From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from ms.lwn.net (ms.lwn.net [45.79.88.28]) (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 AF4EE175BF; Thu, 5 Sep 2024 20:19:07 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=45.79.88.28 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725567549; cv=none; b=mPVkOQtAsmkhCzmxMvfNAoqTy7IDnWGRYBnB5G5wQFGPFy499e9bKdjDSzEia0XTult00TseaJYkeFi8cvSdsQc8F3DfKMpp6sX6Zq4BBILlA2gu2WigWSvldNOQjmmXX/eJkvEAyMn1tVa8UWlX5EKXmZcjuQ8TQneQkPrWORY= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1725567549; c=relaxed/simple; bh=dSxDom7EipPIlOqbePYFsJJ9UrMmg2qtFlqtq0cX7vk=; h=From:To:Cc:Subject:In-Reply-To:References:Date:Message-ID: MIME-Version:Content-Type; b=N0BeqxuyEu9RL0CyGYPc5AR9GIdRKy4lU7w6UOZJKaqPjIBfShShAIYAYfwl6kHsiWl7r+EGbbUu6ncjjjuD2Obb+tUoESttw/+uQGPQbdgtOhkep/fROfqq1c5zlCWUz4kLWIuZeNST7DpdVHDvWFLZGdF775+iOahU2mlS2dE= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lwn.net; spf=pass smtp.mailfrom=lwn.net; dkim=pass (2048-bit key) header.d=lwn.net header.i=@lwn.net header.b=BPJP4AOp; arc=none smtp.client-ip=45.79.88.28 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=lwn.net Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=lwn.net Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=lwn.net header.i=@lwn.net header.b="BPJP4AOp" DKIM-Filter: OpenDKIM Filter v2.11.0 ms.lwn.net BF1A742B25 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=lwn.net; s=20201203; t=1725567546; bh=dSxDom7EipPIlOqbePYFsJJ9UrMmg2qtFlqtq0cX7vk=; h=From:To:Cc:Subject:In-Reply-To:References:Date:From; b=BPJP4AOploLiilgYBNEBBlMlzee7P8adCjbZxYhNyytj8CV60RYbsOPkNZZZuzywD 2ae38vkyZ4dc4hLiLNL4qT18rk7fiirq9k6p7fe5etg9pnpMpNErRXBSCfqICD0T1X b6C55Ca/EUTYnNv1HZZ7CQfzMlF4dj02YBoyOeRQo0BFL3Fyu6yfxlcJ6iov3PcunY xPFJrf8aHnBh4o8ONGwZARndutcO2bPkCfLR1CTVVXIXv1C3hQBqe3sjV8lL3lcG+m xgqwC+FFMUgF087TzEtivWIxeWHGLvbutROZW5yX5Y8GqRsVCi89HqGgTD8FpOB4Os hzsqiztR6E9tg== Received: from localhost (unknown [IPv6:2601:280:5e00:625::1fe]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by ms.lwn.net (Postfix) with ESMTPSA id BF1A742B25; Thu, 5 Sep 2024 20:19:06 +0000 (UTC) From: Jonathan Corbet To: "Guilherme G. Piccoli" , linux-doc@vger.kernel.org Cc: linux-fsdevel@vger.kernel.org, linux-block@vger.kernel.org, kernel-dev@igalia.com, kernel@gpiccoli.net, "Guilherme G. Piccoli" , Bart Van Assche , "Darrick J. Wong" , Jens Axboe , Jan Kara Subject: Re: [PATCH V5] Documentation: Document the kernel flag bdev_allow_write_mounted In-Reply-To: <20240828145045.309835-1-gpiccoli@igalia.com> References: <20240828145045.309835-1-gpiccoli@igalia.com> Date: Thu, 05 Sep 2024 14:19:05 -0600 Message-ID: <87cylhhn0m.fsf@trenco.lwn.net> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain "Guilherme G. Piccoli" writes: > Commit ed5cc702d311 ("block: Add config option to not allow writing to mounted > devices") added a Kconfig option along with a kernel command-line tuning to > control writes to mounted block devices, as a means to deal with fuzzers like > Syzkaller, that provokes kernel crashes by directly writing on block devices > bypassing the filesystem (so the FS has no awareness and cannot cope with that). > > The patch just missed adding such kernel command-line option to the kernel > documentation, so let's fix that. > > Cc: Bart Van Assche > Cc: Darrick J. Wong > Cc: Jens Axboe > Reviewed-by: Jan Kara > Signed-off-by: Guilherme G. Piccoli > --- Applied, thanks. jon