panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xe00b50]

goroutine 93018 gp=0xc000a341e0 m=41 mp=0xc000644808 [running]:
panic({0x18a5ca0?, 0x2ac12e0?})
	GOROOT/src/runtime/panic.go:879 +0x15c fp=0xc001471170 sp=0xc0014710c0 pc=0x48a7dc
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:336
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:931 +0x2f0 fp=0xc0014711d0 sp=0xc001471170 pc=0x48d7d0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Debugf(0xc000f3c008, {0x1aec4ea, 0x15}, {0xc0015f4380, 0x1, 0x1})
	pkg/sentry/kernel/task_log.go:54 +0x60 fp=0xc001471230 sp=0xc0014711e0 pc=0xe00b50
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).sendSignalTimerLocked(0xc000f3c008, 0xc000e67400, 0x1, 0x0)
	pkg/sentry/kernel/task_signals.go:464 +0x5b8 fp=0xc001471330 sp=0xc001471230 pc=0xe0ad48
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).sendSignalLocked(...)
	pkg/sentry/kernel/task_signals.go:400
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).SendGroupSignal(0xc000f3c008, 0xc000e67400)
	pkg/sentry/kernel/task_signals.go:385 +0x9c fp=0xc0014713d0 sp=0xc001471330 pc=0xe0a46c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).PIDFDSendSignal(0xc00135ac88, 0xc0014eb100, 0x21, 0x0, 0x0)
	pkg/sentry/kernel/pidfd.go:390 +0x618 fp=0xc001471510 sp=0xc0014713d0 pc=0xdc7218
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.PIDFDSendSignal(0xc00135ac88, 0x495f58?, {{0xd}, {0x21}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_signal.go:567 +0x174 fp=0xc001471600 sp=0xc001471510 pc=0x1049c14
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00135ac88, 0x1a8, {{0xd}, {0x21}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0x6d0 fp=0xc001471950 sp=0xc001471600 pc=0xe14b60
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00135ac88, 0x1a8, {{0xd}, {0x21}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x50 fp=0xc001471a00 sp=0xc001471950 pc=0xe16230
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00135ac88, 0x1a8, {{0xd}, {0x21}, {0x0}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0x78 fp=0xc001471a70 sp=0xc001471a00 pc=0xe15d58
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc00135ac88)
	pkg/sentry/kernel/task_syscall.go:258 +0x3bc fp=0xc001471ba0 sp=0xc001471a70 pc=0xe159fc
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00135ac88?, 0xc00135ac88)
	pkg/sentry/kernel/task_run.go:258 +0x1554 fp=0xc001471e50 sp=0xc001471ba0 pc=0xe05394
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00135ac88, 0x75b1)
	pkg/sentry/kernel/task_run.go:89 +0x358 fp=0xc001471fa0 sp=0xc001471e50 pc=0xe03808
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:479 +0x38 fp=0xc001471fd0 sp=0xc001471fa0 pc=0xe13108
runtime.goexit({})
	src/runtime/asm_arm64.s:1447 +0x4 fp=0xc001471fd0 sp=0xc001471fd0 pc=0x4935a4
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 92997
	pkg/sentry/kernel/task_start.go:479 +0x138