From: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
To: Peter Xu <peterx@redhat.com>
Cc: Suren Baghdasaryan <surenb@google.com>,
Mike Rapoport <rppt@kernel.org>,
linux-mm@kvack.org, linux-kernel@vger.kernel.org,
Vlastimil Babka <vbabka@suse.cz>,
Muchun Song <muchun.song@linux.dev>,
Hugh Dickins <hughd@google.com>,
Andrew Morton <akpm@linux-foundation.org>,
James Houghton <jthoughton@google.com>,
"Liam R . Howlett" <Liam.Howlett@oracle.com>,
Nikita Kalyazin <kalyazin@amazon.com>,
Michal Hocko <mhocko@suse.com>,
David Hildenbrand <david@redhat.com>,
Andrea Arcangeli <aarcange@redhat.com>,
Oscar Salvador <osalvador@suse.de>,
Axel Rasmussen <axelrasmussen@google.com>,
Ujwal Kundur <ujwal.kundur@gmail.com>
Subject: Re: [PATCH v2 1/4] mm: Introduce vm_uffd_ops API
Date: Thu, 3 Jul 2025 17:01:54 +0100 [thread overview]
Message-ID: <e9235b88-e2be-4358-a6fb-507c5cad6fd9@lucifer.local> (raw)
In-Reply-To: <aGalpN8m73zQOW7j@x1.local>
On Thu, Jul 03, 2025 at 11:45:40AM -0400, Peter Xu wrote:
> I still feel like we're over-worried on this. For OOT drivers I never
> cared breaking anything. For in-tree ones, this discussion can really
> happen when there's a need to. And at that time we can also have a look at
> the impl using uffd_copy(), maybe it'll not be that bad either. It seems
> to me we don't necessarily need to figure this out right now. IMHO we can
> do it two-steps in worst case.
This kind of approach in relation to f_op->mmap() is precisely how I ended
up being cc'd on an embargoed report of a critical zero-day security flaw.
So I think if anything there is under-worrying going on here.
next prev parent reply other threads:[~2025-07-03 16:02 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-06-27 15:46 [PATCH v2 0/4] mm/userfaultfd: modulize memory types Peter Xu
2025-06-27 15:46 ` [PATCH v2 1/4] mm: Introduce vm_uffd_ops API Peter Xu
2025-06-29 8:50 ` Mike Rapoport
2025-07-02 19:30 ` Peter Xu
2025-06-30 10:15 ` Lorenzo Stoakes
2025-07-01 17:04 ` Suren Baghdasaryan
2025-07-02 15:40 ` Liam R. Howlett
2025-07-02 15:56 ` Lorenzo Stoakes
2025-07-02 17:08 ` Nikita Kalyazin
2025-07-02 17:39 ` Mike Rapoport
2025-07-02 19:46 ` Peter Xu
2025-07-03 17:48 ` Mike Rapoport
2025-07-04 9:34 ` David Hildenbrand
2025-07-04 14:59 ` Peter Xu
2025-07-04 19:39 ` Liam R. Howlett
2025-09-01 16:01 ` Nikita Kalyazin
2025-07-02 21:24 ` Liam R. Howlett
2025-07-02 21:36 ` Peter Xu
2025-07-03 2:00 ` Liam R. Howlett
2025-07-03 15:24 ` Peter Xu
2025-07-03 16:15 ` Lorenzo Stoakes
2025-07-03 17:39 ` Liam R. Howlett
2025-07-02 20:24 ` Peter Xu
2025-07-03 16:32 ` Lorenzo Stoakes
2025-07-02 18:16 ` Mike Rapoport
2025-07-02 20:22 ` Peter Xu
2025-07-03 15:01 ` Suren Baghdasaryan
2025-07-03 15:45 ` Peter Xu
2025-07-03 16:01 ` Lorenzo Stoakes [this message]
2025-06-27 15:46 ` [PATCH v2 2/4] mm/shmem: Support " Peter Xu
2025-06-29 8:51 ` Mike Rapoport
2025-06-27 15:46 ` [PATCH v2 3/4] mm/hugetlb: " Peter Xu
2025-06-29 8:52 ` Mike Rapoport
2025-06-27 15:46 ` [PATCH v2 4/4] mm: Apply vm_uffd_ops API to core mm Peter Xu
2025-06-29 8:55 ` Mike Rapoport
2025-07-02 20:38 ` Peter Xu
2025-06-30 10:29 ` [PATCH v2 0/4] mm/userfaultfd: modulize memory types Lorenzo Stoakes
2025-07-01 0:15 ` Andrew Morton
2025-07-02 20:36 ` Peter Xu
2025-07-03 15:55 ` Lorenzo Stoakes
2025-07-03 16:26 ` Peter Xu
2025-07-03 16:44 ` Lorenzo Stoakes
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