?Wei=DFschuh?= Cc: Jeff Johnson , Loic Poulain , Francesco Dolcini , Tony Nguyen , Przemek Kitszel , Andrew Lunn , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Saeed Mahameed , Leon Romanovsky , Tariq Toukan , ath10k@lists.infradead.org, linux-kernel@vger.kernel.org, ath11k@lists.infradead.org, ath12k@lists.infradead.org, wcn36xx@lists.infradead.org, linux-wireless@vger.kernel.org, intel-wired-lan@lists.osuosl.org, netdev@vger.kernel.org, linux-rdma@vger.kernel.org Subject: Re: [PATCH net-next 0/7] net: Don't use %pK through printk Message-ID: References: <20250414-restricted-pointers-net-v1-0-12af0ce46cdd@linutronix.de> Precedence: bulk X-Mailing-List: linux-wireless@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20250414-restricted-pointers-net-v1-0-12af0ce46cdd@linutronix.de> On Mon, Apr 14, 2025 at 10:26:01AM +0200, Thomas Weißschuh wrote: > Furthermore, restricted pointers ("%pK") were never meant to be used > through printk(). Is this really true? Documentation/admin-guide/sysctl/kernel.rst still has a section on kptr_restrict which talks about dmesg, CAP_SYSLOG, and %pK, which sounds like it's intended. But I'm not highly familiar with this space, so maybe I'm misreading something. (I do see that commit a48849e2358e ("printk: clarify the documentation for plain pointer printing") updated Documentation/core-api/printk-formats.rst.) In any case, even if the advice has changed, it seems (again, to an outsider) a bit much to say it was "never" meant to be used through printk(). Brian