panic: runtime error: invalid memory address or nil pointer dereference
	panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0x0 pc=0xf567bd]

goroutine 5166 gp=0xc000bd7c00 m=35 mp=0xc000999008 [running]:
panic({0x123d1c0?, 0x2209ba0?})
	GOROOT/src/runtime/panic.go:811 +0x168 fp=0xc0028a9578 sp=0xc0028a94c8 pc=0x4788c8
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:262
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:925 +0x359 fp=0xc0028a95d8 sp=0xc0028a9578 pc=0x47b319
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*DeviceFD).EventUnregister(0xc0007ee660?, 0x440438?)
	pkg/sentry/fsimpl/fuse/dev.go:160 +0x7d fp=0xc0028a9620 sp=0xc0028a95d8 pc=0xf567bd
gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).EventUnregister(...)
	pkg/sentry/vfs/file_description.go:619
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.releaseState(0xc002a10008, {0xc001e9e9c0, 0x2, 0xc000bd7c00?})
	pkg/sentry/syscalls/linux/sys_poll.go:94 +0x65 fp=0xc0028a9670 sp=0xc0028a9620 pc=0xc37305
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.pollBlock.deferwrap1()
	pkg/sentry/syscalls/linux/sys_poll.go:116 +0x2c fp=0xc0028a96a0 sp=0xc0028a9670 pc=0xc37c4c
panic({0x123d1c0?, 0x2209ba0?})
	GOROOT/src/runtime/panic.go:792 +0x132 fp=0xc0028a9750 sp=0xc0028a96a0 pc=0x478892
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:262
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:925 +0x359 fp=0xc0028a97b0 sp=0xc0028a9750 pc=0x47b319
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*DeviceFD).EventRegister(0xc001c38b00?, 0x4?)
	pkg/sentry/fsimpl/fuse/dev.go:152 +0x83 fp=0xc0028a9808 sp=0xc0028a97b0 pc=0xf56663
gvisor.dev/gvisor/pkg/sentry/vfs.(*FileDescription).EventRegister(...)
	pkg/sentry/vfs/file_description.go:612
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.initReadiness(0xc002a10008, 0xc0024ba680, 0xc001e9e9c0, 0xc001eddc70)
	pkg/sentry/syscalls/linux/sys_poll.go:80 +0xea fp=0xc0028a9870 sp=0xc0028a9808 pc=0xc36d8a
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.pollBlock(0xc002a10008, {0xc0024ba680, 0x2, 0xc0007ee9d8?}, 0x7a02bdc0)
	pkg/sentry/syscalls/linux/sys_poll.go:119 +0x1b3 fp=0xc0028a9958 sp=0xc0028a9870 pc=0xc37893
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.doPoll(0xc002a10008, 0x200000004cc0, 0x2, 0x7a02bdc0)
	pkg/sentry/syscalls/linux/sys_poll.go:194 +0xa5 fp=0xc0028a99d8 sp=0xc0028a9958 pc=0xc37e45
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.poll(0xc002a10008, 0x200000004cc0, 0x2, 0xc0007eea40?)
	pkg/sentry/syscalls/linux/sys_poll.go:415 +0x29 fp=0xc0028a9a48 sp=0xc0028a99d8 pc=0xc38f89
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Poll(0xc002a10008?, 0x10?, {{0x200000004cc0}, {0x2}, {0x7ff}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_poll.go:433 +0x28 fp=0xc0028a9a78 sp=0xc0028a9a48 pc=0xc39168
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc002a10008, 0x7, {{0x200000004cc0}, {0x2}, {0x7ff}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0x655 fp=0xc0028a9ca8 sp=0xc0028a9a78 pc=0xaa0a95
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc002a10008, 0x7, {{0x200000004cc0}, {0x2}, {0x7ff}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x45 fp=0xc0028a9d00 sp=0xc0028a9ca8 pc=0xaa1be5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc002a10008, 0x7, {{0x200000004cc0}, {0x2}, {0x7ff}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0x65 fp=0xc0028a9d50 sp=0xc0028a9d00 pc=0xaa1905
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc002b96790?)
	pkg/sentry/kernel/task_syscall.go:258 +0x2a5 fp=0xc0028a9e28 sp=0xc0028a9d50 pc=0xaa1685
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00111cea0?, 0xc002a10008)
	pkg/sentry/kernel/task_run.go:269 +0xebc fp=0xc0028a9f30 sp=0xc0028a9e28 pc=0xa9745c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc002a10008, 0x5a4)
	pkg/sentry/kernel/task_run.go:97 +0x214 fp=0xc0028a9fc0 sp=0xc0028a9f30 pc=0xa95f34
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:416 +0x25 fp=0xc0028a9fe0 sp=0xc0028a9fc0 pc=0xa9f4e5
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc0028a9fe8 sp=0xc0028a9fe0 pc=0x4816e1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 5165
	pkg/sentry/kernel/task_start.go:416 +0xc5