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Set stdio ownership based on the container's user to ensure the
user can open/read/write to/from stdios.
1. stdios in the host are changed to have the owner be the same
uid/gid of the process running the sandbox. This ensures that the
sandbox has full control over it.
2. stdios owner owner inside the sandbox is changed to match the
container's user to give access inside the container and make it
behave the same as runc.
Fixes #6180
PiperOrigin-RevId: 384347009
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PiperOrigin-RevId: 384344990
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PiperOrigin-RevId: 383750666
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PiperOrigin-RevId: 383705129
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PiperOrigin-RevId: 382845950
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This change makes the checklocks analyzer considerable more powerful, adding:
* The ability to traverse complex structures, e.g. to have multiple nested
fields as part of the annotation.
* The ability to resolve simple anonymous functions and closures, and perform
lock analysis across these invocations. This does not apply to closures that
are passed elsewhere, since it is not possible to know the context in which
they might be invoked.
* The ability to annotate return values in addition to receivers and other
parameters, with the same complex structures noted above.
* Ignoring locking semantics for "fresh" objects, i.e. objects that are
allocated in the local frame (typically a new-style function).
* Sanity checking of locking state across block transitions and returns, to
ensure that no unexpected locks are held.
Note that initially, most of these findings are excluded by a comprehensive
nogo.yaml. The findings that are included are fundamental lock violations.
The changes here should be relatively low risk, minor refactorings to either
include necessary annotations to simplify the code structure (in general
removing closures in favor of methods) so that the analyzer can be easily
track the lock state.
This change additional includes two changes to nogo itself:
* Sanity checking of all types to ensure that the binary and ast-derived
types have a consistent objectpath, to prevent the bug above from occurring
silently (and causing much confusion). This also requires a trick in
order to ensure that serialized facts are consumable downstream. This can
be removed with https://go-review.googlesource.com/c/tools/+/331789 merged.
* A minor refactoring to isolation the objdump settings in its own package.
This was originally used to implement the sanity check above, but this
information is now being passed another way. The minor refactor is preserved
however, since it cleans up the code slightly and is minimal risk.
PiperOrigin-RevId: 382613300
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Update/remove most syserror errors to linuxerr equivalents. For list
of removed errors, see //pkg/syserror/syserror.go.
PiperOrigin-RevId: 382574582
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PiperOrigin-RevId: 382194711
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PiperOrigin-RevId: 381964660
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PiperOrigin-RevId: 381561785
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Add Equals method to compare syserror and unix.Errno errors to linuxerr errors.
This will facilitate removal of syserror definitions in a followup, and
finding needed conversions from unix.Errno to linuxerr.
PiperOrigin-RevId: 380909667
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The typical sequence of calls to start a container looks like this
ct, err := container.New(conf, containerArgs)
defer ct.Destroy()
ct.Start(conf)
ws, err := ct.Wait()
For the root container, ct.Destroy() kills the sandbox process. This
doesn't look like a right wait to stop it. For example, all ongoing rpc
calls are aborted in this case. If everything is going alright, we can
just wait and it will exit itself.
Reported-by: syzbot+084fca334720887441e7@syzkaller.appspotmail.com
Signed-off-by: Andrei Vagin <avagin@gmail.com>
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...and pass it explicitly.
This reverts commit b63e61828d0652ad1769db342c17a3529d2d24ed.
PiperOrigin-RevId: 380039167
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PiperOrigin-RevId: 378726430
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PiperOrigin-RevId: 378712518
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Fixes #214
PiperOrigin-RevId: 378680466
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PiperOrigin-RevId: 378677167
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It defaults to true and setting it to false can cause filesytem corruption.
PiperOrigin-RevId: 378518663
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HostFileMapper.RegenerateMappings calls mmap with
MAP_SHARED|MAP_FIXED and these were not allowed.
Closes #6116
PiperOrigin-RevId: 377428463
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Avoids a race condition at kernel initialization.
Updates #6057.
PiperOrigin-RevId: 377357723
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PiperOrigin-RevId: 376747671
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...except in tests.
Note this replaces some uses of a cryptographic RNG with a plain RNG.
PiperOrigin-RevId: 376070666
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PiperOrigin-RevId: 375843579
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Remove useless conversions. Avoid unhandled errors.
PiperOrigin-RevId: 375834275
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PiperOrigin-RevId: 374981100
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O_PATH is now implemented in vfs2.
Fixes #2782.
PiperOrigin-RevId: 373861410
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PiperOrigin-RevId: 373661350
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cgroup controllers can be grouped together (e.g. cpu,cpuacct) and
that was confusing Cgroup.Install() into thinking that a cgroup
directory was created by the caller, when it had being created by
another controller that is grouped together.
PiperOrigin-RevId: 373661336
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We need to make sure that all children are closed before
return. But the last child saved in parent isn't closed
after we successfully iterate all the files in "names".
This patch fixes this issue.
Fixes #5982
Signed-off-by: Tiwei Bie <tiwei.btw@antgroup.com>
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PiperOrigin-RevId: 372993341
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PiperOrigin-RevId: 372608247
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This patch is to solve problem that vCPU timer mess up when
adding vCPU dynamically on ARM64, for detailed information
please refer to:
https://github.com/google/gvisor/issues/5739
There is no influence on x86 and here are main changes for
ARM64:
1. create maxVCPUs number of vCPU in machine initialization
2. we want to sync gvisor vCPU number with host CPU number,
so use smaller number between runtime.NumCPU and
KVM_CAP_MAX_VCPUS to be maxVCPUS
3. put unused vCPUs into architecture-specific map initialvCPUs
4. When machine need to bind a new vCPU with tid, rather
than creating new one, it would pick a vCPU from map initalvCPUs
5. change the setSystemTime function. When vCPU number increasing,
the time cost for function setTSC(use syscall to set cntvoff) is
liner growth from around 300 ns to 100000 ns, and this leads to
the function setSystemTimeLegacy can not get correct offset
value.
6. initializing StdioFDs and goferFD before a platform to avoid
StdioFDs confects with vCPU fds
Signed-off-by: howard zhang <howard.zhang@arm.com>
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When loading cgroups for another process, `/proc/self` was used in
a few places, causing the end state to be a mix of the process
and self. This is now fixes to always use the proper `/proc/[pid]`
path.
Added net_prio and net_cls to the list of optional controllers. This
is to allow runsc to execute then these cgroups are disabled as long
as there are no net_prio and net_cls limits that need to be applied.
Deflake TestMultiContainerEvent.
Closes #5875
Closes #5887
PiperOrigin-RevId: 372242687
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PiperOrigin-RevId: 372020696
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According to the OCI spec Mount.Type is an optional field and it
defaults to "bind" when any of "bind" or "rbind" is included in
Mount.Options.
Also fix the shim to remove bind/rbind from options when mount is
converted from bind to tmpfs inside the Sentry.
Fixes #2330
Fixes #3274
PiperOrigin-RevId: 371996891
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PiperOrigin-RevId: 371015541
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Weirdness metric contains fields to track the number of clock fallback,
partial result and vsyscalls. This metric will avoid the overhead of
having three different metrics (fallbackMetric, partialResultMetric,
vsyscallCount).
PiperOrigin-RevId: 369970218
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PiperOrigin-RevId: 369686285
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PiperOrigin-RevId: 369505182
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In the previous spot, there was a roughly 50% chance that leak checking would
actually run. Move it to the waitContainer() call on the root container, where
it is guaranteed to run before the sandbox process is terminated. Add it to
runsc/cli/main.go as well for good measure, in case the sandbox exit path does
not involve waitContainer().
PiperOrigin-RevId: 369329796
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While using remote-validation, the vast majority of time spent during
FS operations is re-walking the path to check for modifications and
then closing the file given that in most cases it has not been
modified externally.
This change introduces a new 9P message called MultiGetAttr which bulks
query attributes of several files in one shot. The returned attributes are
then used to update cached dentries before they are walked. File attributes
are updated for files that still exist. Dentries that have been deleted are
removed from the cache. And negative cache entries are removed if a new
file/directory was created externally. Similarly, synthetic dentries are
replaced if a file/directory is created externally.
The bulk update needs to be carefull not to follow symlinks, cross mount
points, because the gofer doesn't know how to resolve symlinks and where
mounts points are located. It also doesn't walk to the parent ("..") to
avoid deadlocks.
Here are the results:
Workload VFS1 VFS2 Change
bazel action 115s 70s 28.8s
Stat/100 11,043us 7,623us 974us
Updates #1638
PiperOrigin-RevId: 369325957
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Add a coverage-report flag that will cause the sandbox to generate a coverage
report (with suffix .cov) in the debug log directory upon exiting. For the
report to be generated, runsc must have been built with the following Bazel
flags: `--collect_code_coverage --instrumentation_filter=...`.
With coverage reports, we should be able to aggregate results across all tests
to surface code coverage statistics for the project as a whole.
The report is simply a text file with each line representing a covered block
as `file:start_line.start_col,end_line.end_col`. Note that this is similar to
the format of coverage reports generated with `go test -coverprofile`,
although we omit the count and number of statements, which are not useful for
us.
Some simple ways of getting coverage reports:
bazel test <some_test> --collect_code_coverage \
--instrumentation_filter=//pkg/...
bazel build //runsc --collect_code_coverage \
--instrumentation_filter=//pkg/...
runsc -coverage-report=dir/ <other_flags> do ...
PiperOrigin-RevId: 368952911
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PiperOrigin-RevId: 368919504
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PiperOrigin-RevId: 367446222
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PiperOrigin-RevId: 367328273
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Allow user mounting a verity fs on an existing mount by specifying mount
flags root_hash and lower_path.
PiperOrigin-RevId: 366843846
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This is needed to enable Xattrs features required by verity.
PiperOrigin-RevId: 366843640
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A skeleton implementation of cgroupfs. It supports trivial cpu and
memory controllers with no support for hierarchies.
PiperOrigin-RevId: 366561126
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Implement a new runsc command to set up a sandbox with verityfs and
run the measure tool. This is loosely forked from the do command, and
currently requires the caller to provide the measure tool binary.
PiperOrigin-RevId: 366553769
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As MDS side channel attack does not affect ARM64, we disable
mitigate on ARM64 in case misusage.
For more detail, please refer to:
https://access.redhat.com/security/vulnerabilities/mds
Signed-off-by: Howard Zhang <howard.zhang@arm.com>
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