[PATCH v2] rust: kernel: fix lifetime of copy_from_iter_raw

[Marwan Mohamed Zein <marawanzein222@gmail.com>]

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 <xuyiwen14@gmail.com>
Closes: https://github.com/Rust-for-Linux/linux/issues/1265
Signed-off-by: Marwan Mohamed Zein <marawanzein222@gmail.com>
---
 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<A: Allocator>(
     ///
     /// This will never write uninitialized bytes to the provided buffer.
     #[inline]
-    pub fn copy_from_iter_raw(&mut self, out: &mut [MaybeUninit<u8>]) -> &mut [u8] {
+    pub fn copy_from_iter_raw<'a>(&mut self, out: &'a mut [MaybeUninit<u8>]) -> &'a mut [u8] {
         let capacity = out.len();
         let out = out.as_mut_ptr().cast::<u8>();
 

base-commit: ee83899302a0457a3ba47464a13e8682bd7ba27d
-- 
2.47.3