* [merged mm-hotfixes-stable] rust-mm-mark-vmanew-as-transparent.patch removed from -mm tree
@ 2025-08-28 5:46 Andrew Morton
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From: Andrew Morton @ 2025-08-28 5:46 UTC (permalink / raw)
To: mm-commits, tmgross, stable, ojeda, lorenzo.stoakes, liam.howlett,
jannh, gary, dakr, boqun.feng, bjorn3_gh, aliceryhl, alex.gaynor,
a.hindborg, baptiste.lepers, akpm
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The quilt patch titled
Subject: rust: mm: mark VmaNew as transparent
has been removed from the -mm tree. Its filename was
rust-mm-mark-vmanew-as-transparent.patch
This patch was dropped because it was merged into the mm-hotfixes-stable branch
of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
------------------------------------------------------
From: Baptiste Lepers <baptiste.lepers@gmail.com>
Subject: rust: mm: mark VmaNew as transparent
Date: Tue, 12 Aug 2025 15:26:56 +0200
Unsafe code in VmaNew's methods assumes that the type has the same layout
as the inner `bindings::vm_area_struct`. This is not guaranteed by the
default struct representation in Rust, but requires specifying the
`transparent` representation.
Link: https://lkml.kernel.org/r/20250812132712.61007-1-baptiste.lepers@gmail.com
Fixes: dcb81aeab406 ("mm: rust: add VmaNew for f_ops->mmap()")
Signed-off-by: Baptiste Lepers <baptiste.lepers@gmail.com>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Cc: Alex Gaynor <alex.gaynor@gmail.com>
Cc: Andreas Hindborg <a.hindborg@kernel.org>
Cc: Björn Roy Baron <bjorn3_gh@protonmail.com>
Cc: Boqun Feng <boqun.feng@gmail.com>
Cc: Danilo Krummrich <dakr@kernel.org>
Cc: Gary Guo <gary@garyguo.net>
Cc: Jann Horn <jannh@google.com>
Cc: Liam Howlett <liam.howlett@oracle.com>
Cc: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>
Cc: Miguel Ojeda <ojeda@kernel.org>
Cc: Trevor Gross <tmgross@umich.edu>
Cc: <stable@vger.kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---
rust/kernel/mm/virt.rs | 1 +
1 file changed, 1 insertion(+)
--- a/rust/kernel/mm/virt.rs~rust-mm-mark-vmanew-as-transparent
+++ a/rust/kernel/mm/virt.rs
@@ -209,6 +209,7 @@ impl VmaMixedMap {
///
/// For the duration of 'a, the referenced vma must be undergoing initialization in an
/// `f_ops->mmap()` hook.
+#[repr(transparent)]
pub struct VmaNew {
vma: VmaRef,
}
_
Patches currently in -mm which might be from baptiste.lepers@gmail.com are
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