| commit | 6155bd3051255038b0aa62e72fb51898e4ba771e | [log] [tgz] |
|---|---|---|
| author | Matthew Denton <mpdenton@chromium.org> | Fri Feb 18 19:41:21 2022 |
| committer | Copybara-Service <copybara-worker@google.com> | Fri Feb 18 19:57:03 2022 |
| tree | cece2c8934775dbad87cd9128932dfc39ca655c9 | |
| parent | 714d2e84b90ea1425310f1b231dad6a9c6a122f0 [diff] |
[Linux sandbox] Fix current seccomp failures pidfd_open is a syscall new in Linux 5.3. For some reason we are getting seccomp crashes for it, even though it's unused in chromium and glibc. Just return ENOSYS instead of crashing, and any code should be able to handle its nonexistence for backwards compatibility. We are also getting a lot of seccomp crashes for sched_getaffinity. There isn't enough reason to block it, so allow it (restricted to the current process) in the utility and service sandboxes. Bug: 758557 Change-Id: I0d7354839be37912f35068dfacfaf78c35e894b9 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3472467 Reviewed-by: Robert Sesek <rsesek@chromium.org> Commit-Queue: Matthew Denton <mpdenton@chromium.org> Cr-Commit-Position: refs/heads/main@{#973068} NOKEYCHECK=True GitOrigin-RevId: b2ea904d412adfeba5ff24f59497d659b2329a20
This directory contains platform-specific sandboxing libraries. Sandboxing is a technique that can improve the security of an application by separating untrustworthy code (or code that handles untrustworthy data) and restricting its privileges and capabilities.
Each platform relies on the operating system's process primitive to isolate code into distinct security principals, and platform-specific technologies are used to implement the privilege reduction. At a high-level:
mac/ uses the Seatbelt sandbox. See the detailed design for more.linux/ uses namespaces and Seccomp-BPF. See the detailed design for more.win/ uses a combination of restricted tokens, distinct job objects, alternate desktops, and integrity levels. See the detailed design for more.Built on top of the low-level sandboxing library is the //sandbox/policy component, which provides concrete policies and helper utilities for sandboxing specific Chromium processes and services. The core sandbox library cannot depend on the policy component.