panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xb16cd8] goroutine 5446 gp=0xc001034540 m=28 mp=0xc00171e708 [running]: panic({0x12ad960?, 0x236f7d0?}) bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x168 fp=0xc00184b390 sp=0xc00184b2e0 pc=0x473fe8 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=0xc00184b3f0 sp=0xc00184b390 pc=0x476719 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).SendGroupSignal(0x0, 0xc0013b5e00) pkg/sentry/kernel/task_signals.go:385 +0x38 fp=0xc00184b450 sp=0xc00184b3f0 pc=0xb16cd8 gvisor.dev/gvisor/pkg/sentry/kernel.(*rlimitCPUSoftListener).NotifyTimer(0x100012a9318?, 0xc001385770?) pkg/sentry/kernel/task_acct.go:151 +0x57 fp=0xc00184b478 sp=0xc00184b450 pc=0xaf6977 gvisor.dev/gvisor/pkg/sentry/ktime.(*SyntheticTimer).Set(0xc001385770, {0x0?, {0x85aa38?}, 0x0?}, 0x0) pkg/sentry/ktime/synthetic_timer.go:139 +0x256 fp=0xc00184b518 sp=0xc00184b478 pc=0x85c836 gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).notifyRlimitCPUUpdated(0xc001385008, 0x0) pkg/sentry/kernel/task_acct.go:103 +0x145 fp=0xc00184b590 sp=0xc00184b518 pc=0xaf6685 gvisor.dev/gvisor/pkg/sentry/kernel.(*Kernel).NewThreadGroup(0xc000273008, 0xc001470bd0, 0xc001c11e00, 0x0, 0xc001c11e10) pkg/sentry/kernel/thread_group.go:308 +0x3ac fp=0xc00184b5d0 sp=0xc00184b590 pc=0xb23a0c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc001626c88, 0xc00184b978) pkg/sentry/kernel/task_clone.go:238 +0x143b fp=0xc00184b968 sp=0xc00184b5d0 pc=0xafc47b gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x0?, 0xc001034540?, 0x300000002?, 0xc0015bfac0?, 0x474a0e?, 0xc001034540?) pkg/sentry/syscalls/linux/sys_thread.go:215 +0xbd fp=0xc00184ba38 sp=0xc00184b968 pc=0xcfe1fd gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0x49a099?, 0xc0015bfad0?, {{0x40000000}, {0x20002200}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0x68 fp=0xc00184ba78 sp=0xc00184ba38 pc=0xcbe248 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc001626c88, 0x38, {{0x40000000}, {0x20002200}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x80b fp=0xc00184bca8 sp=0xc00184ba78 pc=0xb1e2ab gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc001626c88, 0x38, {{0x40000000}, {0x20002200}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x4e fp=0xc00184bd00 sp=0xc00184bca8 pc=0xb1f84e gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc001626c88, 0x38, {{0x40000000}, {0x20002200}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x7d fp=0xc00184bd50 sp=0xc00184bd00 pc=0xb1f3fd gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000a2fad0?) pkg/sentry/kernel/task_syscall.go:258 +0x349 fp=0xc00184be28 sp=0xc00184bd50 pc=0xb1f0e9 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc001115320?, 0xc001626c88) pkg/sentry/kernel/task_run.go:269 +0x1325 fp=0xc00184bf38 sp=0xc00184be28 pc=0xb12945 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001626c88, 0x351) pkg/sentry/kernel/task_run.go:97 +0x27d fp=0xc00184bfc0 sp=0xc00184bf38 pc=0xb10f5d gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1() pkg/sentry/kernel/task_start.go:400 +0x25 fp=0xc00184bfe0 sp=0xc00184bfc0 pc=0xb1c825 runtime.goexit({}) src/runtime/asm_amd64.s:1700 +0x1 fp=0xc00184bfe8 sp=0xc00184bfe0 pc=0x47d0c1 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 5547 pkg/sentry/kernel/task_start.go:400 +0xd9