From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 299052D8DA8 for ; Wed, 4 Mar 2026 20:25:06 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772655907; cv=none; b=pM+Fp3Z4Ts4EDGMCT13ak+0OSri+NtX//2MJ/hUm5R+yfda9VyQOAylyqxiLlqva96b11vUiemMsAVTIX4hGM2nyeGksRNNuAI3HrfWJ6ooaq/XaB9b1r3X3jARHSvPMIHdXVl1tN8B+2woWXd6ZTyAORubuDNMZ5IF1Pw0EB0M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1772655907; c=relaxed/simple; bh=pOUxmRBpGQP60VOcs1zQ0MqbWgMvFmHVtSB5zL6dgJM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=jq+epvLL0SUU2oZuPpUz99ZiVN6iG6oh993pceYzd4BGgDLX4Q1usDFlwFirMvew3L5ErJn89ff+zAnD5b4lDV++Wuptp6kxAyZlo7k6XZwQoL1pOY8PzmR2hfsXjl18Mi3ED/p7vXUr6G5izM8UoI7NLHbetIDqjWmoHnBeaEs= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=td/i951A; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="td/i951A" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3E393C19425; Wed, 4 Mar 2026 20:25:05 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1772655906; bh=pOUxmRBpGQP60VOcs1zQ0MqbWgMvFmHVtSB5zL6dgJM=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=td/i951AI50+Q7QKfBEjikWRAiSXLQl2xq67L0tQpTDEMXOtacOEds+w4/pOZ32Hz QOMsb98RQuRS33/7YvOI4bpv8FmrRlF7ZxnJ8o79rJoK/sXK8UFwL9vvwgtdhgCf4r xogapVBYeRJkR2mDULPGjWfGeB7nUjjFbjJVX9y6aayPSbfUtExvQ6Xv46IJJF5S43 CFoWCPY/A464gd3TVW69DxM2VNHSoexxpIiCqkMamd1jc7+7OtX+Fi3vp8q+iAU0S2 WweyZ1PRJ7thIY759IjMoPP2I2AN9ehQrrd25INxXrGBiICbLCRoeibS2//NaLjYLN 5SRPRvrOmGKfQ== Message-ID: <8650044e-595d-4058-9b67-25cc545bc302@kernel.org> Date: Thu, 5 Mar 2026 05:25:03 +0900 Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 01/14] drbd: Balance RCU calls in drbd_adm_dump_devices() To: Bart Van Assche , Jens Axboe Cc: Christoph Hellwig , Marco Elver , linux-block@vger.kernel.org, =?UTF-8?Q?Christoph_B=C3=B6hmwalder?= , Andreas Gruenbacher , Philipp Reisner , Lars Ellenberg , Nathan Chancellor References: <20260304194843.760669-1-bvanassche@acm.org> <20260304194843.760669-2-bvanassche@acm.org> Content-Language: en-US From: Damien Le Moal Organization: Western Digital Research In-Reply-To: <20260304194843.760669-2-bvanassche@acm.org> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 3/5/26 04:48, Bart Van Assche wrote: > Make drbd_adm_dump_devices() call rcu_read_lock() before > rcu_read_unlock() is called. This has been detected by the Clang > thread-safety analyzer. Compile-tested only. > > Tested-by: Christoph Böhmwalder > Cc: Andreas Gruenbacher > Fixes: a55bbd375d18 ("drbd: Backport the "status" command") > Signed-off-by: Bart Van Assche This probably should be sent independently of this series and immediately as this look like a serious bug. -- Damien Le Moal Western Digital Research