panic: runtime error: invalid memory address or nil pointer dereference [signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0x6d7d08] goroutine 173 gp=0x4000362540 m=11 mp=0x4000880008 [running]: panic({0xdd9280?, 0x1e9d520?}) bazel-out/aarch64-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:804 +0x154 fp=0x40005d3310 sp=0x40005d3260 pc=0x84234 runtime.panicmem(...) bazel-out/aarch64-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/panic.go:262 runtime.sigpanic() bazel-out/aarch64-fastbuild/bin/external/io_bazel_rules_go/stdlib_/src/runtime/signal_unix.go:900 +0x300 fp=0x40005d3370 sp=0x40005d3310 pc=0x86a40 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).SendGroupSignal(0x0, 0x400080d880) pkg/sentry/kernel/task_signals.go:385 +0x38 fp=0x40005d33e0 sp=0x40005d3380 pc=0x6d7d08 gvisor.dev/gvisor/pkg/sentry/kernel.(*rlimitCPUSoftListener).NotifyTimer(0x1?, 0x4000222f70?) pkg/sentry/kernel/task_acct.go:151 +0x68 fp=0x40005d3410 sp=0x40005d33e0 pc=0x6b9858 gvisor.dev/gvisor/pkg/sentry/ktime.(*SyntheticTimer).Set(0x4000222f70, {0x0?, {0x40005d3528?}, 0x6e3c70?}, 0x0) pkg/sentry/ktime/synthetic_timer.go:139 +0x224 fp=0x40005d34b0 sp=0x40005d3410 pc=0x43f0b4 gvisor.dev/gvisor/pkg/sentry/kernel.(*ThreadGroup).notifyRlimitCPUUpdated(0x4000222808, 0x0) pkg/sentry/kernel/task_acct.go:103 +0x130 fp=0x40005d3530 sp=0x40005d34b0 pc=0x6b9500 gvisor.dev/gvisor/pkg/sentry/kernel.(*Kernel).NewThreadGroup(0x40001cb008, 0x4000933a40, 0x40005cc9f0, 0x0, 0x40005cca00) pkg/sentry/kernel/thread_group.go:308 +0x328 fp=0x40005d3580 sp=0x40005d3530 pc=0x6e3e28 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Clone(0x4000348c88, 0x40005d3938) pkg/sentry/kernel/task_clone.go:238 +0x1030 fp=0x40005d3920 sp=0x40005d3580 pc=0x6beb20 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.clone(0x4000302b74?, 0x0?, 0x4000302a68?, 0xab35c?, 0x4000362540?, 0x200000003?) pkg/sentry/syscalls/linux/sys_thread.go:215 +0x90 fp=0x40005d39f0 sp=0x40005d3920 pc=0x8962a0 gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Clone(0x4000302ab8?, 0x14e148?, {{0x24204400}, {0x40}, {0x0}, {0x0}, {0x0}, {0xf60df94315f0}}) pkg/sentry/syscalls/linux/sys_clone_arm64.go:36 +0x68 fp=0x40005d3a30 sp=0x40005d39f0 pc=0x85f488 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0x4000348c88, 0xdc, {{0x24204400}, {0x40}, {0x0}, {0x0}, {0x0}, {0xf60df94315f0}}) pkg/sentry/kernel/task_syscall.go:143 +0x664 fp=0x40005d3c60 sp=0x40005d3a30 pc=0x6dec34 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0x4000348c88, 0xdc, {{0x24204400}, {0x40}, {0x0}, {0x0}, {0x0}, {0xf60df94315f0}}) pkg/sentry/kernel/task_syscall.go:323 +0x48 fp=0x40005d3cc0 sp=0x40005d3c60 pc=0x6dfef8 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x4000348c88, 0xdc, {{0x24204400}, {0x40}, {0x0}, {0x0}, {0x0}, {0xf60df94315f0}}) pkg/sentry/kernel/task_syscall.go:283 +0x7c fp=0x40005d3d10 sp=0x40005d3cc0 pc=0x6dfabc gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0x400099d2b0?) pkg/sentry/kernel/task_syscall.go:258 +0x2e8 fp=0x40005d3df0 sp=0x40005d3d10 pc=0x6df7e8 gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x400022ae10?, 0x4000348c88) pkg/sentry/kernel/task_run.go:269 +0x10ac fp=0x40005d3f10 sp=0x40005d3df0 pc=0x6d3c4c gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0x4000348c88, 0x12) pkg/sentry/kernel/task_run.go:97 +0x250 fp=0x40005d3fb0 sp=0x40005d3f10 pc=0x6d24f0 gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1() pkg/sentry/kernel/task_start.go:400 +0x2c fp=0x40005d3fd0 sp=0x40005d3fb0 pc=0x6dd3fc runtime.goexit({}) src/runtime/asm_arm64.s:1223 +0x4 fp=0x40005d3fd0 sp=0x40005d3fd0 pc=0x8d484 created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 156 pkg/sentry/kernel/task_start.go:400 +0xd8