panic: runtime error: integer divide by zero goroutine 2384527 [running]: panic(0xef2ca0, 0x1a1bb00) GOROOT/src/runtime/panic.go:1064 +0x46d fp=0xc0017ad378 sp=0xc0017ad2c0 pc=0x43438d runtime.panicdivide() GOROOT/src/runtime/panic.go:191 +0x5b fp=0xc0017ad398 sp=0xc0017ad378 pc=0x432afb gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).bucket(0xc00016e890, 0x0, 0x0, 0x0, 0x0, 0x0, 0x600000000, 0x800, 0x0) pkg/tcpip/stack/conntrack.go:508 +0x299 fp=0xc0017ad438 sp=0xc0017ad398 pc=0x80d6e9 gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).connForTID(0xc00016e890, 0x0, 0x0, 0x0, 0x0, 0x0, 0x600000000, 0x800, 0x0, 0x0) pkg/tcpip/stack/conntrack.go:247 +0xa4 fp=0xc0017ad520 sp=0xc0017ad438 pc=0x80b964 gvisor.dev/gvisor/pkg/tcpip/stack.(*ConnTrack).originalDst(0xc00016e890, 0x0, 0x0, 0x0, 0x0, 0x0, 0x0, 0xc0013cce60, 0x20, 0x20, ...) pkg/tcpip/stack/conntrack.go:623 +0xe6 fp=0xc0017ad5b8 sp=0xc0017ad520 pc=0x80e086 gvisor.dev/gvisor/pkg/tcpip/stack.(*IPTables).OriginalDst(...) pkg/tcpip/stack/iptables.go:422 gvisor.dev/gvisor/pkg/tcpip/transport/tcp.(*endpoint).GetSockOpt(0xc001c0c600, 0xe74160, 0xc0013cce60, 0xc000d83890) pkg/tcpip/transport/tcp/endpoint.go:2054 +0x1a1 fp=0xc0017ad6c0 sp=0xc0017ad5b8 pc=0x9ab411 gvisor.dev/gvisor/pkg/sentry/socket/netstack.getSockOptIP(0xc001deca80, 0x122a540, 0xc030410000, 0x7f6a8ff9f748, 0xc001c0c600, 0x50, 0x20001280, 0x1000, 0x2, 0x10541e0, ...) pkg/sentry/socket/netstack/netstack.go:1631 +0xfd2 fp=0xc0017ad898 sp=0xc0017ad6c0 pc=0x9eee22 gvisor.dev/gvisor/pkg/sentry/socket/netstack.GetSockOpt(0xc001deca80, 0x122a540, 0xc030410000, 0x7f6a8ff9f748, 0xc001c0c600, 0x2, 0x1, 0x0, 0x50, 0x20001280, ...) pkg/sentry/socket/netstack/netstack.go:1003 +0x187 fp=0xc0017ad908 sp=0xc0017ad898 pc=0x9ea1d7 gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*SocketOperations).GetSockOpt(0xc030410000, 0xc001deca80, 0x0, 0x50, 0x20001280, 0x1000, 0x0, 0x0, 0x0) pkg/sentry/socket/netstack/netstack.go:986 +0x35e fp=0xc0017ad9c8 sp=0xc0017ad908 pc=0x9e9fde gvisor.dev/gvisor/pkg/sentry/syscalls/linux.getSockOpt(0xc001deca80, 0x7f6a8ff9f630, 0xc030410000, 0x0, 0x50, 0x20001280, 0x1000, 0xc001ded3bc, 0x10, 0x90) pkg/sentry/syscalls/linux/sys_socket.go:514 +0xae fp=0xc0017ada38 sp=0xc0017ad9c8 pc=0x93bbbe gvisor.dev/gvisor/pkg/sentry/syscalls/linux.GetSockOpt(0xc001deca80, 0x5, 0x0, 0x50, 0x20001280, 0x20000040, 0x0, 0x0, 0x0, 0x0, ...) pkg/sentry/syscalls/linux/sys_socket.go:468 +0x218 fp=0xc0017adb08 sp=0xc0017ada38 pc=0x93b6b8 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc001deca80, 0x37, 0x5, 0x0, 0x50, 0x20001280, 0x20000040, 0x0, 0x0, 0x1055cc0, ...) pkg/sentry/kernel/task_syscall.go:103 +0x122 fp=0xc0017adc68 sp=0xc0017adb08 pc=0x8ca7b2 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc001deca80, 0x37, 0x5, 0x0, 0x50, 0x20001280, 0x20000040, 0x0, 0x20000040, 0x0) pkg/sentry/kernel/task_syscall.go:238 +0x66 fp=0xc0017adcf0 sp=0xc0017adc68 pc=0x8cb996 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc001deca80, 0x37, 0x5, 0x0, 0x50, 0x20001280, 0x20000040, 0x0, 0x11f6e01, 0x100000000000000) pkg/sentry/kernel/task_syscall.go:198 +0x96 fp=0xc0017add50 sp=0xc0017adcf0 pc=0x8cb526 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc001deca80, 0x2, 0xc001deca80) pkg/sentry/kernel/task_syscall.go:173 +0x15c fp=0xc0017ade10 sp=0xc0017add50 pc=0x8caebc gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc001deca80, 0x11f6e80, 0x0) pkg/sentry/kernel/task_run.go:275 +0xc18 fp=0xc0017adf60 sp=0xc0017ade10 pc=0x8bf878 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001deca80, 0x622) pkg/sentry/kernel/task_run.go:93 +0x18b fp=0xc0017adfd0 sp=0xc0017adf60 pc=0x8be54b runtime.goexit() src/runtime/asm_amd64.s:1373 +0x1 fp=0xc0017adfd8 sp=0xc0017adfd0 pc=0x467d61 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:318 +0xfe