mirror of
https://chromium.googlesource.com/crosvm/crosvm
synced 2025-02-09 03:57:24 +00:00
1dab58a2cf
This search/replace updates all copyright notices to drop the "All rights reserved", Use "ChromiumOS" instead of "Chromium OS" and drops the trailing dots. This fulfills the request from legal and unifies our notices. ./tools/health-check has been updated to only accept this style. BUG=b:246579983 TEST=./tools/health-check Change-Id: I87a80701dc651f1baf4820e5cc42469d7c5f5bf7 Reviewed-on: https://chromium-review.googlesource.com/c/crosvm/crosvm/+/3894243 Reviewed-by: Daniel Verkamp <dverkamp@chromium.org> Commit-Queue: Dennis Kempin <denniskempin@google.com>
111 lines
3 KiB
Rust
111 lines
3 KiB
Rust
// Copyright 2018 The ChromiumOS Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#![no_main]
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use std::io::Cursor;
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use std::io::Read;
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use std::io::Seek;
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use std::io::SeekFrom;
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use std::mem::size_of;
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use base::Event;
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use cros_fuzz::fuzz_target;
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use devices::virtio::base_features;
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use devices::virtio::BlockAsync;
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use devices::virtio::Interrupt;
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use devices::virtio::Queue;
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use devices::virtio::VirtioDevice;
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use devices::IrqLevelEvent;
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use hypervisor::ProtectionType;
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use vm_memory::GuestAddress;
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use vm_memory::GuestMemory;
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const MEM_SIZE: u64 = 256 * 1024 * 1024;
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const DESC_SIZE: u64 = 16; // Bytes in one virtio descriptor.
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const QUEUE_SIZE: u16 = 16; // Max entries in the queue.
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const CMD_SIZE: usize = 16; // Bytes in the command.
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fuzz_target!(|bytes| {
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let size_u64 = size_of::<u64>();
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let mem = GuestMemory::new(&[(GuestAddress(0), MEM_SIZE)]).unwrap();
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// The fuzz data is interpreted as:
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// starting index 8 bytes
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// command location 8 bytes
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// command 16 bytes
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// descriptors circular buffer 16 bytes * 3
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if bytes.len() < 4 * size_u64 {
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// Need an index to start.
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return;
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}
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let mut data_image = Cursor::new(bytes);
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let first_index = read_u64(&mut data_image);
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if first_index > MEM_SIZE / DESC_SIZE {
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return;
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}
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let first_offset = first_index * DESC_SIZE;
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if first_offset as usize + size_u64 > bytes.len() {
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return;
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}
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let command_addr = read_u64(&mut data_image);
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if command_addr > MEM_SIZE - CMD_SIZE as u64 {
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return;
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}
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if mem
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.write_all_at_addr(
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&bytes[2 * size_u64..(2 * size_u64) + CMD_SIZE],
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GuestAddress(command_addr as u64),
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)
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.is_err()
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{
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return;
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}
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data_image.seek(SeekFrom::Start(first_offset)).unwrap();
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let desc_table = read_u64(&mut data_image);
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if mem
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.write_all_at_addr(&bytes[32..], GuestAddress(desc_table as u64))
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.is_err()
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{
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return;
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}
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let mut q = Queue::new(QUEUE_SIZE);
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q.set_ready(true);
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q.set_size(QUEUE_SIZE / 2);
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q.max_size = QUEUE_SIZE;
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let queue_evts: Vec<Event> = vec![Event::new().unwrap()];
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let queue_evt = queue_evts[0].try_clone().unwrap();
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let features = base_features(ProtectionType::Unprotected);
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let disk_file = tempfile::tempfile().unwrap();
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let mut block =
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BlockAsync::new(features, Box::new(disk_file), false, true, 512, None, None).unwrap();
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block.activate(
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mem,
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Interrupt::new(
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IrqLevelEvent::new().unwrap(),
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None, // msix_config
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0xFFFF, // VIRTIO_MSI_NO_VECTOR
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),
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vec![q],
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queue_evts,
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);
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queue_evt.write(77).unwrap(); // Rings the doorbell, any byte will do.
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});
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fn read_u64<T: Read>(readable: &mut T) -> u64 {
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let mut buf = [0u8; size_of::<u64>()];
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readable.read_exact(&mut buf[..]).unwrap();
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u64::from_le_bytes(buf)
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}
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