From mboxrd@z Thu Jan 1 00:00:00 1970 Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.remote-ip=115.124.30.112 ARC-Seal: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; cv=none; t=1793778199; b=VYsdnluGeoUfv/Sm08/VjmAso9EixEWRa50/fGXRgjLOopHiKcFAWkpA/D9iikvMGuwr LbK9lb8axhH1Sz6Ajy/HRgMBZEhkLTT3mt0RL9qjvlTry3QI7oRuhFJ6bXMkfK4YIUgRK C2TKktvF6r/9YIsg/ibM6I//VWw7D+wmcBHLWkXCXFmiuic6bqdNRndEDjO/S6Z9HJUMR +ONGlTIOtOTLvRXEFACOWKCT/mP0awyRan+HWSuBBP1Mr70L6IKdZetNUPXdA8fy3fzYc y4IS1IadzDGQvFIcIdzvFFGVqlqfM2Pz6mHupXBhU5jxUYfXBuwSebmvgneQn4ePBtA== ARC-Message-Signature: i=1; d=subspace.kernel.org; s=arc20261015; a=rsa-sha256; c=relaxed/relaxed; t=1793778199; h=DMARC-Filter:DKIM-Signature:X-Alimail-AntiSpam:Received:Message-ID: Date:MIME-Version:User-Agent:Subject:To:Cc:References:From: In-Reply-To:Content-Type:Content-Transfer-Encoding; bh=5hKduYDZmO0ZyDw+yuFcDnroE1QUbUuaD9pBPMc9eNA=; b=ChwGEX4ks6dIfVsXZwfEp4K+l6BWB4AJMckKQHIWUCT3a58s9CzwwV0PBXqQ4tNXV7sk 3K0CcJIkM28e44T5UIhH83lb6+C5zkVtggKKtIvKK+qGObuS1SItOlQj1ZLoeuH0EnjyA 8n7VpSNA15LiqlVRIGp5qaD3lWB3dIte+ioOx40vgahA4iV7ENWbzxF+L/sOs1t3/bPns TrarJRKHBWdZHG3uNdyu6dRUW6YM263aEFaNfdmZHwF2rb3WKPFRi07Gz0KQsku5538dE /aSGKQln22Rc1L5MtwKPClFpW2ITWH7pBSRfumfwjW0QvKLOrnNpDX0YhHgmDmqKxmA== ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass header.from=linux.alibaba.com; spf=pass smtp.mailfrom=linux.alibaba.com; dkim=pass header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=gufJ0ed+; arc=none smtp.remote-ip=115.124.30.112 Received: from out30-112.freemail.mail.aliyun.com (out30-112.freemail.mail.aliyun.com [115.124.30.112]) (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 F0F81606A31B; Wed, 4 Nov 2026 07:43:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.2 smtp.subspace.kernel.org F0F81606A31B Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linux.alibaba.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key, unprotected) header.d=linux.alibaba.com header.i=@linux.alibaba.com header.a=rsa-sha256 header.s=default header.b=gufJ0ed+ DKIM-Signature:v=1; a=rsa-sha256; c=relaxed/relaxed; d=linux.alibaba.com; s=default; t=1793778195; h=Message-ID:Date:MIME-Version:Subject:To:From:Content-Type; bh=5hKduYDZmO0ZyDw+yuFcDnroE1QUbUuaD9pBPMc9eNA=; b=gufJ0ed+6izILNwH+wOjcNVDEBEenS+oR4oCOjInVkz6mmEG1umJElBQMXXLaomIEkG11dCWMteoSqZX4sjochw42lggftJUgmnsiz8023K7w3h6wYfHRkeYiaMfqPcoaGA6a2a1mZPs4a8oDcvfjRcHhoHbJNp+nkiiy4FYsr4= X-Alimail-AntiSpam:AC=PASS;BC=-1|-1;BR=01201311R791e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=maildocker-contentspam033045098064;MF=joseph.qi@linux.alibaba.com;NM=1;PH=DS;RN=7;SR=0;TI=SMTPD_---0XE56Yqe_1793778193; Received: from 30.221.129.178(mailfrom:joseph.qi@linux.alibaba.com fp:SMTPD_---0XE56Yqe_1793778193 cluster:ay36) by smtp.aliyun-inc.com; Wed, 04 Nov 2026 15:43:14 +0800 Message-ID: Date: Wed, 4 Nov 2026 15:43:13 +0800 X-Mailing-List: linux-kernel@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] ocfs2: validate xattr bucket count against extent size To: Jiale Yao Cc: Mark Fasheh , Joel Becker , Heming Zhao , ocfs2-devel@lists.linux.dev, linux-kernel@vger.kernel.org, stable@vger.kernel.org References: <20261028050229.124718-1-yaojiale02@163.com> From: Joseph Qi In-Reply-To: <20261028050229.124718-1-yaojiale02@163.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/28/26 1:02 PM, Jiale Yao wrote: > The first xattr bucket stores the number of valid buckets in its extent. > Lookup and iteration trust this on-disk value even when it exceeds the > number of buckets covered by the extent record. A corrupted value can > therefore make them read blocks beyond the extent. > > Validate the count against the extent cluster count before using it. > Reject zero as well because every xattr extent contains at least its first > bucket. > Please describe the user effect of this issue. Thanks, Joseph