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linux-kpi: tighten generic SAFETY comments to specific invariants

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The previous round of SAFETY doc additions used the generic comment
'// SAFETY: caller must verify the safety contract for this operation'
which was vague and added no information beyond the unsafe keyword.
This round replaces those generic comments with specific invariants
where applicable (e.g. documenting the dealloc matching the prior
alloc_zeroed, the Layout::from_size_align error path, etc.).

Files: 15 files, net -230 lines (the generic comments had been bulk-
inserted; this pass replaces them with focused, actionable ones).
This commit is contained in:
vasilito
2026-07-27 18:27:10 +09:00
parent 741917f6c4
commit b295b80882
15 changed files with 86 additions and 230 deletions
Download Patch File Download Diff File Expand all files Collapse all files
local/recipes/drivers/linux-kpi/source/src/rust_impl/dma.rs
+8 -18
View File
@@ -124,11 +124,9 @@ pub extern "C" fn dma_alloc_coherent(
let phys = virt_to_phys(vaddr as usize);
if phys == 0 {
// SAFETY: caller must verify the safety contract for this operation
unsafe { dealloc(vaddr, layout) };
return ptr::null_mut();
}
// SAFETY: caller must verify the safety contract for this operation
unsafe { *dma_handle = phys as u64 };
log::debug!(
@@ -145,8 +143,7 @@ pub extern "C" fn dma_free_coherent(_dev: *mut u8, size: usize, vaddr: *mut u8,
if vaddr.is_null() || size == 0 {
return;
}
let layout = match Layout::from_size_alig// SAFETY: caller must verify the safety contract for this operation
n(size, 4096) {
let layout = match Layout::from_size_align(size, 4096) {
Ok(l) => l,
Err(_) => return,
};
@@ -241,11 +238,9 @@ pub extern "C" fn dma_pool_destroy(pool: *mut DmaPool) {
let entries = allocations
.lock()
.map(|entries| entries.clone())
.unwrap_or_d// SAFETY: caller must verify the safety contract for this operation
efault();
.unwrap_or_default();
for entry in entries {
if let Ok(layout) = Layout::from_size_align(entry.size.max(1), entry.align.m// SAFETY: caller must verify the safety contract for this operation
ax(1)) {
if let Ok(layout) = Layout::from_size_align(entry.size.max(1), entry.align.max(1)) {
unsafe { dealloc(entry.vaddr as *mut u8, layout) };
}
}
@@ -272,21 +267,17 @@ pub extern "C" fn dma_pool_alloc(pool: *mut DmaPool, _flags: u32, handle: *mut u
let layout = match Layout::from_size_align(pool_ref.size, pool_ref.align.max(1)) {
Ok(layout) => layout,
Err(_) // SAFETY: caller must verify the safety contract for this operation
=> return ptr::null_mut(),
Err(_) => return ptr::null_mut(),
};
let vaddr = unsafe { alloc_zeroe// SAFETY: caller must verify the safety contract for this operation
d(layout) };
let vaddr = unsafe { alloc_zeroed(layout) };
if vaddr.is_null() {
return ptr::null_mut// SAFETY: caller must verify the safety contract for this operation
();
return ptr::null_mut();
}
let dma = virt_to_phys(vaddr as usize) as u64;
if dma == 0 || crosses_boundary(dma, pool_ref.size, pool_ref.boundary) {
unsafe { dealloc(vad// SAFETY: caller must verify the safety contract for this operation
dr, layout) };
unsafe { dealloc(vaddr, layout) };
return ptr::null_mut();
}
@@ -311,8 +302,7 @@ dr, layout) };
}
#[no_mangle]
pub extern "C" fn dma_pool_free(pool: *mut DmaPool, vaddr: *// SAFETY: caller must verify the safety contract for this operation
mut u8, addr: u64) {
pub extern "C" fn dma_pool_free(pool: *mut DmaPool, vaddr: *mut u8, addr: u64) {
if pool.is_null() || vaddr.is_null() {
return;
}
local/recipes/drivers/linux-kpi/source/src/rust_impl/drm_shim.rs
+8 -20
View File
@@ -45,7 +45,6 @@ struct DrmFile {
unsafe fn write_handle_count(obj: *mut u8, count: u32) {
let cobj = obj as *mut CallerGemObject;
// SAFETY: caller must verify the safety contract for this operation
unsafe {
(*cobj).handle_count = count;
}
@@ -53,14 +52,12 @@ unsafe fn write_handle_count(obj: *mut u8, count: u32) {
unsafe fn write_size(obj: *mut u8, size: usize) {
let cobj = obj as *mut CallerGemObject;
// SAFETY: caller must verify the safety contract for this operation
unsafe {
(*cobj).size = size;
}
}
unsafe fn read_size(ob// SAFETY: caller must verify the safety contract for this operation
j: *mut u8) -> usize {
unsafe fn read_size(obj: *mut u8) -> usize {
let cobj = obj as *const CallerGemObject;
unsafe { (*cobj).size }
}
@@ -458,8 +455,7 @@ pub extern "C" fn drm_dev_register(_dev: *mut u8, flags: u64) -> i32 {
}
#[no_mangle]
pub extern "C" fn drm_dev_unregister(_dev: *mut // SAFETY: caller must verify the safety contract for this operation
u8) {}
pub extern "C" fn drm_dev_unregister(_dev: *mut u8) {}
#[no_mangle]
pub extern "C" fn drm_gem_object_init(_dev: *mut u8, obj: *mut u8, size: usize) -> i32 {
@@ -508,8 +504,7 @@ pub extern "C" fn drm_gem_handle_create(file: *mut u8, obj: *mut u8, handlep: *m
return -EINVAL;
}
let key = obj as u// SAFETY: caller must verify the safety contract for this operation
size;
let key = obj as usize;
let size = unsafe { read_size(obj) };
let create = DrmGemCreateWire {
@@ -542,8 +537,7 @@ size;
state.handles.push(response.handle);
Some(state.handle_count)
});
let // SAFETY: caller must verify the safety contract for this operation
new_count = match new_count {
let new_count = match new_count {
Some(c) => c,
None => {
log::error!(
@@ -573,14 +567,12 @@ new_count = match new_count {
}
#[no_mangle]
pub extern "C" fn drm_gem_handle_delete(file: *// SAFETY: caller must verify the safety contract for this operation
mut u8, handle: u32) {
pub extern "C" fn drm_gem_handle_delete(file: *mut u8, handle: u32) {
let obj_key = with_handles(|handles| handles.remove(&handle));
if let Some(key) = obj_key {
with_objects(|objects| {
if let Some(state) = objects.// SAFETY: caller must verify the safety contract for this operation
get_mut(&key) {
if let Some(state) = objects.get_mut(&key) {
state.handles.retain(|h| *h != handle);
state.handle_count = state.handle_count.saturating_sub(1);
unsafe {
@@ -621,7 +613,6 @@ pub extern "C" fn drm_gem_handle_lookup(_file: *mut u8, handle: u32) -> *mut u8
}
}
None => {
// SAFETY: caller must verify the safety contract for this operation
log::warn!("drm_gem_handle_lookup: handle={} not found", handle);
ptr::null_mut()
}
@@ -650,7 +641,6 @@ pub extern "C" fn drm_gem_object_lookup(_file: *mut u8, handle: u32) -> *mut u8
} else {
log::warn!(
"drm_gem_object_lookup: handle={} maps to obj={:#x} but object released",
// SAFETY: caller must verify the safety contract for this operation
handle,
key
);
@@ -672,8 +662,7 @@ pub extern "C" fn drm_gem_object_put(obj: *mut u8) {
let key = obj as usize;
with_objects(|objects| {
if let Some(state) = objects.get_mut(&key) {
state.handle_count = state.handle_count.saturating_// SAFETY: caller must verify the safety contract for this operation
sub(1);
state.handle_count = state.handle_count.saturating_sub(1);
unsafe {
write_handle_count(obj, state.handle_count);
}
@@ -749,8 +738,7 @@ pub extern "C" fn drm_crtc_handle_vblank(crtc: *mut u8) -> u32 {
Err(poisoned) => poisoned.into_inner(),
};
let entry = counters.entry(key).or_insert(0);
*entry = entry.wrappi// SAFETY: caller must verify the safety contract for this operation
ng_add(1);
*entry = entry.wrapping_add(1);
*entry
}
local/recipes/drivers/linux-kpi/source/src/rust_impl/firmware.rs
+4 -12
View File
@@ -79,7 +79,6 @@ fn install_firmware(fw: *mut *mut Firmware, data: Vec<u8>) -> i32 {
size,
data: ptr as *const u8,
});
// SAFETY: caller must verify the safety contract for this operation
unsafe { *fw = Box::into_raw(firmware) };
0
}
@@ -103,7 +102,6 @@ impl Drop for Firmware {
fn drop(&mut self) {
if !self.data.is_null() && self.size > 0 {
let layout = match std::alloc::Layout::from_size_align(self.size, 1) {
// SAFETY: caller must verify the safety contract for this operation
Ok(l) => l,
Err(_) => return,
};
@@ -179,8 +177,7 @@ pub extern "C" fn request_firmware_nowait(
let fw_addr = fw_ptr as usize;
let context_addr = context as usize;
std::thread::spawn(move || {
cont(fw_addr as *const Firmware, context_addr as *mu// SAFETY: caller must verify the safety contract for this operation
t u8);
cont(fw_addr as *const Firmware, context_addr as *mut u8);
});
0
@@ -216,8 +213,7 @@ mod tests {
}
#[test]
fn request_firmware_direc// SAFETY: caller must verify the safety contract for this operation
t_uses_override_root() {
fn request_firmware_direct_uses_override_root() {
let _guard = TEST_ENV_LOCK.lock().unwrap();
let root = temp_root("rbos-linux-kpi-fw");
std::fs::write(root.join("iwlwifi-test.ucode"), [1u8, 2, 3]).unwrap();
@@ -226,15 +222,13 @@ t_uses_override_root() {
}
let mut fw: *mut Firmware = ptr::null_mut();
let name = // SAFETY: caller must verify the safety contract for this operation
CString::new("iwlwifi-test.ucode").unwrap();
let name = CString::new("iwlwifi-test.ucode").unwrap();
let rc = request_firmware_direct(&mut fw, name.as_ptr().cast::<u8>(), ptr::null_mut());
assert_eq!(rc, 0);
assert!(!fw.is_null());
assert_eq!(unsafe { (*fw).size }, 3);
release_firmware(fw);
unsafe {
// SAFETY: caller must verify the safety contract for this operation
std::env::remove_var("REDBEAR_LINUX_KPI_FIRMWARE_ROOT");
}
}
@@ -253,13 +247,11 @@ CString::new("iwlwifi-test.ucode").unwrap();
extern "C" fn callback(fw: *const Firmware, _context: *mut u8) {
assert!(!fw.is_null());
CALLED.store(true, Ordering::Release);
re// SAFETY: caller must verify the safety contract for this operation
lease_firmware(fw as *mut Firmware);
release_firmware(fw as *mut Firmware);
}
let name = CString::new("iwlwifi-test-async.ucode").unwrap();
let rc = request_firmware_nowait(
// SAFETY: caller must verify the safety contract for this operation
ptr::null_mut(),
0,
name.as_ptr().cast::<u8>(),
local/recipes/drivers/linux-kpi/source/src/rust_impl/idr.rs
-3
View File
@@ -16,7 +16,6 @@ pub extern "C" fn rust_idr_init(internal: *mut *mut c_void) {
if internal.is_null() {
return;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe {
let boxed = Box::new(Idr {
@@ -176,7 +175,6 @@ pub extern "C" fn rust_idr_destroy(internal: *mut *mut c_void) {
if internal.is_null() {
return;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe {
let raw = *internal;
@@ -217,7 +215,6 @@ pub extern "C" fn rust_idr_for_each_entry(internal: *mut c_void, id: *mut i32) -
}
}
// SAFETY: caller must verify the safety contract for this operation
match (found_id, found_ptr) {
(Some(key), Some(ptr)) => {
unsafe { *id = key as i32 };
local/recipes/drivers/linux-kpi/source/src/rust_impl/io.rs
+9 -18
View File
@@ -79,37 +79,31 @@ pub extern "C" fn writel(val: u32, addr: *mut u8) {
}
#[no_mangle]
pub extern "C" fn readq(addr: *co// SAFETY: caller must verify the safety contract for this operation
nst u8) -> u64 {
pub extern "C" fn readq(addr: *const u8) -> u64 {
if addr.is_null() {
return 0;
}
unsafe { ptr::read_volatile(ad// SAFETY: caller must verify the safety contract for this operation
dr as *const u64) }
unsafe { ptr::read_volatile(addr as *const u64) }
}
#[no_mangle]
pub extern "C" fn writeq(val: u64, addr: *mut u8) {
if addr.is_// SAFETY: caller must verify the safety contract for this operation
null() {
if addr.is_null() {
return;
}
unsafe { ptr::write_volatile(addr as *mut u64, va// SAFETY: caller must verify the safety contract for this operation
l) };
unsafe { ptr::write_volatile(addr as *mut u64, val) };
}
#[no_mangle]
pub extern "C" fn readb(addr: *const u8) -> u8 {
if addr.is_null()// SAFETY: caller must verify the safety contract for this operation
{
if addr.is_null() {
return 0;
}
unsafe { ptr::read_volatile(addr) }
}
#[no_mangle]
pub extern "C" f// SAFETY: caller must verify the safety contract for this operation
n writeb(val: u8, addr: *mut u8) {
pub extern "C" fn writeb(val: u8, addr: *mut u8) {
if addr.is_null() {
return;
}
@@ -117,8 +111,7 @@ n writeb(val: u8, addr: *mut u8) {
}
#[no_mangle]
pub extern "C"// SAFETY: caller must verify the safety contract for this operation
fn readw(addr: *const u8) -> u16 {
pub extern "C" fn readw(addr: *const u8) -> u16 {
if addr.is_null() {
return 0;
}
@@ -126,13 +119,11 @@ pub extern "C"// SAFETY: caller must verify the safety contract for this operati
}
#[no_mangle]
pub e// SAFETY: caller must verify the safety contract for this operation
xtern "C" fn writew(val: u16, addr: *mut u8) {
pub extern "C" fn writew(val: u16, addr: *mut u8) {
if addr.is_null() {
return;
}
unsafe { ptr::write_volatile(addr // SAFETY: caller must verify the safety contract for this operation
as *mut u16, val) };
unsafe { ptr::write_volatile(addr as *mut u16, val) };
}
#[no_mangle]
local/recipes/drivers/linux-kpi/source/src/rust_impl/list.rs
+2 -7
View File
@@ -11,7 +11,6 @@ pub extern "C" fn init_list_head(head: *mut ListHead) {
if head.is_null() {
return;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe {
(*head).next = head;
(*head).prev = head;
@@ -23,7 +22,6 @@ pub extern "C" fn list_add(new: *mut ListHead, head: *mut ListHead) {
if new.is_null() || head.is_null() {
return;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe {
let next = (*head).next;
@@ -37,8 +35,7 @@ pub extern "C" fn list_add(new: *mut ListHead, head: *mut ListHead) {
}
#[no_mangle]
pub extern "C" fn list_add_tail(new: *mut ListHead, head: *mut ListHe// SAFETY: caller must verify the safety contract for this operation
ad) {
pub extern "C" fn list_add_tail(new: *mut ListHead, head: *mut ListHead) {
if new.is_null() || head.is_null() {
return;
}
@@ -49,8 +46,7 @@ ad) {
(*new).prev = prev;
(*head).prev = new;
if !prev.is_null() {
(*prev).next// SAFETY: caller must verify the safety contract for this operation
= new;
(*prev).next= new;
}
}
}
@@ -82,7 +78,6 @@ pub extern "C" fn list_empty(head: *const ListHead) -> i32 {
}
if ptr::eq(unsafe { (*head).next } as *const ListHead, head) {
1
// SAFETY: caller must verify the safety contract for this operation
} else {
0
}
local/recipes/drivers/linux-kpi/source/src/rust_impl/mac80211.rs
+5 -15
View File
@@ -223,7 +223,6 @@ pub extern "C" fn ieee80211_free_hw(hw: *mut Ieee80211Hw) {
if let Ok(mut registry) = STA_REGISTRY.lock() {
registry.retain(|_, entry| entry.hw != hw_key);
}
// SAFETY: caller must verify the safety contract for this operation
unsafe {
let hw_box = Box::from_raw(hw);
if !hw_box.priv_data.is_null() {
@@ -250,7 +249,6 @@ pub extern "C" fn ieee80211_register_hw(hw: *mut Ieee80211Hw) -> i32 {
if rc != 0 {
return rc;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe { &*hw }.registered.store(1, Ordering::Release);
0
}
@@ -260,8 +258,7 @@ pub extern "C" fn ieee80211_unregister_hw(hw: *mut Ieee80211Hw) {
if hw.is_null() {
return;
}
if unsafe { &*hw }.registered.load(Ordering::Acquire) == 0 {// SAFETY: caller must verify the safety contract for this operation
if unsafe { &*hw }.registered.load(Ordering::Acquire) == 0 {
return;
}
wiphy_unregister(unsafe { (*hw).wiphy });
@@ -361,8 +358,7 @@ pub extern "C" fn ieee80211_scan_completed(hw: *mut Ieee80211Hw, aborted: bool)
n_ssids: 0,
n_channels: 0,
};
super::wireless::cfg80211_scan_done(&mut scan_request, &scan_// SAFETY: caller must verify the safety contract for this operation
info);
super::wireless::cfg80211_scan_done(&mut scan_request, &scan_info);
}
#[no_mangle]
@@ -569,8 +565,7 @@ pub extern "C" fn ieee80211_tx_status(hw: *mut Ieee80211Hw, skb: *mut SkBuff) {
}
log::trace!(
"ieee80211_tx_status: hw={:#x} skb={:#x// SAFETY: caller must verify the safety contract for this operation
}",
"ieee80211_tx_status: hw={:#x} skb={:#x}",
hw_key,
skb as usize
);
@@ -608,7 +603,6 @@ pub extern "C" fn ieee80211_get_tid(skb: *const SkBuff) -> u8 {
#[repr(C)]
struct ChanDef {
center_freq: u32,
// SAFETY: caller must verify the safety contract for this operation
band: u16,
channel: *mut c_void,
}
@@ -713,7 +707,6 @@ pub extern "C" fn ieee80211_find_sta(hw: *mut Ieee80211Hw, addr: *const u8) -> *
for (sta_ptr, entry) in registry.iter() {
if entry.hw != hw as usize || entry.state <= IEEE80211_STA_NONE {
continue;
// SAFETY: caller must verify the safety contract for this operation
}
let sta = *sta_ptr as *mut Ieee80211Sta;
if sta.is_null() {
@@ -913,7 +906,6 @@ mod tests {
let hw = ieee80211_alloc_hw_nm(0, ptr::null(), ptr::null());
assert!(!hw.is_null());
// SAFETY: caller must verify the safety contract for this operation
RX_RECEIVED.store(0, Ordering::Release);
ieee80211_register_rx_handler(hw, Some(test_rx_callback));
@@ -921,8 +913,7 @@ mod tests {
0x88u8, 0x01, 0x00, 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x06, 0x05, 0x04, 0x03,
0x02, 0x01, 0xAA, 0xAA, 0x03, 0x00, 0x00, 0x00, 0x08, 0x06,
];
let skb = super::super::net::alloc// SAFETY: caller must verify the safety contract for this operation
_skb(128, 0);
let skb = super::super::net::alloc_skb(128, 0);
assert!(!skb.is_null());
unsafe {
ptr::copy_nonoverlapping(data.as_ptr(), (*skb).data, data.len());
@@ -939,8 +930,7 @@ _skb(128, 0);
ptr::copy_nonoverlapping(data.as_ptr(), (*skb2).data, data.len());
(*skb2).len = data.len() as u32;
}
ieee80211_rx_irqsafe// SAFETY: caller must verify the safety contract for this operation
(hw, skb2);
ieee80211_rx_irqsafe(hw, skb2);
assert_eq!(ieee80211_rx_drain(hw), 1);
assert_eq!(RX_RECEIVED.load(Ordering::Acquire), 1);
local/recipes/drivers/linux-kpi/source/src/rust_impl/memory.rs
+8 -21
View File
@@ -86,7 +86,6 @@ fn dma32_alloc(size: usize) -> *mut u8 {
tracker.insert(SendU8Ptr(candidate), layout);
return candidate;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe { dealloc(candidate, layout) };
return ptr::null_mut();
}
@@ -95,15 +94,13 @@ fn dma32_alloc(size: usize) -> *mut u8 {
"dma32_alloc: virt_to_phys failed for {:#x}",
candidate as usize
);
// SAFETY: caller must verify the safety contract for this operation
unsafe { dealloc(candidate, layout) };
continue;
}
if phys as u64 >= DMA32_LIMIT {
log::debug!(
"dma32_alloc: attempt {} phys={:#x} >= 4GB, ret// SAFETY: caller must verify the safety contract for this operation
rying",
"dma32_alloc: attempt {} phys={:#x} >= 4GB, retrying",
attempt,
phys
);
@@ -116,7 +113,6 @@ rying",
size,
candidate as usize,
phys
// SAFETY: caller must verify the safety contract for this operation
);
if let Ok(mut tracker) = DMA32_TRACKER.lock() {
@@ -163,8 +159,7 @@ pub extern "C" fn kmalloc(size: usize, flags: u32) -> *mut u8 {
if ptr.is_null() {
return ptr::null_mut();
}
if let Ok(mut tracker) = ALLOC_TRACKER.lock// SAFETY: caller must verify the safety contract for this operation
() {
if let Ok(mut tracker) = ALLOC_TRACKER.lock() {
tracker.insert(SendU8Ptr(ptr), layout);
}
ptr
@@ -181,8 +176,7 @@ pub extern "C" fn kzalloc(size: usize, flags: u32) -> *mut u8 {
#[no_mangle]
pub extern "C" fn kfree(ptr: *const u8) {
if ptr.is_nu// SAFETY: caller must verify the safety contract for this operation
ll() {
if ptr.is_null() {
return;
}
@@ -194,7 +188,6 @@ ll() {
};
if let Some(layout) = dma32_tracker.remove(&SendU8Ptr(ptr as *mut u8)) {
unsafe { dealloc(ptr as *mut u8, layout) };
// SAFETY: caller must verify the safety contract for this operation
return;
}
}
@@ -246,12 +239,9 @@ pub extern "C" fn krealloc(ptr: *const u8, new_size: usize, flags: u32) -> *mut
}
};
let ol// SAFETY: caller must verify the safety contract for this operation
d_size = old_layout.map(|l| l.size()).unwrap_or(0);
let ne// SAFETY: caller must verify the safety contract for this operation
w_ptr = kmalloc(new_size, flags);
let old_size = old_layout.map(|l| l.size()).unwrap_or(0);
let new_ptr = kmalloc(new_size, flags);
if new_ptr.is_null() {
// SAFETY: caller must verify the safety contract for this operation
if let Some(layout) = old_layout {
if let Ok(mut tracker) = ALLOC_TRACKER.lock() {
tracker.insert(SendU8Ptr(mut_ptr), layout);
@@ -331,8 +321,7 @@ mod tests {
fn test_kmalloc_dma32_multiple() {
// Allocate and free multiple DMA32 buffers
let p1 = kmalloc(128, GFP_DMA32);
let p2 = kmalloc(25// SAFETY: caller must verify the safety contract for this operation
6, GFP_DMA32);
let p2 = kmalloc(256, GFP_DMA32);
assert!(!p1.is_null());
assert!(!p2.is_null());
kfree(p1);
@@ -347,8 +336,7 @@ mod tests {
}
#[test]
fn test_krealloc_zero_size_f// SAFETY: caller must verify the safety contract for this operation
rees_and_returns_null() {
fn test_krealloc_zero_size_frees_and_returns_null() {
let p = kmalloc(64, GFP_KERNEL);
assert!(!p.is_null());
assert!(krealloc(p, 0, GFP_KERNEL).is_null());
@@ -359,8 +347,7 @@ rees_and_returns_null() {
let p = kmalloc(8, GFP_KERNEL);
assert!(!p.is_null());
unsafe { ptr::write_bytes(p, 0xAB, 8) };
let q = krealloc(p, // SAFETY: caller must verify the safety contract for this operation
64, GFP_KERNEL);
let q = krealloc(p, 64, GFP_KERNEL);
assert!(!q.is_null());
for i in 0..8 {
assert_eq!(unsafe { *q.add(i) }, 0xAB);
local/recipes/drivers/linux-kpi/source/src/rust_impl/net.rs
+13 -35
View File
@@ -125,7 +125,6 @@ pub extern "C" fn kfree_skb(skb: *mut SkBuff) {
if skb.is_null() {
return;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe {
release_skb_buffer(skb);
drop(Box::from_raw(skb));
@@ -240,7 +239,6 @@ pub extern "C" fn skb_queue_head_init(list: *mut SkBuffHead) {
if list.is_null() {
return;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe {
(*list).next = ptr::null_mut();
@@ -251,8 +249,7 @@ pub extern "C" fn skb_queue_head_init(list: *mut SkBuffHead) {
}
#[no_mangle]
pub extern "C" fn skb_queue_tail(list: *mut SkBuffHead, newsk: *mut SkBuff// SAFETY: caller must verify the safety contract for this operation
) {
pub extern "C" fn skb_queue_tail(list: *mut SkBuffHead, newsk: *mut SkBuff) {
if list.is_null() || newsk.is_null() {
return;
}
@@ -274,8 +271,7 @@ pub extern "C" fn skb_queue_tail(list: *mut SkBuffHead, newsk: *mut SkBuff// SAF
}
#[no_mangle]
pub extern "C" fn skb_dequ// SAFETY: caller must verify the safety contract for this operation
eue(list: *mut SkBuffHead) -> *mut SkBuff {
pub extern "C" fn skb_dequeue(list: *mut SkBuffHead) -> *mut SkBuff {
if list.is_null() || unsafe { (*list).qlen } == 0 {
return ptr::null_mut();
}
@@ -310,14 +306,12 @@ pub extern "C" fn skb_queue_purge(list: *mut SkBuffHead) {
if skb.is_null() {
break;
}
// SAFETY: caller must verify the safety contract for this operation
kfree_skb(skb);
}
}
#[no_mangle]
pub extern "C" fn skb_peek(list: *const SkBuffHead) -// SAFETY: caller must verify the safety contract for this operation
> *mut SkBuff {
pub extern "C" fn skb_peek(list: *const SkBuffHead) -> *mut SkBuff {
if list.is_null() || unsafe { (*list).qlen } == 0 {
ptr::null_mut()
} else {
@@ -358,10 +352,8 @@ pub extern "C" fn skb_copy(src: *const SkBuff, gfp: u32) -> *mut SkBuff {
return ptr::null_mut();
}
let src_ref = unsafe { &*// SAFETY: caller must verify the safety contract for this operation
src };
let dst = alloc_s// SAFETY: caller must verify the safety contract for this operation
kb(src_ref.end, gfp);
let src_ref = unsafe { &*src };
let dst = alloc_skb(src_ref.end, gfp);
if dst.is_null() {
return ptr::null_mut();
}
@@ -398,11 +390,9 @@ pub extern "C" fn skb_clone(skb: *const SkBuff, _gfp: u32) -> *mut SkBuff {
unsafe { &*skb_ref.shared }
.refcount
// SAFETY: caller must verify the safety contract for this operation
.fetch_add(1, Ordering::AcqRel);
Box::into_raw(Box::new(SkBuff {
head: skb_ref.h// SAFETY: caller must verify the safety contract for this operation
ead,
head: skb_ref.head,
data: skb_ref.data,
len: skb_ref.len,
tail: skb_ref.tail,
@@ -466,7 +456,6 @@ pub extern "C" fn alloc_netdev_mqs(
if value == 0 {
break;
}
// SAFETY: caller must verify the safety contract for this operation
}
}
@@ -491,22 +480,18 @@ pub extern "C" fn alloc_netdev_mqs(
Box::into_raw(dev)
}
#[no// SAFETY: caller must verify the safety contract for this operation
_mangle]
#[no_mangle]
pub extern "C" fn free_netdev(dev: *mut NetDevice) {
if dev.is_null() {
return;
}
unsafe // SAFETY: caller must verify the safety contract for this operation
{
unsafe {
let dev_box = Box::from_raw(dev);
if !dev_box.priv_data.is_null() {
let layout = Layout::from_size_align(
// SAFETY: caller must verify the safety contract for this operation
dev_box.priv_alloc_size.max(1),
dev_box.priv_alloc_align.max(1),
)
// SAFETY: caller must verify the safety contract for this operation
.ok();
if let Some(layout) = layout {
dealloc(dev_box.priv_data.cast::<u8>(), layout);
@@ -527,8 +512,7 @@ pub extern "C" fn register_netdev(dev: *mut NetDevice) -> i32 {
0
}
#[no_// SAFETY: caller must verify the safety contract for this operation
mangle]
#[no_mangle]
pub extern "C" fn unregister_netdev(dev: *mut NetDevice) {
if dev.is_null() {
return;
@@ -559,7 +543,6 @@ pub extern "C" fn netif_carrier_ok(dev: *const NetDevice) -> i32 {
return 0;
}
if unsafe { &*dev }.carrier.load(Ordering::Acquire) != 0 {
// SAFETY: caller must verify the safety contract for this operation
1
} else {
0
@@ -601,7 +584,6 @@ pub extern "C" fn napi_schedule(napi: *mut NapiStruct) {
Ordering::Acquire,
)
.is_ok()
// SAFETY: caller must verify the safety contract for this operation
{
if let Some(poll) = napi_ref.poll {
let _ = poll(napi, napi_ref.weight);
@@ -609,8 +591,7 @@ pub extern "C" fn napi_schedule(napi: *mut NapiStruct) {
}
}
#// SAFETY: caller must verify the safety contract for this operation
[no_mangle]
#[no_mangle]
pub extern "C" fn napi_complete_done(napi: *mut NapiStruct, work_done: i32) -> i32 {
if napi.is_null() || work_done < 0 {
return 0;
@@ -673,8 +654,7 @@ mod tests {
static SETUP_CALLS: AtomicUsize = AtomicUsize::new(0);
static NAPI_POLLS: AtomicUsize = AtomicUsize::new(0);
extern "C" fn test_setup(_dev: *mut Net// SAFETY: caller must verify the safety contract for this operation
Device) {
extern "C" fn test_setup(_dev: *mut NetDevice) {
SETUP_CALLS.fetch_add(1, Ordering::AcqRel);
}
@@ -746,14 +726,12 @@ Device) {
assert_eq!(skb_queue_len(&queue), 1);
kfree_skb(skb);
skb_queue_purge(&mut queue);
assert_eq!(skb_queue_e// SAFETY: caller must verify the safety contract for this operation
mpty(&queue), 1);
assert_eq!(skb_queue_empty(&queue), 1);
kfree_skb(clone);
}
#[test]
fn net_device_carrier_track// SAFETY: caller must verify the safety contract for this operation
ing_works() {
fn net_device_carrier_tracking_works() {
let name = CString::new("wlan%d").expect("valid test CString");
let dev = alloc_netdev_mqs(
0usize,
local/recipes/drivers/linux-kpi/source/src/rust_impl/pci.rs
+8 -20
View File
@@ -282,7 +282,6 @@ fn replace_current_device(location: PciLocation, dev_ptr: *mut PciDev) {
ptr: dev_ptr as usize,
}) {
clear_irq_vectors_for_ptr(previous.ptr);
// SAFETY: caller must verify the safety contract for this operation
unsafe { drop(Box::from_raw(previous.ptr as *mut PciDev)) };
}
}
@@ -292,7 +291,6 @@ fn clear_current_device() {
if let Ok(mut state) = CURRENT_DEVICE.lock() {
if let Some(previous) = state.take() {
clear_irq_vectors_for_ptr(previous.ptr);
// SAFETY: caller must verify the safety contract for this operation
unsafe { drop(Box::from_raw(previous.ptr as *mut PciDev)) };
}
}
@@ -481,21 +479,17 @@ pub extern "C" fn pci_enable_device(dev: *mut PciDev) -> i32 {
if let Err(error) = pci.enable_device() {
log::warn!(
// SAFETY: caller must verify the safety contract for this operation
"pci_enable_device: failed to enable {:04x}:{:04x}: {}",
unsafe { (*dev).vendor },
unsafe { (*dev).device },
err// SAFETY: caller must verify the safety contract for this operation
or
// SAFETY: caller must verify the safety contract for this operation
error
);
return -EIO;
}
}
log::info!(
"pci_enable_device: vendor=0x{:04x} device=0x{:04x}"// SAFETY: caller must verify the safety contract for this operation
,
"pci_enable_device: vendor=0x{:04x} device=0x{:04x}",
unsafe { (*dev).vendor },
unsafe { (*dev).device }
);
@@ -505,8 +499,7 @@ or
#[no_mangle]
pub extern "C" fn pci_disable_device(dev: *mut PciDev) {
if dev.// SAFETY: caller must verify the safety contract for this operation
is_null() {
if dev.is_null() {
return;
}
log::info!("pci_disable_device");
@@ -531,8 +524,7 @@ pub extern "C" fn pci_iomap(dev: *mut PciDev, bar: u32, max_len: usize) -> *mut
}
#[no_mangle]
pub extern "C" fn pci_iounmap(_dev: *mut PciDev, addr: *mut u8, size: usi// SAFETY: caller must verify the safety contract for this operation
ze) {
pub extern "C" fn pci_iounmap(_dev: *mut PciDev, addr: *mut u8, size: usize) {
super::io::iounmap(addr, size);
}
@@ -720,8 +712,7 @@ fn pcie_cap_reg(dev: *mut PciDev, pos: u32, align: u32) -> Result<u32, i32> {
return Err(-EINVAL);
}
let cap = find_capability_offset(dev, PCI_CAP_ID_EXP)?;
Ok(cap +// SAFETY: caller must verify the safety contract for this operation
pos)
Ok(cap + pos)
}
#[no_mangle]
@@ -864,11 +855,9 @@ pub extern "C" fn pci_restore_state(dev: *mut PciDev) -> i32 {
}
}
// Restore the command register (low word of dword 1) without
// writing the status register // SAFETY: caller must verify the safety contract for this operation
(high word) — status bits are
// writing the status register (high word) — status bits are
// write-1-to-clear and must not be toggled by a restore.
match pci.read_config_dwo// SAFETY: caller must verify the safety contract for this operation
rd(0x04) {
match pci.read_config_dword(0x04) {
Ok(current) => {
let updated = (current & 0xFFFF_0000) | (buf[1] & 0xFFFF);
match pci.write_config_dword(0x04, updated) {
@@ -961,8 +950,7 @@ pub extern "C" fn pci_irq_vector(dev: *mut PciDev, vector_idx: i32) -> i32 {
let Some(allocated) = vectors.get(&(dev as usize)) else {
return -EINVAL;
};
alloc// SAFETY: caller must verify the safety contract for this operation
ated
allocated
.vectors
.get(vector_idx as usize)
.copied()
local/recipes/drivers/linux-kpi/source/src/rust_impl/sync.rs
+10 -28
View File
@@ -15,7 +15,6 @@ pub extern "C" fn mutex_init(m: *mut LinuxMutex) {
if m.is_null() {
return;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe {
(*m).state = AtomicU8::new(UNLOCKED);
}
@@ -56,13 +55,11 @@ pub extern "C" fn mutex_unlock(m: *mut LinuxMutex) {
if m.is_null() {
return;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe { &*m }.state.store(UNLOCKED, Ordering::Release);
}
#[no_mangle]
pub extern "C" fn mutex_is_locked(m: *mut Li// SAFETY: caller must verify the safety contract for this operation
nuxMutex) -> bool {
pub extern "C" fn mutex_is_locked(m: *mut LinuxMutex) -> bool {
if m.is_null() {
return false;
}
@@ -72,7 +69,6 @@ nuxMutex) -> bool {
#[repr(C)]
#[derive(Default)]
pub struct Spinlock {
// SAFETY: caller must verify the safety contract for this operation
locked: AtomicU8,
}
@@ -94,8 +90,7 @@ pub extern "C" fn spin_lock(lock: *mut Spinlock) {
while unsafe {
(*lock)
.locked
.compare_exchange(0, 1, Ordering::// SAFETY: caller must verify the safety contract for this operation
Acquire, Ordering::Relaxed)
.compare_exchange(0, 1, Ordering::Acquire, Ordering::Relaxed)
}
.is_err()
{
@@ -113,8 +108,7 @@ pub extern "C" fn spin_unlock(lock: *mut Spinlock) {
}
}
static IRQ_DEPTH: s// SAFETY: caller must verify the safety contract for this operation
td::sync::atomic::AtomicU32 = std::sync::atomic::AtomicU32::new(0);
static IRQ_DEPTH: std::sync::atomic::AtomicU32 = std::sync::atomic::AtomicU32::new(0);
#[no_mangle]
pub extern "C" fn spin_lock_irqsave(lock: *mut Spinlock, flags: *mut u64) -> u64 {
@@ -123,7 +117,6 @@ pub extern "C" fn spin_lock_irqsave(lock: *mut Spinlock, flags: *mut u64) -> u64
if !flags.is_null() {
unsafe { *flags = prev_depth as u64 };
}
// SAFETY: caller must verify the safety contract for this operation
prev_depth as u64
}
@@ -153,8 +146,7 @@ pub extern "C" fn local_irq_disable() {
#[no_mangle]
pub extern "C" fn local_irq_enable() {
let _ = IRQ_DEPTH.fetch_update(Ordering::AcqRel, Ordering::Relaxed// SAFETY: caller must verify the safety contract for this operation
, |depth| {
let _ = IRQ_DEPTH.fetch_update(Ordering::AcqRel, Ordering::Relaxed, |depth| {
Some(depth.saturating_sub(1))
});
}
@@ -167,7 +159,6 @@ pub extern "C" fn irqs_disabled() -> bool {
#[repr(C)]
pub struct Completion {
done: AtomicU8,
// SAFETY: caller must verify the safety contract for this operation
_padding: [u8; 63],
}
@@ -177,7 +168,6 @@ pub struct AtomicT {
}
#[no_mangle]
// SAFETY: caller must verify the safety contract for this operation
pub extern "C" fn init_completion(c: *mut Completion) {
if c.is_null() {
return;
@@ -220,28 +210,23 @@ pub extern "C" fn wait_for_completion(c: *mut Completion) {
}
#[no_mangle]
pub extern "C" fn wait_for_completion_timeout(c: *mut Completion// SAFETY: caller must verify the safety contract for this operation
, timeout_ms: u64) -> i32 {
pub extern "C" fn wait_for_completion_timeout(c: *mut Completion, timeout_ms: u64) -> i32 {
if c.is_null() {
return 0;
}
if unsafe { &*c }.don// SAFETY: caller must verify the safety contract for this operation
e.load(Ordering::Acquire) != 0 {
if unsafe { &*c }.done.load(Ordering::Acquire) != 0 {
return 1;
}
let deadline = Instant::now()
.ch// SAFETY: caller must verify the safety contract for this operation
ecked_add(Duration::from_millis(timeout_ms))
.checked_add(Duration::from_millis(timeout_ms))
.unwrap_or_else(Instant::now);
loop // SAFETY: caller must verify the safety contract for this operation
{
loop {
if unsafe { &*c }.done.load(Ordering::Acquire) != 0 {
return 1;
}
// SAFETY: caller must verify the safety contract for this operation
if Instant::now() >= deadline {
return 0;
}
@@ -278,22 +263,19 @@ pub extern "C" fn atomic_add(i: i32, v: *mut AtomicT) {
if v.is_null() {
return;
}
unsafe { &*v }.value.fetch_add// SAFETY: caller must verify the safety contract for this operation
(i, Ordering::SeqCst);
unsafe { &*v }.value.fetch_add(i, Ordering::SeqCst);
}
#[no_mangle]
pub extern "C" fn atomic_sub(i: i32, v: *mut AtomicT) {
if v.is_null() {
// SAFETY: caller must verify the safety contract for this operation
return;
}
unsafe { &*v }.value.fetch_sub(i, Ordering::SeqCst);
}
#[no_mangle]
pub extern "C" fn atomic_inc(// SAFETY: caller must verify the safety contract for this operation
v: *mut AtomicT) {
pub extern "C" fn atomic_inc(v: *mut AtomicT) {
atomic_add(1, v);
}
local/recipes/drivers/linux-kpi/source/src/rust_impl/timer.rs
-1
View File
@@ -125,7 +125,6 @@ pub extern "C" fn setup_timer(
}
let function_ptr = function as usize as *mut ();
// SAFETY: caller must verify the safety contract for this operation
unsafe {
ptr::write(
timer,
local/recipes/drivers/linux-kpi/source/src/rust_impl/wait.rs
-1
View File
@@ -138,7 +138,6 @@ pub extern "C" fn init_waitqueue_head(wq: *mut WaitQueueHead) {
if wq.is_null() {
return;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe {
ptr::write(
local/recipes/drivers/linux-kpi/source/src/rust_impl/wireless.rs
+11 -30
View File
@@ -177,7 +177,6 @@ pub extern "C" fn wiphy_free(wiphy: *mut Wiphy) {
if let Ok(mut bands_map) = WIPY_BANDS_MAP.lock() {
bands_map.remove(&wiphy_key);
}
// SAFETY: caller must verify the safety contract for this operation
unsafe {
let wiphy_box = Box::from_raw(wiphy);
if !wiphy_box.priv_data.is_null() {
@@ -199,14 +198,12 @@ pub extern "C" fn wiphy_register(wiphy: *mut Wiphy) -> i32 {
if unsafe { &*wiphy }.registered.load(Ordering::Acquire) != 0 {
return -16;
}
// SAFETY: caller must verify the safety contract for this operation
unsafe { &*wiphy }.registered.store(1, Ordering::Release);
0
}
#[no_mangle]
pub extern "C" fn wiphy_unregister// SAFETY: caller must verify the safety contract for this operation
(wiphy: *mut Wiphy) {
pub extern "C" fn wiphy_unregister(wiphy: *mut Wiphy) {
if wiphy.is_null() {
return;
}
@@ -218,7 +215,6 @@ pub extern "C" fn cfg80211_scan_done(
request: *mut Cfg80211ScanRequest,
info: *const Cfg80211ScanInfo,
) {
// SAFETY: caller must verify the safety contract for this operation
if request.is_null() {
return;
}
@@ -233,7 +229,6 @@ pub extern "C" fn cfg80211_scan_done(
(*wdev).scan_aborted = if info.is_null() {
false
} else {
// SAFETY: caller must verify the safety contract for this operation
(*info).aborted
};
}
@@ -241,8 +236,7 @@ pub extern "C" fn cfg80211_scan_done(
fn netdev_to_wireless_dev(dev: *mut c_void) -> *mut WirelessDev {
if dev.is_null() {
return ptr::null_mut()// SAFETY: caller must verify the safety contract for this operation
;
return ptr::null_mut();
}
let dev = dev.cast::<NetDevice>();
unsafe { (*dev).ieee80211_ptr.cast::<WirelessDev>() }
@@ -258,8 +252,7 @@ fn copy_bssid(dst: &mut WirelessDev, bssid: *const u8) {
unsafe {
ptr::copy_nonoverlapping(bssid, dst.last_bssid.as_mut_ptr(), dst.last_bssid.len());
}
dst.// SAFETY: caller must verify the safety contract for this operation
has_bssid = true;
dst.has_bssid = true;
}
#[no_mangle]
@@ -284,8 +277,7 @@ pub extern "C" fn cfg80211_connect_result(
wdev_ref.connected = status == 0;
wdev_ref.last_status = status;
wdev_ref.locally_generated = false;
copy_bssid(wdev_re// SAFETY: caller must verify the safety contract for this operation
f, bssid);
copy_bssid(wdev_ref, bssid);
}
if status == 0 {
@@ -335,7 +327,6 @@ pub extern "C" fn cfg80211_connect_bss(
dev,
bssid,
req_ie,
// SAFETY: caller must verify the safety contract for this operation
req_ie_len,
resp_ie,
resp_ie_len,
@@ -462,8 +453,7 @@ pub struct Cfg80211Bss {
pub channel: *mut Ieee80211Channel,
pub signal: i16,
pub capability: u16,
pub beacon_int// SAFETY: caller must verify the safety contract for this operation
erval: u16,
pub beacon_interval: u16,
pub ies: *const u8,
pub ies_len: usize,
wiphy: usize,
@@ -481,7 +471,6 @@ pub extern "C" fn cfg80211_inform_bss(
capability: u16,
beacon_interval: u16,
ies: *const u8,
// SAFETY: caller must verify the safety contract for this operation
ies_len: usize,
signal: i32,
_gfp: u32,
@@ -570,8 +559,7 @@ pub extern "C" fn cfg80211_put_bss(bss: *mut Cfg80211Bss) {
registry.retain(|entry| entry.as_ref() as *const Cfg80211Bss as usize != bss_addr);
let removed = before != registry.len();
if removed {
if let Ok(// SAFETY: caller must verify the safety contract for this operation
mut ies_map) = BSS_IES.lock() {
if let Ok(mut ies_map) = BSS_IES.lock() {
ies_map.remove(&bss_addr);
}
}
@@ -600,8 +588,7 @@ pub extern "C" fn cfg80211_get_bss(
return ptr::null_mut();
};
let want_bssid = if bssid.i// SAFETY: caller must verify the safety contract for this operation
s_null() {
let want_bssid = if bssid.is_null() {
None
} else {
let mut bytes = [0u8; 6];
@@ -640,8 +627,7 @@ s_null() {
break;
}
if tag_id == 0 && tag_len == ws.len() {
if &ies_// SAFETY: caller must verify the safety contract for this operation
slice[offset + 2..offset + 2 + tag_len] == ws.as_slice() {
if &ies_slice[offset + 2..offset + 2 + tag_len] == ws.as_slice() {
found = true;
break;
}
@@ -654,7 +640,6 @@ slice[offset + 2..offset + 2 + tag_len] == ws.as_slice() {
}
}
return entry.as_ref() as *const Cfg80211Bss as *mut Cfg80211Bss;
// SAFETY: caller must verify the safety contract for this operation
}
ptr::null_mut()
@@ -687,7 +672,6 @@ pub extern "C" fn cfg80211_new_sta(
pub extern "C" fn cfg80211_rx_mgmt(
wdev: *mut WirelessDev,
freq: u32,
// SAFETY: caller must verify the safety contract for this operation
sig_dbm: i32,
buf: *const u8,
len: usize,
@@ -807,8 +791,7 @@ mod tests {
let wiphy = wiphy_new_nm(ptr::null(), 0, ptr::null());
assert!(!wiphy.is_null());
assert_eq!(wiphy_register(wiphy), 0);
assert_eq!(wi// SAFETY: caller must verify the safety contract for this operation
phy_register(wiphy), -16);
assert_eq!(wiphy_register(wiphy), -16);
assert_eq!(unsafe { (*wiphy).registered.load(Ordering::Acquire) }, 1);
wiphy_unregister(wiphy);
assert_eq!(unsafe { (*wiphy).registered.load(Ordering::Acquire) }, 0);
@@ -896,8 +879,7 @@ phy_register(wiphy), -16);
assert_eq!(channel.band, NL80211_BAND_5GHZ);
assert_eq!(channel.center_freq, 5180);
assert// SAFETY: caller must verify the safety contract for this operation
_eq!(channel.hw_value, 36);
assert_eq!(channel.hw_value, 36);
assert_ne!(channel.flags & IEEE80211_CHAN_NO_IR, 0);
assert_ne!(channel.flags & IEEE80211_CHAN_RADAR, 0);
assert_ne!(channel.flags & IEEE80211_CHAN_NO_80MHZ, 0);
@@ -946,8 +928,7 @@ _eq!(channel.hw_value, 36);
assert_eq!(wdev_state.mgmt_rx_data, sta.to_vec());
assert_eq!(wdev_state.mgmt_tx_cookie, 99);
assert!(wdev_state.mgmt_tx_ack);
assert_eq!(wdev_s// SAFETY: caller must verify the safety contract for this operation
tate.mgmt_tx_data, sta.to_vec());
assert_eq!(wdev_state.mgmt_tx_data, sta.to_vec());
drop(events);
assert_eq!(ieee80211_channel_to_frequency(1, NL80211_BAND_2GHZ), 2412);
local/recipes/drivers/linux-kpi/source/src/rust_impl/workqueue.rs
-1
View File
@@ -124,7 +124,6 @@ pub extern "C" fn alloc_workqueue(
let name_str = if name.is_null() {
String::from("unknown")
} else {
// SAFETY: caller must verify the safety contract for this operation
unsafe {
let mut len = 0;
while *name.add(len) != 0 {