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2020-06-26Require CAP_SYS_ADMIN in the root user namespace for TTY theftKevin Krakauer
PiperOrigin-RevId: 318563543
2020-06-26Support inotify IN_ONESHOT.Dean Deng
Also, while we're here, make sure that gofer inotify events are generated when files are created in remote revalidating mode. Updates #1479. PiperOrigin-RevId: 318536354
2020-06-25Test that the fuse device can be openedRidwan Sharif
2020-06-25Moved FUSE device under the fuse directoryRidwan Sharif
2020-06-25Add FUSE character deviceRidwan Sharif
This change adds a FUSE character device backed by devtmpfs. This device will be used to establish a connection between the FUSE server daemon and fusefs. The FileDescriptionImpl methods will be implemented as we flesh out fusefs some more. The tests assert that the device can be opened and used.
2020-06-24Fix procfs bugs in vfs2.Dean Deng
- Support writing on proc/[pid]/{uid,gid}map - Return EIO for writing to static files. Updates #2923. PiperOrigin-RevId: 318188503
2020-06-24Internal change.gVisor bot
PiperOrigin-RevId: 318180382
2020-06-23Add support for SO_REUSEADDR to TCP sockets/endpoints.Ian Gudger
For TCP sockets, SO_REUSEADDR relaxes the rules for binding addresses. gVisor/netstack already supported a behavior similar to SO_REUSEADDR, but did not allow disabling it. This change brings the SO_REUSEADDR behavior closer to the behavior implemented by Linux and adds a new SO_REUSEADDR disabled behavior. Like Linux, SO_REUSEADDR is now disabled by default. PiperOrigin-RevId: 317984380
2020-06-23Complete inotify IN_EXCL_UNLINK implementation in VFS2.Dean Deng
Events were only skipped on parent directories after their children were unlinked; events on the unlinked file itself need to be skipped as well. As a result, all Watches.Notify() calls need to know whether the dentry where the call came from was unlinked. Updates #1479. PiperOrigin-RevId: 317979476
2020-06-23Nit fix: Create and use a std::string object for `const char*`.Ting-Yu Wang
PiperOrigin-RevId: 317973144
2020-06-23Support inotify in vfs2 gofer fs.Dean Deng
Because there is no inode structure stored in the sandbox, inotify watches must be held on the dentry. This would be an issue in the presence of hard links, where multiple dentries would need to share the same set of watches, but in VFS2, we do not support the internal creation of hard links on gofer fs. As a result, we make the assumption that every dentry corresponds to a unique inode. Furthermore, dentries can be cached and then evicted, even if the underlying file has not be deleted. We must prevent this from occurring if there are any watches that would be lost. Note that if the dentry was deleted or invalidated (d.vfsd.IsDead()), we should still destroy it along with its watches. Additionally, when a dentry’s last watch is removed, we cache it if it also has zero references. This way, the dentry can eventually be evicted from memory if it is no longer needed. This is accomplished with a new dentry method, OnZeroWatches(), which is called by Inotify.RmWatch and Inotify.Release. Note that it must be called after all inotify locks are released to avoid violating lock order. Stress tests are added to make sure that inotify operations don't deadlock with gofer.OnZeroWatches. Updates #1479. PiperOrigin-RevId: 317958034
2020-06-23Deflake proc test: Don't fail on DT_UNKNOWN.Ting-Yu Wang
Per manual page: "All applications must properly handle a return of DT_UNKNOWN." PiperOrigin-RevId: 317957013
2020-06-22Check for invalid trailing / when traversing path in gofer OpenAt.Dean Deng
Updates #2923. PiperOrigin-RevId: 317700049
2020-06-22Allow readdir(/proc/[tid]/net) to return EINVAL on a zombie task.Nicolas Lacasse
Despite what the man page says, linux will return EINVAL when calling getdents() an a /proc/[tid]/net file corresponding to a zombie task. This causes readdir() to return a null pointer AND errno=EINVAL. See fs/proc/proc_net.c:proc_tgid_net_readdir() for where this occurs. We have tests that recursively read /proc, and are likely to hit this when running natively, so we must catch and handle this case. PiperOrigin-RevId: 317674168
2020-06-18Fix vfs2 tmpfs link permission checks.Dean Deng
Updates #2923. PiperOrigin-RevId: 317246916
2020-06-18Remove various uses of 'whitelist'Michael Pratt
Updates #2972 PiperOrigin-RevId: 317113059
2020-06-18Support setsockopt SO_SNDBUF/SO_RCVBUF for raw/udp sockets.Bhasker Hariharan
Updates #173,#6 Fixes #2888 PiperOrigin-RevId: 317087652
2020-06-17Add test for stat("/proc/net/snmp").Ian Gudger
PiperOrigin-RevId: 316974863
2020-06-17Proc test: Allow root mount pathname to be non-root.Nicolas Lacasse
The test was expecting that the root mount pathname was "/", but it doesn't need to be. Only the mount point actually should be "/" (otherwise it is not the root). PiperOrigin-RevId: 316968025
2020-06-17Fix TtlDefault test on linux.Bhasker Hariharan
Different flavors of linux seem to use different defaults we accept 64 or 127 as the TtlDefault in the test. PiperOrigin-RevId: 316961150
2020-06-17Implement POSIX locksFabricio Voznika
- Change FileDescriptionImpl Lock/UnlockPOSIX signature to take {start,length,whence}, so the correct offset can be calculated in the implementations. - Create PosixLocker interface to make it possible to share the same locking code from different implementations. Closes #1480 PiperOrigin-RevId: 316910286
2020-06-15Internal change.Martijn Vels
PiperOrigin-RevId: 316492839
2020-06-15Correctly set the test VFS environment variable.Rahat Mahmood
Also fix test bugs uncovered now that they aren't silently skipped on VFS2. Updates #1487. PiperOrigin-RevId: 316415807
2020-06-12Allow reading IP_MULTICAST_LOOP and IP_MULTICAST_TTL on TCP sockets.Ian Gudger
I am not really sure what the point of this is, but someone filed a bug about it, so I assume something relies on it. PiperOrigin-RevId: 316225127
2020-06-12vfs2: implement fcntl(fd, F_SETFL, flags)Andrei Vagin
PiperOrigin-RevId: 316148074
2020-06-11Merge pull request #2705 from lubinszARM:pr_sigfp_nestedgVisor bot
PiperOrigin-RevId: 315979564
2020-06-10Add support for SO_REUSEADDR to UDP sockets/endpoints.Ian Gudger
On UDP sockets, SO_REUSEADDR allows multiple sockets to bind to the same address, but only delivers packets to the most recently bound socket. This differs from the behavior of SO_REUSEADDR on TCP sockets. SO_REUSEADDR for TCP sockets will likely need an almost completely independent implementation. SO_REUSEADDR has some odd interactions with the similar SO_REUSEPORT. These interactions are tested fairly extensively and all but one particularly odd one (that honestly seems like a bug) behave the same on gVisor and Linux. PiperOrigin-RevId: 315844832
2020-06-10Fix the error code for syscall test with null TOS.Nayana Bidari
The setsockopt with nullptr can fail with either EFAULT or zero. PiperOrigin-RevId: 315777107
2020-06-10{S,G}etsockopt for TCP_KEEPCNT option.Nayana Bidari
TCP_KEEPCNT is used to set the maximum keepalive probes to be sent before dropping the connection. WANT_LGTM=jchacon PiperOrigin-RevId: 315758094
2020-06-10socket/unix: handle sendto address argument for connected socketsAndrei Vagin
In case of SOCK_SEQPACKET, it has to be ignored. In case of SOCK_STREAM, EISCONN or EOPNOTSUPP has to be returned. PiperOrigin-RevId: 315755972
2020-06-09Implement flock(2) in VFS2Fabricio Voznika
LockFD is the generic implementation that can be embedded in FileDescriptionImpl implementations. Unique lock ID is maintained in vfs.FileDescription and is created on demand. Updates #1480 PiperOrigin-RevId: 315604825
2020-06-09Fix write hang bug found by syzkaller.gVisor bot
After this change e.mu is only promoted to exclusively locked during route.Resolve. It downgrades back to read-lock afterwards. This prevents the second RLock() call gets stuck later in the stack. https://syzkaller.appspot.com/bug?id=065b893bd8d1d04a4e0a1d53c578537cde1efe99 Syzkaller logs does not contain interesting stack traces. The following stack trace is obtained by running repro locally. goroutine 53 [semacquire, 3 minutes]: runtime.gopark(0xfd4278, 0x1896320, 0xc000301912, 0x4) GOROOT/src/runtime/proc.go:304 +0xe0 fp=0xc0000e25f8 sp=0xc0000e25d8 pc=0x437170 runtime.goparkunlock(...) GOROOT/src/runtime/proc.go:310 runtime.semacquire1(0xc0001220b0, 0xc00000a300, 0x1, 0x0) GOROOT/src/runtime/sema.go:144 +0x1c0 fp=0xc0000e2660 sp=0xc0000e25f8 pc=0x4484e0 sync.runtime_Semacquire(0xc0001220b0) GOROOT/src/runtime/sema.go:56 +0x42 fp=0xc0000e2690 sp=0xc0000e2660 pc=0x448132 gvisor.dev/gvisor/pkg/sync.(*RWMutex).RLock(...) pkg/sync/rwmutex_unsafe.go:76 gvisor.dev/gvisor/pkg/tcpip/transport/udp.(*endpoint).HandleControlPacket(0xc000122000, 0x7ee5, 0xc00053c16c, 0x4, 0x5e21, 0xc00053c224, 0x4, 0x1, 0x0, 0xc00007ed00) pkg/tcpip/transport/udp/endpoint.go:1345 +0x169 fp=0xc0000e26d8 sp=0xc0000e2690 pc=0x9843f9 ...... gvisor.dev/gvisor/pkg/tcpip/transport/udp.(*protocol).HandleUnknownDestinationPacket(0x18bb5a0, 0xc000556540, 0x5e21, 0xc00053c16c, 0x4, 0x7ee5, 0xc00053c1ec, 0x4, 0xc00007e680, 0x4) pkg/tcpip/transport/udp/protocol.go:143 +0xb9a fp=0xc0000e8260 sp=0xc0000e7510 pc=0x9859ba ...... gvisor.dev/gvisor/pkg/tcpip/transport/udp.sendUDP(0xc0001220d0, 0xc00053ece0, 0x1, 0x1, 0x883, 0x1405e217ee5, 0x11100a0, 0xc000592000, 0xf88780) pkg/tcpip/transport/udp/endpoint.go:924 +0x3b0 fp=0xc0000ed390 sp=0xc0000ec750 pc=0x981af0 gvisor.dev/gvisor/pkg/tcpip/transport/udp.(*endpoint).write(0xc000122000, 0x11104e0, 0xc00020a460, 0x0, 0x0, 0x0, 0x0, 0x0) pkg/tcpip/transport/udp/endpoint.go:510 +0x4ad fp=0xc0000ed658 sp=0xc0000ed390 pc=0x97f2dd PiperOrigin-RevId: 315590041
2020-06-07Merge pull request #2788 from lubinszARM:pr_exec_2gVisor bot
PiperOrigin-RevId: 315166991
2020-06-05Unshare files on execAndrei Vagin
The current task can share its fdtable with a few other tasks, but after exec, this should be a completely separate process. PiperOrigin-RevId: 314999565
2020-06-05Fix error code returned due to Port exhaustion.Bhasker Hariharan
For TCP sockets gVisor incorrectly returns EAGAIN when no ephemeral ports are available to bind during a connect. Linux returns EADDRNOTAVAIL. This change fixes gVisor to return the correct code and adds a test for the same. This change also fixes a minor bug for ping sockets where connect() would fail with EINVAL unless the socket was bound first. Also added tests for testing UDP Port exhaustion and Ping socket port exhaustion. PiperOrigin-RevId: 314988525
2020-06-03Add test for O_TRUNCZach Koopmans
b/36576592 calls out an edge case previously not supported by HostFS. HostFS is currently being removed, meaning gVisor supports this feature. Simply add the test to open_test. PiperOrigin-RevId: 314610226
2020-06-02Check that two sockets with different types can't be connected to each otherAndrei Vagin
PiperOrigin-RevId: 314450191
2020-06-01Add inotify events for extended attributes and splice.Dean Deng
Splice, setxattr and removexattr should generate events. Note that VFS2 already generates events for extended attributes. Updates #1479. PiperOrigin-RevId: 314244261
2020-06-01Deflake pty_test_linux.Nicolas Lacasse
PiperOrigin-RevId: 314208973
2020-06-01Fix inotify test.Dean Deng
PiperOrigin-RevId: 314192441
2020-06-01Skip proc/pid/fd socket test for VFS1 only.Dean Deng
PiperOrigin-RevId: 314192359
2020-05-29Implement IN_EXCL_UNLINK inotify option in vfs2.Dean Deng
Limited to tmpfs. Inotify support in other filesystem implementations to follow. Updates #1479 PiperOrigin-RevId: 313828648
2020-05-29Port inotify to vfs2, with support in tmpfs.Dean Deng
Support in other filesystem impls is still needed. Unlike in Linux and vfs1, we need to plumb inotify down to each filesystem implementation in order to keep track of links/inode structures properly. IN_EXCL_UNLINK still needs to be implemented, as well as a few inotify hooks that are not present in either vfs1 or vfs2. Those will be addressed in subsequent changes. Updates #1479. PiperOrigin-RevId: 313781995
2020-05-28minor changes in exec_binary test case for Arm64Bin Lu
Signed-off-by: Bin Lu <bin.lu@arm.com>
2020-05-26Implement splice(2) and tee(2) for VFS2.Jamie Liu
Updates #138 PiperOrigin-RevId: 313326354
2020-05-21Skip socket tests only if running on vfs1.Dean Deng
PiperOrigin-RevId: 312763249
2020-05-20Avoid all caps FIONREAD as test name.Jay Zhuang
PiperOrigin-RevId: 312596169
2020-05-19Skip itimer "fairness" tests on ptrace.Jamie Liu
With additional logging, the issue described by the new comment looks like: D0518 21:28:08.416810 6777 task_signals.go:459] [ 8] Notified of signal 27 D0518 21:28:08.416852 6777 task_block.go:223] [ 8] Interrupt queued D0518 21:28:08.417013 6777 task_run.go:250] [ 8] Switching to sentry D0518 21:28:08.417033 6777 task_signals.go:220] [ 8] Signal 27: delivering to handler D0518 21:28:08.417127 6777 task_run.go:248] [ 8] Switching to app D0518 21:28:08.443765 6777 task_signals.go:519] [ 8] Refusing masked signal 27 // ED: note the ~26ms elapsed since TID 8 "switched to app" D0518 21:28:08.443814 6777 task_signals.go:465] [ 6] Notified of group signal 27 D0518 21:28:08.443832 6777 task_block.go:223] [ 6] Interrupt queued D0518 21:28:08.443914 6777 task_block.go:223] [ 6] Interrupt queued D0518 21:28:08.443859 6777 task_run.go:250] [ 8] Switching to sentry I0518 21:28:08.443936 6777 strace.go:576] [ 8] exe E rt_sigreturn() Slow context switches on ptrace are probably due to kernel scheduling delays. Slow context switches on KVM are less clear, so leave that bug and TODO open. PiperOrigin-RevId: 312322782
2020-05-19Fix flaky udp tests by polling before reading.Dean Deng
On native Linux, calling recv/read right after send/write sometimes returns EWOULDBLOCK, if the data has not made it to the receiving socket (even though the endpoints are on the same host). Poll before reading to avoid this. Making this change also uncovered a hostinet bug (gvisor.dev/issue/2726), which is noted in this CL. PiperOrigin-RevId: 312320587
2020-05-15passed the syscall test case 'fpsig_nested' on Arm64 platformBin Lu
Some functions were added for Arm64 platform: a, get_fp/set_fp b, inline_tgkill Test step: bazel test //test/syscalls:fpsig_nested_test_runsc_ptrace Signed-off-by: Bin Lu <bin.lu@arm.com>
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-20 10:30:22 +0000