From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=199.89.1.14 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1792685980; b=k9jCKv3sDK0aqCnAwzsq1MXn50UodIRjxQzB3uiYA3t0cPQX2uf3DoGruMOwjW2AfZ9k Jg6cNLUofKZ5qGi/xYrqhL5d9mtzpYduCYFpyAEW65fxA93RmNo0kQADdmJ3pwNGCdDm3 5+zzfz4GiX3Gm4H95ffaO/8tFZTiG5Pu4iwClQJfkM/O6Ij5yWIa9llYU80NylhUklMVS z9tx2AbYiUVbYMd/wrkeypMxB9hY0MdCy3ad7VBNhzwz4tZjl49Dh0Aitvhhu6o9sL8Dw SGa5r+IZlwmUe+Mj8r52d91vs2T3xvCh2YPqoZxy75Osa9gUR9U0v+Oxhq+wfB87aQg== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1792685980; h=DMARC-Filter:Received:DKIM-Signature:X-Virus-Scanned:Received: Received:Message-ID:Date:MIME-Version:User-Agent:Subject:To:Cc: References:Content-Language:From:In-Reply-To:Content-Type: Content-Transfer-Encoding; bh=rUe/fDB85DFfM7fh+QFYZ6VWMP/4KqUiMHPEMUaN3YU=; b=NAPeR0YELWevGImK2+UmKlMT3kW9Qc8ysjT1RXo4qX1M+aqbICDjgQqdbljh1TIHjgd6 nLRXaOdpa+LMGeMNuHy1B3StKypTJxLiubmR6zonSCl+bRv0yWXe8fLq6yTY93RwyDF3W ZYJ6NiaJQNu+Dv/iW7+PCKYHCkwXg4ssNl1x42vvCQjvvo0Uxqeb9S3mKNfOUftlBOBqE UNj4vV4wwGpeU1Qod1yxpZRMjjXG5ZGj2K0JCdLZcgjr9AST4g32l1mLVgJUUegAZgI61 EEm9OCOEZExYpLa91In0I7v3zQTzKyWKLOqNX9J5nEC0uIbMOLT2fEUKENsfaY8AJ9Q== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=acm.org; spf=pass smtp.mailfrom=acm.org; dkim=pass header.d=acm.org header.i=@acm.org header.a=rsa-sha256 header.s=mr01 header.b=EihQGIJ9; arc=none smtp.remote-ip=199.89.1.14 Received: from 011.lax.mailroute.net (011.lax.mailroute.net [199.89.1.14]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5E9EE606A31E for ; Thu, 22 Oct 2026 16:19:40 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org 5E9EE606A31E Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=reject dis=none) header.from=acm.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=acm.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=acm.org header.i=@acm.org header.a=rsa-sha256 header.s=mr01 header.b=EihQGIJ9 Received: from localhost (localhost [127.0.0.1]) by 011.lax.mailroute.net (Postfix) with ESMTP id 4j9WZM5r97z1XM4Tn; Thu, 22 Oct 2026 16:19:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=acm.org; h= content-transfer-encoding:content-type:content-type:in-reply-to :from:from:content-language:references:subject:subject :user-agent:mime-version:date:date:message-id:received:received; s=mr01; t=1792685976; x=1795277977; bh=rUe/fDB85DFfM7fh+QFYZ6VW MP/4KqUiMHPEMUaN3YU=; b=EihQGIJ9SayYyWEWp12HMne+sMheeeIg9euLwqRJ OPQX51UuR6/f9ctXpF2+7ThKXiYyVXORahvNojTwaJYlM6tpmBWGY2J8EkWwdeZS yj7MtcdLIEHZ4eJ94Gd6dFyM6Fe4Q1t60TmfgoKIAhEqdn6ZIK7fHyQJ/ukmFllK CU65TGlAZx2y1P7/iKFgbwMHhhOQNLZdRf7AIQMUblyzT9+VYzL8BklYHZd8EBIr Sbf7etIW7UPTeCif6kAQygBm88QofOhLE6DNYj6wf+z84+Wi3BwkIjWQHtreE/aj uHJp1es73dvnRG8xUSEvwUMbawaS6AlJbbIzalehJxWohw== X-Virus-Scanned: by MailRoute Received: from 011.lax.mailroute.net ([127.0.0.1]) by localhost (011.lax [127.0.0.1]) (mroute_mailscanner, port 10029) with LMTP id diFMy1hHes1x; Thu, 22 Oct 2026 16:19:36 +0000 (UTC) Received: from [100.80.231.125] (unknown [104.135.182.41]) (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) (Authenticated sender: bvanassche@acm.org) by 011.lax.mailroute.net (Postfix) with ESMTPSA id 4j9WZJ2Kvhz1XM4Tl; Thu, 22 Oct 2026 16:19:35 +0000 (UTC) Message-ID: <5c7b9f30-893e-4127-8ffa-3d5b7224674f@acm.org> Date: Thu, 22 Oct 2026 09:19:35 -0700 X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2] block: fix recursive i_rwsem locking in blkdev_write_iter() To: Zhenxian Ma , axboe@kernel.dk, linux-block@vger.kernel.org Cc: hch@lst.de, syzbot+bd975ef54294bec73f0e@syzkaller.appspotmail.com, Tal Zussman , Julian Sun References: <20261021093332.17334-1-mzx199711@gmail.com> <20261022062513.77372-1-mzx199711@gmail.com> Content-Language: en-US From: Bart Van Assche In-Reply-To: <20261022062513.77372-1-mzx199711@gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/21/26 11:25 PM, Zhenxian Ma wrote: > Drop the outer locking in the fallback. Reviewed-by: Bart Van Assche