io_jail: Add InvalidPath error

parse_seccomp_filters in libminijail will unhelpfully abort() if the
path doesn't exist. Check that the policy file exists so that there's
a semi-useful error message.

BUG=none
TEST=crosvm run without seccomp policy in current directory; no abort

Change-Id: Ie1123e8cae3f6a27bbd5a3128161364401e8d4b2
Signed-off-by: Stephen Barber <smbarber@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/585829
Reviewed-by: Dylan Reid <dgreid@chromium.org>
1 file changed
tree: 4334719fcb2d355e90f04998e90f8c502831c6ef
  1. data_model/
  2. io_jail/
  3. kernel_loader/
  4. kvm/
  5. kvm_sys/
  6. net_sys/
  7. net_util/
  8. src/
  9. sys_util/
  10. syscall_defines/
  11. vhost/
  12. virtio_sys/
  13. x86_64/
  14. .gitignore
  15. block_device.policy
  16. Cargo.toml
  17. LICENSE
  18. net_device.policy
  19. README.md
README.md

Chrome OS KVM

This component, known as crosvm, runs untrusted operating systems along with virtualized devices. No actual hardware is emulated. This only runs VMs through the Linux's KVM interface. What makes crosvm unique is a focus on safety within the programming language and a sandbox around the virtual devices to protect the kernel from attack in case of an exploit in the devices.

Overview

The crosvm source code is organized into crates, each with their own unit tests. These crates are:

  • kernel_loader Loads elf64 kernel files to a slice of memory.
  • kvm_sys low-level (mostly) auto-generated structures and constants for using KVM
  • kvm unsafe, low-level wrapper code for using kvm_sys
  • crosvm the top-level binary front-end for using crosvm
  • x86_64 Support code specific to 64 bit intel machines.

Usage

Currently there is no front-end, so the best you can do is run cargo test in each crate.