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
next prev parent reply other threads:[~2026-07-15 7:28 UTC|newest]
Thread overview: 13+ 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
2026-07-15 10:34 ` Kiryl Shutsemau
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)
2026-07-14 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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