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 7919 gp=0xc001735dc0 m=24 mp=0xc001dc2808 [running]:
panic({0x123d1c0?, 0x2209ba0?})
	GOROOT/src/runtime/panic.go:811 +0x168 fp=0xc0013a1578 sp=0xc0013a14c8 pc=0x4788c8
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:262
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:925 +0x359 fp=0xc0013a15d8 sp=0xc0013a1578 pc=0x47b319
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*DeviceFD).EventUnregister(0xc0013a1660?, 0x440438?)
	pkg/sentry/fsimpl/fuse/dev.go:160 +0x7d fp=0xc0013a1620 sp=0xc0013a15d8 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(0xc000c72588, {0xc0007ce360, 0x6, 0xc001735dc0?})
	pkg/sentry/syscalls/linux/sys_poll.go:94 +0x65 fp=0xc0013a1670 sp=0xc0013a1620 pc=0xc37305
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.pollBlock.deferwrap1()
	pkg/sentry/syscalls/linux/sys_poll.go:116 +0x2c fp=0xc0013a16a0 sp=0xc0013a1670 pc=0xc37c4c
panic({0x123d1c0?, 0x2209ba0?})
	GOROOT/src/runtime/panic.go:792 +0x132 fp=0xc0013a1750 sp=0xc0013a16a0 pc=0x478892
runtime.panicmem(...)
	GOROOT/src/runtime/panic.go:262
runtime.sigpanic()
	GOROOT/src/runtime/signal_unix.go:925 +0x359 fp=0xc0013a17b0 sp=0xc0013a1750 pc=0x47b319
gvisor.dev/gvisor/pkg/sentry/fsimpl/fuse.(*DeviceFD).EventRegister(0xc002208840?, 0x3?)
	pkg/sentry/fsimpl/fuse/dev.go:152 +0x83 fp=0xc0013a1808 sp=0xc0013a17b0 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(0xc000c72588, 0xc0020862b8, 0xc0007ce3f0, 0xc00067ff80)
	pkg/sentry/syscalls/linux/sys_poll.go:80 +0xea fp=0xc0013a1870 sp=0xc0013a1808 pc=0xc36d8a
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.pollBlock(0xc000c72588, {0xc0020862a0, 0x6, 0xc0013a19d8?}, 0x3d0900)
	pkg/sentry/syscalls/linux/sys_poll.go:119 +0x1b3 fp=0xc0013a1958 sp=0xc0013a1870 pc=0xc37893
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.doPoll(0xc000c72588, 0x2000000001c0, 0x6, 0x3d0900)
	pkg/sentry/syscalls/linux/sys_poll.go:194 +0xa5 fp=0xc0013a19d8 sp=0xc0013a1958 pc=0xc37e45
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.poll(0xc000c72588, 0x2000000001c0, 0x6, 0x0?)
	pkg/sentry/syscalls/linux/sys_poll.go:415 +0x29 fp=0xc0013a1a48 sp=0xc0013a19d8 pc=0xc38f89
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Poll(0xc000c72588?, 0xc0013a1b20?, {{0x2000000001c0}, {0x6}, {0x4}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/syscalls/linux/sys_poll.go:433 +0x28 fp=0xc0013a1a78 sp=0xc0013a1a48 pc=0xc39168
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000c72588, 0x7, {{0x2000000001c0}, {0x6}, {0x4}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:143 +0x655 fp=0xc0013a1ca8 sp=0xc0013a1a78 pc=0xaa0a95
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000c72588, 0x7, {{0x2000000001c0}, {0x6}, {0x4}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:323 +0x45 fp=0xc0013a1d00 sp=0xc0013a1ca8 pc=0xaa1be5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000c72588, 0x7, {{0x2000000001c0}, {0x6}, {0x4}, {0x0}, {0x0}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:283 +0x65 fp=0xc0013a1d50 sp=0xc0013a1d00 pc=0xaa1905
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0007fad10?)
	pkg/sentry/kernel/task_syscall.go:258 +0x2a5 fp=0xc0013a1e28 sp=0xc0013a1d50 pc=0xaa1685
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc002476c60?, 0xc000c72588)
	pkg/sentry/kernel/task_run.go:269 +0xebc fp=0xc0013a1f30 sp=0xc0013a1e28 pc=0xa9745c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000c72588, 0xa02)
	pkg/sentry/kernel/task_run.go:97 +0x214 fp=0xc0013a1fc0 sp=0xc0013a1f30 pc=0xa95f34
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.gowrap1()
	pkg/sentry/kernel/task_start.go:416 +0x25 fp=0xc0013a1fe0 sp=0xc0013a1fc0 pc=0xa9f4e5
runtime.goexit({})
	src/runtime/asm_amd64.s:1700 +0x1 fp=0xc0013a1fe8 sp=0xc0013a1fe0 pc=0x4816e1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start in goroutine 7965
	pkg/sentry/kernel/task_start.go:416 +0xc5