From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 ACD5D258CCC for ; Wed, 14 Jan 2026 12:44:00 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.137.202.133 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768394644; cv=none; b=S9wUzpdAPn4PRlbbRCnJi6tOs/+WY+/sqpWqoVvWANUr9DeYV4vXqB7jz8m1ZxmAHAyIqU4q9O+H9eUGdb6aBpV4eGwMpu2qxzmxGtjoPcFy8UweDGz4BNBYXhOaamCi5g3jORSQ3wq76zwTksJz63W2f8Pn9p556nukJjUR0OU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768394644; c=relaxed/simple; bh=rTXiqjGwQe9StbY8q2PGEsSVnb5XD/eiq91f8fTTRKI=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Yk/0bAqtrPN2HWMkZzYR8VeOSLpg9APcPopWIRUWZniTwjZuIuz62ZEs/uF1VAlBUyumJ5EpTl0MWIKx7ReN3HfTKNZ3KQfBw8s8egepYFvv83Ii3P0ky0MThOzuM3oxKgCxXRRBMo4jpYCCd+9QVuqmWkrEpioBokGkX2zLO7E= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b=desi+bbh; arc=none smtp.client-ip=198.137.202.133 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=infradead.org Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=bombadil.srs.infradead.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="desi+bbh" DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=bombadil.20210309; h=In-Reply-To:Content-Type:MIME-Version :References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=KOu8e0fvmwRWQ233dbgArPcX6Udc57jyEPBr1+MBcUQ=; b=desi+bbhygwxq8XMZtuOwgx6vv nYcTfKhc5GY8sWVCT7bL9gn9BmKv6gFjyvaBW0dSZXEzQr5SqPeeD7WIhuhg/wG5wlvWTbBcEdosg O2wALqxIeGRsoLO4b+L7Sy5xozWvsd3D4my5YD211ZUT6gZ0UJnUtBCoP/IN0gcdei7zu6YMw2z4F rGYJkccSMkepN8IgjOZ4JRQIgKnt3+WHdDZynYmEVvY0cwVCkjWDKSri7kZ1bw9IYshMaM4SzxLvT qDFuzTFqiJlzkqQ2Zxw77eZHapbOdRCa4gkPvj3EYXKVHQZDYx0CQVMABFwlq3skMQQ4wQayhanlf mmSG6ayw==; Received: from hch by bombadil.infradead.org with local (Exim 4.98.2 #2 (Red Hat Linux)) id 1vg0E9-00000009DkZ-327u; Wed, 14 Jan 2026 12:43:57 +0000 Date: Wed, 14 Jan 2026 04:43:57 -0800 From: Christoph Hellwig To: alex+zkern@zazolabs.com Cc: Yi Zhang , Jens Axboe , fengnanchang@gmail.com, linux-block , Ming Lei , Shinichiro Kawasaki Subject: Re: [bug report][bisected] kernel BUG at lib/list_debug.c:32! triggered by blktests nvme/049 Message-ID: References: <0e1446e1-f2a7-41f4-8b3c-bce225f49aa6@kernel.dk> <4817253e-2cec-4cf8-95c4-6292e758fb8f@zazolabs.com> Precedence: bulk X-Mailing-List: linux-block@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: <4817253e-2cec-4cf8-95c4-6292e758fb8f@zazolabs.com> X-SRS-Rewrite: SMTP reverse-path rewritten from by bombadil.infradead.org. See http://www.infradead.org/rpr.html On Wed, Jan 14, 2026 at 11:40:41AM +0200, Alexander Atanasov wrote: > Double linked lists require init, single lists do not (including > io_wq_work_list). iopoll_node is never list_init-ed. So init before adding. > > Can you check if this fixes it for you? If yes, i will submit it as a proper > patch - no way to test it at the moment. The heads (anchors) of lists need initializations. The entries added to the list do not. I know this is a bit confusing because they use the same time, but besides not compiling due to the double-&, the patch would not do anything even the version that would compile.