panic: runtime error: index out of range [0] with length 0 goroutine 690 [running]: panic(0x19afaa0, 0xc000548198) GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc00082ff70 sp=0xc00082fea8 pc=0x43a6c5 runtime.goPanicIndex(0x0, 0x0) GOROOT/src/runtime/panic.go:88 +0xa5 fp=0xc00082ffb8 sp=0xc00082ff70 pc=0x437a25 gvisor.dev/gvisor/pkg/tcpip/header.ICMPv4.Type(...) pkg/tcpip/header/icmpv4.go:118 gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*protocol).returnError(0xc0005c2380, 0x1d3a858, 0xc0001a63d2, 0xc0005a06c0, 0x0, 0x0) pkg/tcpip/network/ipv4/icmp.go:575 +0x13ce fp=0xc000830378 sp=0xc00082ffb8 pc=0xf394ae gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).handleValidatedPacket(0xc0004d0700, 0xc00055446e, 0x18, 0x34, 0xc0005a06c0, 0xc000040258, 0x7) pkg/tcpip/network/ipv4/ipv4.go:963 +0x16d6 fp=0xc000830c28 sp=0xc000830378 pc=0xf43456 gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).HandlePacket(0xc0004d0700, 0xc0005a06c0) pkg/tcpip/network/ipv4/ipv4.go:851 +0x1ea fp=0xc000830ec8 sp=0xc000830c28 pc=0xf4168a gvisor.dev/gvisor/pkg/tcpip/stack.(*nic).DeliverNetworkPacket(0xc0005d2540, 0xc0001a6390, 0x6, 0x0, 0x0, 0x800, 0xc0005a06c0) pkg/tcpip/stack/nic.go:781 +0x445 fp=0xc000830fc0 sp=0xc000830ec8 pc=0xc8d7a5 gvisor.dev/gvisor/pkg/tcpip/link/channel.(*Endpoint).InjectLinkAddr(...) pkg/tcpip/link/channel/channel.go:195 gvisor.dev/gvisor/pkg/tcpip/link/tun.(*Device).Write(0xc0008025a8, 0xc00055446e, 0x42, 0x34, 0x0, 0x1, 0x20000000) pkg/tcpip/link/tun/device.go:235 +0x48f fp=0xc0008310f8 sp=0xc000830fc0 pc=0xf8a0ef gvisor.dev/gvisor/pkg/sentry/devices/tundev.(*tunFD).Write(0xc000802540, 0x1d5a6a0, 0xc000537500, 0x1d551d0, 0xc000876000, 0x0, 0x1, 0x20000000, 0x42, 0x100, ...) pkg/sentry/devices/tundev/tundev.go:146 +0x237 fp=0xc000831220 sp=0xc0008310f8 pc=0x15321d7 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).Write(0xc000802540, 0x1d5a6a0, 0xc000537500, 0x1d551d0, 0xc000876000, 0x0, 0x1, 0x20000000, 0x42, 0x100, ...) pkg/sentry/vfs/file_description.go:657 +0x131 fp=0xc000831300 sp=0xc000831220 pc=0x94dcf1 gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.write(0xc000537500, 0xc000802540, 0x1d551d0, 0xc000876000, 0x0, 0x1, 0x20000000, 0x42, 0x100, 0x0, ...) pkg/sentry/syscalls/linux/vfs2/read_write.go:345 +0xee fp=0xc000831558 sp=0xc000831300 pc=0x141cc4e gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.Write(0xc000537500, 0xf0, 0x20000000, 0x42, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, ...) pkg/sentry/syscalls/linux/vfs2/read_write.go:314 +0x308 fp=0xc000831710 sp=0xc000831558 pc=0x141c448 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000537500, 0x1, 0xf0, 0x20000000, 0x42, 0x0, 0x0, 0x0, 0x0, 0x0, ...) pkg/sentry/kernel/task_syscall.go:103 +0x453 fp=0xc0008319b0 sp=0xc000831710 pc=0xd69f93 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000537500, 0x1, 0xf0, 0x20000000, 0x42, 0x0, 0x0, 0x0, 0xc000537ddf, 0xc000537500) pkg/sentry/kernel/task_syscall.go:238 +0xb4 fp=0xc000831a88 sp=0xc0008319b0 pc=0xd6b774 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000537500, 0x1, 0xf0, 0x20000000, 0x42, 0x0, 0x0, 0x0, 0x47910c, 0x486adf) pkg/sentry/kernel/task_syscall.go:198 +0x10f fp=0xc000831b30 sp=0xc000831a88 pc=0xd6b06f gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000537500, 0x2, 0xc000537500) pkg/sentry/kernel/task_syscall.go:173 +0x214 fp=0xc000831ca0 sp=0xc000831b30 pc=0xd6a7f4 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc000537500, 0x1d2dd80, 0x0) pkg/sentry/kernel/task_run.go:282 +0x12c7 fp=0xc000831ed0 sp=0xc000831ca0 pc=0xd56887 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000537500, 0xf) pkg/sentry/kernel/task_run.go:97 +0x393 fp=0xc000831fd0 sp=0xc000831ed0 pc=0xd549b3 runtime.goexit() src/runtime/asm_amd64.s:1371 +0x1 fp=0xc000831fd8 sp=0xc000831fd0 pc=0x477541 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:327 +0x1a5