From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C3A53CCD185 for ; Wed, 15 Oct 2025 05:23:36 +0000 (UTC) Received: by kanga.kvack.org (Postfix) id D08FB8E0009; Wed, 15 Oct 2025 01:23:35 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CB85E8E0003; Wed, 15 Oct 2025 01:23:35 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B81968E0009; Wed, 15 Oct 2025 01:23:35 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from relay.hostedemail.com (smtprelay0011.hostedemail.com [216.40.44.11]) by kanga.kvack.org (Postfix) with ESMTP id A260A8E0003 for ; Wed, 15 Oct 2025 01:23:35 -0400 (EDT) Received: from smtpin28.hostedemail.com (a10.router.float.18 [10.200.18.1]) by unirelay04.hostedemail.com (Postfix) with ESMTP id 1BBE41A0AED for ; Wed, 15 Oct 2025 05:23:35 +0000 (UTC) X-FDA: 83999205990.28.494C60A Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.9]) by imf24.hostedemail.com (Postfix) with ESMTP id 6933E180003 for ; Wed, 15 Oct 2025 05:23:32 +0000 (UTC) Authentication-Results: imf24.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=SjBTOJtU; dmarc=pass (policy=none) header.from=intel.com; spf=pass (imf24.hostedemail.com: domain of baolu.lu@linux.intel.com designates 198.175.65.9 as permitted sender) smtp.mailfrom=baolu.lu@linux.intel.com ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1760505813; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=c6SJ1uOdgRs8onMO21B5pckadKM/6bHFkwrEEa1uZI4=; b=IY9V/GBas0kljPmQZ+C7pGwx2EsPkRqfZMjXBKdIhTH1r2dFvIYC+bDDngETFbDgh+8UhA ZDGuV3kYYv9pf2VVdrDrQ4Q3aw+lxirrSyeTyuDbjY1HYzCPSonQ9q0MF6pAj7X3+BHkvy cl1CQIiOi7HmFgDSCPkXJhokf5qS6j4= ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1760505813; a=rsa-sha256; cv=none; b=AHH7eXY0xd3/6P8ejekjyJtHuNlIO64ReTOnM2Xt+bpHCwW/4lFBnw0eydUL8o4Nc7auLA wGWPlBUbPJNaMusZEi/EZmJs7VdkEetQ+GYTbXo836zpPJpSNBUM9veK37aUvqnOCAuLEt UQpDNtKPMjKAxeUKyY2ibkhxdh0pd+4= ARC-Authentication-Results: i=1; imf24.hostedemail.com; dkim=pass header.d=intel.com header.s=Intel header.b=SjBTOJtU; dmarc=pass (policy=none) header.from=intel.com; spf=pass (imf24.hostedemail.com: domain of baolu.lu@linux.intel.com designates 198.175.65.9 as permitted sender) smtp.mailfrom=baolu.lu@linux.intel.com DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1760505813; x=1792041813; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=eK0inZ4rNk5w2Qq8gSVATW8wmK6XxymTxfw6OxJSz54=; b=SjBTOJtUvfODoq0vWNsSBH+xJ/8Rh+l13C/JZEUyudR5+6YCp740HPNo w4Y45Wj1ga7uobXKdo1t9YvfH/mpoziJzWd7QUtcCL4w/WkWESsRpNH2Z aVIpftbgUvqPHYaXg18aC48bBi60QCVDuYSnpm5mdIoWyuBpyU++yDIhc D79gb0myjWjnR/RoCmLBDr0maUttJGUW5OogYd16AJVEU4gI8RJhWiCe+ KbF851JAmU++E9PtF++3V85aMPigWi/qijGpq62mK9CUYvAUUD5QgSwbA /f/pjsIb4hKr2Xxs/eHNy/8bnLwVLufzyRmMK62P5wTfwff7Mh3WkUBv3 w==; X-CSE-ConnectionGUID: uKgWckYSQ2aUaXF0qDlhuw== X-CSE-MsgGUID: xXk1IsmsQ9uttOt1YqRZaQ== X-IronPort-AV: E=McAfee;i="6800,10657,11582"; a="85290274" X-IronPort-AV: E=Sophos;i="6.19,230,1754982000"; d="scan'208";a="85290274" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Oct 2025 22:23:31 -0700 X-CSE-ConnectionGUID: T0k5dDuKTp6Gt6SVFGKEog== X-CSE-MsgGUID: eUacngtfTZetlmPxF9skJQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.19,230,1754982000"; d="scan'208";a="182018745" Received: from allen-sbox.sh.intel.com (HELO [10.239.159.30]) ([10.239.159.30]) by fmviesa006-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 14 Oct 2025 22:23:24 -0700 Message-ID: Date: Wed, 15 Oct 2025 13:19:44 +0800 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v6 3/7] x86/mm: Use 'ptdesc' when freeing PMD pages To: Dave Hansen , Joerg Roedel , Will Deacon , Robin Murphy , Kevin Tian , Jason Gunthorpe , Jann Horn , Vasant Hegde , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Alistair Popple , Peter Zijlstra , Uladzislau Rezki , Jean-Philippe Brucker , Andy Lutomirski , Yi Lai , David Hildenbrand , Lorenzo Stoakes , "Liam R . Howlett" , Andrew Morton , Vlastimil Babka , Mike Rapoport , Michal Hocko , Matthew Wilcox Cc: iommu@lists.linux.dev, security@kernel.org, x86@kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Dave Hansen References: <20251014130437.1090448-1-baolu.lu@linux.intel.com> <20251014130437.1090448-4-baolu.lu@linux.intel.com> Content-Language: en-US From: Baolu Lu In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspamd-Server: rspam01 X-Stat-Signature: 8g48qk895jw4x6k5n9d9qnbpzyz68qrx X-Rspam-User: X-Rspamd-Queue-Id: 6933E180003 X-HE-Tag: 1760505812-284576 X-HE-Meta: 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 bn15uN69 IXFzV5ace7BuCO3Wxy9iXqAuvqoLpQ0cUL8XDSfTq2vQu/xuBRDfK06yBXDFSWwUjF1hk4mpnzDEFiI4bH+WtAvmG79AXl97H2rfTzN2fl7fXNCsqtCK2N3Xd3AnLyPRkPyjqJZHMe6IlK2OvvgVm41UuyUVGqmxxhwkhETpQBDUQJtQbhnYSKwawsIqLlyXRtY3d12TypLguQ2Uezc84cmknpA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On 10/15/25 07:19, Dave Hansen wrote: > On 10/14/25 06:04, Lu Baolu wrote: >> -#if defined(CONFIG_SPLIT_PMD_PTLOCKS) >> - >> +#if defined(CONFIG_SPLIT_PMD_PTLOCKS) || defined(CONFIG_X86_64) > > What's with the #ifdef munging? It's not mentioned in the changelog. > > I went looking at this because pmd_free_pte_page() is right in the > middle of the action on this reported use after free: > >> https://lore.kernel.org/all/68eeb99e.050a0220.91a22.0220.GAE@google.com/ > > so something fishy is going on. It would be great to narrow that report > down to a _specific_ patch in the series. Yes. I am trying to reproduce the issue on my local machine and then narrow down the reported issue. Thanks, baolu