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2019-11-07Merge release-20190806.1-382-g66ebb65 (automated)gVisor bot
2019-11-07Add support for TIME_WAIT timeout.Bhasker Hariharan
This change adds explicit support for honoring the 2MSL timeout for sockets in TIME_WAIT state. It also adds support for the TCP_LINGER2 option that allows modification of the FIN_WAIT2 state timeout duration for a given socket. It also adds an option to modify the Stack wide TIME_WAIT timeout but this is only for testing. On Linux this is fixed at 60s. Further, we also now correctly process RST's in CLOSE_WAIT and close the socket similar to linux without moving it to error state. We also now handle SYN in ESTABLISHED state as per RFC5961#section-4.1. Earlier we would just drop these SYNs. Which can result in some tests that pass on linux to fail on gVisor. Netstack now honors TIME_WAIT correctly as well as handles the following cases correctly. - TCP RSTs in TIME_WAIT are ignored. - A duplicate TCP FIN during TIME_WAIT extends the TIME_WAIT and a dup ACK is sent in response to the FIN as the dup FIN indicates potential loss of the original final ACK. - An out of order segment during TIME_WAIT generates a dup ACK. - A new SYN w/ a sequence number > the highest sequence number in the previous connection closes the TIME_WAIT early and opens a new connection. Further to make the SYN case work correctly the ISN (Initial Sequence Number) generation for Netstack has been updated to be as per RFC. Its not a pure random number anymore and follows the recommendation in https://tools.ietf.org/html/rfc6528#page-3. The current hash used is not a cryptographically secure hash function. A separate change will update the hash function used to Siphash similar to what is used in Linux. PiperOrigin-RevId: 279106406
2019-11-04Merge release-20190806.1-369-g1e21496 (automated)gVisor bot
2019-11-04Merge release-20190806.1-368-g4fdd69d (automated)gVisor bot
2019-11-04Check that a file is a regular file with open(O_TRUNC).Kevin Krakauer
It was possible to panic the sentry by opening a cache revalidating folder with O_TRUNC|O_CREAT. PiperOrigin-RevId: 278417533
2019-11-04Merge release-20190806.1-367-gb23b36e (automated)gVisor bot
2019-11-04Add NETLINK_KOBJECT_UEVENT socket supportMichael Pratt
NETLINK_KOBJECT_UEVENT sockets send udev-style messages for device events. gVisor doesn't have any device events, so our sockets don't need to do anything once created. systemd's device manager needs to be able to create one of these sockets. It also wants to install a BPF filter on the socket. Since we'll never send any messages, the filter would never be invoked, thus we just fake it out. Fixes #1117 Updates #1119 PiperOrigin-RevId: 278405893
2019-11-04Merge release-20190806.1-366-g3b4f544 (automated)gVisor bot
2019-11-04Update membarrier bugMichael Pratt
Updates #267 PiperOrigin-RevId: 278402684
2019-11-01Merge release-20190806.1-363-g515fee5 (automated)gVisor bot
2019-11-01Add SO_PASSCRED support to netlink socketsMichael Pratt
Since we only supporting sending messages from the kernel, the peer is always the kernel, simplifying handling. There are currently no known users of SO_PASSCRED that would actually receive messages from gVisor, but adding full support is barely more work than stubbing out fake support. Updates #1117 Fixes #1119 PiperOrigin-RevId: 277981465
2019-11-01Merge release-20190806.1-361-ge70f286 (automated)gVisor bot
2019-11-01Allow the watchdog to detect when the sandbox is stuck during setup.Nicolas Lacasse
The watchdog currently can find stuck tasks, but has no way to tell if the sandbox is stuck before the application starts executing. This CL adds a startup timeout and action to the watchdog. If Start() is not called before the given timeout (if non-zero), then the watchdog will take the action. PiperOrigin-RevId: 277970577
2019-11-01Merge release-20190806.1-358-ga99d347 (automated)gVisor bot
2019-10-31Add context to state.Adin Scannell
PiperOrigin-RevId: 277840416
2019-10-31Merge release-20190806.1-355-gf7dbdda (automated)gVisor bot
2019-10-31platform/kvm: calll sigtimedwait with zero timeoutAndrei Vagin
sigtimedwait is used to check pending signals and it should not block. PiperOrigin-RevId: 277777269
2019-10-30Merge release-20190806.1-348-gca93332 (automated)gVisor bot
2019-10-30support using KVM_MEM_READONLY for arm64 regionslubinszARM
On Arm platform, "setMemoryRegion" has extra permission checks. In virt/kvm/arm/mmu.c: kvm_arch_prepare_memory_region() .... if (writable && !(vma->vm_flags & VM_WRITE)) { ret = -EPERM; break; } .... So, for Arm platform, the "flags" for kvm_memory_region is required. And on x86 platform, the "flags" can be always set as '0'. Signed-off-by: Bin Lu <bin.lu@arm.com> COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/810 from lubinszARM:pr_setregion 8c99b19cfb0c859c6630a1cfff951db65fcf87ac PiperOrigin-RevId: 277602603
2019-10-29Merge release-20190806.1-343-ga2c51ef (automated)gVisor bot
2019-10-29Add endpoint tracking to the stack.Ian Gudger
In the future this will replace DanglingEndpoints. DanglingEndpoints must be kept for now due to issues with save/restore. This is arguably a cleaner design and allows the stack to know which transport endpoints might still be using its link endpoints. Updates #837 PiperOrigin-RevId: 277386633
2019-10-29Merge release-20190806.1-342-gd7f5e82 (automated)gVisor bot
2019-10-29Fix grammar in comment.Dean Deng
Missing "for". PiperOrigin-RevId: 277358513
2019-10-29Merge release-20190806.1-341-g38330e9 (automated)gVisor bot
2019-10-29Update symlink traversal limit when resolving interpreter path.Dean Deng
When execveat is called on an interpreter script, the symlink count for resolving the script path should be separate from the count for resolving the the corresponding interpreter. An ELOOP error should not occur if we do not hit the symlink limit along any individual path, even if the total number of symlinks encountered exceeds the limit. Closes #574 PiperOrigin-RevId: 277358474
2019-10-29Merge release-20190806.1-340-gc0b8fd4 (automated)gVisor bot
2019-10-29Update build tags to allow Go 1.14Michael Pratt
Currently there are no ABI changes. We should check again closer to release. PiperOrigin-RevId: 277349744
2019-10-29Merge release-20190806.1-339-g2e00771 (automated)gVisor bot
2019-10-29Refactor logic for loadExecutable.Dean Deng
Separate the handling of filenames and *fs.File objects in a more explicit way for the sake of clarity. PiperOrigin-RevId: 277344203
2019-10-29Merge release-20190806.1-333-g29273b0 (automated)gVisor bot
2019-10-29Disallow execveat on interpreter scripts with fd opened with O_CLOEXEC.Dean Deng
When an interpreter script is opened with O_CLOEXEC and the resulting fd is passed into execveat, an ENOENT error should occur (the script would otherwise be inaccessible to the interpreter). This matches the actual behavior of Linux's execveat. PiperOrigin-RevId: 277306680
2019-10-28Merge release-20190806.1-330-g198f1cd (automated)gVisor bot
2019-10-28Update commentMichael Pratt
FDTable.GetFile doesn't exist. PiperOrigin-RevId: 277089842
2019-10-26Merge release-20190806.1-329-g1c480ab (automated)gVisor bot
2019-10-25Aggregate arguments for loading executables into a single struct.Dean Deng
This change simplifies the function signatures of functions related to loading executables, such as LoadTaskImage, Load, loadBinary. PiperOrigin-RevId: 276821187
2019-10-25Merge release-20190806.1-327-g8f029b3 (automated)gVisor bot
2019-10-25Convert DelayOption to the newer/faster SockOpt int type.Ian Gudger
DelayOption is set on all new endpoints in gVisor. PiperOrigin-RevId: 276746791
2019-10-25Merge release-20190806.1-325-gfd59891 (automated)gVisor bot
2019-10-25platform/ptrace: use tgkill instead of killAndrei Vagin
The syscall filters don't allow kill, just tgkill. PiperOrigin-RevId: 276718421
2019-10-24Merge release-20190806.1-318-gd9fd536 (automated)gVisor bot
2019-10-24Handle AT_SYMLINK_NOFOLLOW flag for execveat.Dean Deng
PiperOrigin-RevId: 276441249
2019-10-23Handle AT_EMPTY_PATH flag in execveat.Dean Deng
PiperOrigin-RevId: 276419967
2019-10-23Merge release-20190806.1-315-g6d4d956 (automated)gVisor bot
2019-10-23Merge pull request #641 from tanjianfeng:mastergVisor bot
PiperOrigin-RevId: 276380008
2019-10-23Merge release-20190806.1-309-gfbe6b50 (automated)gVisor bot
2019-10-23Keep minimal available fd to accelerate fd allocationDarcySail
Use fd.next to store the iteration start position, which can be used to accelerate allocating new FDs. And adding the corresponding gtest benchmark to measure performance. @tanjianfeng COPYBARA_INTEGRATE_REVIEW=https://github.com/google/gvisor/pull/758 from DarcySail:master 96685ec7886dfe1a64988406831d3bc002b438cc PiperOrigin-RevId: 276351250
2019-10-22Merge release-20190806.1-304-gebe8001 (automated)gVisor bot
2019-10-22Update const names to be Go style.Ian Lewis
PiperOrigin-RevId: 276165962
2019-10-22Merge release-20190806.1-303-ge63ff6d (automated)gVisor bot
2019-10-22platform/ptrace: exit without panic if a stub process has been killed by SIGKILLAndrei Vagin
SIGKILL can be sent only by an user or OOM-killer. In both cases, we don't need to panic. PiperOrigin-RevId: 276150120
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