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 657 gp=0xc0020c6380 m=31 mp=0xc00064b808 [running]:
panic({0x123d1c0?, 0x2209ba0?})
	GOROOT/src/runtime/panic.go:811 +0x168 fp=0xc000869570 sp=0xc0008694c0 pc=0x4788c8
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:262
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:925 +0x359 fp=0xc0008695d0 sp=0xc000869570 pc=0x47b319
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*DeviceFD).EventUnregister(0xc000869658?, 0x440438?)
	pkg/sentry/fsimpl/fuse/dev.go:160 +0x7d fp=0xc000869618 sp=0xc0008695d0 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(0xc001886588, {0xc001d3a000, 0x9, 0xc0020c6380?})
	pkg/sentry/syscalls/linux/sys_poll.go:94 +0x65 fp=0xc000869668 sp=0xc000869618 pc=0xc37305
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.pollBlock.deferwrap1()
	pkg/sentry/syscalls/linux/sys_poll.go:116 +0x2c fp=0xc000869698 sp=0xc000869668 pc=0xc37c4c
panic({0x123d1c0?, 0x2209ba0?})
	GOROOT/src/runtime/panic.go:792 +0x132 fp=0xc000869748 sp=0xc000869698 pc=0x478892
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:262
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:925 +0x359 fp=0xc0008697a8 sp=0xc000869748 pc=0x47b319
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*DeviceFD).EventRegister(0xc001a4b740?, 0x3?)
	pkg/sentry/fsimpl/fuse/dev.go:152 +0x83 fp=0xc000869800 sp=0xc0008697a8 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(0xc001886588, 0xc001efa320, 0xc001d3a000, 0xc0018d45b0)
	pkg/sentry/syscalls/linux/sys_poll.go:80 +0xea fp=0xc000869868 sp=0xc000869800 pc=0xc36d8a
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.pollBlock(0xc001886588, {0xc001efa320, 0x9, 0x8?}, 0x989680)
	pkg/sentry/syscalls/linux/sys_poll.go:119 +0x1b3 fp=0xc000869950 sp=0xc000869868 pc=0xc37893
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.doPoll(0xc001886588, 0x2000000020c0, 0x9, 0x989680)
	pkg/sentry/syscalls/linux/sys_poll.go:194 +0xa5 fp=0xc0008699d0 sp=0xc000869950 pc=0xc37e45
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Ppoll(0xc001886588, 0x49f2f9?, {{0x2000000020c0}, {0x9}, {0x200000002140}, {0x200000002180}, {0x8}, {0x0}})
	pkg/sentry/syscalls/linux/sys_poll.go:459 +0xe5 fp=0xc000869a78 sp=0xc0008699d0 pc=0xc39285
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc001886588, 0x10f, {{0x2000000020c0}, {0x9}, {0x200000002140}, {0x200000002180}, {0x8}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0x655 fp=0xc000869ca8 sp=0xc000869a78 pc=0xaa0a95
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc001886588, 0x10f, {{0x2000000020c0}, {0x9}, {0x200000002140}, {0x200000002180}, {0x8}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x45 fp=0xc000869d00 sp=0xc000869ca8 pc=0xaa1be5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc001886588, 0x10f, {{0x2000000020c0}, {0x9}, {0x200000002140}, {0x200000002180}, {0x8}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0x65 fp=0xc000869d50 sp=0xc000869d00 pc=0xaa1905
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc001618270?)
	pkg/sentry/kernel/task_syscall.go:258 +0x2a5 fp=0xc000869e28 sp=0xc000869d50 pc=0xaa1685
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc001ae2090?, 0xc001886588)
	pkg/sentry/kernel/task_run.go:269 +0xebc fp=0xc000869f30 sp=0xc000869e28 pc=0xa9745c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc001886588, 0x65)
	pkg/sentry/kernel/task_run.go:97 +0x214 fp=0xc000869fc0 sp=0xc000869f30 pc=0xa95f34
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:416 +0x25 fp=0xc000869fe0 sp=0xc000869fc0 pc=0xa9f4e5
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc000869fe8 sp=0xc000869fe0 pc=0x4816e1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 626
	pkg/sentry/kernel/task_start.go:416 +0xc5