Received: by 2002:a25:86ce:0:0:0:0:0 with SMTP id y14csp992099ybm; Wed, 22 May 2019 15:21:58 -0700 (PDT) X-Google-Smtp-Source: APXvYqzBE+Bop3KURD7gHbrgRPLhgNXxE+tZjwcAspfyyr/rBRwYzeC6bhPRzNwpC5xUybD32itI X-Received: by 2002:a63:6cc5:: with SMTP id h188mr31979659pgc.105.1558563718546; Wed, 22 May 2019 15:21:58 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1558563718; cv=none; d=google.com; s=arc-20160816; b=zYGCneTkuYF9O955tDIQpnk+9j/RdFAd/L4LiLuGrew6eMZay9KUtLr9wntpIWGQFw XT4SDv2b53pcyBCEJ8yiX6hnCjMkCkc8c4QDAL5qKzzIMjNhJCY8PdWJyEoO2GgeZsuo 0VOrY/L7zSU+BpywrYVt5neJLO/j+eABIsY5dFOjjVF1nUABlyRj+T2N4bsvJQ/OZEnz F4t8NQ+wKJef3iKJTWcVAp0exv+4D5HTSSYUqlMo0L6C2vgcp7UtgRLZSH2GNwmOs92x ueZZH1nYpPzu2qz8+o4o/jONPa6zmk6L3XyHLVyRjjJ9xq4Fb7v2Q4cB9OxBcthwxA9c 3zKA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:in-reply-to:content-disposition :mime-version:references:message-id:subject:cc:to:from:date :dkim-signature; bh=zKpoS8ChVauG/b5jE7jdGLek9tzNeFPqv0E/OMjWjmE=; b=sLrTFeqbMlTZiUiR10Kb4yT0Y0DQ+67KzAFWUQ8SHTP6+0MDhPCe94+BwDrNvVRqKg azGS3s/Hq2h2hyeHS7u0b9DDHEBErdjiqK3gMSMbspXSUrpkEtDcNWXl4X00rjqEs0AU mLsoDIo+sDtsIT2VmCg7+jaPbP4yyZCQ8RZdBbG00nP89q8NVK33BQeRXZvYRX5lLGjY Y9aWQM1eQf5pUwMsRQmZUAfe6vbYoPPy6jLX6lhRfVq1kzQmyoDBxJpOpQAU7gr75QsN AAYjGogujEg4DlAnjMAnI/U1omwh277PMv1qd5H3vPx9mvmKl2y6HCFe0H2dvRbqFv5I hH8g== ARC-Authentication-Results: i=1; mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=l6Twn3Uj; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id q203si25980998pgq.384.2019.05.22.15.21.41; Wed, 22 May 2019 15:21:58 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@chromium.org header.s=google header.b=l6Twn3Uj; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=chromium.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727899AbfEVWUJ (ORCPT + 99 others); Wed, 22 May 2019 18:20:09 -0400 Received: from mail-pg1-f193.google.com ([209.85.215.193]:42181 "EHLO mail-pg1-f193.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725823AbfEVWUJ (ORCPT ); Wed, 22 May 2019 18:20:09 -0400 Received: by mail-pg1-f193.google.com with SMTP id e17so1861174pgo.9 for ; Wed, 22 May 2019 15:20:09 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=date:from:to:cc:subject:message-id:references:mime-version :content-disposition:in-reply-to; bh=zKpoS8ChVauG/b5jE7jdGLek9tzNeFPqv0E/OMjWjmE=; b=l6Twn3UjulqQqYjQ1sV1Om600H5NzmMO9lU7YFqwo77Q3wEt3NpC2jGlLXf606OARJ u5179gymw9vrMKnbwCTv3rehfAly651iOeW71m1DadeWX4CicN1zq9VWAolyQFIs7fHo Av9uo86ofFN6IiAIpEWhPjsElNYdgRQbdvBI0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:in-reply-to; bh=zKpoS8ChVauG/b5jE7jdGLek9tzNeFPqv0E/OMjWjmE=; b=Z7zJpk3Xw9IEy5Pe3glLZS3ZqSO2JEBej7psvCIaX/3sBKlMv0E49hvSUex1ddvQP5 eMlWZGQDd4fFTzfRQwkAOl+s8cOCyGUsqjsWeesnk9kPDAcj4L8lWEuoq3KLqt6GxORz ub6mag8AJ+A08ggOZaXV6UCXPnTLKeWonkklcVxQbK/QT1IrvZj5DTykI35scRcEFIkn 3gdogl8B0ivpvF7KlYvKxyn5agg2lBzUHpXLuv/4dp4diP20bRyv9uPKLSIFKsPDMZAI J8R+JEkf8mVcW+gAlT+2yTJVFqgMfoO4maDTW4FzQkWHU0Iy5lwSRjHfL4JqNzrEK3sA Yqrg== X-Gm-Message-State: APjAAAVS0rzk2is7fYG0SmeMOOBfHea9QxfWF8EK6NZJPi7x+LlUtrK4 MqTLHt4/VgJw/EAdcVqbqqqpwQ== X-Received: by 2002:a63:ed03:: with SMTP id d3mr92213341pgi.7.1558563608854; Wed, 22 May 2019 15:20:08 -0700 (PDT) Received: from www.outflux.net (smtp.outflux.net. [198.145.64.163]) by smtp.gmail.com with ESMTPSA id x16sm28300353pff.30.2019.05.22.15.20.07 (version=TLS1_2 cipher=ECDHE-RSA-CHACHA20-POLY1305 bits=256/256); Wed, 22 May 2019 15:20:07 -0700 (PDT) Date: Wed, 22 May 2019 15:20:06 -0700 From: Kees Cook To: Boris Brezillon Cc: "Gustavo A. R. Silva" , Vignesh Raghavendra , Richard Weinberger , linux-kernel@vger.kernel.org, Marek Vasut , Kyungmin Park , linux-mtd@lists.infradead.org, Miquel Raynal , Brian Norris , David Woodhouse Subject: Re: [PATCH] mtd: onenand_base: Avoid fall-through warnings Message-ID: <201905221519.88B9364E@keescook> References: <20190522180446.GA30082@embeddedor> <201905221403.642AF6092@keescook> <20190522235738.68059906@collabora.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190522235738.68059906@collabora.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, May 22, 2019 at 11:57:38PM +0200, Boris Brezillon wrote: > All this look suspicious, and even if the fall through logic > has no side effects in practice (which I'm still not sure is the case), > I think it'd be better to explicitly set the flags that have > to be set in each case statement and add breaks. Yeah, totally agreed. :) -- Kees Cook