| commit | af622c76124113a6616fba72c51c34fbfa96c986 | [log] [tgz] |
|---|---|---|
| author | Adrian Ratiu <adrian.ratiu@collabora.corp-partner.google.com> | Sat Aug 28 23:19:24 2021 |
| committer | Copybara-Service <copybara-worker@google.com> | Sat Aug 28 23:30:33 2021 |
| tree | e5120bb0a4c63d735a216acdbb9e29d5a39e4cc4 | |
| parent | 19e5b97d6e8100245387890a5d13cf1382348bc4 [diff] |
Linux sandbox: handle faccessat2 syscall Starting with Linux v5.8 a new syscall named faccessat2 was added to correctly implement the POSIX specified faccessat by properly handling new a fourth "flags" argument which was missing in the original faccessat in turn causing bugs in glibc which tried to "emulate" it. Starting with glibc 2.33, the new faccessat2 syscall is used so we need to handle it in the sandbox. BUG=b:187795855 Change-Id: I98117e6726a58b3a60a8b6490afc6a749b8b27b9 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3114287 Reviewed-by: Jorge Lucangeli Obes <jorgelo@chromium.org> Reviewed-by: Matthew Denton <mpdenton@chromium.org> Commit-Queue: Adrian Ratiu <adrian.ratiu@collabora.corp-partner.google.com> Auto-Submit: Adrian Ratiu <adrian.ratiu@collabora.corp-partner.google.com> Cr-Commit-Position: refs/heads/main@{#916258} NOKEYCHECK=True GitOrigin-RevId: 909ea95ed035c9e971636cdc1aa3d011db8072eb
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.