panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xfe74d3] goroutine 1771 gp=0xc001380e00 m=23 mp=0xc001408708 [running]: panic({0x1c598a0?, 0x2c2cca0?}) bazel-out/k8-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x168 fp=0xc000814d60 sp=0xc000814cb0 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=0xc000814dc0 sp=0xc000814d60 pc=0x47adf9 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).SendGroupSignal(0x0, 0xc000ba0a00) pkg/sentry/kernel/task_signals.go:385 +0x53 fp=0xc000814e50 sp=0xc000814dc0 pc=0xfe74d3 gvisor.dev/gvisor/pkg/sentry/kernel.(*rlimitCPUSoftListener).NotifyTimer(0xc0016797b0, 0xc001679770?) pkg/sentry/kernel/task_acct.go:151 +0xea fp=0xc000814e80 sp=0xc000814e50 pc=0xfb2a2a gvisor.dev/gvisor/pkg/sentry/ktime.(*SyntheticTimer).Set(0xc001679770, {0x0?, {0x0?}, 0xc001ea40e0?}, 0x0) pkg/sentry/ktime/synthetic_timer.go:139 +0x342 fp=0xc000814f58 sp=0xc000814e80 pc=0xb71562 gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).notifyRlimitCPUUpdated(0xc001679008, 0x0) pkg/sentry/kernel/task_acct.go:103 +0x18a fp=0xc000815000 sp=0xc000814f58 pc=0xfb250a gvisor.dev/gvisor/pkg/sentry/kernel.(*Kernel).NewThreadGroup(0xc0001fd008, 0xc0006dad90, 0xc00092d1f0, 0x0, 0xc00092d210) pkg/sentry/kernel/thread_group.go:308 +0x709 fp=0xc000815078 sp=0xc000815000 pc=0xffdd49 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0xc000d29908, 0xc0008155a0) pkg/sentry/kernel/task_clone.go:238 +0x217a fp=0xc000815580 sp=0xc000815078 pc=0xfbb5ba gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0xc000d29908, 0x0, 0x0, 0x0, 0x0, 0x0) pkg/sentry/syscalls/linux/sys_thread.go:215 +0x130 fp=0xc000815670 sp=0xc000815580 pc=0x12c7050 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0xc000d29908, 0xca?, {{0x0}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/syscalls/linux/sys_clone_amd64.go:36 +0xef fp=0xc0008156e8 sp=0xc000815670 pc=0x126332f gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000d29908, 0x38, {{0x0}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:143 +0xb9f fp=0xc000815998 sp=0xc0008156e8 pc=0xff463f gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000d29908, 0x38, {{0x0}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:323 +0x85 fp=0xc000815a40 sp=0xc000815998 pc=0xff6765 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000d29908, 0x38, {{0x0}, {0x0}, {0x0}, {0x0}, {0x0}, {0x0}}) pkg/sentry/kernel/task_syscall.go:283 +0xc7 fp=0xc000815ab0 sp=0xc000815a40 pc=0xff6087 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000d29908) pkg/sentry/kernel/task_syscall.go:258 +0x54a fp=0xc000815bd0 sp=0xc000815ab0 pc=0xff5bea gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000d29908?, 0xc000d29908) pkg/sentry/kernel/task_run.go:269 +0x2295 fp=0xc000815e78 sp=0xc000815bd0 pc=0xfe0675 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000d29908, 0x47) pkg/sentry/kernel/task_run.go:97 +0x41b fp=0xc000815fb0 sp=0xc000815e78 pc=0xfdd99b gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1() pkg/sentry/kernel/task_start.go:400 +0x45 fp=0xc000815fe0 sp=0xc000815fb0 pc=0xff1f45 runtime.goexit({}) src/runtime/asm_amd64.s:1700 +0x1 fp=0xc000815fe8 sp=0xc000815fe0 pc=0x4819a1 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 1451 pkg/sentry/kernel/task_start.go:400 +0x185