mirror of
https://github.com/cloud-hypervisor/cloud-hypervisor.git
synced 2024-09-12 18:15:06 +00:00
This is required when booting with hypervisor-fw. Signed-off-by: Rob Bradford <robert.bradford@intel.com>
514 lines
19 KiB
Rust
514 lines
19 KiB
Rust
// Copyright 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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//
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// Copyright © 2020 Intel Corporation
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//
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// SPDX-License-Identifier: Apache-2.0
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use seccomp::{
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allow_syscall, allow_syscall_if, BpfProgram, Error, SeccompAction, SeccompCmpArgLen as ArgLen,
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SeccompCmpOp::Eq, SeccompCondition as Cond, SeccompError, SeccompFilter, SeccompRule,
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SyscallRuleSet,
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};
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use std::convert::TryInto;
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pub enum Thread {
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VirtioBalloon,
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VirtioBlk,
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VirtioBlkIoUring,
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VirtioConsole,
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VirtioIommu,
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VirtioMem,
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VirtioNet,
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VirtioNetCtl,
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VirtioPmem,
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VirtioRng,
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VirtioVhostBlk,
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VirtioVhostFs,
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VirtioVhostNet,
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VirtioVhostNetCtl,
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VirtioVsock,
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VirtioWatchdog,
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}
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/// Shorthand for chaining `SeccompCondition`s with the `and` operator in a `SeccompRule`.
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/// The rule will take the `Allow` action if _all_ the conditions are true.
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///
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/// [`Allow`]: enum.SeccompAction.html
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/// [`SeccompCondition`]: struct.SeccompCondition.html
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/// [`SeccompRule`]: struct.SeccompRule.html
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macro_rules! and {
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($($x:expr,)*) => (SeccompRule::new(vec![$($x),*], SeccompAction::Allow));
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($($x:expr),*) => (SeccompRule::new(vec![$($x),*], SeccompAction::Allow))
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}
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/// Shorthand for chaining `SeccompRule`s with the `or` operator in a `SeccompFilter`.
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///
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/// [`SeccompFilter`]: struct.SeccompFilter.html
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/// [`SeccompRule`]: struct.SeccompRule.html
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macro_rules! or {
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($($x:expr,)*) => (vec![$($x),*]);
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($($x:expr),*) => (vec![$($x),*])
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}
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// Define io_uring syscalls as they are not yet part of libc.
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const SYS_IO_URING_ENTER: i64 = 426;
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// See include/uapi/asm-generic/ioctls.h in the kernel code.
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const FIONBIO: u64 = 0x5421;
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fn virtio_balloon_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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// The filter containing the allowed syscall rules required by the
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// virtio_blk thread to function.
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fn virtio_blk_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_fallocate),
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allow_syscall(libc::SYS_fdatasync),
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allow_syscall(libc::SYS_fsync),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_ftruncate),
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#[cfg(target_arch = "aarch64")]
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// The definition of libc::SYS_ftruncate is missing on AArch64.
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// Use a hard-code number instead.
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allow_syscall(46),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_lseek),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_mmap),
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allow_syscall(libc::SYS_mprotect),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_openat),
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allow_syscall(libc::SYS_prctl),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sched_getaffinity),
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allow_syscall(libc::SYS_set_robust_list),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_blk_io_uring_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_fsync),
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allow_syscall(libc::SYS_futex),
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allow_syscall(SYS_IO_URING_ENTER),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_console_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_mmap),
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allow_syscall(libc::SYS_mprotect),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_prctl),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sched_getaffinity),
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allow_syscall(libc::SYS_set_robust_list),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_iommu_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_mmap),
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allow_syscall(libc::SYS_mprotect),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_mem_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_fallocate),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_net_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_net_ctl_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_pmem_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_fsync),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_rng_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_mmap),
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allow_syscall(libc::SYS_mprotect),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_prctl),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sched_getaffinity),
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allow_syscall(libc::SYS_set_robust_list),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_vhost_blk_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_vhost_fs_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_mmap),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_recvmsg),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sendmsg),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_vhost_net_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_write),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_munmap),
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#[cfg(target_arch = "aarch64")]
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allow_syscall(libc::SYS_madvise),
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#[cfg(target_arch = "aarch64")]
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allow_syscall(libc::SYS_exit),
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])
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}
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fn virtio_vhost_net_ctl_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_read),
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#[cfg(target_arch = "aarch64")]
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allow_syscall(libc::SYS_sigaltstack),
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#[cfg(target_arch = "aarch64")]
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allow_syscall(libc::SYS_munmap),
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#[cfg(target_arch = "aarch64")]
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allow_syscall(libc::SYS_madvise),
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#[cfg(target_arch = "aarch64")]
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allow_syscall(libc::SYS_exit),
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])
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}
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fn create_vsock_ioctl_seccomp_rule() -> Result<Vec<SeccompRule>, Error> {
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Ok(or![and![Cond::new(1, ArgLen::DWORD, Eq, FIONBIO,)?],])
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}
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fn virtio_vsock_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_accept4),
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall_if(libc::SYS_ioctl, create_vsock_ioctl_seccomp_rule()?),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_read),
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allow_syscall(libc::SYS_recvfrom),
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allow_syscall(libc::SYS_rt_sigprocmask),
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allow_syscall(libc::SYS_sigaltstack),
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allow_syscall(libc::SYS_write),
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])
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}
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fn virtio_watchdog_thread_rules() -> Result<Vec<SyscallRuleSet>, Error> {
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Ok(vec![
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allow_syscall(libc::SYS_brk),
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allow_syscall(libc::SYS_close),
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allow_syscall(libc::SYS_dup),
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allow_syscall(libc::SYS_epoll_create1),
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allow_syscall(libc::SYS_epoll_ctl),
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allow_syscall(libc::SYS_epoll_pwait),
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#[cfg(target_arch = "x86_64")]
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allow_syscall(libc::SYS_epoll_wait),
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allow_syscall(libc::SYS_exit),
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allow_syscall(libc::SYS_futex),
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allow_syscall(libc::SYS_madvise),
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allow_syscall(libc::SYS_mmap),
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allow_syscall(libc::SYS_mprotect),
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allow_syscall(libc::SYS_munmap),
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allow_syscall(libc::SYS_prctl),
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allow_syscall(libc::SYS_read),
|
|
allow_syscall(libc::SYS_rt_sigprocmask),
|
|
allow_syscall(libc::SYS_sched_getaffinity),
|
|
allow_syscall(libc::SYS_set_robust_list),
|
|
allow_syscall(libc::SYS_sigaltstack),
|
|
allow_syscall(libc::SYS_timerfd_settime),
|
|
allow_syscall(libc::SYS_write),
|
|
])
|
|
}
|
|
|
|
fn get_seccomp_filter_trap(thread_type: Thread) -> Result<SeccompFilter, Error> {
|
|
let rules = match thread_type {
|
|
Thread::VirtioBalloon => virtio_balloon_thread_rules()?,
|
|
Thread::VirtioBlk => virtio_blk_thread_rules()?,
|
|
Thread::VirtioBlkIoUring => virtio_blk_io_uring_thread_rules()?,
|
|
Thread::VirtioConsole => virtio_console_thread_rules()?,
|
|
Thread::VirtioIommu => virtio_iommu_thread_rules()?,
|
|
Thread::VirtioMem => virtio_mem_thread_rules()?,
|
|
Thread::VirtioNet => virtio_net_thread_rules()?,
|
|
Thread::VirtioNetCtl => virtio_net_ctl_thread_rules()?,
|
|
Thread::VirtioPmem => virtio_pmem_thread_rules()?,
|
|
Thread::VirtioRng => virtio_rng_thread_rules()?,
|
|
Thread::VirtioVhostBlk => virtio_vhost_blk_thread_rules()?,
|
|
Thread::VirtioVhostFs => virtio_vhost_fs_thread_rules()?,
|
|
Thread::VirtioVhostNet => virtio_vhost_net_thread_rules()?,
|
|
Thread::VirtioVhostNetCtl => virtio_vhost_net_ctl_thread_rules()?,
|
|
Thread::VirtioVsock => virtio_vsock_thread_rules()?,
|
|
Thread::VirtioWatchdog => virtio_watchdog_thread_rules()?,
|
|
};
|
|
|
|
Ok(SeccompFilter::new(
|
|
rules.into_iter().collect(),
|
|
SeccompAction::Trap,
|
|
)?)
|
|
}
|
|
|
|
fn get_seccomp_filter_log(thread_type: Thread) -> Result<SeccompFilter, Error> {
|
|
let rules = match thread_type {
|
|
Thread::VirtioBalloon => virtio_balloon_thread_rules()?,
|
|
Thread::VirtioBlk => virtio_blk_thread_rules()?,
|
|
Thread::VirtioBlkIoUring => virtio_blk_io_uring_thread_rules()?,
|
|
Thread::VirtioConsole => virtio_console_thread_rules()?,
|
|
Thread::VirtioIommu => virtio_iommu_thread_rules()?,
|
|
Thread::VirtioMem => virtio_mem_thread_rules()?,
|
|
Thread::VirtioNet => virtio_net_thread_rules()?,
|
|
Thread::VirtioNetCtl => virtio_net_ctl_thread_rules()?,
|
|
Thread::VirtioPmem => virtio_pmem_thread_rules()?,
|
|
Thread::VirtioRng => virtio_rng_thread_rules()?,
|
|
Thread::VirtioVhostBlk => virtio_vhost_blk_thread_rules()?,
|
|
Thread::VirtioVhostFs => virtio_vhost_fs_thread_rules()?,
|
|
Thread::VirtioVhostNet => virtio_vhost_net_thread_rules()?,
|
|
Thread::VirtioVhostNetCtl => virtio_vhost_net_ctl_thread_rules()?,
|
|
Thread::VirtioVsock => virtio_vsock_thread_rules()?,
|
|
Thread::VirtioWatchdog => virtio_watchdog_thread_rules()?,
|
|
};
|
|
|
|
Ok(SeccompFilter::new(
|
|
rules.into_iter().collect(),
|
|
SeccompAction::Log,
|
|
)?)
|
|
}
|
|
|
|
/// Generate a BPF program based on the seccomp_action value
|
|
pub fn get_seccomp_filter(
|
|
seccomp_action: &SeccompAction,
|
|
thread_type: Thread,
|
|
) -> Result<BpfProgram, SeccompError> {
|
|
match seccomp_action {
|
|
SeccompAction::Allow => Ok(vec![]),
|
|
SeccompAction::Log => get_seccomp_filter_log(thread_type)
|
|
.and_then(|filter| filter.try_into())
|
|
.map_err(SeccompError::SeccompFilter),
|
|
_ => get_seccomp_filter_trap(thread_type)
|
|
.and_then(|filter| filter.try_into())
|
|
.map_err(SeccompError::SeccompFilter),
|
|
}
|
|
}
|