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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
2021-01-12Fix simple mistakes identified by goreportcard.Adin Scannell
These are primarily simplification and lint mistakes. However, minor fixes are also included and tests added where appropriate. PiperOrigin-RevId: 351425971
2021-01-12Merge release-20201216.0-85-ge06c2b126 (automated)gVisor bot
2021-01-11Merge release-20201216.0-82-g4c4de6644 (automated)gVisor bot
2020-12-31Merge release-20201208.0-102-g807a080d9 (automated)gVisor bot
2020-12-31Add missing error checks for FileDescription.Init.Dean Deng
Syzkaller discovered this bug in pipefs by doing something quite strange: creat(&(0x7f0000002a00)='./file1\x00', 0x0) mount(&(0x7f0000000440)=ANY=[], &(0x7f00000002c0)='./file1\x00', &(0x7f0000000300)='devtmpfs\x00', 0x20000d, 0x0) creat(&(0x7f0000000000)='./file1/file0\x00', 0x0) This can be reproduced with: touch mymount mkfifo /dev/mypipe mount -o ro -t devtmpfs devtmpfs mymount echo 123 > mymount/mypipe PiperOrigin-RevId: 349687714
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