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From: "Lorenzo Stoakes (ARM)" <ljs@kernel.org>
To: Dave Hansen <dave.hansen@intel.com>
Cc: Andrew Morton <akpm@linux-foundation.org>,
	 Suren Baghdasaryan <surenb@google.com>,
	"Liam R. Howlett" <liam@infradead.org>,
	 Vlastimil Babka <vbabka@kernel.org>,
	Shakeel Butt <shakeel.butt@linux.dev>,
	 David Hildenbrand <david@kernel.org>,
	Mike Rapoport <rppt@kernel.org>, Michal Hocko <mhocko@suse.com>,
	 Uladzislau Rezki <urezki@gmail.com>,
	Toshi Kani <toshi.kani@hpe.com>,
	 Dave Hansen <dave.hansen@linux.intel.com>,
	Andy Lutomirski <luto@kernel.org>,
	 Peter Zijlstra <peterz@infradead.org>,
	Thomas Gleixner <tglx@kernel.org>,
	 Ingo Molnar <mingo@redhat.com>, Borislav Petkov <bp@alien8.de>,
	x86@kernel.org,  "H. Peter Anvin" <hpa@zytor.com>,
	Kiryl Shutsemau <kas@kernel.org>,
	 Catalin Marinas <catalin.marinas@arm.com>,
	Will Deacon <will@kernel.org>, Dev Jain <dev.jain@arm.com>,
	 Ryan Roberts <ryan.roberts@arm.com>,
	David Carlier <devnexen@gmail.com>,
	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
Date: Wed, 15 Jul 2026 08:28:39 +0100	[thread overview]
Message-ID: <alc0YTcSVuBMdo8A@lucifer> (raw)
In-Reply-To: <e2d9f516-2dae-4356-830a-14b99fd32a90@intel.com>

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

  reply	other threads:[~2026-07-15  7:28 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-07-14 17:24 [PATCH mm-hotfixes v3 0/4] mm: fix UAF caused by race between ptdump and vmap pgtable freeing Lorenzo Stoakes
2026-07-14 17:24 ` [PATCH mm-hotfixes v3 1/4] mm/vmalloc: acquire init_mm lock on huge vmap to avoid ptdump UAF Lorenzo Stoakes
2026-07-14 17:40   ` sashiko-bot
2026-07-15 10:34   ` Kiryl Shutsemau
2026-07-15 14:16     ` Lorenzo Stoakes (ARM)
2026-07-14 17:24 ` [PATCH mm-hotfixes v3 2/4] x86/mm/pat: acquire mmap lock on page table free " Lorenzo Stoakes
2026-07-14 17:29   ` Dave Hansen
2026-07-15  8:49     ` Lorenzo Stoakes (ARM)
2026-07-15 15:24   ` Will Deacon
2026-07-15 15:49     ` Mike Rapoport
2026-07-14 17:24 ` [PATCH mm-hotfixes v3 3/4] mm/ptdump: always stabilise against page table freeing using init_mm Lorenzo Stoakes
2026-07-15 10:36   ` Kiryl Shutsemau
2026-07-14 17:24 ` [PATCH mm-hotfixes v3 4/4] arm64: remove redundant concurrent ptdump UAF mitigation Lorenzo Stoakes
2026-07-14 17:31 ` [PATCH mm-hotfixes v3 0/4] mm: fix UAF caused by race between ptdump and vmap pgtable freeing Dave Hansen
2026-07-15  7:28   ` Lorenzo Stoakes (ARM) [this message]
2026-07-14 19:11 ` Andrew Morton
2026-07-15  8:31   ` Lorenzo Stoakes (ARM)

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