From: Andrew Morton <akpm@linux-foundation.org>
To: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Jonathan Corbet <corbet@lwn.net>,
Matthew Wilcox <willy@infradead.org>, Guo Ren <guoren@kernel.org>,
Thomas Bogendoerfer <tsbogend@alpha.franken.de>,
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Sumanth Korikkar <sumanthk@linux.ibm.com>
Subject: Re: [PATCH v5 00/15] expand mmap_prepare functionality, port more users
Date: Mon, 20 Oct 2025 11:16:09 -0700 [thread overview]
Message-ID: <20251020111609.cfafaa22c20ac33be573898f@linux-foundation.org> (raw)
In-Reply-To: <cover.1760959441.git.lorenzo.stoakes@oracle.com>
On Mon, 20 Oct 2025 13:11:17 +0100 Lorenzo Stoakes <lorenzo.stoakes@oracle.com> wrote:
> Since commit c84bf6dd2b83 ("mm: introduce new .mmap_prepare() file
> callback"), The f_op->mmap hook has been deprecated in favour of
> f_op->mmap_prepare.
>
> This was introduced in order to make it possible for us to eventually
> eliminate the f_op->mmap hook which is highly problematic as it allows
> drivers and filesystems raw access to a VMA which is not yet correctly
> initialised.
>
> This hook also introduced complexity for the memory mapping operation, as
> we must correctly unwind what we do should an error arises.
>
> Overall this interface being so open has caused significant problems for
> us, including security issues, it is important for us to simply eliminate
> this as a source of problems.
>
> Therefore this series continues what was established by extending the
> functionality further to permit more drivers and filesystems to use
> mmap_prepare.
Thanks, I (re-)added this series to mm.git. I suppressed the usual
emails.
prev parent reply other threads:[~2025-10-20 18:16 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-10-20 12:11 [PATCH v5 00/15] expand mmap_prepare functionality, port more users Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 01/15] mm/shmem: update shmem to use mmap_prepare Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 02/15] device/dax: update devdax " Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 03/15] mm/vma: remove unused function, make internal functions static Lorenzo Stoakes
2025-10-20 14:07 ` Jason Gunthorpe
2025-10-20 12:11 ` [PATCH v5 04/15] mm: add vma_desc_size(), vma_desc_pages() helpers Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 05/15] relay: update relay to use mmap_prepare Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 06/15] mm/vma: rename __mmap_prepare() function to avoid confusion Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 07/15] mm: add remap_pfn_range_prepare(), remap_pfn_range_complete() Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 08/15] mm: abstract io_remap_pfn_range() based on PFN Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 09/15] mm: introduce io_remap_pfn_range_[prepare, complete]() Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 10/15] mm: add ability to take further action in vm_area_desc Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 11/15] doc: update porting, vfs documentation for mmap_prepare actions Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 12/15] mm/hugetlbfs: update hugetlbfs to use mmap_prepare Lorenzo Stoakes
2025-10-20 13:39 ` Sumanth Korikkar
2025-10-20 14:13 ` Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 13/15] mm: add shmem_zero_setup_desc() Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 14/15] mm: update mem char driver to use mmap_prepare Lorenzo Stoakes
2025-10-20 12:11 ` [PATCH v5 15/15] mm: update resctl " Lorenzo Stoakes
2025-10-20 18:16 ` Andrew Morton [this message]
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