75 Commits

Author SHA1 Message Date
Ian Lance Taylor
645ea53019 runtime: in asan mode call __lsan_do_leak_check when exiting
This enables the ASAN default behavior of reporting C memory leaks.
It can be disabled with ASAN_OPTIONS=detect_leaks=0.

Fixes #67833

Change-Id: I420da1b5d79cf70d8cf134eaf97bf0a22f61ffd0
Cq-Include-Trybots: luci.golang.try:gotip-linux-amd64-asan-clang15,gotip-linux-arm64-asan-clang15
Reviewed-on: https://go-review.googlesource.com/c/go/+/651755
Reviewed-by: Cherry Mui <cherryyz@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Ian Lance Taylor <iant@google.com>
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2025-03-05 18:23:46 -08:00
Carlos Ramos Carreño
1959703ddd syscall: skip testAmbientCaps tests if there is no nobody user
When there is not a nobody user (for example inside Docker), the
tests TestAmbientCaps and TestAmbientCapsUserns should be skipped
instead of failing.

Fixes #71644

Change-Id: I7f92db19e2b6f449d8d897650a0ecd89f5150f4a
GitHub-Last-Rev: a4c4f5bb61929b4981dc0b92d773bd4ef13d7d3d
GitHub-Pull-Request: golang/go#71729
Reviewed-on: https://go-review.googlesource.com/c/go/+/649396
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Auto-Submit: Ian Lance Taylor <iant@golang.org>
Reviewed-by: Carlos Amedee <carlos@golang.org>
2025-02-14 14:00:03 -08:00
Kir Kolyshkin
763781c6ec syscall: use testenv.Executable
Change-Id: I4390d4bfb7deb974df6546e30ebbb4b6fff74730
Reviewed-on: https://go-review.googlesource.com/c/go/+/609836
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Tobias Klauser <tobias.klauser@gmail.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2024-09-03 20:11:34 +00:00
Michael Stapelberg
d05af62695 syscall: skip TestAmbientCapsUserns when restricted, document
fixes golang/go#67088

Change-Id: I42e7a8d02b161187772f147e3e136ab6e0f71d7f
Reviewed-on: https://go-review.googlesource.com/c/go/+/585059
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Reviewed-by: Ian Lance Taylor <iant@google.com>
2024-05-15 07:45:37 +00:00
guoguangwu
269e0df5f3 syscall: fix typo in comment
Change-Id: I1804315fd3ec50ab1e3f480efd92c59e36fd47d0
GitHub-Last-Rev: 07d969ab71eabfe7034b62f45a1f4058b66ee014
GitHub-Pull-Request: golang/go#65921
Reviewed-on: https://go-review.googlesource.com/c/go/+/566615
Auto-Submit: Ian Lance Taylor <iant@google.com>
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Reviewed-by: Emmanuel Odeke <emmanuel@orijtech.com>
Reviewed-by: Carlos Amedee <carlos@golang.org>
2024-02-27 16:40:42 +00:00
Kir Kolyshkin
ff05cdbd2b internal/syscall/unix: add PidFDSendSignal for Linux
CL 520266 added pidfd_send_signal linux syscall numbers to the
syscall package for the sake of a unit test.

As pidfd_send_signal will be used from the os package, let's revert the
changes to syscall package, add the pidfd_send_signal syscall numbers
and the implementation to internal/syscall/unix, and change the above
test to use it.

Updates #51246.
For #62654.

Change-Id: I862174c3c1a64baf1080792bdb3a1c1d1b417bb4
Reviewed-on: https://go-review.googlesource.com/c/go/+/528436
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2023-11-21 22:23:07 +00:00
Michael Pratt
4a2408289c syscall: check SyscallIsNotSupported in TestPidFDWithUserNS
For #51246.

Change-Id: Ief2e2e14f039123a6580cb60be7ee74f4a20a649
Reviewed-on: https://go-review.googlesource.com/c/go/+/544318
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2023-11-21 21:40:03 +00:00
Kir Kolyshkin
f7b2779086 syscall: fix getting pidfd when using CLONE_NEWUSER
While working on CL 528798, I found out that sys.PidFD field (added
in CL 520266) is not filled in when CLONE_NEWUSER is used.

This happens because the code assumed that the parent and the child
run in the same memory space. This assumption is right only when
CLONE_VM is used for clone syscall, and the code only sets CLONE_VM
when CLONE_NEWUSER is not used.

Fix this, and add a test case (which fails before the fix).

Updates #51246.

Change-Id: I805203c1369cadd63d769568b132a9ffd92cc184
Reviewed-on: https://go-review.googlesource.com/c/go/+/542698
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2023-11-21 20:13:01 +00:00
Jes Cok
9b883484a8 all: clean unnecessary casts for test files
This is a follow up of CL 528696.

Change-Id: I5b71eabedb12567c4b1b36f7182a3d2b0ed662a5
GitHub-Last-Rev: acaf3ac11c38042ad27b99e1c70a3c9f1a554a15
GitHub-Pull-Request: golang/go#62713
Reviewed-on: https://go-review.googlesource.com/c/go/+/529197
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2023-09-22 16:22:42 +00:00
Dmitri Shuralyov
527b6bbac1 syscall: skip unshare tests if mount syscall is not available
CL 513779 added crude skips for tests that couldn't work when run under
'unshare --net --map-root-user' as used by the current iteration of the
no-network check in LUCI. Bryan suggested a more targeted way to detect
when the environment is insufficient, which makes it possible to remove
the builder-specific skip and its slightly incorrect explaining comment.

Updates #30612.

Change-Id: I0de79f44ab94d7f1018384c2e959ca7df3a1b0ae
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2023-09-08 17:56:56 +00:00
Kir Kolyshkin
da7ee57f40 syscall: add support to get pidfd from ForkExec on Linux
Add PidFD support, so that if the PidFD pointer in SysProcAttr is not
nil, ForkExec (and thus all its users) obtains a pidfd from the kernel
during clone(), and writes the result (or -1, if the functionality
is not supported by the kernel) into *PidFD.

The functionality to get pidfd is implemented for both clone3 and clone.
For the latter, an extra argument to rawVforkSyscall is needed, thus the
change in asm files.

Add a trivial test case checking the obtained pidfd can be used to send
a signal to a process, using pidfd_send_signal. To test clone3 code path,
add a flag available to tests only.

Updates #51246.

Change-Id: I2212b69e1a657163c31b4a6245b076bc495777a3
Reviewed-on: https://go-review.googlesource.com/c/go/+/520266
Auto-Submit: Ian Lance Taylor <iant@google.com>
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2023-09-07 19:11:15 +00:00
Dmitri Shuralyov
0dfb22ed70 all: use ^TestName$ regular pattern for invoking a single test
Use ^ and $ in the -run flag regular expression value when the intention
is to invoke a single named test. This removes the reliance on there not
being another similarly named test to achieve the intended result.

In particular, package syscall has tests named TestUnshareMountNameSpace
and TestUnshareMountNameSpaceChroot that both trigger themselves setting
GO_WANT_HELPER_PROCESS=1 to run alternate code in a helper process. As a
consequence of overlap in their test names, the former was inadvertently
triggering one too many helpers.

Spotted while reviewing CL 525196. Apply the same change in other places
to make it easier for code readers to see that said tests aren't running
extraneous tests. The unlikely cases of -run=TestSomething intentionally
being used to run all tests that have the TestSomething substring in the
name can be better written as -run=^.*TestSomething.*$ or with a comment
so it is clear it wasn't an oversight.

Change-Id: Iba208aba3998acdbf8c6708e5d23ab88938bfc1e
Reviewed-on: https://go-review.googlesource.com/c/go/+/524948
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2023-09-05 23:35:29 +00:00
Kir Kolyshkin
0e1a9e1867 syscall: fixup TestUseCgroupFD error checking
Fixup for CL 520265; of course errors returned from os/exec are wrapped.

While at it, change the order -- it seems more readable this way.

Change-Id: Ifb5d0c113f4fb2b3cc4be922021dbd2a8a886b7b
Reviewed-on: https://go-review.googlesource.com/c/go/+/524959
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2023-09-05 12:31:06 +00:00
Kir Kolyshkin
e7fbd28a4d syscall: inline TestUseCgroupFDHelper
This way, the test case is self-contained, and the test output no longer
has useless lines related to TestUseCgroupFDHelper.

Change-Id: I575a03b678c8c08a87353f6dc00c35a90ec561ca
Reviewed-on: https://go-review.googlesource.com/c/go/+/525196
Reviewed-by: Ian Lance Taylor <iant@google.com>
Auto-Submit: Tobias Klauser <tobias.klauser@gmail.com>
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2023-09-03 13:53:50 +00:00
Kir Kolyshkin
38b623f42d syscall: fix skipping TestUseCgroupFD
The check in prepareCgroupFD tried to find out if clone3 with
CLONE_INTO_CGROUP flag is supported, by supplying arguments in
SysProcAttr that will make ForkExec use clone3 with CLONE_INTO_CGROUP
and fail.

CL 456375 inadvertently broke the above check by adding more errno
values to ignore. As a result, TestUseCgroupFD is always skipped, even
when the test could in fact be run.

Fix by removing the check entirely, instead let's use the functionality
and figure out from the errno if this has failed because of unsupported
syscall, lack of permissions, or other reason.

Change-Id: I108b27b6cfeec390ebd3f161ac39e8597569b666
Reviewed-on: https://go-review.googlesource.com/c/go/+/520265
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2023-09-01 04:33:32 +00:00
Bryan C. Mills
db24f63b10 syscall: skip TestUnshareMountNameSpaceChroot on platforms that require external linking
TestUnshareMountNameSpaceChroot attempts to build a statically-linked
binary to run in a chroot, and sets CGO_ENABLED=0 in order to do so.
Rather than trying to figure out some other way to coax the linker
into building a static binary, let's just skip the test on Linux
platforms that require external linking (namely android/arm).

This should fix the build failure reported in
https://build.golang.org/log/1ea245a9c2e916c81043db177be76778bab00058.

While we're here, let's also fix the failure logging to make the text
readable!

Updates #46330.

Change-Id: I4fa07640ce012ac141bf4698bc3215a7f146062c
Reviewed-on: https://go-review.googlesource.com/c/go/+/522182
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2023-08-24 17:32:08 +00:00
Dmitri Shuralyov
2ad666dea0 syscall, cmd/cgo: skip tests that shouldn't run under 'unshare -n -r'
A small number of tests in the main tree are currently skipped in LUCI
because our builders there run tests without root. Unfortunately, these
tests begin to run when run under 'unshare -n -r' as implemented in
the current iteration of a no-network check. Add targeted builder-only
skips so that they don't begin to run and fail with a false positive.

Updates #10719.
For #30612.

Change-Id: I6dd320714a279c395882c1b2ebfbb2fce58f913b
Reviewed-on: https://go-review.googlesource.com/c/go/+/513779
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2023-07-28 21:31:41 +00:00
Dmitri Shuralyov
9c62ef1243 syscall: skip TestUnshare if there's nothing more to unshare
Tests that need to use the internet are expected not to run when -short
test flag is set, and the Go build system automatically catches when a
test forgets that. It does this by unsharing all real network interfaces
and leaving only a loopback interface in a new network namespace.

TestUnshare tests that a process started with CLONE_NEWNET unshare flag
has fewer network interfaces than before. Of course, if /proc/net/dev
starts out with a single loopback interface, the test would fail with
a false positive:

=== RUN TestUnshare
exec_linux_test.go:139: Got 3 lines of output, want <3
--- FAIL: TestUnshare (0.00s)

Give the test what it wants: a skip when the environment doesn't meet
the minimum requirements for the test, and more useful log output if
it fails.

Change-Id: I6b9c29d88ce725e640a7ee86c7e1be9761f21b02
Reviewed-on: https://go-review.googlesource.com/c/go/+/513762
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2023-07-28 17:55:45 +00:00
Alexander Yastrebov
8ffc931eae all: fix spelling errors
Fix spelling errors discovered using https://github.com/codespell-project/codespell. Errors in data files and vendored packages are ignored.

Change-Id: I83c7818222f2eea69afbd270c15b7897678131dc
GitHub-Last-Rev: 3491615b1b82832cc0064f535786546e89aa6184
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2023-06-14 00:03:57 +00:00
Tobias Klauser
e64e000f55 internal/testenv, syscall: move isNotSupported to internal/testenv
This allows to use this helper function in packages other than syscall,
namely package net.

For #58114

Change-Id: I72c59ab013e9195801ff1315019ae1aef4396287
Reviewed-on: https://go-review.googlesource.com/c/go/+/476216
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2023-03-15 15:38:24 +00:00
Tobias Klauser
778f271057 syscall: handle errors.ErrUnsupported in isNotSupported
Updates #41198

Change-Id: Ifed913f6088b77abc7a21d2a79168a20799f9d0e
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2023-03-15 14:29:43 +00:00
Tobias Klauser
7c019c62fb syscall: use clone3 syscall with CLONE_NEWTIME
CLONE_NEWTIME can only be used with the clone3 and unshare system calls,
see 769071ac9f:

> All available clone flags have been used, so CLONE_NEWTIME uses the highest
> bit of CSIGNAL. It means that it can be used only with the unshare() and
> the clone3() system calls.

The clone3 syscall was added in Linux kernel version 5.3 and
CLONE_NEWTIME was added in version 5.6. However, it was non-functional
until version 6.3 (and stable versions with the corresponding fix [1]).

[1] https://lore.kernel.org/lkml/20230308105126.10107-1-tklauser@distanz.ch/

In case CLONE_NEWTIME is set in SysProcAttr.Cloneflags on an unsupported
kernel version, the fork/exec call will fail.

Fixes #49779

Change-Id: Ic3ecfc2b601bafaab12b1805d7f9512955a8c7e2
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2023-03-13 19:26:17 +00:00
Bryan C. Mills
092671423c syscall: avoid making assumptions about syscall permissions
We currently check for at least three different permission bits before
running tests that require root permissions: we look for UID 0, lack
of an LXC container, and lack of a Docker container, and probe a
number of distro-specific files in /proc and /sys.

The sheer number of these checks suggests that we have probably missed
at least one. Per Alan J. Perlis, “If you have a procedure with ten
parameters, you probably missed some.” (And, indeed, we definitely
have: a Debian patch¹ adds one more environment check!)

CL 58170 added some of these container checks, but “decided to go this
way instead of just skipping os.IsPermission errors because many of
those tests were specifically written to check false positive
permission errors.” However, we can't in general distinguish between a
false-positive error and a real one caused by a container: if one is
making a change to the syscall package, they should run the tests with
-v and check for unexpected skips.

Notably:

- TestUnshare already skips itself if the command fails with an error
  ending in the string "operation not permitted", which could be caused
  by a variety of possible bugs.

- The Unshare tests added in CL 38471 will fail with a permission
  error if CLONE_NEWNS is not supported, but it seems to me that if
  CLONE_NEWNS is supported — sufficient to start the process! — then
  Unmount must also be supported, and the test can at least check that
  the two are consistent.

- The AmbientCaps tests should fail to start the subprocess with
  EINVAL or similar (not produce bogus output) if the kernel does not
  support ambient caps for any reason, which we can then detect.
  (If the subprocess fails in the way the test is concerned about, it
  will exit with status 2, not fail to start in the first place.)

By executing the system calls and checking for permission errors,
this change exposed an existing bug for AmbientCaps (filed as #57208),
which was detected by the linux-arm-aws builder.

For #57208.
Updates #21379.
Updates #14693.

¹https://sources.debian.org/patches/golang-1.19/1.19.3-1/0006-skip-userns-test-in-schroot-as-well.patch/

Change-Id: I9b167661fa1bb823168c8b50d8bbbf9643e49f76
Reviewed-on: https://go-review.googlesource.com/c/go/+/456375
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2023-01-27 17:37:09 +00:00
Shengjing Zhu
f721fa3be9 syscall: skip TestUseCgroupFD if cgroupfs not mounted
When building in schroot (for building Debian package),
the cgroupfs is not mounted in schroot (only sysfs is mounted).

Change-Id: Ieddac7b2f334d58d832f5d84d81af812badf3720
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2023-01-06 18:22:52 +00:00
Paul E. Murphy
b16e94d13d syscall: skip TestUseCgroupFD if cgroupfs mounted RO
The skipping logic should also trigger if /sys/fs/cgroup is
mounted read-only too. This is how it is mounted on the
ppc64le/p10 containers today.

Fixes #57262

Change-Id: Idc0ab050052ebf5777ac09f9519215b437b0ee7c
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2022-12-12 23:10:52 +00:00
Kir Kolyshkin
bca17d16ca syscall: add CgroupFD support for ForkExec on Linux
Implement CLONE_INTO_CGROUP feature, allowing to put a child in a
specified cgroup in a clean and simple way. Note that the feature only
works for cgroup v2, and requires Linux kernel 5.7 or newer.

Using the feature requires a new syscall, clone3. Currently this is the
only reason to use clone3, but the code is structured in a way so that
other cases may be easily added in the future.

Add a test case.

While at it, try to simplify the syscall calling code in
forkAndExecInChild1, which became complicated over time because:

1. It was using either rawVforkSyscall or RawSyscall6 depending on
   whether CLONE_NEWUSER was set.

2. On Linux/s390, the first two arguments to clone(2) system call are
   swapped (which deserved a mention in Linux ABI hall of shame). It
   was worked around in rawVforkSyscall on s390, but had to be
   implemented via a switch/case when using RawSyscall6, making the code
   less clear.

Let's

 - modify rawVforkSyscall to have two arguments (which is also required
   for clone3);

 - remove the arguments workaround from s390 asm, instead implementing
   arguments swap in the caller (which still looks ugly but at least
   it's done once and is clearly documented now);

 - use rawVforkSyscall for all cases (since it is essentially similar to
   RawSyscall6, except for having less parameters, not returning r2, and
   saving/restoring the return address before/after syscall on 386 and
   amd64).

Updates #51246.

Change-Id: Ifcd418ebead9257177338ffbcccd0bdecb94474e
Reviewed-on: https://go-review.googlesource.com/c/go/+/417695
Auto-Submit: Ian Lance Taylor <iant@google.com>
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
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2022-09-09 15:34:16 +00:00
Kir Kolyshkin
a0f05823e4 syscall: fix skipping some tests on Linux
The kernel knob /proc/sys/kernel/unprivileged_userns_clone is
only available in Debian (and Ubuntu) kernels, so if the tests
are run on e.g. Fedora, skipUnprivilegedUserClone() skips a lot
of tests.

Modify it to treat ENOENT as "it should work".

Change-Id: I959201ede139ede989cc8ab646c9bf51e0539ada
Reviewed-on: https://go-review.googlesource.com/c/go/+/417694
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Reviewed-by: Heschi Kreinick <heschi@google.com>
Run-TryBot: Ian Lance Taylor <iant@google.com>
Reviewed-by: Ian Lance Taylor <iant@google.com>
2022-09-03 18:21:45 +00:00
Bryan C. Mills
434b2a5d0d syscall: relax output check in TestGroupCleanupUserNamespace
“If you have a procedure with ten parameters, you probably missed some.”
― attr. Alan J. Perlis

I argue that the same is true for hard-coded special cases.

In TestGroupCleanupUserNamespace, instead of a curated list of strings
observed in the wild we now check for a prefix, as was done for
TestGroupCleanup in CL 24670.

Updates #16224.
Updates #16303.
Updates #19938.
Updates #34547.
Updates #46752.
Fixes #52088.

Change-Id: I59c5b0c048113e306996c0f8247e09c714d2423a
Reviewed-on: https://go-review.googlesource.com/c/go/+/397316
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2022-03-31 21:17:08 +00:00
Russ Cox
f229e7031a all: go fix -fix=buildtag std cmd (except for bootstrap deps, vendor)
When these packages are released as part of Go 1.18,
Go 1.16 will no longer be supported, so we can remove
the +build tags in these files.

Ran go fix -fix=buildtag std cmd and then reverted the bootstrapDirs
as defined in src/cmd/dist/buildtool.go, which need to continue
to build with Go 1.4 for now.

Also reverted src/vendor and src/cmd/vendor, which will need
to be updated in their own repos first.

Manual changes in runtime/pprof/mprof_test.go to adjust line numbers.

For #41184.

Change-Id: Ic0f93f7091295b6abc76ed5cd6e6746e1280861e
Reviewed-on: https://go-review.googlesource.com/c/go/+/344955
Trust: Russ Cox <rsc@golang.org>
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2021-10-28 18:17:57 +00:00
Russ Cox
4d8db00641 all: use bytes.Cut, strings.Cut
Many uses of Index/IndexByte/IndexRune/Split/SplitN
can be written more clearly using the new Cut functions.
Do that. Also rewrite to other functions if that's clearer.

For #46336.

Change-Id: I68d024716ace41a57a8bf74455c62279bde0f448
Reviewed-on: https://go-review.googlesource.com/c/go/+/351711
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2021-10-06 15:53:04 +00:00
Tobias Klauser
8699425b55 syscall: remove use of IN_KUBERNETES in test
CL 201737 dropped the use of IN_KUBERNETES in tests, but it looks like
it did not catch all occurrences.

For #12815
For #34956

Change-Id: I72b89bfb850ba2890e9e6aa39b87167291ab7e9f
Reviewed-on: https://go-review.googlesource.com/c/go/+/349789
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2021-09-14 14:09:54 +00:00
Rahul Bajaj
a752bc0746 syscall: fix TestGroupCleanupUserNamespace test failure on Fedora
Fixes #46752

Change-Id: I2eaa9d15fac4e859e18191fcf1372e5be94899df
GitHub-Last-Rev: 8a2672d8dc6713ec6cbd207d870e893062c8fe5b
GitHub-Pull-Request: golang/go#46753
Reviewed-on: https://go-review.googlesource.com/c/go/+/328109
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2021-06-16 04:45:46 +00:00
Russ Cox
d4b2638234 all: go fmt std cmd (but revert vendor)
Make all our package sources use Go 1.17 gofmt format
(adding //go:build lines).

Part of //go:build change (#41184).
See https://golang.org/design/draft-gobuild

Change-Id: Ia0534360e4957e58cd9a18429c39d0e32a6addb4
Reviewed-on: https://go-review.googlesource.com/c/go/+/294430
Trust: Russ Cox <rsc@golang.org>
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2021-02-20 03:54:50 +00:00
Russ Cox
4f1b0a44cb all: update to use os.ReadFile, os.WriteFile, os.CreateTemp, os.MkdirTemp
As part of #42026, these helpers from io/ioutil were moved to os.
(ioutil.TempFile and TempDir became os.CreateTemp and MkdirTemp.)

Update the Go tree to use the preferred names.

As usual, code compiled with the Go 1.4 bootstrap toolchain
and code vendored from other sources is excluded.

ReadDir changes are in a separate CL, because they are not a
simple search and replace.

For #42026.

Change-Id: If318df0216d57e95ea0c4093b89f65e5b0ababb3
Reviewed-on: https://go-review.googlesource.com/c/go/+/266365
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2020-12-09 19:12:23 +00:00
Ian Lance Taylor
910fee4ed5 syscall: append to environment in tests, don't clobber it
Fixes https://gcc.gnu.org/PR95061

Change-Id: I3cddfe5920b6da572ddeafa201617003c25175e6
Reviewed-on: https://go-review.googlesource.com/c/go/+/233318
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2020-05-11 22:26:51 +00:00
Brad Fitzpatrick
4569f1baa8 syscall: remove use of IN_KUBERNETES in test, add a TODO to improve further
Updates #34956

Change-Id: I35c39f3afda7226eeae0fd6936f7ee0d5d6c025b
Reviewed-on: https://go-review.googlesource.com/c/go/+/201737
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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Reviewed-by: Bryan C. Mills <bcmills@google.com>
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2019-10-17 17:11:19 +00:00
Tobias Klauser
ba18c7c42d syscall: fix TestGroupCleanupUserNamespace on CentOS
Update the list of expected "id" outputs in
TestGroupCleanupUserNamespace with SELinux context information as used
on CentOS.

Fixes #34547

Change-Id: I426bbe2d04e2039c87490362a1891ec3de6e36e0
Reviewed-on: https://go-review.googlesource.com/c/go/+/197841
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
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2019-09-30 16:12:05 +00:00
Tobias Klauser
5d548f1243 syscall: extend skip criteria for TestAmbientCapsUserns
TestAmbientCapsUserns also needs to be skipped, e.g. in case the test is
run inside a chroot.

Updates #34015

Change-Id: I53913432fe9408217edfe64619adbfd911a51a7a
Reviewed-on: https://go-review.googlesource.com/c/go/+/196500
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2019-09-19 15:36:49 +00:00
Tobias Klauser
d3595f7171 syscall: skip TestAmbientCapsUserns if user namespaces are not supported
Fixes #34015

Change-Id: I29798fb9c72b6f4bee8aecea96ab13b4cba2e80d
Reviewed-on: https://go-review.googlesource.com/c/go/+/195738
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2019-09-18 07:29:33 +00:00
Meng Zhuo
5ec14065dc syscall: fix skip condition in skipUnprivilegedUserClone
This is a follow up CL of CL 180877:
It will skip test create user namespaces under 3 conditions:

1. sysctl file is missing
2. file reads nothing
3. user don't have permission to create namespaces

Change-Id: I25f00a6b67213bf98d654972388637789978e1fe
Reviewed-on: https://go-review.googlesource.com/c/go/+/180937
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2019-06-06 11:40:17 +00:00
Meng Zhuo
f31b7b9b5b syscall: skip test if unprivileged_userns_clone sysctl is missing
The original test (CL 166460) didn't check the existence of
/proc/sys/kernel/unprivileged_userns_clone and continue the test
if the file doesn't exist.

Fixes #32459

Change-Id: Iab4938252fcaded32b61e17edf68f966c2565582
Reviewed-on: https://go-review.googlesource.com/c/go/+/180877
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2019-06-06 10:49:25 +00:00
Michael Stapelberg
2bd28cee23 syscall: correctly set up uid/gid mappings in user namespaces
Before this CL, uid/gid mapping was always set up from the parent
process, which is a privileged operation.

When using unprivileged user namespaces, a process can modify its
uid/gid mapping after the unshare(2) call (but setting the uid/gid
mapping from another process is NOT possible).

Fixes #29789

Change-Id: I8c96a03f5da23fe80bbb83ef051ad89cf185d750
Reviewed-on: https://go-review.googlesource.com/c/go/+/158298
Run-TryBot: Tobias Klauser <tobias.klauser@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
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2019-03-12 00:40:34 +00:00
Alberto Donizetti
1c2d4da10f syscall: skip non-root user namespace test if kernel forbids
The unprivileged_userns_clone sysctl prevents unpriviledged users from
creating namespaces, which the AmbientCaps test does. It's set to 0 by
default in a few Linux distributions (Debian and Arch, possibly
others), so we need to check it before running the test.

I've verified that setting

  echo 1 > /proc/sys/kernel/unprivileged_userns_clone

and then running the test *without this patch* makes it pass, which
proves that checking unprivileged_userns_clone is indeed sufficient.

Fixes #30698

Change-Id: Ib2079b5e714d7f2440ddf979c3e7cfda9a9c5005
Reviewed-on: https://go-review.googlesource.com/c/go/+/166460
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org>
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2019-03-10 21:01:02 +00:00
Andrei Vagin
5930c7de93 syscall: add all ambient capabilities into permitted and inheritable sets
According to the prctl man page, each capability from the ambient set
must already be present in both  the  permitted  and  the  inheritable
sets  of the process.

exec_linux_test suggests configuring the capabilities in the parent
process. This doesn't look nice, because:
* Capabilities are a per-thread attribute, so we need to use
LockOSThread.
* Need to restore capabilities after creating a process.
* Doesn't work with user namespaces, because a process gets capabilities
when a namespace is created.

Fixes #23152

Change-Id: Iba23e530fc7b9f5182d602fe855f82218f354219
Reviewed-on: https://go-review.googlesource.com/c/go/+/156577
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2019-03-08 20:53:16 +00:00
Ben Shi
225981f8e7 syscall: skip an unsupported test case on android
Lookup is not supported on android, and the test
syscall/exec_linux_test.go which relies on it will fail on
android/arm64.

Fixes #27327

Change-Id: I6fdb8992d4634ac7e3689360ff114e9431b5e90c
Reviewed-on: https://go-review.googlesource.com/131995
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
2018-08-29 03:58:42 +00:00
EduRam
ce09ce4ae0 syscall: update check for UserNS support for CentOS 7.5+
Fixes #26385

Change-Id: I5594564f42898a71d30531e5132bddb3a6915247
GitHub-Last-Rev: fbd7b38b0419e21ecd22fe802ede5c0ee3f14a9a
GitHub-Pull-Request: golang/go#26427
Reviewed-on: https://go-review.googlesource.com/124555
Reviewed-by: Ian Lance Taylor <iant@golang.org>
2018-07-18 01:16:24 +00:00
Hiroshi Ioka
8435a746f5 syscall: fix TestCloneNEWUSERAndRemapRootEnableSetgroups on linux
Despite its name, it did the same thing as
TestCloneNEWUSERAndRemapRootDisableSetgroups in old code. So fix it.

Change-Id: I21265e539179c51980e16f07a553a9bf5bb7903f
Reviewed-on: https://go-review.googlesource.com/35273
Run-TryBot: David Crawshaw <crawshaw@golang.org>
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2017-09-10 14:00:44 +00:00
Alexander Morozov
75fbc8a3d0 syscall: skip some exec tests in container
For those tests there won't be enough permissions in containers.
I decided to go this way instead of just skipping os.IsPermission errors because
many of those tests were specifically written to check false positive permission
errors.

Fixes #21379

Change-Id: Ie25e1d6d47f85bb6b570352638440f3ac1e18e03
Reviewed-on: https://go-review.googlesource.com/58170
Reviewed-by: Ian Lance Taylor <iant@golang.org>
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2017-08-23 21:46:55 +00:00
Jess Frazelle
0d482b3824 syscall: update check for UserNS support for centos 7
Fixes #20796
Fixes #16283

Change-Id: Ib11992fbd2bc1fbb3b14ae5a6bf0da2e4c12f641
Reviewed-on: https://go-review.googlesource.com/49311
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2017-07-17 18:18:08 +00:00
Brad Fitzpatrick
121d076679 syscall: skip TestUnshare on Linux upon permission error
Fixes #17206

Change-Id: Id0ebc3a55ea1c5f52608decffee04c8398a8774b
Reviewed-on: https://go-review.googlesource.com/48571
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2017-07-14 21:05:21 +00:00