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Sat, 14 Nov 2026 05:22:00 -0800 (PST) Received: from martell.martell0x1 ([156.211.252.144]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4bb4e2538b9sm379872675e9.1.2026.11.14.05.21.59 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 14 Nov 2026 05:22:00 -0800 (PST) From: Marwan Mohamed Zein To: ojeda@kernel.org Cc: rust-for-linux@vger.kernel.org, linux-kernel@vger.kernel.org, stable@vger.kernel.org, boqun@kernel.org, gary@garyguo.net, bjorn3_gh@protonmail.com, lossin@kernel.org, a.hindborg@kernel.org, aliceryhl@google.com, tmgross@umich.edu, dakr@kernel.org, daniel.almeida@collabora.com, tamir@kernel.org, acourbot@nvidia.com, work@onurozkan.dev, Marwan Mohamed Zein , spidermana Subject: [PATCH v2] rust: kernel: fix lifetime of copy_from_iter_raw Date: Sat, 14 Nov 2026 15:21:55 +0200 Message-ID: <20261114132156.49243-1-marawanzein222@gmail.com> X-Mailer: git-send-email 2.47.3 In-Reply-To: References: X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 Content-Transfer-Encoding: 8bit The returned slice is derived from `out`, but lifetime elision ties it to `self` because this is a method. Explicitly bind the return lifetime to `out` so the returned slice cannot outlive its backing buffer. Fixes: 06cb58b310ea ("rust: iov: add iov_iter abstractions for ITER_SOURCE") Cc: stable@vger.kernel.org Reported-by: spidermana Closes: https://github.com/Rust-for-Linux/linux/issues/1265 Signed-off-by: Marwan Mohamed Zein --- v2: - Use full name in author and sign-off. - Add Fixes and Cc: stable tags as suggested by Miguel Ojeda. rust/kernel/iov.rs | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/rust/kernel/iov.rs b/rust/kernel/iov.rs index 43bae8923..8caf04518 100644 --- a/rust/kernel/iov.rs +++ b/rust/kernel/iov.rs @@ -161,7 +161,7 @@ pub fn copy_from_iter_vec( /// /// This will never write uninitialized bytes to the provided buffer. #[inline] - pub fn copy_from_iter_raw(&mut self, out: &mut [MaybeUninit]) -> &mut [u8] { + pub fn copy_from_iter_raw<'a>(&mut self, out: &'a mut [MaybeUninit]) -> &'a mut [u8] { let capacity = out.len(); let out = out.as_mut_ptr().cast::(); base-commit: ee83899302a0457a3ba47464a13e8682bd7ba27d -- 2.47.3