panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xfe6133] goroutine 336 gp=0xc0009f7500 m=0 mp=0x2de5b20 [running]: panic({0x1c586e0?, 0x2c2cca0?}) bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x168 fp=0xc000f24d60 sp=0xc000f24cb0 pc=0x478628 runtime.panicmem(...) bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:262 runtime.sigpanic() bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/signal_unix.go:900 +0x359 fp=0xc000f24dc0 sp=0xc000f24d60 pc=0x47adf9 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).SendGroupSignal(0x0, 0xc000bcaf00) pkg/sentry/kernel/task_signals.go:385 +0x53 fp=0xc000f24e50 sp=0xc000f24dc0 pc=0xfe6133 gvisor.dev/gvisor/pkg/sentry/kernel.(*rlimitCPUSoftListener).NotifyTimer(0xc000fa53b0, 0xc000fa5370?) pkg/sentry/kernel/task_acct.go:151 +0xea fp=0xc000f24e80 sp=0xc000f24e50 pc=0xfb168a gvisor.dev/gvisor/pkg/sentry/ktime.(*SyntheticTimer).Set(0xc000fa5370, {0x0?, {0x0?}, 0xc000c8ae60?}, 0x0) pkg/sentry/ktime/synthetic_timer.go:139 +0x342 fp=0xc000f24f58 sp=0xc000f24e80 pc=0xb71562 gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).notifyRlimitCPUUpdated(0xc000fa4c08, 0x0) pkg/sentry/kernel/task_acct.go:103 +0x18a fp=0xc000f25000 sp=0xc000f24f58 pc=0xfb116a gvisor.dev/gvisor/pkg/sentry/kernel.(*Kernel).NewThreadGroup(0xc00027d008, 0xc000a32930, 0xc00103b930, 0x0, 0xc00103b940) pkg/sentry/kernel/thread_group.go:308 +0x709 fp=0xc000f25078 sp=0xc000f25000 pc=0xffc9a9 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc001052c88, 0xc000f255a0) pkg/sentry/kernel/task_clone.go:238 +0x217a fp=0xc000f25580 sp=0xc000f25078 pc=0xfba21a gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0xc001052c88, 0x200, 0x0, 0x0, 0x0, 0x0) pkg/sentry/syscalls/linux/sys_thread.go:215 +0x130 fp=0xc000f25670 sp=0xc000f25580 pc=0x12c55d0 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc001052c88, 0x0?, {{0x200}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0xef fp=0xc000f256e8 sp=0xc000f25670 pc=0x12618af gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc001052c88, 0x38, {{0x200}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0xb9f fp=0xc000f25998 sp=0xc000f256e8 pc=0xff329f gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc001052c88, 0x38, {{0x200}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x85 fp=0xc000f25a40 sp=0xc000f25998 pc=0xff53c5 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc001052c88, 0x38, {{0x200}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0xc7 fp=0xc000f25ab0 sp=0xc000f25a40 pc=0xff4ce7 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc001052c88) pkg/sentry/kernel/task_syscall.go:258 +0x54a fp=0xc000f25bd0 sp=0xc000f25ab0 pc=0xff484a gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc001052c88?, 0xc001052c88) pkg/sentry/kernel/task_run.go:269 +0x2295 fp=0xc000f25e78 sp=0xc000f25bd0 pc=0xfdf2d5 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001052c88, 0x43) pkg/sentry/kernel/task_run.go:97 +0x41b fp=0xc000f25fb0 sp=0xc000f25e78 pc=0xfdc5fb gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1() pkg/sentry/kernel/task_start.go:400 +0x45 fp=0xc000f25fe0 sp=0xc000f25fb0 pc=0xff0ba5 runtime.goexit({}) src/runtime/asm_amd64.s:1700 +0x1 fp=0xc000f25fe8 sp=0xc000f25fe0 pc=0x4819a1 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 319 pkg/sentry/kernel/task_start.go:400 +0x185