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2021-05-14Fix cgroup hierarchy registration.Rahat Mahmood
Previously, registration was racy because we were publishing hierarchies in the registry without fully initializing the underlying filesystem. This led to concurrent mount(2)s discovering the partially intialized filesystems and dropping the final refs on them which cause them to be freed prematurely. Reported-by: syzbot+13f54e77bdf59f0171f0@syzkaller.appspotmail.com Reported-by: syzbot+2c7f0a9127ac6a84f17e@syzkaller.appspotmail.com PiperOrigin-RevId: 373824552
2021-05-13Apply SWS avoidance to ACKs with window updatesMithun Iyer
When recovering from a zero-receive-window situation, and asked to send out an ACK, ensure that we apply SWS avoidance in our window updates. Fixes #5984 PiperOrigin-RevId: 373689578
2021-05-06Implement /proc/cmdlineSteve Silva
This change implements /proc/cmdline with a basic faux command line "BOOT_IMAGE=/vmlinuz-[version]-gvisor quiet" so apps that may expect it do not receive errors. Also tests for the existence of /proc/cmdline as part of the system call test suite PiperOrigin-RevId: 372462070
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
2021-05-05Automated rollback of changelist 361661726Andrei Vagin
PiperOrigin-RevId: 372221411
2021-05-05Fix a race in reading last seen ICMP error during handshakeMithun Iyer
On receiving an ICMP error during handshake, the error is propagated by reading `endpoint.lastError`. This can race with the socket layer invoking getsockopt() with SO_ERROR where the same value is read and cleared, causing the handshake to bail out with a non-error state. Fix the race by checking for lastError state and failing the handshake with ErrConnectionAborted if the lastError was read and cleared by say SO_ERROR. The race mentioned in the bug, is caught only with the newly added tcp_test unit test, where we have control over stopping/resuming protocol loop. Adding a packetimpact test as well for sanity testing of ICMP error handling during handshake. Fixes #5922 PiperOrigin-RevId: 372135662
2021-05-04tcp_socket_test: replace tcp_wmem with SO_SNDBUFKevin Krakauer
PiperOrigin-RevId: 372022596
2021-05-04Increase error margin for memory accounting test.Dean Deng
PiperOrigin-RevId: 371963265
2021-05-03Temporarily disable atime/mtime check in utimensat test.Dean Deng
PiperOrigin-RevId: 371776583
2021-05-03Fix deadlock in /proc/[pid]/fd/[num]Fabricio Voznika
In order to resolve path names, fsSymlink.Readlink() may need to reenter kernfs. Change the code so that kernfs.Inode.Readlink() is called without locks and document the new contract. PiperOrigin-RevId: 371770222
2021-04-30Fix //test/syscalls:tcp_socket_test_nativeKevin Krakauer
The data written was larger than the write buffer, and nobody was reading the other end. PiperOrigin-RevId: 371436084
2021-04-29Fix up TODOs in the codeFabricio Voznika
PiperOrigin-RevId: 371231148
2021-04-29Implement epoll_pwait2.Jing Chen
PiperOrigin-RevId: 371216407
2021-04-28Remove side effect from test casesFabricio Voznika
Restore capabilities for tests that need to change them. PiperOrigin-RevId: 371007047
2021-04-28Disable test that is always skippedFabricio Voznika
PiperOrigin-RevId: 370989166
2021-04-26Merge pull request #5898 from zhlhahaha:2126-1gVisor bot
PiperOrigin-RevId: 370569000
2021-04-26Handle tmpfs with 5 fields in /proc/mounts parsing.Adin Scannell
PiperOrigin-RevId: 370565903
2021-04-26fix brace misplaced errorHoward Zhang
Signed-off-by: Howard Zhang <howard.zhang@arm.com>
2021-04-24Add verity tests for stat, deleted/renamed fileChong Cai
PiperOrigin-RevId: 370219558
2021-04-23hostinet: parse the timeval structure from a SO_TIMESTAMP control messageAndrei Vagin
PiperOrigin-RevId: 370181621
2021-04-22Remove side effect from mount testsFabricio Voznika
Dropping CAP_SYS_ADMIN and not restoring it causes other tests to be skipped. PiperOrigin-RevId: 370002644
2021-04-22Add mlock syscall testFabricio Voznika
PiperOrigin-RevId: 369993733
2021-04-22Fix AF_UNIX listen() w/ zero backlog.Bhasker Hariharan
In https://github.com/google/gvisor/commit/f075522849fa a check to increase zero to a minimum backlog length was removed from sys_socket.go to bring it in parity with linux and then in tcp/endpoint.go we bump backlog by 1. But this broke calling listen on a AF_UNIX socket w/ a zero backlog as in linux it does allow 1 connection even with a zero backlog. This was caught by a php runtime test socket_abstract_path.phpt. PiperOrigin-RevId: 369974744
2021-04-22Also report mount options through /proc/<pid>/mounts.Rahat Mahmood
PiperOrigin-RevId: 369967629
2021-04-22Add verity tests for modified file/Merkle fileChong Cai
PiperOrigin-RevId: 369909691
2021-04-21Stub the custom "job" controller required by some workloads.Rahat Mahmood
PiperOrigin-RevId: 369724358
2021-04-20Clean test tags.Adin Scannell
PiperOrigin-RevId: 369505182
2021-04-20Speed up O_APPEND with remote revalidatingFabricio Voznika
Remote revalidating requires to update file size on every write on a file opened with O_APPEND. If host FD exists, it can be used to update the size and skip round trip to the gofer. With this change, O_APPEND writes with remote revalidating is almost as fast as exclusive mode: BM_Append VFS1 60.7us VFS2 56.8us VFS2 exclusive 14.2us This change 15.8us Updates #1792 PiperOrigin-RevId: 369486801
2021-04-20Move SO_RCVBUF to socketops.Nayana Bidari
Fixes #2926, #674 PiperOrigin-RevId: 369457123
2021-04-17Avoid ignoring incoming packet by demuxer on endpoint lookup failureMithun Iyer
This fixes a race that occurs while the endpoint is being unregistered and the transport demuxer attempts to match the incoming packet to any endpoint. The race specifically occurs when the unregistration (and deletion of the endpoint) occurs, after a successful endpointsByNIC lookup and before the endpoints map is further looked up with ingress NICID of the packet. The fix is to notify the caller of lookup-with-NICID failure, so that the logic falls through to handling unknown destination packets. For TCP this can mean replying back with RST. The syscall test in this CL catches this race as the ACK completing the handshake could get silently dropped on a listener close, causing no RST sent to the peer and timing out the poll waiting for POLLHUP. Fixes #5850 PiperOrigin-RevId: 369023779
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
2021-04-16Include logs for packetimpact tests that are expected to failZeling Feng
PiperOrigin-RevId: 368938936
2021-04-16Use size_t instead of C integer types.Dean Deng
PiperOrigin-RevId: 368919557
2021-04-15Add verity ioctl test for mount with root hashChong Cai
PiperOrigin-RevId: 368779532
2021-04-15Disable failing socket_ipv4_udp_unbound_loopback_test_linux tests.Dean Deng
PiperOrigin-RevId: 368749894
2021-04-14Make the generated test binary name match the target nameTing-Yu Wang
PiperOrigin-RevId: 368495641
2021-04-13Remove _NoRandomSave tests.Adin Scannell
We do not currently run random save tests. PiperOrigin-RevId: 368309921
2021-04-13Fix listener close, client connect raceMithun Iyer
Fix a race where the ACK completing the handshake can be dropped by a closing listener without RST to the peer. The listener close would reset the accepted queue and that causes the connecting endpoint in SYNRCVD state to drop the ACK thinking the queue if filled up. PiperOrigin-RevId: 368165509
2021-04-12Make AsSockAddr() to replace reinterpret_cast<sockaddr*>Ting-Yu Wang
It's a common pattern in test code to reinterpret_cast<sockaddr*> from sockaddr_* structs. Make AsSockAddr() for them so code looks better. Note: Why not a wrapper type for `sockaddr_storage` and etc? It's also a common need to have a local in-out variable of socklen_t. Creating a wrapper type may however lead to this wrong code: Wrapper addr; socklen_t addrlen = sizeof(addr); where sizeof(Wrapper) may not equal to sizeof(sockaddr_storage). PiperOrigin-RevId: 368126229
2021-04-09iptables: support postrouting hook and SNAT targetToshi Kikuchi
The current SNAT implementation has several limitations: - SNAT source port has to be specified. It is not optional. - SNAT source port range is not supported. - SNAT for UDP is a one-way translation. No response packets are handled (because conntrack doesn't support UDP currently). - SNAT and REDIRECT can't work on the same connection. Fixes #5489 PiperOrigin-RevId: 367750325
2021-04-09Merge pull request #5767 from avagin:mxcsrgVisor bot
PiperOrigin-RevId: 367730917
2021-04-09Move maxListenBacklog check to sentryMithun Iyer
Move maxListenBacklog check to the caller of endpoint Listen so that it is applicable to Unix domain sockets as well. This was changed in cl/366935921. Reported-by: syzbot+a35ae7cdfdde0c41cf7a@syzkaller.appspotmail.com PiperOrigin-RevId: 367728052
2021-04-07perf/getpid: add a case when syscalls are executed via mov $XXX, %eax; syscallAndrei Vagin
This is the most often pattern of calling system calls in real applications. PiperOrigin-RevId: 367320048
2021-04-05Fix listen backlog handling to be in parity with LinuxMithun Iyer
- Change the accept queue full condition for a listening endpoint to only honor completed (and delivered) connections. - Use syncookies if the number of incomplete connections is beyond listen backlog. This also cleans up the SynThreshold option code as that is no longer used with this change. - Added a new stack option to unconditionally generate syncookies. Similar to sysctl -w net.ipv4.tcp_syncookies=2 on Linux. - Enable keeping of incomplete connections beyond listen backlog. - Drop incoming SYNs only if the accept queue is filled up. - Drop incoming ACKs that complete handshakes when accept queue is full - Enable the stack to accept one more connection than programmed by listen backlog. - Handle backlog argument being zero, negative for listen, as Linux. - Add syscall and packetimpact tests to reflect the changes above. - Remove TCPConnectBacklog test which is polling for completed connections on the client side which is not reflective of whether the accept queue is filled up by the test. The modified syscall test in this CL addresses testing of connecting sockets. Fixes #3153 PiperOrigin-RevId: 366935921
2021-04-05Report task CPU usage through the cpuacct cgroup controller.Rahat Mahmood
PiperOrigin-RevId: 366923274
2021-04-05Add initial verity ioctl syscall testsChong Cai
PiperOrigin-RevId: 366907152
2021-04-05Enable Checkpoint/Restore test with VFS2Fabricio Voznika
Closes #3373 PiperOrigin-RevId: 366903991
2021-04-05Add fsstress on tmpfs to presubmitFabricio Voznika
Updates #5273 PiperOrigin-RevId: 366902314
2021-04-05Actually don't run unlink_benchmark with TSAN.Ayush Ranjan
This benchmark currently takes > 15 minutes to run in that case. PiperOrigin-RevId: 366891726
2021-04-05deflake semaphore testKevin Krakauer
There's no reason to actually increment the semaphore, it just introduces the chance of a race. PiperOrigin-RevId: 366851795
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