46 lines
1.2 KiB
Rust
46 lines
1.2 KiB
Rust
#![no_main]
|
|
|
|
use libfuzzer_sys::fuzz_target;
|
|
use esp_p4_eth::{
|
|
zeroed_rx_descriptors, OwnedBy, RDesRing, BUF_SIZE, MIN_RX_FRAME_SIZE, RX_DESC_COUNT,
|
|
};
|
|
|
|
fuzz_target!(|data: &[u8]| {
|
|
let mut descriptors = zeroed_rx_descriptors();
|
|
let mut buffers = [[0u8; BUF_SIZE]; RX_DESC_COUNT];
|
|
let mut ring = RDesRing::new(&mut descriptors, &mut buffers);
|
|
|
|
if data.len() < 6 {
|
|
let _ = ring.receive();
|
|
return;
|
|
}
|
|
|
|
let owner = if data[0] & 1 == 0 {
|
|
OwnedBy::Cpu
|
|
} else {
|
|
OwnedBy::Dma
|
|
};
|
|
let mut status = (((u16::from(data[1]) << 8) | u16::from(data[2])) as u32) << 16;
|
|
if data[0] & 0b0000_0010 != 0 {
|
|
status |= 1 << 15;
|
|
}
|
|
if data[0] & 0b0000_0100 != 0 {
|
|
status |= 1 << 9;
|
|
}
|
|
if data[0] & 0b0000_1000 != 0 {
|
|
status |= 1 << 8;
|
|
}
|
|
|
|
let payload_len = usize::from(data[3]) % (BUF_SIZE + MIN_RX_FRAME_SIZE);
|
|
let payload_end = 4 + payload_len.min(data.len().saturating_sub(4));
|
|
ring.fuzz_seed_current(status, owner, &data[4..payload_end]);
|
|
|
|
if let Some((len, frame)) = ring.receive() {
|
|
assert_eq!(len, frame.len());
|
|
assert!(len <= BUF_SIZE);
|
|
ring.pop();
|
|
}
|
|
|
|
assert!(ring.fuzz_current_index() < RX_DESC_COUNT);
|
|
});
|