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block: replace as <pointer> casts with safer alternatives

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`as` casts can change mutability, which quickly leads to undefined
behavior.

Signed-off-by: Julian Schindel <mail@arctic-alpaca.de>
This commit is contained in:
Julian Schindel
2026-04-29 21:55:06 +02:00
committed by Rob Bradford
parent 7455ff1ea4
commit 2b6e9df4e3
8 changed files with 37 additions and 47 deletions
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16
block/src/qcow_sync.rs
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@@ -353,7 +353,7 @@ mod unit_tests {
let mut async_io = disk.create_async_io(1).unwrap();
let mut buf = vec![0xFFu8; len];
let iovec = libc::iovec {
iov_base: buf.as_mut_ptr() as *mut libc::c_void,
iov_base: buf.as_mut_ptr().cast(),
iov_len: buf.len(),
};
async_io
@@ -368,7 +368,7 @@ mod unit_tests {
fn async_write(disk: &QcowDisk, offset: u64, data: &[u8]) {
let mut async_io = disk.create_async_io(1).unwrap();
let iovec = libc::iovec {
iov_base: data.as_ptr() as *mut libc::c_void,
iov_base: data.as_ptr().cast::<libc::c_void>().cast_mut(),
iov_len: data.len(),
};
async_io
@@ -1550,15 +1550,15 @@ mod unit_tests {
let c = vec![0xCCu8; 16 * 1024];
let iovecs_w = [
libc::iovec {
iov_base: a.as_ptr() as *mut libc::c_void,
iov_base: a.as_ptr().cast::<libc::c_void>().cast_mut(),
iov_len: a.len(),
},
libc::iovec {
iov_base: b.as_ptr() as *mut libc::c_void,
iov_base: b.as_ptr().cast::<libc::c_void>().cast_mut(),
iov_len: b.len(),
},
libc::iovec {
iov_base: c.as_ptr() as *mut libc::c_void,
iov_base: c.as_ptr().cast::<libc::c_void>().cast_mut(),
iov_len: c.len(),
},
];
@@ -1578,15 +1578,15 @@ mod unit_tests {
let mut r3 = vec![0u8; 8 * 1024];
let iovecs_r = [
libc::iovec {
iov_base: r1.as_mut_ptr() as *mut libc::c_void,
iov_base: r1.as_mut_ptr().cast(),
iov_len: r1.len(),
},
libc::iovec {
iov_base: r2.as_mut_ptr() as *mut libc::c_void,
iov_base: r2.as_mut_ptr().cast(),
iov_len: r2.len(),
},
libc::iovec {
iov_base: r3.as_mut_ptr() as *mut libc::c_void,
iov_base: r3.as_mut_ptr().cast(),
iov_len: r3.len(),
},
];