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Updates #2923.
PiperOrigin-RevId: 317246916
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Updates #2972
PiperOrigin-RevId: 317113059
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Updates #173,#6
Fixes #2888
PiperOrigin-RevId: 317087652
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PiperOrigin-RevId: 316974863
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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
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Different flavors of linux seem to use different defaults we accept 64
or 127 as the TtlDefault in the test.
PiperOrigin-RevId: 316961150
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- 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
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PiperOrigin-RevId: 316492839
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Also fix test bugs uncovered now that they aren't silently skipped on
VFS2.
Updates #1487.
PiperOrigin-RevId: 316415807
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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
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PiperOrigin-RevId: 316148074
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PiperOrigin-RevId: 315979564
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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
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The setsockopt with nullptr can fail with either EFAULT or zero.
PiperOrigin-RevId: 315777107
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TCP_KEEPCNT is used to set the maximum keepalive probes to be
sent before dropping the connection.
WANT_LGTM=jchacon
PiperOrigin-RevId: 315758094
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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
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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
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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
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PiperOrigin-RevId: 315166991
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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
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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
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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
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PiperOrigin-RevId: 314450191
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Splice, setxattr and removexattr should generate events. Note that VFS2 already
generates events for extended attributes.
Updates #1479.
PiperOrigin-RevId: 314244261
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PiperOrigin-RevId: 314208973
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PiperOrigin-RevId: 314192441
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PiperOrigin-RevId: 314192359
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Limited to tmpfs. Inotify support in other filesystem implementations to
follow.
Updates #1479
PiperOrigin-RevId: 313828648
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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
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Signed-off-by: Bin Lu <bin.lu@arm.com>
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Updates #138
PiperOrigin-RevId: 313326354
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PiperOrigin-RevId: 312763249
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PiperOrigin-RevId: 312596169
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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
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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
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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>
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PiperOrigin-RevId: 311657502
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PiperOrigin-RevId: 311573552
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This change adds support for TCP_SYNCNT and TCP_WINDOW_CLAMP options
in GetSockOpt/SetSockOpt. This change does not really change any
behaviour in Netstack and only stores/returns the stored value.
Actual honoring of these options will be added as required.
Fixes #2626, #2625
PiperOrigin-RevId: 311453777
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Closes #1197
PiperOrigin-RevId: 311438223
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PiperOrigin-RevId: 310941717
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Some functions were added for Arm64 platform:
a, get_fp/set_fp
b, inline_tgkill
Test step:
bazel test //test/syscalls:fpsig_fork_test_runsc_ptrace
Signed-off-by: Bin Lu <bin.lu@arm.com>
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connect() returns EINTR after S/R and usually we
use RetryEINTR to workaround this.
PiperOrigin-RevId: 310038525
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And move sys_timerfd.go to just timerfd.go for consistency.
Updates #1475.
PiperOrigin-RevId: 309835029
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There is the known issue of the linux procfs, that two consequent calls of
readdir can return the same entry twice if between these calls one or more
entries have been removed from this directory.
PiperOrigin-RevId: 309803066
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Enforce write permission checks in BoundEndpointAt, which corresponds to the
permission checks in Linux (net/unix/af_unix.c:unix_find_other).
Also, create bound socket files with the correct permissions in VFS2.
Fixes #2324.
PiperOrigin-RevId: 308949084
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TempPath's destructor runs at the end of the named pipe creation functions,
deleting the named pipe. If the named pipe is backed by a "non-virtual"
filesystem (!fs.Inode.IsVirtual()), this causes the following save attempt to
fail because there are FDs holding the deleted named pipe open.
PiperOrigin-RevId: 308861999
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Right now, sentry panics in this case:
panic: close of nil channel
goroutine 67 [running]:
pkg/tcpip/transport/tcp/tcp.(*endpoint).listen(0xc0000ce000, 0x9, 0x0)
pkg/tcpip/transport/tcp/endpoint.go:2208 +0x170
pkg/tcpip/transport/tcp/tcp.(*endpoint).Listen(0xc0000ce000, 0x9, 0xc0003a1ad0)
pkg/tcpip/transport/tcp/endpoint.go:2179 +0x50
Fixes #2468
PiperOrigin-RevId: 307896725
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PiperOrigin-RevId: 307638329
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PiperOrigin-RevId: 307453436
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