panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x2d8 pc=0xa50087] goroutine 76668 gp=0xc009e9a700 m=47 mp=0xc005b7e808 [running]: panic({0x10e0dc0?, 0x1f3a330?}) GOROOT/src/runtime/panic.go:779 +0x158 fp=0xc005241680 sp=0xc0052415d0 pc=0x43cb78 runtime.panicmem(...) GOROOT/src/runtime/panic.go:261 runtime.sigpanic() GOROOT/src/runtime/signal_unix.go:881 +0x378 fp=0xc0052416e0 sp=0xc005241680 pc=0x456578 gvisor.dev/gvisor/pkg/tcpip/transport/tcp.(*endpoint).OnCorkOptionSet(0xc009fc3808, 0xd8?) pkg/tcpip/transport/tcp/endpoint.go:1766 +0x67 fp=0xc005241720 sp=0xc0052416e0 pc=0xa50087 gvisor.dev/gvisor/pkg/tcpip.(*SocketOptions).SetCorkOption(0x150bee8?, 0x40?) pkg/tcpip/socketops.go:474 +0x24 fp=0xc005241740 sp=0xc005241720 pc=0x65abe4 gvisor.dev/gvisor/pkg/sentry/socket/netstack.setSockOptTCP(0xc001ebc608?, {0x150bee8?, 0xc0020b0b40?}, {0x3fe6a33eea38, 0xc009fc3808}, 0x3, {0xc00a655e3c, 0x4, 0xc001de8008?}) pkg/sentry/socket/netstack/netstack.go:2015 +0x135 fp=0xc005241780 sp=0xc005241740 pc=0xaca0d5 gvisor.dev/gvisor/pkg/sentry/socket/netstack.SetSockOpt(0x8359a0?, {0x150bee8?, 0xc0020b0b40?}, {0x3fe6a33eea38?, 0xc009fc3808?}, 0xc00a655508?, 0xc005241870?, {0xc00a655e3c, 0x4, 0x90}) pkg/sentry/socket/netstack/netstack.go:1765 +0xbc fp=0xc0052417d8 sp=0xc005241780 pc=0xac94dc gvisor.dev/gvisor/pkg/sentry/socket/netstack.(*sock).SetSockOpt(0xc0020b0b40, 0x564800000003?, 0xc00a655e3c?, 0xffffffff?, {0xc00a655e3c, 0x0?, 0xc00a3a9740?}) pkg/sentry/socket/netstack/netstack.go:611 +0x235 fp=0xc005241880 sp=0xc0052417d8 pc=0xac3e75 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.SetSockOpt(0xc00a655508, 0x5638f7a00000?, {{0x3}, {0x6}, {0x3}, {0x20000040}, {0x4}, {0x0}}) pkg/sentry/syscalls/linux/sys_socket.go:551 +0x266 fp=0xc005241960 sp=0xc005241880 pc=0xb4e626 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00a655508, 0x36, {{0x3}, {0x6}, {0x3}, {0x20000040}, {0x4}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x673 fp=0xc005241ca0 sp=0xc005241960 pc=0x9c5433 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00a655508, 0x36, {{0x3}, {0x6}, {0x3}, {0x20000040}, {0x4}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x45 fp=0xc005241cf8 sp=0xc005241ca0 pc=0x9c65a5 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00a655508, 0x36, {{0x3}, {0x6}, {0x3}, {0x20000040}, {0x4}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x65 fp=0xc005241d48 sp=0xc005241cf8 pc=0x9c62a5 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc008e5b3f0?) pkg/sentry/kernel/task_syscall.go:258 +0x2a5 fp=0xc005241e30 sp=0xc005241d48 pc=0x9c6025 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00590b3b0?, 0xc00a655508) pkg/sentry/kernel/task_run.go:263 +0xef7 fp=0xc005241f48 sp=0xc005241e30 pc=0x9ba517 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00a655508, 0x73ae) pkg/sentry/kernel/task_run.go:98 +0x1e2 fp=0xc005241fc0 sp=0xc005241f48 pc=0x9b8fa2 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1() pkg/sentry/kernel/task_start.go:390 +0x25 fp=0xc005241fe0 sp=0xc005241fc0 pc=0x9c3d25 runtime.goexit({}) src/runtime/asm_amd64.s:1695 +0x1 fp=0xc005241fe8 sp=0xc005241fe0 pc=0x478c41 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 76683 pkg/sentry/kernel/task_start.go:390 +0xe5