From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-pl1-f181.google.com (mail-pl1-f181.google.com [209.85.214.181]) (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 6823315E20F for ; Thu, 18 Apr 2024 17:12:08 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=209.85.214.181 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713460329; cv=none; b=YlAl+CkhGVAYpcGshvQmjWJ3jbPozRruxZP9Ma84YhI8dksDxuOgaFUCcvGC6pI7Sflg5zBQpPI46HIXUlZ2wu0PCc+lWanFoGY7N2UHx7d87ADLpeQcVEnENSbz8tqiNLZr+GACZ47wJ5+W2j1gD4ABg+8AgpZu7YX+AgfB5mY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1713460329; c=relaxed/simple; bh=V4bD0JhlT+UQ1ATauOhPA9TteDqpGdm2KZM8d041ViM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=SPBqhnNXS7RuMv28V8tRzgZK0WjLDGbhoA+t+KHYwgWQkeVq71sCJnNS/tt8ucM6pkm1C+qCb+RHQTs/hx226hPaIVtXUMXT4ySsiKJkqnKaJiUp8/9qBYNfw+rCjQSAb4EQhtBgwq6EGBh1Yz1eaad5pk1L2Ec0IjAa71YrOpg= 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=c2/2f+K3; arc=none smtp.client-ip=209.85.214.181 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="c2/2f+K3" Received: by mail-pl1-f181.google.com with SMTP id d9443c01a7336-1e3f6f03594so9561795ad.0 for ; Thu, 18 Apr 2024 10:12:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1713460328; x=1714065128; darn=vger.kernel.org; h=in-reply-to:content-disposition:mime-version:references:message-id :subject:cc:to:from:date:from:to:cc:subject:date:message-id:reply-to; bh=Srcc8GSfebZLoUs5UEqC/Q5n1RryFdWaKvCpiJ/RKN0=; b=c2/2f+K3iNgmz9NGLiIrElX2rcXto28Q773Y5I2zC2/ext9ebHLiBn5t/R7eJnJaRj /PoD3mqROt5aFHFxPXdY/RNO5VXF4g1gU6wj4lJmrP7QYIgdl3wh2eubW19wUGf6vMnL ewaGuVjAHJV+LMZDbF2X2g7fhHEqOP43wPm+s= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1713460328; x=1714065128; h=in-reply-to: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=Srcc8GSfebZLoUs5UEqC/Q5n1RryFdWaKvCpiJ/RKN0=; b=gFyGPyouoKs8VqWooQ8ZZg0KirK0+eKy0m2VyHbbCIa+OFtxvqY/FTTGIjBUYCY35L /Qp3aISyOTMdrFjZcDYyia8Wq+rbtgsgGhIGKQYt9HMbDItV6Crpfq9Lg+Wf0nckJgI+ bQ7FuehUHV97EavlLm7JJxiwjL3eMJm/bRD9V0tjjFBvAR4xkHpXkZ16F7fphyfiGzhA 4WnE392Wgd1Gi5AtcsAOBpqez5cTl5yTM4TeAVFLB+s5B7gwncjXfleX56b6TltZo69Y EWSuq9NK4mVCpk8OnzEI8xAK2WLk9N0nyIgYP7b07RzsdiBZY8c5f65LmI6caTU4CsPo 4hZg== X-Forwarded-Encrypted: i=1; AJvYcCXHzLOGYLxKJTszuHci2/KG7yIqedUALsnL1cf8K5GPFSAP1nft80DP1tUPfa5dnUCtj6dlHXM/bsS+8b82LLq/UkIebAnXpMD/ X-Gm-Message-State: AOJu0YxhUWiYvAanT4BKS/ZdLRw6FZRj2iEYYn/7TvJX3DQnQZwafVKB XAkNGvStU6WsVLXPyr4iFXf07KB1V0P1wfCYhivGxQVuCVYwzUn0pVLeEgbRMQ== X-Google-Smtp-Source: AGHT+IGXRsPSakc8glvVR0fVaanCDT0iQFBXasCGzm9NwhaKMLnvjPABcG55nXEozQZ+YUznpYVeKA== X-Received: by 2002:a17:903:493:b0:1e2:6165:8086 with SMTP id jj19-20020a170903049300b001e261658086mr3335872plb.61.1713460327781; Thu, 18 Apr 2024 10:12:07 -0700 (PDT) Received: from www.outflux.net ([198.0.35.241]) by smtp.gmail.com with ESMTPSA id x7-20020a1709027c0700b001e2c8bc6bebsm1765424pll.81.2024.04.18.10.12.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 18 Apr 2024 10:12:07 -0700 (PDT) Date: Thu, 18 Apr 2024 10:12:06 -0700 From: Kees Cook To: Eric Biggers Cc: Alex Elder , corbet@lwn.net, gregkh@linuxfoundation.org, workflows@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH] Documentation: coding-style: don't encourage WARN*() Message-ID: <202404181010.5C27FE82D@keescook> References: <20240414170850.148122-1-elder@linaro.org> <20240418161430.GB2410@sol.localdomain> Precedence: bulk X-Mailing-List: workflows@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20240418161430.GB2410@sol.localdomain> On Thu, Apr 18, 2024 at 09:14:30AM -0700, Eric Biggers wrote: > Also, it's not true that "Android" sets this option. It might be the case that > some individual Android OEMs have decided to use it for some reason (they do > have the ability to customize their kernel command line, after all). It's > certainly not used by default or even recommended. Ah yes, you are right. I had misremembered; last I looked Android uses of CONFIG_UBSAN_TRAP=y, which has a similar affect (effectively promoting warning into bug) for UBSAN checks. -- Kees Cook