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2019-10-29Update symlink traversal limit when resolving interpreter path.Dean Deng
When execveat is called on an interpreter script, the symlink count for resolving the script path should be separate from the count for resolving the the corresponding interpreter. An ELOOP error should not occur if we do not hit the symlink limit along any individual path, even if the total number of symlinks encountered exceeds the limit. Closes #574 PiperOrigin-RevId: 277358474
2019-10-29Fix PollWithFullBufferBlocks.Bhasker Hariharan
Set the snd/rcv buffer sizes so that the test is deterministic and runs in a reasonable amount of time. It also ensures that we disable any auto-tuning of the send/receive buffer which may happen. PiperOrigin-RevId: 277337232
2019-10-29Disallow execveat on interpreter scripts with fd opened with O_CLOEXEC.Dean Deng
When an interpreter script is opened with O_CLOEXEC and the resulting fd is passed into execveat, an ENOENT error should occur (the script would otherwise be inaccessible to the interpreter). This matches the actual behavior of Linux's execveat. PiperOrigin-RevId: 277306680
2019-10-28Deflake TestCheckpointRestoreFabricio Voznika
PiperOrigin-RevId: 277189064
2019-10-25test/syscall: Remove duplicated gtest/gtest.h.Haibo
Signed-off-by: Haibo Xu <haibo.xu@arm.com> Change-Id: I05a7ec69b98b88931ba4a8adb3e8a7b822006001 COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/1023 from xiaobo55x:syscall_test d44a8b1f827ed4081997af96cd58ba7449e0a9e1 PiperOrigin-RevId: 276740442
2019-10-24Fix early deletion of rootDirFabricio Voznika
container.startContainers() cannot be called twice in a test (e.g. TestMultiContainerLoadSandbox) because the cleanup function deletes the rootDir, together with information from all other containers that may exist. PiperOrigin-RevId: 276591806
2019-10-24Handle AT_SYMLINK_NOFOLLOW flag for execveat.Dean Deng
PiperOrigin-RevId: 276441249
2019-10-23Handle AT_EMPTY_PATH flag in execveat.Dean Deng
PiperOrigin-RevId: 276419967
2019-10-23Add check for proper settings to AF_PACKET tests.Kevin Krakauer
As in packet_socket_raw.cc, we should check that certain proc files are set correctly. PiperOrigin-RevId: 276384534
2019-10-23Merge pull request #641 from tanjianfeng:mastergVisor bot
PiperOrigin-RevId: 276380008
2019-10-23Remove comparison between signed and unsigned intMichael Pratt
Some compilers don't like the comparison between int and size_t. Remove it. The other changes are minor style cleanups. PiperOrigin-RevId: 276333450
2019-10-21Add basic implementation of execveat syscall and associated tests.Dean Deng
Allow file descriptors of directories as well as AT_FDCWD. PiperOrigin-RevId: 275929668
2019-10-21AF_PACKET support for netstack (aka epsocket).Kevin Krakauer
Like (AF_INET, SOCK_RAW) sockets, AF_PACKET sockets require CAP_NET_RAW. With runsc, you'll need to pass `--net-raw=true` to enable them. Binding isn't supported yet. PiperOrigin-RevId: 275909366
2019-10-18Add more instructions to test/README.mdFabricio Voznika
PiperOrigin-RevId: 275565958
2019-10-18Cleanup host UDS supportMichael Pratt
This change fixes several issues with the fsgofer host UDS support. Notably, it adds support for SOCK_SEQPACKET and SOCK_DGRAM sockets [1]. It also fixes unsafe use of unet.Socket, which could cause a panic if Socket.FD is called when err != nil, and calls to Socket.FD with nothing to prevent the garbage collector from destroying and closing the socket. A set of tests is added to exercise host UDS access. This required extracting most of the syscall test runner into a library that can be used by custom tests. Updates #235 Updates #1003 [1] N.B. SOCK_DGRAM sockets are likely not particularly useful, as a server can only reply to a client that binds first. We don't allow bind, so these are unlikely to be used. PiperOrigin-RevId: 275558502
2019-10-18test/perf: optimize the getdents testAndrei Vagin
* Use mknod instead of open&close to create an empty file. * Limit a number of files to (1<<16) instead of 100K. In this case, a test set is (1, 8, 64, 512, 4K, 32K, 64K) instead of (1, 8, 64, 512, 4K, 32K, 98K). I think it is easier to compare results for 32K and 64K than 32K and 98K. And results for 98K doesn't give us more information than for 54K. PiperOrigin-RevId: 275552507
2019-10-18test: use a bigger buffer to fill a socketAndrei Vagin
Otherwise we need to do a lot of system calls and cooperative_save tests work slow. PiperOrigin-RevId: 275536957
2019-10-16Merge pull request #736 from tanjianfeng:fix-unixgVisor bot
PiperOrigin-RevId: 275114157
2019-10-16Remove death from exec test namesMichael Pratt
These aren't actually death tests in the GUnit sense. i.e., they don't call EXPECT_EXIT or EXPECT_DEATH. PiperOrigin-RevId: 275099957
2019-10-15epsocket: support /proc/net/snmpJianfeng Tan
Netstack has its own stats, we use this to fill /proc/net/snmp. Note that some metrics are not recorded in Netstack, which will be shown as 0 in the proc file. Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com> Change-Id: Ie0089184507d16f49bc0057b4b0482094417ebe1
2019-10-15support /proc/net/snmpJianfeng Tan
This proc file contains statistics according to [1]. [1] https://tools.ietf.org/html/rfc2013 Signed-off-by: Jianfeng Tan <henry.tjf@antfin.com> Change-Id: I9662132085edd8a7783d356ce4237d7ac0800d94
2019-10-14Internal change.gVisor bot
PiperOrigin-RevId: 274700093
2019-10-10Allow for zero byte iovec with MSG_PEEK | MSG_TRUNC in recvmsg.Ian Lewis
This allows for peeking at the length of the next message on a netlink socket without pulling it off the socket's buffer/queue, allowing tools like 'ip' to work. This CL also fixes an issue where dump_done_errno was not included in the NLMSG_DONE messages payload. Issue #769 PiperOrigin-RevId: 274068637
2019-10-10Fix signalfd polling.Adin Scannell
The signalfd descriptors otherwise always show as available. This can lead programs to spin, assuming they are looking to see what signals are pending. Updates #139 PiperOrigin-RevId: 274017890
2019-10-09Add blacklists for remaining runtime tests, and test that they parse correctly.Nicolas Lacasse
PiperOrigin-RevId: 273781112
2019-10-07Implement IP_TTL.Ian Gudger
Also change the default TTL to 64 to match Linux. PiperOrigin-RevId: 273430341
2019-10-07Add tests for $HOMEIan Lewis
Adds two tests. One to make sure that $HOME is set when starting a container via 'docker run' and one to make sure that $HOME is set for each container in a multi-container sandbox. Issue #701 PiperOrigin-RevId: 273395763
2019-10-03Implement proper local broadcast behaviorChris Kuiper
The behavior for sending and receiving local broadcast (255.255.255.255) traffic is as follows: Outgoing -------- * A broadcast packet sent on a socket that is bound to an interface goes out that interface * A broadcast packet sent on an unbound socket follows the route table to select the outgoing interface + if an explicit route entry exists for 255.255.255.255/32, use that one + else use the default route * Broadcast packets are looped back and delivered following the rules for incoming packets (see next). This is the same behavior as for multicast packets, except that it cannot be disabled via sockopt. Incoming -------- * Sockets wishing to receive broadcast packets must bind to either INADDR_ANY (0.0.0.0) or INADDR_BROADCAST (255.255.255.255). No other socket receives broadcast packets. * Broadcast packets are multiplexed to all sockets matching it. This is the same behavior as for multicast packets. * A socket can bind to 255.255.255.255:<port> and then receive its own broadcast packets sent to 255.255.255.255:<port> In addition, this change implicitly fixes an issue with multicast reception. If two sockets want to receive a given multicast stream and one is bound to ANY while the other is bound to the multicast address, only one of them will receive the traffic. PiperOrigin-RevId: 272792377
2019-10-03Don't report partialResult errors from sendfileAndrei Vagin
The input file descriptor is always a regular file, so sendfile can't lose any data if it will not be able to write them to the output file descriptor. Reported-by: syzbot+22d22330a35fa1c02155@syzkaller.appspotmail.com PiperOrigin-RevId: 272730357
2019-10-02Increase itimer test timeoutMichael Pratt
https://github.com/google/gvisor/commit/dd69b49ed1103bab82a6b2ac95221b89b46f3376 makes this test take longer. PiperOrigin-RevId: 272535892
2019-10-02Merge pull request #865 from tanjianfeng:fix-829gVisor bot
PiperOrigin-RevId: 272522508
2019-10-02Sanity test that open(2) on a UDS failsMichael Pratt
Spoiler alert: it doesn't. PiperOrigin-RevId: 272513529
2019-10-01Include AT_SECURE in the aux vectorMichael Pratt
gVisor does not currently implement the functionality that would result in AT_SECURE = 1, but Linux includes AT_SECURE = 0 in the normal case, so we should do the same. PiperOrigin-RevId: 272311488
2019-10-01Add blacklist support to the runtime test runner.Nicolas Lacasse
Tests in the blacklist will be explicitly skipped (with associated log line). Checks in a blacklist for the nodejs tests. PiperOrigin-RevId: 272272749
2019-10-01Support new interpreter requirements in testMichael Pratt
Refactoring in 0036d1f7eb95bcc52977f15507f00dd07018e7e2 (v4.10) caused Linux to start unconditionally zeroing the remainder of the last page in the interpreter. Previously it did not due so if filesz == memsz, and *still* does not do so when filesz == memsz for loading binaries, only interpreter. This inconsistency is not worth replicating in gVisor, as it is arguably a bug, but our tests must ensure we create interpreter ELFs compatible with this new requirement. PiperOrigin-RevId: 272266401
2019-10-01Disable cpuClockTicker when app is idleMichael Pratt
Kernel.cpuClockTicker increments kernel.cpuClock, which tasks use as a clock to track their CPU usage. This improves latency in the syscall path by avoid expensive monotonic clock calls on every syscall entry/exit. However, this timer fires every 10ms. Thus, when all tasks are idle (i.e., blocked or stopped), this forces a sentry wakeup every 10ms, when we may otherwise be able to sleep until the next app-relevant event. These wakeups cause the sentry to utilize approximately 2% CPU when the application is otherwise idle. Updates to clock are not strictly necessary when the app is idle, as there are no readers of cpuClock. This commit reduces idle CPU by disabling the timer when tasks are completely idle, and computing its effects at the next wakeup. Rather than disabling the timer as soon as the app goes idle, we wait until the next tick, which provides a window for short sleeps to sleep and wakeup without doing the (relatively) expensive work of disabling and enabling the timer. PiperOrigin-RevId: 272265822
2019-10-01Prevent CAP_NET_RAW from appearing in execFabricio Voznika
'docker exec' was getting CAP_NET_RAW even when --net-raw=false because it was not filtered out from when copying container's capabilities. PiperOrigin-RevId: 272260451
2019-10-01Honor X bit on extra anon pages in PT_LOAD segmentsMichael Pratt
Linux changed this behavior in 16e72e9b30986ee15f17fbb68189ca842c32af58 (v4.11). Previously, extra pages were always mapped RW. Now, those pages will be executable if the segment specified PF_X. They still must be writeable. PiperOrigin-RevId: 272256280
2019-09-30De-flake SetForegroundProcessGroupDifferentSession.Kevin Krakauer
PiperOrigin-RevId: 272059043
2019-09-30Only copy out remaining time on nanosleep successMichael Pratt
It looks like the old code attempted to do this, but didn't realize that err != nil even in the happy case. PiperOrigin-RevId: 272005887
2019-09-27Automated rollback of changelist 256276198Adin Scannell
PiperOrigin-RevId: 271665517
2019-09-27Merge pull request #864 from tanjianfeng:fix-861gVisor bot
PiperOrigin-RevId: 271649711
2019-09-27Implement SO_BINDTODEVICE sockoptgVisor bot
PiperOrigin-RevId: 271644926
2019-09-26Make raw socket tests pass in environments with or without CAP_NET_RAW.Kevin Krakauer
PiperOrigin-RevId: 271442321
2019-09-24test: don't use designated initializersAndrei Vagin
This change fixes compile errors: pty.cc:1460:7: error: expected primary-expression before '.' token ... PiperOrigin-RevId: 271033729
2019-09-24Stub out readahead implementation.Adin Scannell
Closes #261 PiperOrigin-RevId: 270973347
2019-09-23Run all runtime tests in a single container.Nicolas Lacasse
This makes them run much faster. Also cleaned up the log reporting. PiperOrigin-RevId: 270799808
2019-09-23Always set HOME env var with `runsc exec`.Nicolas Lacasse
We already do this for `runsc run`, but need to do the same for `runsc exec`. PiperOrigin-RevId: 270793459
2019-09-23Fix bug in RstCausesPollHUP.Bhasker Hariharan
The test is checking the wrong poll_fd for POLLHUP. The only reason it passed till now was because it was also checking for POLLIN which was always true on the other fd from the previous poll! PiperOrigin-RevId: 270780401
2019-09-23Add test that runsc exec inherits the same environment as run.Nicolas Lacasse
PiperOrigin-RevId: 270764996
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