panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xf45465] goroutine 976 gp=0xc00116c700 m=12 mp=0xc000508e08 [running]: panic({0x1b67e00?, 0x2b48150?}) bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x168 fp=0xc00147cce8 sp=0xc00147cc38 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=0xc00147cd48 sp=0xc00147cce8 pc=0x47adf9 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).SendGroupSignal(0x0, 0xc00146fe00) pkg/sentry/kernel/task_signals.go:385 +0x45 fp=0xc00147cde0 sp=0xc00147cd48 pc=0xf45465 gvisor.dev/gvisor/pkg/sentry/kernel.(*rlimitCPUSoftListener).NotifyTimer(0xc000e463b0, 0xc000e46370?) pkg/sentry/kernel/task_acct.go:151 +0xca fp=0xc00147ce10 sp=0xc00147cde0 pc=0xf1354a gvisor.dev/gvisor/pkg/sentry/ktime.(*SyntheticTimer).Set(0xc000e46370, {0x0?, {0x0?}, 0x1f706c0?}, 0x0) pkg/sentry/ktime/synthetic_timer.go:139 +0x2c5 fp=0xc00147cee8 sp=0xc00147ce10 pc=0xb18565 gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).notifyRlimitCPUUpdated(0xc000e45c08, 0x0) pkg/sentry/kernel/task_acct.go:103 +0x179 fp=0xc00147cf78 sp=0xc00147cee8 pc=0xf13079 gvisor.dev/gvisor/pkg/sentry/kernel.(*Kernel).NewThreadGroup(0xc00028f008, 0xc001305d50, 0xc0004a50d0, 0x0, 0xc0004a50f0) pkg/sentry/kernel/thread_group.go:308 +0x75f fp=0xc00147cfe0 sp=0xc00147cf78 pc=0xf5a19f gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc001043908, 0xc00147d598) pkg/sentry/kernel/task_clone.go:238 +0x2565 fp=0xc00147d578 sp=0xc00147cfe0 pc=0xf1b645 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0xc001043908, 0x24204400, 0x40, 0x0, 0x0, 0x0) pkg/sentry/syscalls/linux/sys_thread.go:215 +0x125 fp=0xc00147d668 sp=0xc00147d578 pc=0x12165e5 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc001043908, 0x0?, {{0x24204400}, {0x40}, {0x0}, {0x0}, {0x0}, {0x7feafb6e86c0}}) pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0x4e fp=0xc00147d6c8 sp=0xc00147d668 pc=0x11a646e gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc001043908, 0x38, {{0x24204400}, {0x40}, {0x0}, {0x0}, {0x0}, {0x7feafb6e86c0}}) pkg/sentry/kernel/task_syscall.go:143 +0x995 fp=0xc00147d960 sp=0xc00147d6c8 pc=0xf51d95 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc001043908, 0x38, {{0x24204400}, {0x40}, {0x0}, {0x0}, {0x0}, {0x7feafb6e86c0}}) pkg/sentry/kernel/task_syscall.go:323 +0x72 fp=0xc00147da08 sp=0xc00147d960 pc=0xf53bf2 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc001043908, 0x38, {{0x24204400}, {0x40}, {0x0}, {0x0}, {0x0}, {0x7feafb6e86c0}}) pkg/sentry/kernel/task_syscall.go:283 +0x94 fp=0xc00147da78 sp=0xc00147da08 pc=0xf535f4 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc001043908) pkg/sentry/kernel/task_syscall.go:258 +0x4b0 fp=0xc00147db98 sp=0xc00147da78 pc=0xf53190 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc001043908?, 0xc001043908) pkg/sentry/kernel/task_run.go:269 +0x1fae fp=0xc00147de70 sp=0xc00147db98 pc=0xf3f2ae gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001043908, 0x119) pkg/sentry/kernel/task_run.go:97 +0x4fb fp=0xc00147dfb0 sp=0xc00147de70 pc=0xf3c91b gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1() pkg/sentry/kernel/task_start.go:400 +0x45 fp=0xc00147dfe0 sp=0xc00147dfb0 pc=0xf4fb65 runtime.goexit({}) src/runtime/asm_amd64.s:1700 +0x1 fp=0xc00147dfe8 sp=0xc00147dfe0 pc=0x4819a1 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1002 pkg/sentry/kernel/task_start.go:400 +0x165