Merge branch 'fuzzer--fuse' into 'master'
Add redoxfs fuzzer for FUSE interface See merge request redox-os/redoxfs!74
This commit is contained in:
Jeremy Soller
@@ -69,3 +69,6 @@ std = [
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||||
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|
||||
"base64ct",
|
||||
"endian-num",
|
||||
"env_logger",
|
||||
"fuser",
|
||||
"getrandom",
|
||||
"libc",
|
||||
"libredox 0.1.3",
|
||||
"log",
|
||||
"range-tree",
|
||||
"redox-path",
|
||||
"redox_syscall 0.5.2",
|
||||
"seahash",
|
||||
"termion",
|
||||
"time",
|
||||
"uuid",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
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||||
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||||
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|
||||
"anyhow",
|
||||
"arbitrary",
|
||||
"fuser",
|
||||
"libfuzzer-sys",
|
||||
"nix",
|
||||
"redoxfs",
|
||||
"tempfile",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
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||||
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||||
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|
||||
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|
||||
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|
||||
"regex-syntax",
|
||||
]
|
||||
|
||||
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||||
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||||
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||||
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||||
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||||
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|
||||
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||||
|
||||
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||||
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||||
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||||
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|
||||
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||||
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|
||||
"bitflags 2.5.0",
|
||||
"errno",
|
||||
"libc",
|
||||
"linux-raw-sys",
|
||||
"windows-sys",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "seahash"
|
||||
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||||
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||||
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||||
|
||||
[[package]]
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||||
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||||
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||||
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||||
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||||
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||||
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||||
]
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||||
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"rustix",
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"windows-sys",
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]
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"redox_termios",
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||||
]
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|
||||
[[package]]
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||||
"winapi",
|
||||
]
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||||
|
||||
[[package]]
|
||||
name = "typenum"
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|
||||
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|
||||
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|
||||
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|
||||
"log",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "uuid"
|
||||
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||||
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|
||||
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|
||||
]
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||||
|
||||
[[package]]
|
||||
name = "version_check"
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||||
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||||
|
||||
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"winapi-x86_64-pc-windows-gnu",
|
||||
]
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||||
|
||||
[[package]]
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name = "winapi-i686-pc-windows-gnu"
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||||
name = "winapi-x86_64-pc-windows-gnu"
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[[package]]
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||||
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||||
]
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||||
|
||||
[[package]]
|
||||
name = "windows-targets"
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||||
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source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
dependencies = [
|
||||
"windows_aarch64_gnullvm",
|
||||
"windows_aarch64_msvc",
|
||||
"windows_i686_gnu",
|
||||
"windows_i686_gnullvm",
|
||||
"windows_i686_msvc",
|
||||
"windows_x86_64_gnu",
|
||||
"windows_x86_64_gnullvm",
|
||||
"windows_x86_64_msvc",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_gnullvm"
|
||||
version = "0.52.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
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|
||||
|
||||
[[package]]
|
||||
name = "windows_aarch64_msvc"
|
||||
version = "0.52.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "9985fd1504e250c615ca5f281c3f7a6da76213ebd5ccc9561496568a2752afb6"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnu"
|
||||
version = "0.52.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "88ba073cf16d5372720ec942a8ccbf61626074c6d4dd2e745299726ce8b89670"
|
||||
|
||||
[[package]]
|
||||
name = "windows_i686_gnullvm"
|
||||
version = "0.52.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "87f4261229030a858f36b459e748ae97545d6f1ec60e5e0d6a3d32e0dc232ee9"
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||||
|
||||
[[package]]
|
||||
name = "windows_i686_msvc"
|
||||
version = "0.52.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "db3c2bf3d13d5b658be73463284eaf12830ac9a26a90c717b7f771dfe97487bf"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnu"
|
||||
version = "0.52.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
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||||
checksum = "4e4246f76bdeff09eb48875a0fd3e2af6aada79d409d33011886d3e1581517d9"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_gnullvm"
|
||||
version = "0.52.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "852298e482cd67c356ddd9570386e2862b5673c85bd5f88df9ab6802b334c596"
|
||||
|
||||
[[package]]
|
||||
name = "windows_x86_64_msvc"
|
||||
version = "0.52.5"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "bec47e5bfd1bff0eeaf6d8b485cc1074891a197ab4225d504cb7a1ab88b02bf0"
|
||||
|
||||
[[package]]
|
||||
name = "zerocopy"
|
||||
version = "0.6.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "854e949ac82d619ee9a14c66a1b674ac730422372ccb759ce0c39cabcf2bf8e6"
|
||||
dependencies = [
|
||||
"byteorder",
|
||||
"zerocopy-derive",
|
||||
]
|
||||
|
||||
[[package]]
|
||||
name = "zerocopy-derive"
|
||||
version = "0.6.6"
|
||||
source = "registry+https://github.com/rust-lang/crates.io-index"
|
||||
checksum = "125139de3f6b9d625c39e2efdd73d41bdac468ccd556556440e322be0e1bbd91"
|
||||
dependencies = [
|
||||
"proc-macro2",
|
||||
"quote",
|
||||
"syn",
|
||||
]
|
||||
@@ -0,0 +1,30 @@
|
||||
[package]
|
||||
name = "redoxfs-fuzz"
|
||||
version = "0.0.0"
|
||||
publish = false
|
||||
edition = "2021"
|
||||
|
||||
[features]
|
||||
default = []
|
||||
log = []
|
||||
|
||||
[package.metadata]
|
||||
cargo-fuzz = true
|
||||
|
||||
[dependencies]
|
||||
anyhow = "1.0.86"
|
||||
arbitrary = { version = "1.3.2", features = ["derive"] }
|
||||
fuser = { version = "0.12.0" }
|
||||
libfuzzer-sys = "0.4"
|
||||
nix = { version = "0.29.0", features = ["fs"] }
|
||||
tempfile = "3.10.1"
|
||||
|
||||
[dependencies.redoxfs]
|
||||
path = ".."
|
||||
|
||||
[[bin]]
|
||||
name = "fuse_fuzz_target"
|
||||
path = "fuzz_targets/fuse_fuzz_target.rs"
|
||||
test = false
|
||||
doc = false
|
||||
bench = false
|
||||
@@ -0,0 +1,338 @@
|
||||
//! Fuzzer that exercises random file system operations against a FUSE-mounted redoxfs.
|
||||
|
||||
#![no_main]
|
||||
|
||||
use anyhow::{ensure, Result};
|
||||
use fuser;
|
||||
use libfuzzer_sys::{arbitrary::Arbitrary, fuzz_target, Corpus};
|
||||
use nix::sys::statvfs::statvfs;
|
||||
use std::{
|
||||
fs::{self, File, FileTimes, OpenOptions},
|
||||
io::{Read, Seek, SeekFrom, Write},
|
||||
os::unix::fs::{self as unix_fs, PermissionsExt},
|
||||
path::{Path, PathBuf},
|
||||
thread,
|
||||
time::{Duration, SystemTime, UNIX_EPOCH},
|
||||
};
|
||||
use tempfile;
|
||||
|
||||
use redoxfs::{mount::fuse::Fuse, DiskSparse, FileSystem};
|
||||
|
||||
/// Maximum size for files and buffers. Chosen arbitrarily with fuzzing performance in mind.
|
||||
const MAX_SIZE: u64 = 10_000_000;
|
||||
/// Limit on the number of remounts in a single test case. Chosen arbitrarily with fuzzing
|
||||
/// performance in mind: remounts are costly.
|
||||
const MAX_MOUNT_SEQUENCES: usize = 3;
|
||||
|
||||
/// An operation to be performed by the fuzzer.
|
||||
#[derive(Arbitrary, Clone, Debug)]
|
||||
enum Operation {
|
||||
Chown {
|
||||
path: PathBuf,
|
||||
uid: Option<u32>,
|
||||
gid: Option<u32>,
|
||||
},
|
||||
CreateDir {
|
||||
path: PathBuf,
|
||||
},
|
||||
HardLink {
|
||||
original: PathBuf,
|
||||
link: PathBuf,
|
||||
},
|
||||
Metadata {
|
||||
path: PathBuf,
|
||||
},
|
||||
Read {
|
||||
path: PathBuf,
|
||||
},
|
||||
ReadDir {
|
||||
path: PathBuf,
|
||||
},
|
||||
ReadLink {
|
||||
path: PathBuf,
|
||||
},
|
||||
RemoveDir {
|
||||
path: PathBuf,
|
||||
},
|
||||
RemoveFile {
|
||||
path: PathBuf,
|
||||
},
|
||||
Rename {
|
||||
from: PathBuf,
|
||||
to: PathBuf,
|
||||
},
|
||||
SeekRead {
|
||||
path: PathBuf,
|
||||
seek_pos: u64,
|
||||
buf_size: usize,
|
||||
},
|
||||
SeekWrite {
|
||||
path: PathBuf,
|
||||
seek_pos: u64,
|
||||
buf_size: usize,
|
||||
},
|
||||
SetLen {
|
||||
path: PathBuf,
|
||||
size: u64,
|
||||
},
|
||||
SetPermissions {
|
||||
path: PathBuf,
|
||||
readonly: Option<bool>,
|
||||
mode: Option<u32>,
|
||||
},
|
||||
SetTimes {
|
||||
path: PathBuf,
|
||||
accessed_since_epoch: Option<Duration>,
|
||||
modified_since_epoch: Option<Duration>,
|
||||
},
|
||||
Statvfs {},
|
||||
SymLink {
|
||||
original: PathBuf,
|
||||
link: PathBuf,
|
||||
},
|
||||
Write {
|
||||
path: PathBuf,
|
||||
buf_size: usize,
|
||||
},
|
||||
}
|
||||
|
||||
/// Parameters for mounting the file system and operations to be performed afterwards.
|
||||
#[derive(Arbitrary, Clone, Debug)]
|
||||
struct MountSequence {
|
||||
squash: bool,
|
||||
operations: Vec<Operation>,
|
||||
}
|
||||
|
||||
/// The whole input to a single fuzzer invocation.
|
||||
#[derive(Arbitrary, Clone, Debug)]
|
||||
struct TestCase {
|
||||
disk_size: u64,
|
||||
reserved_size: u64,
|
||||
mount_sequences: Vec<MountSequence>,
|
||||
}
|
||||
|
||||
/// Creates the disk for backing the Redoxfs.
|
||||
fn create_disk(temp_path: &Path, disk_size: u64) -> DiskSparse {
|
||||
let disk_path = temp_path.join("disk.img");
|
||||
DiskSparse::create(disk_path, disk_size).unwrap()
|
||||
}
|
||||
|
||||
/// Creates an empty Redoxfs.
|
||||
fn create_redoxfs(disk: DiskSparse, reserved_size: u64) -> bool {
|
||||
let password = None;
|
||||
let reserved = vec![0; reserved_size as usize];
|
||||
let ctime = SystemTime::now().duration_since(UNIX_EPOCH).unwrap();
|
||||
FileSystem::create_reserved(
|
||||
disk,
|
||||
password,
|
||||
&reserved,
|
||||
ctime.as_secs(),
|
||||
ctime.subsec_nanos(),
|
||||
)
|
||||
.is_ok()
|
||||
}
|
||||
|
||||
/// Mounts an existing Redoxfs, runs the callback and performs the unmount.
|
||||
fn with_redoxfs_mount<F>(temp_path: &Path, disk: DiskSparse, squash: bool, callback: F)
|
||||
where
|
||||
F: FnOnce(&Path) + Send + 'static,
|
||||
{
|
||||
let password = None;
|
||||
let block = None;
|
||||
let mut fs = FileSystem::open(disk, password, block, squash).unwrap();
|
||||
|
||||
let mount_path = temp_path.join("mount");
|
||||
fs::create_dir_all(&mount_path).unwrap();
|
||||
let mut session = fuser::Session::new(Fuse { fs: &mut fs }, &mount_path, &[]).unwrap();
|
||||
let mut unmounter = session.unmount_callable();
|
||||
|
||||
let join_handle = thread::spawn(move || {
|
||||
callback(&mount_path);
|
||||
unmounter.unmount().unwrap();
|
||||
});
|
||||
|
||||
session.run().unwrap();
|
||||
join_handle.join().unwrap();
|
||||
}
|
||||
|
||||
fn get_path_within_fs(fs_path: &Path, path_to_add: &Path) -> Result<PathBuf> {
|
||||
ensure!(path_to_add.is_relative());
|
||||
ensure!(path_to_add
|
||||
.components()
|
||||
.all(|c| c != std::path::Component::ParentDir));
|
||||
Ok(fs_path.join(path_to_add))
|
||||
}
|
||||
|
||||
fn do_operation(fs_path: &Path, op: &Operation) -> Result<()> {
|
||||
match op {
|
||||
Operation::Chown { path, uid, gid } => {
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
unix_fs::chown(path, *uid, *gid)?;
|
||||
}
|
||||
Operation::CreateDir { path } => {
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
fs::create_dir(path)?;
|
||||
}
|
||||
Operation::HardLink { original, link } => {
|
||||
let original = get_path_within_fs(fs_path, original)?;
|
||||
let link = get_path_within_fs(fs_path, link)?;
|
||||
fs::hard_link(original, link)?;
|
||||
}
|
||||
Operation::Metadata { path } => {
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
fs::metadata(path)?;
|
||||
}
|
||||
Operation::Read { path } => {
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
fs::read(path)?;
|
||||
}
|
||||
Operation::ReadDir { path } => {
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
let _ = fs::read_dir(path)?.count();
|
||||
}
|
||||
Operation::ReadLink { path } => {
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
fs::read_link(path)?;
|
||||
}
|
||||
Operation::RemoveDir { path } => {
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
fs::remove_dir(path)?;
|
||||
}
|
||||
Operation::RemoveFile { path } => {
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
fs::remove_file(path)?;
|
||||
}
|
||||
Operation::Rename { from, to } => {
|
||||
let from = get_path_within_fs(fs_path, from)?;
|
||||
let to = get_path_within_fs(fs_path, to)?;
|
||||
fs::rename(from, to)?;
|
||||
}
|
||||
Operation::SeekRead {
|
||||
path,
|
||||
seek_pos,
|
||||
buf_size,
|
||||
} => {
|
||||
ensure!(*buf_size as u64 <= MAX_SIZE);
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
let mut file = File::open(path)?;
|
||||
file.seek(SeekFrom::Start(*seek_pos))?;
|
||||
let mut buf = vec![0; *buf_size];
|
||||
file.read(&mut buf)?;
|
||||
}
|
||||
Operation::SeekWrite {
|
||||
path,
|
||||
seek_pos,
|
||||
buf_size,
|
||||
} => {
|
||||
ensure!(*seek_pos <= MAX_SIZE);
|
||||
ensure!(*buf_size as u64 <= MAX_SIZE);
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
let mut file = OpenOptions::new().write(true).open(path)?;
|
||||
file.seek(SeekFrom::Start(*seek_pos))?;
|
||||
let buf = vec![0; *buf_size];
|
||||
file.write(&buf)?;
|
||||
}
|
||||
Operation::SetLen { path, size } => {
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
let file = OpenOptions::new().write(true).open(path)?;
|
||||
file.set_len(*size)?;
|
||||
}
|
||||
Operation::SetPermissions {
|
||||
path,
|
||||
readonly,
|
||||
mode,
|
||||
} => {
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
let metadata = fs::metadata(&path)?;
|
||||
let mut perms = metadata.permissions();
|
||||
if let Some(readonly) = readonly {
|
||||
perms.set_readonly(*readonly);
|
||||
}
|
||||
if let Some(mode) = mode {
|
||||
perms.set_mode(*mode);
|
||||
}
|
||||
fs::set_permissions(path, perms)?;
|
||||
}
|
||||
Operation::SetTimes {
|
||||
path,
|
||||
accessed_since_epoch,
|
||||
modified_since_epoch,
|
||||
} => {
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
let file = File::options().write(true).open(path)?;
|
||||
let mut times = FileTimes::new();
|
||||
if let Some(accessed_since_epoch) = accessed_since_epoch {
|
||||
if let Some(accessed) = UNIX_EPOCH.checked_add(*accessed_since_epoch) {
|
||||
times = times.set_accessed(accessed);
|
||||
}
|
||||
}
|
||||
if let Some(modified_since_epoch) = modified_since_epoch {
|
||||
if let Some(modified) = UNIX_EPOCH.checked_add(*modified_since_epoch) {
|
||||
times = times.set_modified(modified);
|
||||
}
|
||||
}
|
||||
file.set_times(times)?;
|
||||
}
|
||||
Operation::Statvfs {} => {
|
||||
statvfs(fs_path)?;
|
||||
}
|
||||
Operation::SymLink { original, link } => {
|
||||
let original = get_path_within_fs(fs_path, original)?;
|
||||
let link = get_path_within_fs(fs_path, link)?;
|
||||
unix_fs::symlink(original, link)?;
|
||||
}
|
||||
Operation::Write { path, buf_size } => {
|
||||
ensure!(*buf_size as u64 <= MAX_SIZE);
|
||||
let path = get_path_within_fs(fs_path, path)?;
|
||||
let buf = vec![0; *buf_size];
|
||||
fs::write(path, &buf)?;
|
||||
}
|
||||
}
|
||||
Ok(())
|
||||
}
|
||||
|
||||
fuzz_target!(|test_case: TestCase| -> Corpus {
|
||||
if test_case.disk_size > MAX_SIZE
|
||||
|| test_case.reserved_size > MAX_SIZE
|
||||
|| test_case.mount_sequences.len() > MAX_MOUNT_SEQUENCES
|
||||
{
|
||||
return Corpus::Reject;
|
||||
}
|
||||
|
||||
let temp_dir = tempfile::Builder::new()
|
||||
.prefix("fuse_fuzz_target")
|
||||
.tempdir()
|
||||
.unwrap();
|
||||
|
||||
#[cfg(feature = "log")]
|
||||
eprintln!("create fs");
|
||||
let disk = create_disk(temp_dir.path(), test_case.disk_size);
|
||||
if !create_redoxfs(disk, test_case.reserved_size) {
|
||||
// File system creation failed (e.g., due to insufficient space) so we bail out, still
|
||||
// exercising this code path is useful.
|
||||
return Corpus::Keep;
|
||||
}
|
||||
|
||||
for mount_seq in test_case.mount_sequences.iter() {
|
||||
#[cfg(feature = "log")]
|
||||
eprintln!("mount fs");
|
||||
|
||||
let disk = create_disk(temp_dir.path(), test_case.disk_size);
|
||||
let operations = mount_seq.operations.clone();
|
||||
with_redoxfs_mount(temp_dir.path(), disk, mount_seq.squash, move |fs_path| {
|
||||
for operation in operations.iter() {
|
||||
#[cfg(feature = "log")]
|
||||
eprintln!("do operation {operation:?}");
|
||||
|
||||
let _result = do_operation(fs_path, operation);
|
||||
|
||||
#[cfg(feature = "log")]
|
||||
eprintln!("operation result {:?}", _result.err());
|
||||
}
|
||||
});
|
||||
|
||||
#[cfg(feature = "log")]
|
||||
eprintln!("unmounted fs");
|
||||
}
|
||||
Corpus::Keep
|
||||
});
|
||||
+3
-1
@@ -48,8 +48,10 @@ mod disk;
|
||||
mod filesystem;
|
||||
mod header;
|
||||
mod key;
|
||||
#[cfg(feature = "std")]
|
||||
#[cfg(all(feature = "std", not(fuzzing)))]
|
||||
mod mount;
|
||||
#[cfg(all(feature = "std", fuzzing))]
|
||||
pub mod mount;
|
||||
mod node;
|
||||
mod record;
|
||||
mod transaction;
|
||||
|
||||
+2
-2
@@ -27,12 +27,12 @@ const NULL_TIME: Duration = Duration::new(0, 0);
|
||||
pub fn mount<D, P, T, F>(
|
||||
mut filesystem: filesystem::FileSystem<D>,
|
||||
mountpoint: P,
|
||||
mut callback: F,
|
||||
callback: F,
|
||||
) -> io::Result<T>
|
||||
where
|
||||
D: Disk,
|
||||
P: AsRef<Path>,
|
||||
F: FnMut(&Path) -> T,
|
||||
F: FnOnce(&Path) -> T,
|
||||
{
|
||||
let mountpoint = mountpoint.as_ref();
|
||||
|
||||
|
||||
+3
-1
@@ -1,5 +1,7 @@
|
||||
#[cfg(not(target_os = "redox"))]
|
||||
#[cfg(all(not(target_os = "redox"), not(fuzzing)))]
|
||||
mod fuse;
|
||||
#[cfg(all(not(target_os = "redox"), fuzzing))]
|
||||
pub mod fuse;
|
||||
|
||||
#[cfg(not(target_os = "redox"))]
|
||||
pub use self::fuse::mount;
|
||||
|
||||
Reference in New Issue
Block a user