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2021-06-22[syserror] Add conversions to linuxerr with temporary Equals method.Zach Koopmans
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
2021-06-17Move tcpip.Clock impl to TimekeeperTamir Duberstein
...and pass it explicitly. This reverts commit b63e61828d0652ad1769db342c17a3529d2d24ed. PiperOrigin-RevId: 380039167
2021-06-10Set RLimits during `runsc exec`Fabricio Voznika
PiperOrigin-RevId: 378726430
2021-06-10Parse mmap protection and flags in straceFabricio Voznika
PiperOrigin-RevId: 378712518
2021-06-10[op] Move SignalInfo to abi/linux package.Ayush Ranjan
Fixes #214 PiperOrigin-RevId: 378680466
2021-06-10remove the erroneous (5th) filter argument to sendmmsg.gVisor bot
PiperOrigin-RevId: 378677167
2021-06-09Remove --overlayfs-stale-read flagFabricio Voznika
It defaults to true and setting it to false can cause filesytem corruption. PiperOrigin-RevId: 378518663
2021-06-03Add additional mmap seccomp ruleFabricio Voznika
HostFileMapper.RegenerateMappings calls mmap with MAP_SHARED|MAP_FIXED and these were not allowed. Closes #6116 PiperOrigin-RevId: 377428463
2021-06-03Initialize metrics at initTamir Duberstein
Avoids a race condition at kernel initialization. Updates #6057. PiperOrigin-RevId: 377357723
2021-05-31Update comments on ambient caps to point to bugIan Lewis
PiperOrigin-RevId: 376747671
2021-05-26Use the stack RNG everywhereTamir Duberstein
...except in tests. Note this replaces some uses of a cryptographic RNG with a plain RNG. PiperOrigin-RevId: 376070666
2021-05-25Initialize Kernel.Timekeeper before network NSTamir Duberstein
PiperOrigin-RevId: 375843579
2021-05-25Use specific fmt verbs (avoid %v)Tamir Duberstein
Remove useless conversions. Avoid unhandled errors. PiperOrigin-RevId: 375834275
2021-05-20Suppress log message when there is no errorFabricio Voznika
PiperOrigin-RevId: 374981100
2021-05-14Resolve remaining O_PATH TODOs.Dean Deng
O_PATH is now implemented in vfs2. Fixes #2782. PiperOrigin-RevId: 373861410
2021-05-13Merge pull request #5983 from btw616:fix/issue-5982gVisor bot
PiperOrigin-RevId: 373661350
2021-05-13Fix problem with grouped cgroupsFabricio Voznika
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
2021-05-13Fix file descriptor leak in MultiGetAttrTiwei Bie
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>
2021-05-10Merge pull request #5764 from zhlhahaha:2126-2gVisor bot
PiperOrigin-RevId: 372993341
2021-05-07Merge pull request #5758 from zhlhahaha:2125gVisor bot
PiperOrigin-RevId: 372608247
2021-05-07Init all vCPU when initializing machine on ARM64howard zhang
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>
2021-05-05Fixes to runsc cgroupsFabricio Voznika
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
2021-05-04Remove uses of the binary package from the rest of the sentry.Rahat Mahmood
PiperOrigin-RevId: 372020696
2021-05-04Make Mount.Type optional for bind mountsFabricio Voznika
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
2021-04-28Automated rollback of changelist 369686285Fabricio Voznika
PiperOrigin-RevId: 371015541
2021-04-22Add weirdness sentry metric.Nayana Bidari
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
2021-04-21Automated rollback of changelist 369325957Michael Pratt
PiperOrigin-RevId: 369686285
2021-04-20Clean test tags.Adin Scannell
PiperOrigin-RevId: 369505182
2021-04-19Move runsc reference leak checking to better locations.Dean Deng
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
2021-04-19Add MultiGetAttr message to 9PFabricio Voznika
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
2021-04-16Allow runsc to generate coverage reports.Dean Deng
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
2021-04-16Internal changeZach Koopmans
PiperOrigin-RevId: 368919504
2021-04-08Clarify platform errors.Adin Scannell
PiperOrigin-RevId: 367446222
2021-04-07Add internal staging tags to //runsc and //shim binaries.Adin Scannell
PiperOrigin-RevId: 367328273
2021-04-05Allow user mount for verity fsChong Cai
Allow user mounting a verity fs on an existing mount by specifying mount flags root_hash and lower_path. PiperOrigin-RevId: 366843846
2021-04-05Set Verity bit in verity_prepare cmdChong Cai
This is needed to enable Xattrs features required by verity. PiperOrigin-RevId: 366843640
2021-04-02Implement cgroupfs.Rahat Mahmood
A skeleton implementation of cgroupfs. It supports trivial cpu and memory controllers with no support for hierarchies. PiperOrigin-RevId: 366561126
2021-04-02Implement the runsc verity-prepare command.Rahat Mahmood
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
2021-04-01Disable mitigate and related test on ARM64Howard Zhang
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>
2021-03-30Fix panic when overriding /dev files with VFS2Fabricio Voznika
VFS1 skips over mounts that overrides files in /dev because the list of files is hardcoded. This is not needed for VFS2 and a recent change lifted this restriction. However, parts of the code were still skipping /dev mounts even in VFS2, causing the loader to panic when it ran short of FDs to connect to the gofer. PiperOrigin-RevId: 365858436
2021-03-23Add --file-access-mounts flagFabricio Voznika
--file-access-mounts flag is similar to --file-access, but controls non-root mounts that were previously mounted in shared mode only. This gives more flexibility to control how mounts are shared within a container. PiperOrigin-RevId: 364669882
2021-03-23setgid directory support in goferfsKevin Krakauer
Also adds support for clearing the setuid bit when appropriate (writing, truncating, changing size, changing UID, or changing GID). VFS2 only. PiperOrigin-RevId: 364661835
2021-03-23Allow FSETXATTR/FGETXATTR host calls for VerityChong Cai
These host calls are needed for Verity fs to generate/verify hashes. PiperOrigin-RevId: 364598180
2021-03-18Skip /dev submount hack on VFS2.Jamie Liu
containerd usually configures both /dev and /dev/shm as tmpfs mounts, e.g.: ``` "mounts": [ ... { "destination": "/dev", "type": "tmpfs", "source": "/run/containerd/io.containerd.runtime.v2.task/moby/10eedbd6a0e7937ddfcab90f2c25bd9a9968b734c4ae361318142165d445e67e/tmpfs", "options": [ "nosuid", "strictatime", "mode=755", "size=65536k" ] }, ... { "destination": "/dev/shm", "type": "tmpfs", "source": "/run/containerd/io.containerd.runtime.v2.task/moby/10eedbd6a0e7937ddfcab90f2c25bd9a9968b734c4ae361318142165d445e67e/shm", "options": [ "nosuid", "noexec", "nodev", "mode=1777", "size=67108864" ] }, ... ``` (This is mostly consistent with how Linux is usually configured, except that /dev is conventionally devtmpfs, not regular tmpfs. runc/libcontainer implements OCI-runtime-spec-undocumented behavior to create /dev/{ptmx,fd,stdin,stdout,stderr} in non-bind /dev mounts. runsc silently switches /dev to devtmpfs. In VFS1, this is necessary to get device files like /dev/null at all, since VFS1 doesn't support real device special files, only what is hardcoded in devfs. VFS2 does support device special files, but using devtmpfs is the easiest way to get pre-created files in /dev.) runsc ignores many /dev submounts in the spec, including /dev/shm. In VFS1, this appears to be to avoid introducing a submount overlay for /dev, and is mostly fine since the typical mode for the /dev/shm mount is ~consistent with the mode of the /dev/shm directory provided by devfs (modulo the sticky bit). In VFS2, this is vestigial (VFS2 does not use submount overlays), and devtmpfs' /dev/shm mode is correct for the mount point but not the mount. So turn off this behavior for VFS2. After this change: ``` $ docker run --rm -it ubuntu:focal ls -lah /dev/shm total 0 drwxrwxrwt 2 root root 40 Mar 18 00:16 . drwxr-xr-x 5 root root 360 Mar 18 00:16 .. $ docker run --runtime=runsc --rm -it ubuntu:focal ls -lah /dev/shm total 0 drwxrwxrwx 1 root root 0 Mar 18 00:16 . dr-xr-xr-x 1 root root 0 Mar 18 00:16 .. $ docker run --runtime=runsc-vfs2 --rm -it ubuntu:focal ls -lah /dev/shm total 0 drwxrwxrwt 2 root root 40 Mar 18 00:16 . drwxr-xr-x 5 root root 320 Mar 18 00:16 .. ``` Fixes #5687 PiperOrigin-RevId: 363699385
2021-03-11Report filesystem-specific mount options.Rahat Mahmood
PiperOrigin-RevId: 362406813
2021-03-11Major refactor of runsc mitigate.Zach Koopmans
PiperOrigin-RevId: 362360425
2021-03-09Update flock to v0.8.0Fabricio Voznika
PiperOrigin-RevId: 361962416
2021-03-09Fix invalid interface conversion in runnerFabricio Voznika
panic: interface conversion: interface {} is syscall.WaitStatus, not unix.WaitStatus goroutine 1 [running]: main.runTestCaseNative(0xc0001fc000, 0xe3, 0xc000119b60, 0x1, 0x1, 0x0, 0x0) test/runner/runner.go:185 +0xa94 main.main() test/runner/runner.go:118 +0x745 PiperOrigin-RevId: 361957796
2021-03-08Internal change.Chong Cai
PiperOrigin-RevId: 361689477
2021-03-06[op] Replace syscall package usage with golang.org/x/sys/unix in runsc/.Ayush Ranjan
The syscall package has been deprecated in favor of golang.org/x/sys. Note that syscall is still used in some places because the following don't seem to have an equivalent in unix package: - syscall.SysProcIDMap - syscall.Credential Updates #214 PiperOrigin-RevId: 361381490
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