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2019-04-03Fix index out of bounds in tty implementation.Kevin Krakauer
The previous implementation revolved around runes instead of bytes, which caused weird behavior when converting between the two. For example, peekRune would read the byte 0xff from a buffer, convert it to a rune, then return it. As rune is an alias of int32, 0xff was 0-padded to int32(255), which is the hex code point for ?. However, peekRune also returned the length of the byte (1). When calling utf8.EncodeRune, we only allocated 1 byte, but tried the write the 2-byte character ?. tl;dr: I apparently didn't understand runes when I wrote this. PiperOrigin-RevId: 241789081 Change-Id: I14c788af4d9754973137801500ef6af7ab8a8727
2019-04-02Set options on the correct Task in PTRACE_SEIZE.Jamie Liu
$ docker run --rm --runtime=runsc -it --cap-add=SYS_PTRACE debian bash -c "apt-get update && apt-get install strace && strace ls" ... Setting up strace (4.15-2) ... execve("/bin/ls", ["ls"], [/* 6 vars */]) = 0 brk(NULL) = 0x5646d8c1e000 uname({sysname="Linux", nodename="114ef93d2db3", ...}) = 0 ... PiperOrigin-RevId: 241643321 Change-Id: Ie4bce27a7fb147eef07bbae5895c6ef3f529e177
2019-04-02Add build rule for raw socket tests so they are runnable via:Kevin Krakauer
bazel test test/syscalls:raw_socket_ipv4_test_{native,runsc_ptrace,runsc_kvm} PiperOrigin-RevId: 241640049 Change-Id: Iac4dbdd7fd1827399a472059ac7d85fb6b506577
2019-04-02Add test that symlinking over a directory returns EEXIST.Nicolas Lacasse
Also remove comments in InodeOperations that required that implementation of some Create* operations ensure that the name does not already exist, since these checks are all centralized in the Dirent. PiperOrigin-RevId: 241637335 Change-Id: Id098dc6063ff7c38347af29d1369075ad1e89a58
2019-04-02Add a raw socket transport endpoint and use it for raw ICMP sockets.Kevin Krakauer
Having raw socket code together will make it easier to add support for other raw network protocols. Currently, only ICMP uses the raw endpoint. However, adding support for other protocols such as UDP shouldn't be much more difficult than adding a few switch cases. PiperOrigin-RevId: 241564875 Change-Id: I77e03adafe4ce0fd29ba2d5dfdc547d2ae8f25bf
2019-04-01Save/restore simple devices.Rahat Mahmood
We weren't saving simple devices' last allocated inode numbers, which caused inode number reuse across S/R. PiperOrigin-RevId: 241414245 Change-Id: I964289978841ef0a57d2fa48daf8eab7633c1284
2019-04-01Trim trailing newline when reading /proc/[pid]/{uid,gid}_map in test.Jamie Liu
This reveals a bug in the tests that require CAP_SET{UID,GID}: After the child process enters the new user namespace, it ceases to have the relevant capability in the parent user namespace, so the privileged write must be done by the parent process. Change tests accordingly. PiperOrigin-RevId: 241412765 Change-Id: I587c1f24aa6f2180fb2e5e5c0162691ba5bac1bc
2019-04-01Fix MemfdTest_OtherProcessCanOpenFromProcfs.Jamie Liu
- Make the body of InForkedProcess async-signal-safe. - Pass the correct path to open(). PiperOrigin-RevId: 241348774 Change-Id: I753dfa36e4fb05521e659c173e3b7db0c7fc159b
2019-03-29Return srclen in proc.idMapFileOperations.Write.Jamie Liu
PiperOrigin-RevId: 241037926 Change-Id: I4b0381ac1c7575e8b861291b068d3da22bc03850
2019-03-28set task's name when forkchris.zn
When fork a child process, the name filed of TaskContext is not set. It results in that when we cat /proc/{pid}/status, the name filed is null. Like this: Name: State: S (sleeping) Tgid: 28 Pid: 28 PPid: 26 TracerPid: 0 FDSize: 8 VmSize: 89712 kB VmRSS: 6648 kB Threads: 1 CapInh: 00000000a93d35fb CapPrm: 0000000000000000 CapEff: 0000000000000000 CapBnd: 00000000a93d35fb Seccomp: 0 Change-Id: I5d469098c37cedd19da16b7ffab2e546a28a321e PiperOrigin-RevId: 240893304
2019-03-28Setting timestamps should trigger an inotify event.Nicolas Lacasse
PiperOrigin-RevId: 240850187 Change-Id: I1458581b771a1031e47bba439e480829794927b8
2019-03-28Clean up gofer handle caching.Jamie Liu
- Document fsutil.CachedFileObject.FD() requirements on access permissions, and change gofer.inodeFileState.FD() to honor them. Fixes #147. - Combine gofer.inodeFileState.readonly and gofer.inodeFileState.readthrough, and simplify handle caching logic. - Inline gofer.cachePolicy.cacheHandles into gofer.inodeFileState.setSharedHandles, because users with access to gofer.inodeFileState don't necessarily have access to the fs.Inode (predictably, this is a save/restore problem). Before this CL: $ docker run --runtime=runsc-d -v $(pwd)/gvisor/repro:/root/repro -it ubuntu bash root@34d51017ed67:/# /root/repro/runsc-b147 mmap: 0x7f3c01e45000 Segmentation fault After this CL: $ docker run --runtime=runsc-d -v $(pwd)/gvisor/repro:/root/repro -it ubuntu bash root@d3c3cb56bbf9:/# /root/repro/runsc-b147 mmap: 0x7f78987ec000 o PiperOrigin-RevId: 240818413 Change-Id: I49e1d4a81a0cb9177832b0a9f31a10da722a896b
2019-03-27Add rsslim field in /proc/pid/stat.Nicolas Lacasse
PiperOrigin-RevId: 240681675 Change-Id: Ib214106e303669fca2d5c744ed5c18e835775161
2019-03-27Add start time to /proc/<pid>/stat.Nicolas Lacasse
The start time is the number of clock ticks between the boot time and application start time. PiperOrigin-RevId: 240619475 Change-Id: Ic8bd7a73e36627ed563988864b0c551c052492a5
2019-03-26Implement memfd_create.Rahat Mahmood
Memfds are simply anonymous tmpfs files with no associated mounts. Also implementing file seals, which Linux only implements for memfds at the moment. PiperOrigin-RevId: 240450031 Change-Id: I31de78b950101ae8d7a13d0e93fe52d98ea06f2f
2019-03-26Use toolchain configs from bazel_0.23.0Andrei Vagin
bazel 0.24.0 isn't compatible with bazel_0.20.0 configs: (10:32:27) ERROR: bazel_toolchains/configs/ubuntu16_04_clang/1.1/bazel_0.20.0/default/BUILD:57:1: no such attribute 'dynamic_runtime_libs' in 'cc_toolchain' rule PiperOrigin-RevId: 240436868 Change-Id: Iee68c9b79d907ca2bdd124386aaa77c786e089ce
2019-03-22lstat should resolve the final path component if it ends in a slash.Nicolas Lacasse
PiperOrigin-RevId: 239896221 Change-Id: I0949981fe50c57131c5631cdeb10b225648575c0
2019-03-22Implement PTRACE_SEIZE, PTRACE_INTERRUPT, and PTRACE_LISTEN.Jamie Liu
PiperOrigin-RevId: 239803092 Change-Id: I42d612ed6a889e011e8474538958c6de90c6fcab
2019-03-21Add test for short recvmsg iovec length.Ian Gudger
PiperOrigin-RevId: 239718991 Change-Id: Idc78557a8e9bfdd3cb7d8ec4db708364652640a4
2019-03-21Test TCP sockets with MSG_TRUNC|MSG_PEEK.Ian Gudger
PiperOrigin-RevId: 239714368 Change-Id: I35860b880a1d8885eb8c2d4ff267caaf72d91088
2019-03-21Clear msghdr flags on successful recvmsg.Ian Gudger
.net sets these flags to -1 and then uses their result, especting it to be zero. Does not set actual flags (e.g. MSG_TRUNC), but setting to zero is more correct than what we did before. PiperOrigin-RevId: 239657951 Change-Id: I89c5f84bc9b94a2cd8ff84e8ecfea09e01142030
2019-03-19netstack: reduce MSS from SYN to account tcp optionsAndrei Vagin
See: https://tools.ietf.org/html/rfc6691#section-2 PiperOrigin-RevId: 239305632 Change-Id: Ie8eb912a43332e6490045dc95570709c5b81855e
2019-03-18Remove references to replaced child in Rename in ramfs/agentfsMichael Pratt
In the case of a rename replacing an existing destination inode, ramfs Rename failed to first remove the replaced inode. This caused: 1. A leak of a reference to the inode (making it live indefinitely). 2. For directories, a leak of the replaced directory's .. link to the parent. This would cause the parent's link count to incorrectly increase. (2) is much simpler to test than (1), so that's what I've done. agentfs has a similar bug with link count only, so the Dirent layer informs the Inode if this is a replacing rename. Fixes #133 PiperOrigin-RevId: 239105698 Change-Id: I4450af2462d8ae3339def812287213d2cbeebde0
2019-03-18Internal changeFabricio Voznika
PiperOrigin-RevId: 239031539 Change-Id: I783127d0287a647d21de40c301c5a5c2e62b7640
2019-03-18Replace use of ucontext with ucontext_t.Kevin Krakauer
PiperOrigin-RevId: 239026571 Change-Id: Ifd01674855094f3abad497776f418023452033a1
2019-03-15Fix flaky RawPingAndSockets (and MultipleSocketsRecieve just in case).Kevin Krakauer
PiperOrigin-RevId: 238474202 Change-Id: Ib8c431e973e8cf1e1c8ee2f8c1978ddb8e88b0b8
2019-03-09Fix getsockopt(IP_MULTICAST_IF).Ian Gudger
getsockopt(IP_MULTICAST_IF) only supports struct in_addr. Also adds support for setsockopt(IP_MULTICAST_IF) with struct in_addr. PiperOrigin-RevId: 237620230 Change-Id: I75e7b5b3e08972164eb1906f43ddd67aedffc27c
2019-03-08Make IP_MULTICAST_LOOP and IP_MULTICAST_TTL allow setting int or char.Ian Gudger
This is the correct Linux behavior, and at least PHP depends on it. PiperOrigin-RevId: 237565639 Change-Id: I931af09c8ed99a842cf70d22bfe0b65e330c4137
2019-03-08Validate multicast addresses in multicast group operations.Ian Gudger
PiperOrigin-RevId: 237559843 Change-Id: I93a9d83a08cd3d49d5fc7fcad5b0710d0aa04aaa
2019-03-08Implement IP_MULTICAST_LOOP.Ian Gudger
IP_MULTICAST_LOOP controls whether or not multicast packets sent on the default route are looped back. In order to implement this switch, support for sending and looping back multicast packets on the default route had to be implemented. For now we only support IPv4 multicast. PiperOrigin-RevId: 237534603 Change-Id: I490ac7ff8e8ebef417c7eb049a919c29d156ac1c
2019-03-08Fix tests which fail in kokoroAndrei Vagin
* open_create_test_runsc_ptrace_shared doesn't expect the write access to / * exec_test_runsc_ptrace_shared could not find /usr/share/zoneinfo/ * clock_gettime_test_runsc_ptrace_shared didn't expect that a thread cpu time can be zero. * affinity_test_runsc_ptrace_shared expected minimum 3 cpus PiperOrigin-RevId: 237509429 Change-Id: I477937e5d2cdf3f8720836bfa972abd35d8220a3
2019-03-06Increase ipv4_udp_unbound_loopback size to mediumMichael Pratt
Now that tests aren't running in parallel, this test occassionally takes too long and times out. PiperOrigin-RevId: 237106971 Change-Id: I195a4b77315c9f5511c9e8ffadddb7aaa78beafd
2019-03-06Remove unsafe ScopedSigactionMichael Pratt
ScopedSigaction is not async-signal-safe, so it cannot be used after fork. Replace it with plain sigaction, which is safe. This is in a unique child anyways, so it doesn't need any cleanup. PiperOrigin-RevId: 237102411 Change-Id: I5c6ea373bbac67b9c4db204ceb1db62d338d9178
2019-03-05Priority-inheritance futex implementationFabricio Voznika
It is Implemented without the priority inheritance part given that gVisor defers scheduling decisions to Go runtime and doesn't have control over it. PiperOrigin-RevId: 236989545 Change-Id: I714c8ca0798743ecf3167b14ffeb5cd834302560
2019-03-05Add NoRandomSave to tests with correctness DisableSaveMichael Pratt
Tests using DisableSave because a portion of the test is *incompatible* with S/R clearly cannot use random S/R, as the saves may occur in the DisableSave critical section. Most such tests already have NoRandomSave. Add it to the rest. PiperOrigin-RevId: 236914708 Change-Id: Iee1cf044cfa7cb8d5aba21ddc130926218210c48
2019-03-04Make tmpfs respect MountNoATime now that fs.Handle is gone.Nicolas Lacasse
PiperOrigin-RevId: 236752802 Change-Id: I9e50600b2ae25d5f2ac632c4405a7a185bdc3c92
2019-03-04Deflake socket_ipv4_udp_unbound_loopback.Ian Gudger
When run in parallel, multicast packets can be received by the wrong test. The tests in the target are run in an isolated network namespace, but if parallelism is enabled, multiple tests from the same target will run in parallel within the target's network namespace. Disabling parallelism only allows one test to run in the network namespace at a time, which prevents interaction. PiperOrigin-RevId: 236709160 Change-Id: If828db44f0ae4002af36de6097866137c8d9da5c
2019-03-01Mark socket_ipv4_udp_unbound_loopback flakyMichael Pratt
To do so, we must add the ability to add tags to the syscall tests. PiperOrigin-RevId: 236380371 Change-Id: I76d15feb2700f20115b27aab362a88cebe8c7a6a
2019-03-01Add semctl(GETPID) syscallFabricio Voznika
Also added unimplemented notification for semctl(2) commands. PiperOrigin-RevId: 236340672 Change-Id: I0795e3bd2e6d41d7936fabb731884df426a42478
2019-02-28Fix flaky raw socket test.Kevin Krakauer
The specific issue was: - Test creates a raw ICMP socket - Test sends an ICMP echo request (aka ping request) to itself via loopback - Now two events race: - The raw socket recieves the ICMP echo request - Netstack receives the request and generates a reply (aka ping reply), which it sends back over loopback, where it is eventually received by the raw socket - The test was written to expect packets in a specific order, but they can come in any order. PiperOrigin-RevId: 236179066 Change-Id: I02c07c919d3d28093add3d18dd9196fbbc870813
2019-02-27Ping support via IPv4 raw sockets.Kevin Krakauer
Broadly, this change: * Enables sockets to be created via `socket(AF_INET, SOCK_RAW, IPPROTO_ICMP)`. * Passes the network-layer (IP) header up the stack to the transport endpoint, which can pass it up to the socket layer. This allows a raw socket to return the entire IP packet to users. * Adds functions to stack.TransportProtocol, stack.Stack, stack.transportDemuxer that enable incoming packets to be delivered to raw endpoints. New raw sockets of other protocols (not ICMP) just need to register with the stack. * Enables ping.endpoint to return IP headers when created via SOCK_RAW. PiperOrigin-RevId: 235993280 Change-Id: I60ed994f5ff18b2cbd79f063a7fdf15d093d845a
2019-02-27Don't log twice to debug log when --log isn't setFabricio Voznika
PiperOrigin-RevId: 235940853 Change-Id: I9c5b4cf18b199fb74044a5edb131bfff59dec945
2019-02-26Improve PosixErrorOr messages using gtest matchers.Brian Geffon
There was a minor bug whth IsPosixErrorOkAndHoldsMatcher where it wouldn't display the actual value contained. This fixes that and adds a few other minor improvements. PiperOrigin-RevId: 235809065 Change-Id: I487e5072e9569eb06104522963e9a1b34204daaf
2019-02-25Use a custom, world-accessible, /tmp mountMichael Pratt
This solves two problems: 1. Using the host /tmp directly meant that concurrent tests could collide attempting to use the same file, and that misbehaving tests never have their /tmp output cleaned up. 2. Host /tmp is not world-accessible on all hosts. Some tests (e.g., sticky) access files in /tmp from other users, so we need to ensure that its /tmp is world-accessible. PiperOrigin-RevId: 235637873 Change-Id: I7555224685ac5b93af88c403196b09ce1bb2bfe7
2019-02-25Handle invalid offset in sendfile(2)Fabricio Voznika
PiperOrigin-RevId: 235578698 Change-Id: I608ff5e25eac97f6e1bda058511c1f82b0e3b736
2019-02-20Implement Broadcast supportAmanda Tait
This change adds support for the SO_BROADCAST socket option in gVisor Netstack. This support includes getsockopt()/setsockopt() functionality for both UDP and TCP endpoints (the latter being a NOOP), dispatching broadcast messages up and down the stack, and route finding/creation for broadcast packets. Finally, a suite of tests have been implemented, exercising this functionality through the Linux syscall API. PiperOrigin-RevId: 234850781 Change-Id: If3e666666917d39f55083741c78314a06defb26c
2019-02-19netstack: Add SIOCGSTAMP support.Kevin Krakauer
Ping sometimes uses this instead of SO_TIMESTAMP. PiperOrigin-RevId: 234699590 Change-Id: Ibec9c34fa0d443a931557a2b1b1ecd83effe7765
2019-02-19Set rax to syscall number on SECCOMP_RET_TRAP.Jamie Liu
PiperOrigin-RevId: 234690475 Change-Id: I1cbfb5aecd4697a4a26ec8524354aa8656cc3ba1
2019-02-19Fix clone(CLONE_NEWUSER).Jamie Liu
- Use new user namespace for namespace creation checks. - Ensure userns is never nil since it's used by other namespaces. PiperOrigin-RevId: 234673175 Change-Id: I4b9d9d1e63ce4e24362089793961a996f7540cd9
2019-02-19Break /proc/[pid]/{uid,gid}_map's dependence on seqfile.Jamie Liu
In addition to simplifying the implementation, this fixes two bugs: - seqfile.NewSeqFile unconditionally creates an inode with mode 0444, but {uid,gid}_map have mode 0644. - idMapSeqFile.Write implements fs.FileOperations.Write ... but it doesn't implement any other fs.FileOperations methods and is never used as fs.FileOperations. idMapSeqFile.GetFile() => seqfile.SeqFile.GetFile() uses seqfile.seqFileOperations instead, which rejects all writes. PiperOrigin-RevId: 234638212 Change-Id: I4568f741ab07929273a009d7e468c8205a8541bc
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