android_webview
apps
ash
base
build
build_overrides
buildtools
cc
chrome
chromecast
chromeos
cloud_print
codelabs
components
content
courgette
crypto
dbus
device
docs
accessibility
autofill
design
enterprise
fuchsia
gpu
images
infra
ios
linux
build_instructions.md
building_debug_gtk.md
cast_build_instructions.md
cert_management.md
chromium_arm.md
chromium_packages.md
crash_dumping.md
debugging.md
debugging_gtk.md
debugging_ssl.md
dependencies.md
dev_build_as_default_browser.md
development.md
eclipse_dev.md
graphics_pipeline.md
gtk_theme_integration.md
hw_video_decode.md
instrumented_libraries.md
minidump_to_core.md
ozone_drm.md
password_storage.md
pid_namespace_support.md
plugins.md
profiling.md
proxy_config.md
sandbox_ipc.md
sandboxing.md
suid_sandbox.md
suid_sandbox_development.md
sysroot.md
using_a_chroot.md
zygote.md
login
mac
media
memory
memory-infra
patterns
privacy
privacy_budget
process
security
speed
speed_metrics
standards
sync
testing
ui
updater
workflow
DIR_METADATA
OWNERS
README.md
accessibility.md
ad_tagging.md
adding_to_third_party.md
android_accessing_cpp_enums_in_java.md
android_accessing_cpp_features_in_java.md
android_accessing_cpp_switches_in_java.md
android_build_instructions.md
android_cast_build_instructions.md
android_debugging_instructions.md
android_dynamic_feature_modules.md
android_emulator.md
android_logging.md
android_native_libraries.md
android_studio.md
angle_in_chromium.md
api_keys.md
asan.md
atom.md
bitmap_pipeline.md
branch_sheriff.md
building_old_revisions.md
callback.md
ccache_mac.md
chrome_os_logging.md
chrome_settings.md
chrome_untrusted.md
chromedriver_status.md
chromeos_build_instructions.md
chromeos_glossary.md
chromium_browser_vs_google_chrome.md
cipd_and_3pp.md
cl_respect.md
clang.md
clang_code_coverage_wrapper.md
clang_format.md
clang_sheriffing.md
clang_static_analyzer.md
clang_tidy.md
clang_tool_refactoring.md
clangd.md
clion.md
closure_compilation.md
cocoa_tips_and_tricks.md
code_review_owners.md
code_reviews.md
commit_checklist.md
component_build.md
configuration.md
contributing.md
cq_quick_run.md
cr_respect.md
cr_user_manual.md
cross_platform_ui.md
cygwin_dll_remapping_failure.md
dbus_mojo_connection_service.md
debugging_with_crash_keys.md
deterministic_builds.md
disassemble_code.md
documentation_best_practices.md
documentation_guidelines.md
early-hints.md
eclipse.md
emacs.md
erc_irc.md
flag_expiry.md
flag_ownership.md
gdbinit.md
get_the_code.md
git_cookbook.md
git_tips.md
google_chrome_branded_builds.md
google_play_services.md
graphical_debugging_aid_chromium_views.md
gwp_asan.md
how_cc_works.md
how_to_add_your_feature_flag.md
how_to_extend_web_test_framework.md
idn.md
initialize_blink_features.md
inlined_stack_traces.md
installation_at_vmware.md
ios_build_instructions.md
ios_infra.md
ios_voiceover.md
kiosk_mode.md
lacros.md
lldbinit.md
luci_migration_faq.md
mac_arm64.md
mac_build_instructions.md
mac_lld.md
mojo_and_services.md
mojo_ipc_conversion.md
mojo_testing.md
native_relocations.md
navigation-request-navigation-state.gv
navigation-request-navigation-state.png
navigation.md
navigation_concepts.md
network_traffic_annotations.md
new_port_policy.md
no_sources_assignment_filter.md
optimizing_web_uis.md
origin_trials_integration.md
ozone_overview.md
parsing_test_results.md
pgo.md
piranha_plant.md
profiling.md
profiling_content_shell_on_android.md
proxy_auto_config.md
python3_migration.md
qtcreator.md
release_branch_guidance.md
render-frame-host-lifecycle-state.gv
render-frame-host-lifecycle-state.png
render_document.md
seccomp_sandbox_crash_dumping.md
servicification.md
session_history.md
sheriff.md
shutdown.md
special_case_urls.md
static_initializers.md
sublime_ide.md
system_hardening_features.md
tab_helpers.md
threading_and_tasks.md
threading_and_tasks_faq.md
threading_and_tasks_testing.md
toolchain_support.md
tour_of_luci_ui.md
tpm_quick_ref.md
translation_screenshots.md
trusted_types_on_webui.md
updating_clang.md
updating_clang_format_binaries.md
use_counter_wiki.md
useful_urls.md
user_data_dir.md
user_data_storage.md
user_handle_mapping.md
vanilla_msysgit_workflow.md
vscode.md
vscode_python.md
webui_explainer.md
webui_in_chrome.md
webui_in_components.md
webview_policies.md
win_cross.md
win_order_files.md
windows_build_instructions.md
windows_native_window_occlusion_tracking.md
windows_pwa_integration.md
windows_shortcut_and_taskbar_handling.md
windows_split_dll.md
windows_virtual_desktop_handling.md
wmax_tokens.md
working_remotely_with_android.md
writing_clang_plugins.md
extensions
fuchsia
gin
google_apis
google_update
gpu
headless
infra
ios
ipc
jingle
media
mojo
native_client_sdk
net
pdf
ppapi
printing
remoting
rlz
sandbox
services
skia
sql
storage
styleguide
testing
third_party
tools
ui
url
weblayer
.clang-format
.clang-tidy
.eslintrc.js
.git-blame-ignore-revs
.gitattributes
.gitignore
.gn
.mailmap
.vpython
.vpython3
.yapfignore
AUTHORS
BUILD.gn
CODE_OF_CONDUCT.md
DEPS
DIR_METADATA
ENG_REVIEW_OWNERS
LICENSE
LICENSE.chromium_os
OWNERS
PRESUBMIT.py
PRESUBMIT_test.py
PRESUBMIT_test_mocks.py
README.md
WATCHLISTS
codereview.settings

This is a followup to [1]. [1] https://chromium-review.googlesource.com/c/chromium/src/+/1974901 TBR=sky Change-Id: I442ffe121378607bdc5e1b16c081b8d66b138955 Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1980900 Reviewed-by: Thomas Anderson <thomasanderson@chromium.org> Commit-Queue: Thomas Anderson <thomasanderson@chromium.org> Cr-Commit-Position: refs/heads/master@{#727226}
1.1 KiB
1.1 KiB
Linux PID Namespace Support
The LinuxSUIDSandbox currently relies on support for
the CLONE_NEWPID
flag in Linux's
clone() system call.
You can check whether your system supports PID namespaces with the code below,
which must be run as root:
#define _GNU_SOURCE
#include <unistd.h>
#include <sched.h>
#include <stdio.h>
#include <sys/wait.h>
#if !defined(CLONE_NEWPID)
#define CLONE_NEWPID 0x20000000
#endif
int worker(void* arg) {
const pid_t pid = getpid();
if (pid == 1) {
printf("PID namespaces are working\n");
} else {
printf("PID namespaces ARE NOT working. Child pid: %d\n", pid);
}
return 0;
}
int main() {
if (getuid()) {
fprintf(stderr, "Must be run as root.\n");
return 1;
}
char stack[8192];
const pid_t child = clone(worker, stack + sizeof(stack), CLONE_NEWPID, NULL);
if (child == -1) {
perror("clone");
fprintf(stderr, "Clone failed. PID namespaces ARE NOT supported\n");
}
waitpid(child, NULL, 0);
return 0;
}