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 7477 gp=0xc001e6a380 m=22 mp=0xc00107e008 [running]:
panic({0x123d1c0?, 0x2209ba0?})
	GOROOT/src/runtime/panic.go:811 +0x168 fp=0xc00273d578 sp=0xc00273d4c8 pc=0x4788c8
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:262
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:925 +0x359 fp=0xc00273d5d8 sp=0xc00273d578 pc=0x47b319
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*DeviceFD).EventUnregister(0xc00273d660?, 0x440438?)
	pkg/sentry/fsimpl/fuse/dev.go:160 +0x7d fp=0xc00273d620 sp=0xc00273d5d8 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(0xc000833208, {0xc000a2f320, 0x3, 0xc001e6a380?})
	pkg/sentry/syscalls/linux/sys_poll.go:94 +0x65 fp=0xc00273d670 sp=0xc00273d620 pc=0xc37305
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.pollBlock.deferwrap1()
	pkg/sentry/syscalls/linux/sys_poll.go:116 +0x2c fp=0xc00273d6a0 sp=0xc00273d670 pc=0xc37c4c
panic({0x123d1c0?, 0x2209ba0?})
	GOROOT/src/runtime/panic.go:792 +0x132 fp=0xc00273d750 sp=0xc00273d6a0 pc=0x478892
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:262
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:925 +0x359 fp=0xc00273d7b0 sp=0xc00273d750 pc=0x47b319
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*DeviceFD).EventRegister(0xc000fb6300?, 0x3?)
	pkg/sentry/fsimpl/fuse/dev.go:152 +0x83 fp=0xc00273d808 sp=0xc00273d7b0 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(0xc000833208, 0xc00056c9f0, 0xc000a2f320, 0xc0020a3340)
	pkg/sentry/syscalls/linux/sys_poll.go:80 +0xea fp=0xc00273d870 sp=0xc00273d808 pc=0xc36d8a
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.pollBlock(0xc000833208, {0xc00056c9f0, 0x3, 0xc00273d9d8?}, 0x7a1200000)
	pkg/sentry/syscalls/linux/sys_poll.go:119 +0x1b3 fp=0xc00273d958 sp=0xc00273d870 pc=0xc37893
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.doPoll(0xc000833208, 0x200000000040, 0x3, 0x7a1200000)
	pkg/sentry/syscalls/linux/sys_poll.go:194 +0xa5 fp=0xc00273d9d8 sp=0xc00273d958 pc=0xc37e45
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.poll(0xc000833208, 0x200000000040, 0x3, 0x0?)
	pkg/sentry/syscalls/linux/sys_poll.go:415 +0x29 fp=0xc00273da48 sp=0xc00273d9d8 pc=0xc38f89
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Poll(0xc000833208?, 0xc00273db20?, {{0x200000000040}, {0x3}, {0x8000}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_poll.go:433 +0x28 fp=0xc00273da78 sp=0xc00273da48 pc=0xc39168
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000833208, 0x7, {{0x200000000040}, {0x3}, {0x8000}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0x655 fp=0xc00273dca8 sp=0xc00273da78 pc=0xaa0a95
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000833208, 0x7, {{0x200000000040}, {0x3}, {0x8000}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x45 fp=0xc00273dd00 sp=0xc00273dca8 pc=0xaa1be5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000833208, 0x7, {{0x200000000040}, {0x3}, {0x8000}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0x65 fp=0xc00273dd50 sp=0xc00273dd00 pc=0xaa1905
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0008364d0?)
	pkg/sentry/kernel/task_syscall.go:258 +0x2a5 fp=0xc00273de28 sp=0xc00273dd50 pc=0xaa1685
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0025b2240?, 0xc000833208)
	pkg/sentry/kernel/task_run.go:269 +0xebc fp=0xc00273df30 sp=0xc00273de28 pc=0xa9745c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000833208, 0x86d)
	pkg/sentry/kernel/task_run.go:97 +0x214 fp=0xc00273dfc0 sp=0xc00273df30 pc=0xa95f34
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:416 +0x25 fp=0xc00273dfe0 sp=0xc00273dfc0 pc=0xa9f4e5
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc00273dfe8 sp=0xc00273dfe0 pc=0x4816e1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 7475
	pkg/sentry/kernel/task_start.go:416 +0xc5