panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xb16cd8] goroutine 107169 gp=0xc000d00c40 m=35 mp=0xc001d7a708 [running]: panic({0x12ad7a0?, 0x236f6b0?}) bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x168 fp=0xc01117b390 sp=0xc01117b2e0 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=0xc01117b3f0 sp=0xc01117b390 pc=0x476719 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).SendGroupSignal(0x0, 0xc010ff0580) pkg/sentry/kernel/task_signals.go:385 +0x38 fp=0xc01117b450 sp=0xc01117b3f0 pc=0xb16cd8 gvisor.dev/gvisor/pkg/sentry/kernel.(*rlimitCPUSoftListener).NotifyTimer(0x1000f960b98?, 0xc00a3bb370?) pkg/sentry/kernel/task_acct.go:151 +0x57 fp=0xc01117b478 sp=0xc01117b450 pc=0xaf6977 gvisor.dev/gvisor/pkg/sentry/ktime.(*SyntheticTimer).Set(0xc00a3bb370, {0x0?, {0x85aa38?}, 0x0?}, 0x0) pkg/sentry/ktime/synthetic_timer.go:139 +0x256 fp=0xc01117b518 sp=0xc01117b478 pc=0x85c836 gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).notifyRlimitCPUUpdated(0xc00a3bac08, 0x0) pkg/sentry/kernel/task_acct.go:103 +0x145 fp=0xc01117b590 sp=0xc01117b518 pc=0xaf6685 gvisor.dev/gvisor/pkg/sentry/kernel.(*Kernel).NewThreadGroup(0xc0001ab008, 0xc00c3093b0, 0xc010fe9030, 0x0, 0xc010fe9040) pkg/sentry/kernel/thread_group.go:308 +0x3ac fp=0xc01117b5d0 sp=0xc01117b590 pc=0xb23a0c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc01047c008, 0xc01117b978) pkg/sentry/kernel/task_clone.go:238 +0x143b fp=0xc01117b968 sp=0xc01117b5d0 pc=0xafc47b gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0xc010f30100?, 0xce0980?, 0x55d104b4c088?, 0x0?, 0x0?, 0xc00e3b1a40?) pkg/sentry/syscalls/linux/sys_thread.go:215 +0xbd fp=0xc01117ba38 sp=0xc01117b968 pc=0xcfdbdd gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc01047c008?, 0x6fd16c?, {{0xc00e4000}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0x68 fp=0xc01117ba78 sp=0xc01117ba38 pc=0xcbdc28 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc01047c008, 0x38, {{0xc00e4000}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0x80b fp=0xc01117bca8 sp=0xc01117ba78 pc=0xb1e2ab gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc01047c008, 0x38, {{0xc00e4000}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x4e fp=0xc01117bd00 sp=0xc01117bca8 pc=0xb1f84e gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc01047c008, 0x38, {{0xc00e4000}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0x7d fp=0xc01117bd50 sp=0xc01117bd00 pc=0xb1f3fd gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc015419d90?) pkg/sentry/kernel/task_syscall.go:258 +0x349 fp=0xc01117be28 sp=0xc01117bd50 pc=0xb1f0e9 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc009690cf0?, 0xc01047c008) pkg/sentry/kernel/task_run.go:269 +0x1325 fp=0xc01117bf38 sp=0xc01117be28 pc=0xb12945 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc01047c008, 0x59f9) pkg/sentry/kernel/task_run.go:97 +0x27d fp=0xc01117bfc0 sp=0xc01117bf38 pc=0xb10f5d gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1() pkg/sentry/kernel/task_start.go:400 +0x25 fp=0xc01117bfe0 sp=0xc01117bfc0 pc=0xb1c825 runtime.goexit({}) src/runtime/asm_amd64.s:1700 +0x1 fp=0xc01117bfe8 sp=0xc01117bfe0 pc=0x47d0c1 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 107147 pkg/sentry/kernel/task_start.go:400 +0xd9