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2021-04-27Merge release-20210419.0-33-g5b207fe78 (automated)gVisor bot
2021-04-26Remove metrics: fallback, vsyscallCount and partialResultNayana Bidari
The newly added Weirdness metric with fields should be used instead of them. Simple query for weirdness metric: http://shortn/_DGNk0z2Up6 PiperOrigin-RevId: 370578132
2021-04-22Merge release-20210419.0-21-g0a6eaed50 (automated)gVisor bot
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
2021-04-17Merge release-20210408.0-46-g0c3e8daf5 (automated)gVisor bot
2021-04-14Merge release-20210408.0-30-g5c1052b6b (automated)gVisor bot
2021-04-12Merge release-20210408.0-23-gf4f6ce337 (automated)gVisor bot
2021-04-12Don't grab TaskSet mu recursively when reading task state.Rahat Mahmood
Reported-by: syzbot+a6ef0f95a2c9e7da26f3@syzkaller.appspotmail.com Reported-by: syzbot+2eaf8a9f115edec468fe@syzkaller.appspotmail.com PiperOrigin-RevId: 368093861
2021-04-03Merge release-20210322.0-38-g932c8abd0 (automated)gVisor bot
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
2021-03-29Merge release-20210322.0-29-g8a2f7e716 (automated)gVisor bot
2021-03-29[syserror] Split usermem packageZach Koopmans
Split usermem package to help remove syserror dependency in go_marshal. New hostarch package contains code not dependent on syserror. PiperOrigin-RevId: 365651233
2021-03-25Merge release-20210315.0-27-g79bc446fa (automated)gVisor bot
2021-03-25Lock TaskSet mutex for writing in ptraceClone().Jamie Liu
This is necessary since ptraceClone() mutates tracer.ptraceTracees. PiperOrigin-RevId: 365152396
2021-03-24Merge release-20210315.0-23-ge7ca2a51a (automated)gVisor bot
2021-03-24Add POLLRDNORM/POLLWRNORM support.Bhasker Hariharan
On Linux these are meant to be equivalent to POLLIN/POLLOUT. Rather than hack these on in sys_poll etc it felt cleaner to just cleanup the call sites to notify for both events. This is what linux does as well. Fixes #5544 PiperOrigin-RevId: 364859977
2021-03-24Merge release-20210315.0-18-g56a9a1397 (automated)gVisor bot
2021-03-23Move the code that manages floating-point state to a separate packageAndrei Vagin
This change is inspired by Adin's cl/355256448. PiperOrigin-RevId: 364695931
2021-03-23Merge release-20210315.0-15-gacb4c6288 (automated)gVisor bot
2021-03-22Merge release-20210315.0-6-g6bd2c6ce7 (automated)gVisor bot
2021-03-03Merge release-20210301.0-5-ga9441aea2 (automated)gVisor bot
2021-03-03[op] Replace syscall package usage with golang.org/x/sys/unix in pkg/.Ayush Ranjan
The syscall package has been deprecated in favor of golang.org/x/sys. Note that syscall is still used in the following places: - pkg/sentry/socket/hostinet/stack.go: some netlink related functionalities are not yet available in golang.org/x/sys. - syscall.Stat_t is still used in some places because os.FileInfo.Sys() still returns it and not unix.Stat_t. Updates #214 PiperOrigin-RevId: 360701387
2021-02-25Merge release-20210208.0-96-ge50ee2620 (automated)gVisor bot
2021-02-25Implement SEM_STAT_ANY cmd of semctl.Jing Chen
PiperOrigin-RevId: 359591577
2021-02-24Merge release-20210208.0-85-gacd516cfe (automated)gVisor bot
2021-02-24Add YAMA security module restrictions on ptrace(2).Dean Deng
Restrict ptrace(2) according to the default configurations of the YAMA security module (mode 1), which is a common default among various Linux distributions. The new access checks only permit the tracer to proceed if one of the following conditions is met: a) The tracer is already attached to the tracee. b) The target is a descendant of the tracer. c) The target has explicitly given permission to the tracer through the PR_SET_PTRACER prctl. d) The tracer has CAP_SYS_PTRACE. See security/yama/yama_lsm.c for more details. Note that these checks are added to CanTrace, which is checked for PTRACE_ATTACH as well as some other operations, e.g., checking a process' memory layout through /proc/[pid]/mem. Since this patch adds restrictions to ptrace, it may break compatibility for applications run by non-root users that, for instance, rely on being able to trace processes that are not descended from the tracer (e.g., `gdb -p`). YAMA restrictions can be turned off by setting /proc/sys/kernel/yama/ptrace_scope to 0, or exceptions can be made on a per-process basis with the PR_SET_PTRACER prctl. Reported-by: syzbot+622822d8bca08c99e8c8@syzkaller.appspotmail.com PiperOrigin-RevId: 359237723
2021-02-20Merge release-20210208.0-78-g93fc09248 (automated)gVisor bot
2021-02-19Don't hold baseEndpoint.mu while calling EventUpdate().Nicolas Lacasse
This removes a three-lock deadlock between fdnotifier.notifier.mu, epoll.EventPoll.listsMu, and baseEndpoint.mu. A lock order comment was added to epoll/epoll.go. Also fix unsafe access of baseEndpoint.connected/receiver. PiperOrigin-RevId: 358515191
2021-02-11Merge release-20210201.0-86-gae8d966f5 (automated)gVisor bot
2021-02-11Assign controlling terminal when tty is opened and support NOCTTYKevin Krakauer
PiperOrigin-RevId: 357015186
2021-02-09Merge release-20210201.0-64-gfe4f47896 (automated)gVisor bot
2021-02-09kernel: reparentLocked has to update children maps of old and new parentsAndrei Vagin
Reported-by: syzbot+9ffc71246fe72c73fc25@syzkaller.appspotmail.com PiperOrigin-RevId: 356536113
2021-02-09Merge release-20210201.0-63-gd6dbe6e5c (automated)gVisor bot
2021-02-09pipe: writeLocked has to return ErrWouldBlock if the pipe is fullAndrei Vagin
PiperOrigin-RevId: 356450303
2021-02-02Merge release-20210125.0-66-gfb422db70 (automated)gVisor bot
2021-02-02Merge release-20210125.0-65-gff8b308a3 (automated)gVisor bot
2021-02-02Remove call to Notify from pipe.VFSPipeFD.CopyOutFrom.Jamie Liu
This was missed in cl/351911375; pipe.VFSPipeFD.SpliceFromNonPipe already calls Notify. PiperOrigin-RevId: 355246655
2021-01-26Merge release-20210112.0-96-gce39f8298 (automated)gVisor bot
2021-01-26Implement error on pointersTamir Duberstein
This improves type-assertion safety. PiperOrigin-RevId: 353931228
2021-01-26Merge release-20210112.0-89-g394607540 (automated)gVisor bot
2021-01-26Do not generate extraneous IN_CLOSE inotify events.Dean Deng
IN_CLOSE should only be generated when a file description loses its last reference; not when a file descriptor is closed. See fs/file_table.c:__fput. Updates #5348. PiperOrigin-RevId: 353810697
2021-01-22Merge release-20210112.0-75-gf52f0101b (automated)gVisor bot
2021-01-22Implement F_GETLK fcntl.Dean Deng
Fixes #5113. PiperOrigin-RevId: 353313374
2021-01-22Merge release-20210112.0-74-g6c0e1d9cf (automated)gVisor bot
2021-01-22Define tcpip.Payloader in terms of io.ReaderTamir Duberstein
Fixes #1509. PiperOrigin-RevId: 353295589
2021-01-21Merge release-20210112.0-51-g55332aca9 (automated)gVisor bot
2021-01-20Move Lock/UnlockPOSIX into LockFD util.Dean Deng
PiperOrigin-RevId: 352904728
2021-01-15Merge release-20210112.0-25-ge57ebcd37 (automated)gVisor bot
2021-01-14Simplify the pipe implementation.Jamie Liu
- Remove the pipe package's dependence on the buffer package, which becomes unused as a result. The buffer package is currently intended to serve two use cases, pipes and temporary buffers, and does neither optimally as a result; this change facilitates retooling the buffer package to better serve the latter. - Pass callbacks taking safemem.BlockSeq to the internal pipe I/O methods, which makes most callbacks trivial. - Fix VFS1's splice() and tee() to immediately return if a pipe returns a partial write. PiperOrigin-RevId: 351911375
2021-01-12Merge release-20201216.0-87-g4e03e8754 (automated)gVisor bot
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