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 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.lore.kernel.org (Postfix) with ESMTPS id 1F537C44501 for ; Wed, 15 Jul 2026 08:31:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=QcqaG9bdGXl50jPu/JZyaS7ewr6T+770xaHIMx0NS0Y=; b=RsrPwderUKH7tJSAnzUSMPMhNF 8TGE8ekof5Nt7Et4f1DMk0zY57e6HsGEqmSZMLA1Eqq4ZtxujW9VnfPTTFddL+PceLEM46Y79pHtu 7mHp8f1EzU07GBF0N7BVohVeDdHhH2VpknWib6KYmY4xQDWxQ/mGQhjtO8UwmZiSn5VFaBlEpk/DC 9IuWwPUGfZzhd+NU5/pbInIp7HuGcE9DeSk+m0oXKyNnxgYdO47WkGe44BT3VFsS5itDQB/Oc72cE lXJXNGPcn4qKXKIpY//7VA7eICnHZLvlGCRHRgFLoLB+TV0E8TymBFphL03DZmEHZwBoQhZ1jpFfa lyL6xcEQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1wjv1z-0000000EAOX-2xnV; Wed, 15 Jul 2026 08:31:51 +0000 Received: from sea.source.kernel.org ([2600:3c0a:e001:78e:0:1991:8:25]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1wjv1y-0000000EAOP-2OAh for linux-arm-kernel@lists.infradead.org; Wed, 15 Jul 2026 08:31:50 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 0AA0743624; Wed, 15 Jul 2026 08:31:50 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B5DA41F000E9; Wed, 15 Jul 2026 08:31:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784104309; bh=QcqaG9bdGXl50jPu/JZyaS7ewr6T+770xaHIMx0NS0Y=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=XUzAtmOxttpIajpYuy9PHtsD/bbW3lMFTsULGrMLvudH7saF0OU+fpWl05tOPF6R5 tP3keWSIwMqQ8Qx6ee5BaOdgQLqR+bNqka/rqBZpHdQOLs2mDTSYbheNF78Igp0/HA Pf4kpQpBBTUT2RpHgFJtIwPFPjufQ170EIEbnVoLc4n8lvuzFvTQ3lsnkjcazdojkk J2AkTaVg7ZHOEBORZxSngiVqpWHUvWAOIRyRnMe3zvEJYh3TXK4bc+/Am4c5Zd1x1w uw/4/J0AllxcbikrYAIxECY8JQBp/wRGpkqQX0wQKp1p9DXCEiLP32lM18eK4CXR5n MuUZZ7YqLzzMg== Date: Wed, 15 Jul 2026 09:31:31 +0100 From: "Lorenzo Stoakes (ARM)" To: Andrew Morton Cc: Suren Baghdasaryan , "Liam R. Howlett" , Vlastimil Babka , Shakeel Butt , David Hildenbrand , Mike Rapoport , Michal Hocko , Uladzislau Rezki , Toshi Kani , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , Kiryl Shutsemau , Catalin Marinas , Will Deacon , Dev Jain , Ryan Roberts , David Carlier , linux-mm@kvack.org, linux-kernel@vger.kernel.org, bpf@vger.kernel.org, linux-arm-kernel@lists.infradead.org, stable@vger.kernel.org, syzbot+fd95a72470f5a44e464c@syzkaller.appspotmail.com Subject: Re: [PATCH mm-hotfixes v3 0/4] mm: fix UAF caused by race between ptdump and vmap pgtable freeing Message-ID: References: <20260714-series-vmap-race-fix-v3-0-b812eccfa0f9@kernel.org> <20260714121102.9cb28d080556c94d45a6bc3e@linux-foundation.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260714121102.9cb28d080556c94d45a6bc3e@linux-foundation.org> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Jul 14, 2026 at 12:11:02PM -0700, Andrew Morton wrote: > On Tue, 14 Jul 2026 18:24:22 +0100 Lorenzo Stoakes wrote: > > > Kernel page table walkers fall into two broad categories - those ranges > > where no exclusion is required via walk_kernel_page_table_range_lockless() > > and those where exclusion is required via walk_kernel_page_table_range() > > or walk_page_range_debug(). > > > > ... > > > > This series works around this by #ifndef CONFIG_ARM64'ing the mmap read > > lock in vmap logic, then partially reverting commit fa93b45fd397 ("arm64: > > Enable vmalloc-huge with ptdump"), keeping the enablement of huge vmap > > support, and removing the ifdeffery with the partial revert patch. > > Thanks, I've updated mm-hotfixes-unstable. > > > v3: > > * Rebased on latest master of Linus's tree. > > * Accumulated tags, thanks everybody! > > * Reworded commit messages as per Kiryl and Boris. > > I've confirmed that v3 introduced no code alterations. Thanks!