panic: runtime error: makeslice: len out of range goroutine 6782460 [running]: gvisor.dev/gvisor/pkg/tcpip/buffer.NewView(...) pkg/tcpip/buffer/view.go:24 gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*readerPayload).Payload(0xc002902d80, 0x8000000000004, 0xc003b1c2f0, 0x0, 0xc003b1c2f0, 0xe0cb88) pkg/sentry/socket/netstack/netstack.go:568 +0x55 gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*readerPayload).FullPayload(0xc002902d80, 0x1, 0xc0008a9300, 0x0, 0x10) pkg/sentry/socket/netstack/netstack.go:560 +0x34 gvisor.dev/gvisor/pkg/tcpip/transport/udp.(*endpoint).write(0xc0068c4480, 0xf170c0, 0xc002902d80, 0x0, 0x10000, 0x0, 0x0, 0x0) pkg/tcpip/transport/udp/endpoint.go:470 +0x3b2 gvisor.dev/gvisor/pkg/tcpip/transport/udp.(*endpoint).Write(0xc0068c4480, 0xf170c0, 0xc002902d80, 0x0, 0x8000000010000, 0x0, 0x0, 0xf13260) pkg/tcpip/transport/udp/endpoint.go:360 +0x68 gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*SocketOperations).ReadFrom(0xc003f16870, 0xf2f580, 0xc0003fea80, 0xc00435b550, 0xf118e0, 0xc001fd5840, 0x8000000000004, 0x7fd0b5bbef00, 0x0, 0xf13260) pkg/sentry/socket/netstack/netstack.go:591 +0xc7 gvisor.dev/gvisor/pkg/sentry/fs.Splice(0xf2f580, 0xc0003fea80, 0xc00435b550, 0xc00435a000, 0x8000000000004, 0x0, 0x0, 0x0, 0x0, 0x0, ...) pkg/sentry/fs/splice.go:146 +0x7c7 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.doSplice(0xc0003fea80, 0xc00435b550, 0xc00435a000, 0x8000000000004, 0x0, 0x0, 0x0, 0x0, 0xc006a24000, 0x0, ...) pkg/sentry/syscalls/linux/sys_splice.go:40 +0x149 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Sendfile(0xc0003fea80, 0x5, 0x3, 0x0, 0x8000000000004, 0x0, 0x0, 0x0, 0x0, 0x0, ...) pkg/sentry/syscalls/linux/sys_splice.go:151 +0x68c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0003fea80, 0x28, 0x5, 0x3, 0x0, 0x8000000000004, 0x0, 0x0, 0x0, 0xdd2920, ...) pkg/sentry/kernel/task_syscall.go:170 +0x122 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0003fea80, 0x28, 0x5, 0x3, 0x0, 0x8000000000004, 0x0, 0x0, 0x0, 0x0) pkg/sentry/kernel/task_syscall.go:291 +0x66 DIAGNOSIS: I0316 21:33:15.446663 58514 main.go:305] *************************** I0316 21:33:15.446707 58514 main.go:306] Args: [/syzkaller/managers/main/current/image -root /syzkaller/managers/main/workdir/gvisor_root -watchdog-action=panic -network=none -debug -alsologtostderr -platform=ptrace -file-access=shared -network=none debug -stacks --ps ci-gvisor-main-3] I0316 21:33:15.446746 58514 main.go:307] Version release-20200219.0-179-g52758e16e0d1 I0316 21:33:15.446767 58514 main.go:308] PID: 58514 I0316 21:33:15.446790 58514 main.go:309] UID: 0, GID: 0 I0316 21:33:15.446811 58514 main.go:310] Configuration: I0316 21:33:15.446834 58514 main.go:311] RootDir: /syzkaller/managers/main/workdir/gvisor_root I0316 21:33:15.446858 58514 main.go:312] Platform: ptrace I0316 21:33:15.446878 58514 main.go:313] FileAccess: shared, overlay: false I0316 21:33:15.446920 58514 main.go:314] Network: none, logging: false I0316 21:33:15.446944 58514 main.go:315] Strace: false, max size: 1024, syscalls: [] I0316 21:33:15.446972 58514 main.go:316] *************************** D0316 21:33:15.450294 58514 container.go:159] Load container "/syzkaller/managers/main/workdir/gvisor_root" "ci-gvisor-main-3" D0316 21:33:15.456896 58514 container.go:592] Signal container "ci-gvisor-main-3": signal 0 D0316 21:33:15.456965 58514 sandbox.go:814] Signal sandbox "ci-gvisor-main-3" D0316 21:33:15.458332 58514 sandbox.go:318] Connecting to sandbox "ci-gvisor-main-3" D0316 21:33:15.459013 58514 urpc.go:534] urpc: successfully marshalled 96 bytes. I0316 21:33:16.688490 58514 debug.go:128] Found sandbox "ci-gvisor-main-3", PID: 56621 I0316 21:33:16.689341 58514 debug.go:137] Retrieving sandbox stacks D0316 21:33:16.689412 58514 sandbox.go:932] Stacks sandbox "ci-gvisor-main-3" D0316 21:33:16.689428 58514 sandbox.go:318] Connecting to sandbox "ci-gvisor-main-3" W0316 21:33:16.689480 58514 error.go:48] FATAL ERROR: retrieving stacks: connecting to control server at PID 56621: connection refused retrieving stacks: connecting to control server at PID 56621: connection refused W0316 21:33:16.689602 58514 main.go:338] Failure to execute command, err: 1