From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-alma10-1.taild15c8.ts.net [100.103.45.18]) (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 A917F3C1983; Wed, 15 Jul 2026 07:28:57 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=100.103.45.18 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784100539; cv=none; b=D683zEMMKeOPQuV2TvXUHvyYhc4PGLkVhTdwuWcqqZ7/JzXl+mnxZDt8Ndsd+u+AjeCexlo1X8JFLhtsG7SRCjmJsaKZHfC6vkYOaUE4nNL/zntA8JSRrENHHAzvBw/yzw23A+Eoxqfe/ycC9TTV2Xug+6CYYyjFv4TvXg9FHys= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1784100539; c=relaxed/simple; bh=6X3BfS/vlKMVeP0+vXeVJjquysDomjXRdgpvx3atWI4=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=nWQIuwQGJRJpP6dhtdJu+20iUACVUs6uIMOdkSaDMsg7PwPG3WCFWiw3GVkMXwIcoWoF+hkkqsCF6yVyy4O800LJKpSbDOHZDqSvvNgM3KRh94KZqqLSvMeV+o50wyCFlLmRkOUt0UIG/bZxsjahw7B7rPIZt9lH7accLd1OvjQ= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=KCWKi30M; arc=none smtp.client-ip=100.103.45.18 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="KCWKi30M" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 226311F000E9; Wed, 15 Jul 2026 07:28:50 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1784100536; bh=Vk/Pmtw5V1S5Wy95XZKiQxPxVWpzziuE+PvkoAYgcUs=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=KCWKi30MM2OO4LbExOFY2K96V4NJnrOuSYk2LaflLMjhkhQxOtZ8oF5qHjCyMhZjy fPI9vhQ68B18TFLQc3JbwI/Bza/bFsu5vcGWnxMof6ezZ2Al6zMpJSuqppPOTYXzYT 8+D5XxspV4qS44G7arRn0036MucchjV9d63PSsiJbu1DSE6GwYB0emo7MC2q4heaGB TKK6px3LaBeex8N46xrQYxluBESDOGdkya0vb+VTMG0INmsmp1l+C1gSOSe8CTqgcr pRlVqlQ7TMusHrBvhsj2AwYxV1OOC6mM8wt75yCtk/bubtRjZK+Pe103PlnYk0FR5u LwNn3Od+F1tEg== Date: Wed, 15 Jul 2026 08:28:39 +0100 From: "Lorenzo Stoakes (ARM)" To: Dave Hansen Cc: Andrew Morton , 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> Precedence: bulk X-Mailing-List: bpf@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: On Tue, Jul 14, 2026 at 10:31:52AM -0700, Dave Hansen wrote: > On 7/14/26 10:24, Lorenzo Stoakes wrote: > > arch/arm64/include/asm/ptdump.h | 2 -- > > arch/arm64/mm/mmu.c | 43 ++++------------------------------------- > > arch/arm64/mm/ptdump.c | 11 ++--------- > > arch/x86/mm/pat/set_memory.c | 14 +++++++++++--- > > include/linux/mmap_lock.h | 1 + > > mm/pagewalk.c | 36 ++++++++++++++++++++-------------- > > mm/ptdump.c | 7 +++++++ > > mm/vmalloc.c | 41 ++++++++++++++++++++++++++++++--------- > > 8 files changed, 78 insertions(+), 77 deletions(-) > > BTW, this is super nice. It fixes a bug, makes the architectures more > consistent, and is effectively neutral on lines-of-code. > > Very cool. Thanks very much Dave, that's very kind of you to say :) Cheers, Lorenzo