panic: runtime error: slice bounds out of range [255:20] goroutine 757407 [running]: panic(0x11a2300, 0xc096ce5f40) GOROOT/src/runtime/panic.go:1064 +0x470 fp=0xc09572d368 sp=0xc09572d2b0 pc=0x437030 runtime.goPanicSliceB(0xff, 0x14) GOROOT/src/runtime/panic.go:116 +0xa5 fp=0xc09572d3b0 sp=0xc09572d368 pc=0x434fc5 gvisor.dev/gvisor/pkg/tcpip/header.(*IPv4OptionTimestamp).UpdateTimestamp(0xc09572d478, 0xc09098cd24, 0x4, 0x13f2f40, 0xc00020aa00) pkg/tcpip/header/ipv4.go:902 +0x58b fp=0xc09572d440 sp=0xc09572d3b0 pc=0x9491eb gvisor.dev/gvisor/pkg/tcpip/network/ipv4.handleTimestamp(0xc00749146a, 0x14, 0x28, 0xc09098cd24, 0x4, 0x13f2f40, 0xc00020aa00, 0x13d6b00, 0x1d03f18, 0x0, ...) pkg/tcpip/network/ipv4/ipv4.go:1451 +0x254 fp=0xc09572d478 sp=0xc09572d440 pc=0xb98854 gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).processIPOptions(0xc08bc91220, 0xc000eb03c0, 0xc08d6faa22, 0x14, 0x14, 0x13d6b00, 0x1d03f18, 0x0, 0x0, 0x0, ...) pkg/tcpip/network/ipv4/ipv4.go:1616 +0x87b fp=0xc09572dcd8 sp=0xc09572d478 pc=0xb9939b gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).handleICMP(0xc08bc91220, 0xc000eb03c0) pkg/tcpip/network/ipv4/icmp.go:130 +0x398 fp=0xc09572e6c8 sp=0xc09572dcd8 pc=0xb8ed58 gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).handlePacket(0xc08bc91220, 0xc000eb03c0) pkg/tcpip/network/ipv4/ipv4.go:858 +0x1112 fp=0xc09572ef08 sp=0xc09572e6c8 pc=0xb965d2 gvisor.dev/gvisor/pkg/tcpip/network/ipv4.(*endpoint).HandlePacket(0xc08bc91220, 0xc000eb03c0) pkg/tcpip/network/ipv4/ipv4.go:672 +0x145 fp=0xc09572f5d0 sp=0xc09572ef08 pc=0xb95385 gvisor.dev/gvisor/pkg/tcpip/stack.(*NIC).DeliverNetworkPacket(0xc08f918b00, 0xc095c20840, 0x6, 0x0, 0x0, 0x800, 0xc000eb03c0) pkg/tcpip/stack/nic.go:778 +0x682 fp=0xc09572f6c0 sp=0xc09572f5d0 pc=0x992a82 gvisor.dev/gvisor/pkg/tcpip/link/channel.(*Endpoint).InjectLinkAddr(...) pkg/tcpip/link/channel/channel.go:223 gvisor.dev/gvisor/pkg/tcpip/link/tun.(*Device).Write(0xc08e47f7a8, 0xc08d6faa00, 0x3e, 0x3e, 0x20000100, 0x3e, 0x100) pkg/tcpip/link/tun/device.go:291 +0x434 fp=0xc09572f7b8 sp=0xc09572f6c0 pc=0xc87e74 gvisor.dev/gvisor/pkg/sentry/devices/tundev.(*tunFD).Write(0xc08e47f740, 0x1402d60, 0xc0095db500, 0x13fdf60, 0xc007015000, 0x0, 0x1, 0x20000100, 0x3e, 0x100, ...) pkg/sentry/devices/tundev/tundev.go:188 +0x1a9 fp=0xc09572f888 sp=0xc09572f7b8 pc=0xf29189 gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).Write(0xc08e47f740, 0x1402d60, 0xc0095db500, 0x13fdf60, 0xc007015000, 0x0, 0x1, 0x20000100, 0x3e, 0x100, ...) pkg/sentry/vfs/file_description.go:695 +0xb5 fp=0xc09572f908 sp=0xc09572f888 pc=0x7d5715 gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.write(0xc0095db500, 0xc08e47f740, 0x13fdf60, 0xc007015000, 0x0, 0x1, 0x20000100, 0x3e, 0x100, 0x0, ...) pkg/sentry/syscalls/linux/vfs2/read_write.go:454 +0xa5 fp=0xc09572fa98 sp=0xc09572f908 pc=0xe5bf45 gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.Write(0xc0095db500, 0xf0, 0x20000100, 0x3e, 0x2b4cc21029d0, 0x0, 0x0, 0x0, 0x0, 0x0, ...) pkg/sentry/syscalls/linux/vfs2/read_write.go:417 +0x21e fp=0xc09572fb90 sp=0xc09572fa98 pc=0xe5b7de gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0095db500, 0x1, 0xf0, 0x20000100, 0x3e, 0x2b4cc21029d0, 0x0, 0x0, 0xea72d7, 0x1272f60, ...) pkg/sentry/kernel/task_syscall.go:116 +0x1b9 fp=0xc09572fc50 sp=0xc09572fb90 pc=0xa470f9 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0095db500, 0x1, 0xf0, 0x20000100, 0x3e, 0x2b4cc21029d0, 0x0, 0x0, 0x0, 0x0) pkg/sentry/kernel/task_syscall.go:291 +0x70 fp=0xc09572fcd8 sp=0xc09572fc50 pc=0xa48410 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0095db500, 0x1, 0xf0, 0x20000100, 0x3e, 0x2b4cc21029d0, 0x0, 0x0, 0x0, 0x0) pkg/sentry/kernel/task_syscall.go:238 +0xb4 fp=0xc09572fd38 sp=0xc09572fcd8 pc=0xa47eb4 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0095db500, 0x2, 0xc0095db500) pkg/sentry/kernel/task_syscall.go:205 +0x198 fp=0xc09572fe08 sp=0xc09572fd38 pc=0xa47798 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc0095db500, 0x13d5ba0, 0x0) pkg/sentry/kernel/task_run.go:327 +0xd8c fp=0xc09572ff60 sp=0xc09572fe08 pc=0xa3a10c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0095db500, 0x3350) pkg/sentry/kernel/task_run.go:100 +0x1e2 fp=0xc09572ffd0 sp=0xc09572ff60 pc=0xa38c02 runtime.goexit() src/runtime/asm_amd64.s:1374 +0x1 fp=0xc09572ffd8 sp=0xc09572ffd0 pc=0x4705a1 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start pkg/sentry/kernel/task_start.go:374 +0x116