mirror of
https://github.com/cloud-hypervisor/cloud-hypervisor.git
synced 2024-08-23 00:11:16 +00:00
fuzz: Setup virt queue with proper addresses
To make the fuzzers more focused and more efficient, we now provide default addresses for the descriptor table, available ring, and used ring, which ensures the virt-queue has a valid memory layout (e.g. no overlapping between descriptor tables, available ring, and used ring). Signed-off-by: Bo Chen <chen.bo@intel.com>
This commit is contained in:
parent
1d3bb63ec8
commit
67a89f4538
@ -24,9 +24,18 @@ use vmm_sys_util::eventfd::{EventFd, EFD_NONBLOCK};
|
|||||||
|
|
||||||
type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;
|
type GuestMemoryMmap = vm_memory::GuestMemoryMmap<AtomicBitmap>;
|
||||||
|
|
||||||
const QUEUE_DATA_SIZE: usize = 28;
|
const QUEUE_DATA_SIZE: usize = 4;
|
||||||
const MEM_SIZE: usize = 256 * 1024 * 1024;
|
const MEM_SIZE: usize = 256 * 1024 * 1024;
|
||||||
const QUEUE_SIZE: u16 = 16; // Max entries in the queue.
|
// Max entries in the queue.
|
||||||
|
const QUEUE_SIZE: u16 = 256;
|
||||||
|
// Guest physical address for descriptor table.
|
||||||
|
const DESC_TABLE_ADDR: u64 = 0;
|
||||||
|
const DESC_TABLE_SIZE: u64 = 16_u64 * QUEUE_SIZE as u64;
|
||||||
|
// Guest physical address for available ring
|
||||||
|
const AVAIL_RING_ADDR: u64 = DESC_TABLE_ADDR + DESC_TABLE_SIZE;
|
||||||
|
const AVAIL_RING_SIZE: u64 = 6_u64 + 2 * QUEUE_SIZE as u64;
|
||||||
|
// Guest physical address for used ring (requires to 4-bytes aligned)
|
||||||
|
const USED_RING_ADDR: u64 = (AVAIL_RING_ADDR + AVAIL_RING_SIZE + 3) & !3_u64;
|
||||||
|
|
||||||
fuzz_target!(|bytes| {
|
fuzz_target!(|bytes| {
|
||||||
if bytes.len() < QUEUE_DATA_SIZE || bytes.len() > (QUEUE_DATA_SIZE + MEM_SIZE) {
|
if bytes.len() < QUEUE_DATA_SIZE || bytes.len() > (QUEUE_DATA_SIZE + MEM_SIZE) {
|
||||||
@ -106,18 +115,13 @@ fn setup_virt_queue(bytes: &[u8; QUEUE_DATA_SIZE]) -> Queue {
|
|||||||
q.set_next_used(bytes[1] as u16);
|
q.set_next_used(bytes[1] as u16);
|
||||||
q.set_event_idx(bytes[2] % 2 != 0);
|
q.set_event_idx(bytes[2] % 2 != 0);
|
||||||
q.set_size(bytes[3] as u16 % QUEUE_SIZE);
|
q.set_size(bytes[3] as u16 % QUEUE_SIZE);
|
||||||
q.set_desc_table_address(
|
|
||||||
Some(u32::from_le_bytes(bytes[4..8].try_into().unwrap())),
|
q.try_set_desc_table_address(GuestAddress(DESC_TABLE_ADDR))
|
||||||
Some(u32::from_le_bytes(bytes[8..12].try_into().unwrap())),
|
.unwrap();
|
||||||
);
|
q.try_set_avail_ring_address(GuestAddress(AVAIL_RING_ADDR))
|
||||||
q.set_avail_ring_address(
|
.unwrap();
|
||||||
Some(u32::from_le_bytes(bytes[12..16].try_into().unwrap())),
|
q.try_set_used_ring_address(GuestAddress(USED_RING_ADDR))
|
||||||
Some(u32::from_le_bytes(bytes[16..20].try_into().unwrap())),
|
.unwrap();
|
||||||
);
|
|
||||||
q.set_used_ring_address(
|
|
||||||
Some(u32::from_le_bytes(bytes[20..24].try_into().unwrap())),
|
|
||||||
Some(u32::from_le_bytes(bytes[24..28].try_into().unwrap())),
|
|
||||||
);
|
|
||||||
q.set_ready(true);
|
q.set_ready(true);
|
||||||
|
|
||||||
q
|
q
|
||||||
|
Loading…
Reference in New Issue
Block a user