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2020-10-29Fix TCP wildcard bind failure when netstack is v6 onlyTing-Yu Wang
TCP endpoint unconditionly binds to v4 even when the stack only supports v6. PiperOrigin-RevId: 339739392
2020-10-29Keep magic constants out of netstackKevin Krakauer
PiperOrigin-RevId: 339721152
2020-10-29Add support for bare IPv4 in packetimpact testsArthur Sfez
PiperOrigin-RevId: 339699771
2020-10-29Delay goroutine creation during TCP handshake for accept/connect.Dean Deng
Refactor TCP handshake code so that when connect is initiated, the initial SYN is sent before creating a goroutine to handle the rest of the handshake (which blocks). Similarly, the initial SYN-ACK is sent inline when SYN is received during accept. Some additional cleanup is done as well. Eventually we would like to complete connections in the dispatcher without requiring a wakeup to complete the handshake. This refactor makes that easier. Updates #231 PiperOrigin-RevId: 339675182
2020-10-28Add url option for blog authorsIan Lewis
PiperOrigin-RevId: 339608078
2020-10-28[infra] Deflake Go / generate (pull_request) GitHub action.Ayush Ranjan
As you can see https://github.com/google/gvisor/commits/master, there are a lot of red commits. This is because the Go / generate GitHub action flakes. On merge, two variants of this workflow run: - one triggered by the pull request (copybara force pushes to the PR right before merge) - one triggered by the push (merge) If the push action ends up finishing before the pull request action can run go_branch.sh, then the changes that go_branch.sh makes is already pushed to the remote go branch. Consequently, the pull request action ends up having nothing to commit causing this action to fail. This change also fixes lint warnings. Now we skip running the go_branch.sh if we find that our current working commit has already been committed to remote. PiperOrigin-RevId: 339586760
2020-10-28Add leak checking for kernfs.Dentry.Dean Deng
Updates #1486. PiperOrigin-RevId: 339581879
2020-10-28Add logging option to leak checker.Dean Deng
Also refactor the template and CheckedObject interface to make this cleaner. Updates #1486. PiperOrigin-RevId: 339577120
2020-10-28Add the payload directly to the ICMPv4 typeArthur Sfez
This makes handling inbound fragmented packets easier, because a fragmented packet might not have an actual ICMP header but only a payload. After this change, the ICMPv4 is the last layer you can get because the payload is embedded in it. Note that this makes it consistent with the ICMPv6 implementation. While I'm here, I've also added the Ident and Sequence fields on the ICMPv4 type. Defaults are still zero. PiperOrigin-RevId: 339577094
2020-10-28Traversal embedded libraries, even for go_library rules.Adin Scannell
PiperOrigin-RevId: 339570821
2020-10-28Merge pull request #4630 from lemin9538:lemin_arm64_devgVisor bot
PiperOrigin-RevId: 339540747
2020-10-28Invalidate overlay.dentry.dirents during open() file creation.Jamie Liu
Updates #1199 PiperOrigin-RevId: 339528827
2020-10-28Avoid time.Now in NUDTamir Duberstein
Use the stack clock instead. Change NeighborEntry.UpdatedAt to UpdatedAtNanos. PiperOrigin-RevId: 339520566
2020-10-28[vfs] Refactor hostfs mmap into kernfs util.Ayush Ranjan
PiperOrigin-RevId: 339505487
2020-10-28Merge pull request #2849 from lubinszARM:pr_memory_barriergVisor bot
PiperOrigin-RevId: 339504677
2020-10-28Bump honnef.co/go/tools to v0.0.1-2020.1.6Ting-Yu Wang
PiperOrigin-RevId: 339476515
2020-10-28[runtime tests] Unexclude fixed test.Ayush Ranjan
#4641 fixed the PHP runtime test ext/standard/tests/network/bug20134.phpt. We should start testing it again. Also excluded another flaky test. Seems like a test bug. PiperOrigin-RevId: 339475716
2020-10-28Merge pull request #4543 from lubinszARM:pr_test_sigaltstackgVisor bot
PiperOrigin-RevId: 339459247
2020-10-27Merge pull request #4598 from lubinszARM:pr_kvm_precise_syncgVisor bot
PiperOrigin-RevId: 339404936
2020-10-28arm64: need to restore the sentry's TLS when in EL1Min Le
Signed-off-by: Min Le <lemin.lm@antgroup.com>
2020-10-27Merge pull request #4587 from lnsp:stacktracegVisor bot
PiperOrigin-RevId: 339385609
2020-10-27Add more cgroup unit testsFabricio Voznika
PiperOrigin-RevId: 339380431
2020-10-27Add support for Timestamp and RecordRoute IP optionsJulian Elischer
IPv4 options extend the size of the IP header and have a basic known format. The framework can process that format without needing to know about every possible option. We can add more code to handle additional option types as we need them. Bad options or mangled option entries can result in ICMP Parameter Problem packets. The first types we support are the Timestamp option and the Record Route option, included in this change. The options are processed at several points in the packet flow within the Network stack, with slightly different requirements. The framework includes a mechanism to control this at each point. Support has been added for such points which are only present in upcoming CLs such as during packet forwarding and fragmentation. With this change, 'ping -R' and 'ping -T' work against gVisor and Fuchsia. $ ping -R 192.168.1.2 PING 192.168.1.2 (192.168.1.2) 56(124) bytes of data. 64 bytes from 192.168.1.2: icmp_seq=1 ttl=64 time=0.990 ms NOP RR: 192.168.1.1 192.168.1.2 192.168.1.1 $ ping -T tsprespec 192.168.1.2 192.168.1.1 192.168.1.2 PING 192.168.1.2 (192.168.1.2) 56(124) bytes of data. 64 bytes from 192.168.1.2: icmp_seq=1 ttl=64 time=1.20 ms TS: 192.168.1.2 71486821 absolute 192.168.1.1 746 Unit tests included for generic options, Timestamp options and Record Route options. PiperOrigin-RevId: 339379076
2020-10-27Add SHA512 to merkle tree libraryChong Cai
PiperOrigin-RevId: 339377254
2020-10-27Wake up any waiters on an ICMP error on UDP socket.Bhasker Hariharan
This change wakes up any waiters when we receive an ICMP port unreachable control packet on an UDP socket as well as sets waiter.EventErr in the result returned by Readiness() when e.lastError is not nil. The latter is required where an epoll()/poll() is done after the error is already handled since we will never notify again in such cases. PiperOrigin-RevId: 339370469
2020-10-27Implement /proc/[pid]/memLennart
This PR implements /proc/[pid]/mem for `pkg/sentry/fs` (refer to #2716) and `pkg/sentry/fsimpl`. @majek COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/4060 from lnsp:proc-pid-mem 2caf9021254646f441be618a9bb5528610e44d43 PiperOrigin-RevId: 339369629
2020-10-27Merge pull request #4420 from workato:dev-optionsgVisor bot
PiperOrigin-RevId: 339363816
2020-10-27Pass NeighborEntry in NUD callbacksTamir Duberstein
...instead of passing its fields piecemeal. PiperOrigin-RevId: 339345899
2020-10-27Assign VFS2 overlay device numbers based on layer device numbers.Jamie Liu
In VFS1's overlayfs, files use the device and inode number of the lower layer inode if one exists, and the upper layer inode otherwise. The former behavior is inefficient (requiring lower layer lookups even if the file exists and is otherwise wholly determined by the upper layer), and somewhat dangerous if the lower layer is also observable (since both the overlay and lower layer file will have the same device and inode numbers and thus appear to be the same file, despite being behaviorally different). VFS2 overlayfs imitates Linux overlayfs (in its default configuration) instead; it always uses the inode number from the originating layer, but synthesizes a unique device number for directories and another device number for non-directory files that have not been copied-up. As it turns out, the latter is insufficient (in VFS2, and possibly Linux as well), because a given layer may include files with different device numbers. If two distinct files on such a layer have device number X and Y respectively, but share inode number Z, then the overlay will map both files to some private device number X' and inode number Z, potentially confusing applications. Fix this by assigning synthetic device numbers based on the lower layer's device number, rather than the lower layer's vfs.Filesystem. PiperOrigin-RevId: 339300341
2020-10-27Add basic address deletion to netlinkIan Lewis
Updates #3921 PiperOrigin-RevId: 339195417
2020-10-26Fix platforms blog post permalinkIan Lewis
PiperOrigin-RevId: 339182848
2020-10-26Update latest install docs to install containerd shimIan Lewis
PiperOrigin-RevId: 339182137
2020-10-26Implement command IPC_STAT for semctl.Jing Chen
PiperOrigin-RevId: 339166854
2020-10-26Allow overriding mount options for /dev and /dev/ptsKonstantin Baranov
This is useful to optionally set /dev ro,noexec. Treat /dev and /dev/pts the same as /proc and /sys. Make sure the Type is right though. Many config.json snippets on the Internet suggest /dev is tmpfs, not devtmpfs.
2020-10-26Add verity tests for deleted/renamed casesChong Cai
Also change verity test to use a context with an active task. This is required to delete/rename the file in the underlying file system. PiperOrigin-RevId: 339146445
2020-10-26[vfs] kernfs: Implement LRU cache for kernfs dentries.Ayush Ranjan
Much like the VFS2 gofer client, kernfs too now caches dentries. The size of the LRU cache is configurable via mount options. Have adopted the same reference semantics from gofer client dentry. Only sysfs and procfs use this LRU cache. The rest of the kernfs users (devpts, fusefs, host, pipefs, sockfs) still use the no cache approach. PiperOrigin-RevId: 339139835
2020-10-26Fix SCM Rights S/R reference leak.Dean Deng
Control messages collected when peeking into a socket were being leaked. PiperOrigin-RevId: 339114961
2020-10-26Add nogo configuration.Adin Scannell
This splits the nogo rules into a separate configuration yaml file, and allows for multiple files to be provided. Because attrs cannot be passed down to aspects, this required that all findings are propagated up the aspect Provider. This doesn't mean that any extra work must be done, just that this information must be carried through the graph, and some additional starlark complexity is required. PiperOrigin-RevId: 339076357
2020-10-26Add parser for open source benchmarks.Zach Koopmans
Add a parser binary for parsing files containing Benchmark output and sending data to BigQuery. PiperOrigin-RevId: 339066396
2020-10-24Implement Seek in verity fsChong Cai
PiperOrigin-RevId: 338847417
2020-10-24Add leak checking to vfs2 structures that cannot use the refs_vfs2 template.Dean Deng
Updates #1486. PiperOrigin-RevId: 338832085
2020-10-24Avoid excessive save/restore cycles in socket_ipv4_udp_unbound tests.Jamie Liu
PiperOrigin-RevId: 338805321
2020-10-24Send ICMP error message if IP fragment reassembly failsToshi Kikuchi
Fixes #4427, #4428 PiperOrigin-RevId: 338805047
2020-10-23Internal change.Chong Cai
PiperOrigin-RevId: 338798433
2020-10-23Direct gvisor.dev/issues to the same place as gvisor.dev/issue.Dean Deng
Also let the Github bug reviver detect both in TODOs. PiperOrigin-RevId: 338785089
2020-10-23Fix nogo tests in //pkg/sentry/socket/...Ting-Yu Wang
PiperOrigin-RevId: 338784921
2020-10-23Fix nogo errors in specutilsFabricio Voznika
PiperOrigin-RevId: 338780793
2020-10-23Support VFS2 save/restore.Jamie Liu
Inode number consistency checks are now skipped in save/restore tests for reasons described in greatest detail in StatTest.StateDoesntChangeAfterRename. They pass in VFS1 due to the bug described in new test case SimpleStatTest.DifferentFilesHaveDifferentDeviceInodeNumberPairs. Fixes #1663 PiperOrigin-RevId: 338776148
2020-10-23Fix socket_ipv4_udp_unbound_loopback_test_linuxZach Koopmans
Handle "Resource temporarily unavailable" EAGAIN errors with a select call before calling recvmsg. Also rename similar helper call from "RecvMsgTimeout" to "RecvTimeout", because it calls "recv". PiperOrigin-RevId: 338761695
2020-10-23iptables testing: handle EINTR on calls to accept().Kevin Krakauer
This caused test flakes. PiperOrigin-RevId: 338758723
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