The `CreateMemFd` function sets the `MFD_ALLOW_SEALING` flag which enables seals to be set and creating an empty file seal.
PiperOrigin-RevId: 550850108
Change-Id: I1a84b7b14cc9396144048bbeb8995f2f7eca9fb7
In cases where SAPI users overwrite the default policy instead of extending it, the sandbox will fail with an `openat` violation. This is automatically inherited in the default policy.
The advantage with this implementation is that we don't expose the open* syscalls when not running under the sanitizers.
PiperOrigin-RevId: 550845188
Change-Id: I151d467848983b00b71ec8447d662394fa7176db
This is to facilitate online/offline core counting for an accurate count of the
maximum CPU ID that may be seen.
PiperOrigin-RevId: 548715133
Change-Id: I159c0d51b9800fa633172986ba4f8eca352ae336
- If --sandbox2_danger_danger_permit_all_and_log is set, we write to a logfile (passed via the flag).
- If --sandbox2_danger_danger_permit_all is set, we do not write any log information.
This change introduces a means to also see the syscall information on stderr by passing --v=1 and --alsologtostderr.
PiperOrigin-RevId: 542232271
Change-Id: Ie4d30f0d8e25bb1de7c60bb37736b27b89406336
This should only affect the Bazel `BUILD.bazel` files and their formatting.
PiperOrigin-RevId: 538426054
Change-Id: I0162726d3fb4bcb4d7938cddc6f39e0d9f2b4a3d
Also make sure we don't kill everything (with a `kill(-1, SIGKILL)`) if reading the pid fails.
PiperOrigin-RevId: 536371566
Change-Id: I17f6ae36b73ec43735709ff16d276abaebb00d44
This makes should ensure global forkserver will be single threaded before forking the sandboxees as it does not go through WaitAndFork.
Waiting for sanitizers is not needed in the monitor and should reduce latency
by 1 second for all sanitizer builds. Currently it'll always wait up to 1 seconds for the process to become single-threaded, which will never happen as monitor itself is running in a separate thread.
PiperOrigin-RevId: 530878018
Change-Id: Ie9f663848502f2738721861b0ba2dc6f3cc9f1c9
Allows to create a Comms with unix domain sockets that are not abstract. This allows to use Comms to talk across network namespaces
PiperOrigin-RevId: 518854724
Change-Id: I4fd65466bba9512f448b73bde367f38a0fbb584d
Fixes incorrect timeout calculation and increases the wakeup interval.
Also makes poll behave correctly in presence of signals.
PiperOrigin-RevId: 516514260
Change-Id: I035701e1bb351f9ad26157b59b13b4f300cc229a
Unotify based monitor should bring big performance wins
if the sandboxee heavily uses threading or signals.
Some of the features are not supported in that mode:
- execveat is always allowed instead of just the initial one
- stack traces are not collected on normal exit or if the process is terminated by signal
PiperOrigin-RevId: 515040101
Change-Id: Ia5574d34b4ff7e91e3601edb8c9cb913e011fbf6
When symbolize.cc is built with unwind tables function from the lib calling into symbolize.cc might be duplicated in stack trace (libunwind fallback to LR)
PiperOrigin-RevId: 514324815
Change-Id: I76ee4ccf5aaf388924714284d9896fa367f5f752
Running with a permissive test policy should not interfere with sanitizers
or coverage.
Most tests should run with such a permissive policy.
The exception are tests which actually tests policy enforcement.
PiperOrigin-RevId: 513548936
Change-Id: I9a4c2cc8074997cff08cc22d15f4736219ce4d63
Check unwinding recursive calls.
Verify we can unwind in absence of unwind tables.
PiperOrigin-RevId: 513506498
Change-Id: Ib87240b7481dae3a4513c944e17a7924a54926e9
This allows to split monitor & stack_trace related targets.
Also move stack traces related functionality into MonitorBase.
PiperOrigin-RevId: 510112916
Change-Id: I60eabf9c9b3204dc369713edd8ae05fded306875
This is a preparatory step to introduce a Sandbox2 mode that does not use ptrace.
PiperOrigin-RevId: 503919613
Change-Id: I446adecc66e697c592ad938627fbfdbea12516e1
If the platform does not have `std::string_view` (i.e. `absl::string_view` is not an alias of `std::string_view`) the lookup will cause build failure.
PiperOrigin-RevId: 503159858
Change-Id: Ide8229ae0219d1cb6f3b36aba26da8d53183bc4b
Libunwind sandbox no longer needs to join sandboxee's userns.
This cleans up a lot of special handling for the libunwind sandbox.
PiperOrigin-RevId: 503140778
Change-Id: I020ea3adda05ae6ff74137b668a5fa7509c138f8
when the sandboxee did not exit normally.
Disabled by default, enabled with a flag.
PiperOrigin-RevId: 502807175
Change-Id: Icb5236cbfac0168a2d855c68967f7a1e8bd13fe3
New wrappers:
- `AllowEpollWait` (`epoll_wait`, `epoll_pwait`, `epoll_pwait2`)
- `AllowInotifyInit` (`inotify_init`, `inotify_init1`)
- `AllowSelect` (`select`, `pselect6`)
- `AllowDup` (`dup`, `dup2`, `dup3`)
- `AllowPipe` (`pipe`, `pipe2`)
- `AllowChmod` (`chmod`, `fchmod`, `fchmodat`)
- `AllowChown` (`chown`, `lchown`, `fchown`, `fchownat`)
- `AllowReadlink` (`readlink`, `readlinkat`)
- `AllowLink` (`link`, `linkat`)
- `AllowSymlink` (`symlink`, `symlinkat`)
- `AllowMkdir` (`mkdir`, `mkdirat`)
- `AllowUtime` (`utime`, `utimes`, `futimens`, `utimensat`)
- `AllowAlarm` (`alarm`, `setitimer`)
- `AllowGetPGIDs` (`getpgid`, `getpgrp`)
- `AllowPoll` (`poll`, `ppoll`)
Updated wrappers:
- `AllowOpen` now includes `creat`. `openat` already grants the ability to create files, and is the designated replacement for `creat` on newer platforms.
- `AllowStat` now includes `fstatfs` and `fstatfs64`. The comment already claimed that these syscalls were included; I believe they were omitted by accident.
- `AllowUnlink` now includes `rmdir`. `unlinkat` already grants the ability to remove empty directories, and is the designated replacement for `rmdir` on newer platforms.
PiperOrigin-RevId: 495045432
Change-Id: I41eccb74fda250b27586b6b7fe4c480332e48846
On successful completion, `unw_step()` returns a positive value
if the updated cursor refers to a valid stack frame,
or `0` if the previous stack frame was the last frame in the
chain. On error, the negative value of one of the error-codes
below is returned.
PiperOrigin-RevId: 491588164
Change-Id: Ie361023ef69eed6c895856832a8208f2791f644d
Follow-up changes might be required to fully fix up the contrib sandboxes.
PiperOrigin-RevId: 482475998
Change-Id: Iff631eb838a024b2f047a1be61bb27e35a8ff2f4
This change allows Sandbox2 to change how the default FD for comms is chosen.
PiperOrigin-RevId: 479526309
Change-Id: I69add85a244bc0385eaa164ab0ea3b036503c6d3
This is to abstract the FD number away, so that we can change the way the FD number is chosen/communicated.
PiperOrigin-RevId: 479282707
Change-Id: Ic6726bcd0a17e97bde60804476ecbca2ffbf6525
We have removed an internal-only sandbox mechanism that has been deprecated
for years. Some formatting/include changes may leak into the OSS version.
PiperOrigin-RevId: 475230500
Change-Id: Ib4efdf3282529ea50e8302e5ef7acfdd7d4c68e5
If it isn't, assume that the process has exited and the event msg contains an exit code.
PiperOrigin-RevId: 471258449
Change-Id: I44408c30fe7fb39e20b55cea871f3efb68fcde67
Instead of doing waitpid() and processing one thread at a time, gather all waiting threads and then process them.
This avoids starving older threads when newer threads raise a lot of events.
PiperOrigin-RevId: 466366533
Change-Id: I81a878f038feac86407a8e961ecba181004f0f8a
E.g. a failed `KillSandboxee` for a timeout would already set the exit status code while there could be an external kill pending at the same time which would try to `KillSandboxee` again and thus set exit status code again.
PiperOrigin-RevId: 448464765
Change-Id: Ic5744a576c4255504bfb1d5c4f33253b5bb32b6f
This should make multithreaded sandboxees that exec (or send `SIGKILL`) behave more reliably.
PiperOrigin-RevId: 447458426
Change-Id: Ifdace340462199dc24c8cdf25d589ef6b24991e1
Instead of calling `google::InitGoogleLogging()` directly, introduce an
indirection via a new utility library. After this change, Sandboxed API
should consistently use `sapi::InitLogging()` everywhere.
For now, `sapi::InitLogging()` simply calls its glog equivalent. However,
this enables us to migrate away from the gflags dependency and use Abseil
flags. Once a follow-up change lands, `sapi::InitLogging()` will instead
initialize the google logging library with flags defined from Aseil.
Later still, once Abseil releases logging, we can then drop the glog
dependency entirely.
PiperOrigin-RevId: 445363592
Change-Id: Ia23a7dc88b8ffe65a422ea4d5233bba7bdd1303a
Internally, we rely on clang-tidy to warn about using deprecated declarations.
And for using deprecated declarations within SAPI itself, we should not warn.
Drive-by:
- Fix warning in `mounts_test.cc`
PiperOrigin-RevId: 443634512
Change-Id: I7ef66f0ba77201026490baab07766510c1c55c6a
`BUILD_TESTING` is a CMake provided option and we should use similar naming,
just like how Abseil does it.
- `SAPI_ENABLE_TESTS` -> `SAPI_BUILD_TESTING`
- `SAPI_ENABLE_CONTRIB_TESTS` -> `SAPI_CONTRIB_BUILD_TESTING`
- `SAPI_ENABLE_EXAMPLES` -> `SAPI_BUILD_EXAMPLES`
Drive-by:
- Fix option name in GitHub action
PiperOrigin-RevId: 443305932
Change-Id: Ice2b42be1229a0f9ae7c2ceda9ce87187baf22c4
Including the `CTest` modules ensures that the `BUILD_TESTING` option is
defined and automatically calls `enable_testing()` if needed. It does not
change the default or introduce any dependencies on its own.
This follows what Abseil already does in their top-level `CMakeLists.txt`.
PiperOrigin-RevId: 443305646
Change-Id: If067c17470f497437c7748aab4aab5227c26e84f
This fixes the main issue (#118) with stack traces on Fedora, which uses a
`/lib64` and `/usr/lib64`.
PiperOrigin-RevId: 437717858
Change-Id: I6986aa84c2be57ae1d9f8d0cb9b508768d27f1c1
