panic: interface conversion: kernfs.Inode is nil, not *mqfs.rootInode

goroutine 954318 [running]:
panic(0x112cf40, 0xc010b06ba0)
	GOROOT/src/runtime/panic.go:1065 +0x565 fp=0xc015c9f858 sp=0xc015c9f790 pc=0x437c65
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:261
runtime.panicdottypeI(0x0, 0x12c5a80, 0x1217d40)
	GOROOT/src/runtime/iface.go:271 +0xcc fp=0xc015c9f880 sp=0xc015c9f858 pc=0x40b2ec
gvisor.dev/gvisor/pkg/sentry/fsimpl/mqfs.(*RegistryImpl).lookup(0xc0005c66f0, 0x1476ce0, 0xc007bb1500, 0xc00df95300, 0x2, 0xc015c9f92f, 0xffffffffffffffff, 0xc00ec45000, 0x1476ce0)
	pkg/sentry/fsimpl/mqfs/registry.go:138 +0x10d fp=0xc015c9f8d8 sp=0xc015c9f880 pc=0x86e88d
gvisor.dev/gvisor/pkg/sentry/fsimpl/mqfs.(*RegistryImpl).Get(0xc0005c66f0, 0x1476ce0, 0xc007bb1500, 0xc00df95300, 0x2, 0x0, 0x80015c9f901, 0x593258, 0xc007bb1500, 0x200000c0, ...)
	pkg/sentry/fsimpl/mqfs/registry.go:85 +0x5a fp=0xc015c9f938 sp=0xc015c9f8d8 pc=0x86e0da
gvisor.dev/gvisor/pkg/sentry/kernel/mq.(*Registry).FindOrCreate(0xc000c2a2c0, 0x1476ce0, 0xc007bb1500, 0xc00df95300, 0x2, 0x0, 0x10001, 0x18, 0xc015c9fa60, 0x0, ...)
	pkg/sentry/kernel/mq/mq.go:165 +0x1f4 fp=0xc015c9f9e0 sp=0xc015c9f938 pc=0x869014
gvisor.dev/gvisor/pkg/sentry/syscalls/linux/vfs2.MqOpen(0xc007bb1500, 0x20000080, 0x40, 0x18, 0x200000c0, 0x0, 0x0, 0xeb36e, 0xc015c9fbe4, 0x40000002, ...)
	pkg/sentry/syscalls/linux/vfs2/mq.go:56 +0x1ce fp=0xc015c9fb00 sp=0xc015c9f9e0 pc=0xe3ad8e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc007bb1500, 0xf0, 0x20000080, 0x40, 0x18, 0x200000c0, 0x0, 0x0, 0x0, 0x12d7840, ...)
	pkg/sentry/kernel/task_syscall.go:103 +0x13c fp=0xc015c9fc60 sp=0xc015c9fb00 pc=0x9d7cfc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc007bb1500, 0xf0, 0x20000080, 0x40, 0x18, 0x200000c0, 0x0, 0x0, 0x0, 0x0)
	pkg/sentry/kernel/task_syscall.go:238 +0x66 fp=0xc015c9fce8 sp=0xc015c9fc60 pc=0x9d8e86
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc007bb1500, 0xf0, 0x20000080, 0x40, 0x18, 0x200000c0, 0x0, 0x0, 0xc010be6fa0, 0xc010be6f00)
	pkg/sentry/kernel/task_syscall.go:198 +0x98 fp=0xc015c9fd48 sp=0xc015c9fce8 pc=0x9d8a78
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc007bb1500, 0x2, 0xc007bb1500)
	pkg/sentry/kernel/task_syscall.go:173 +0x15c fp=0xc015c9fe18 sp=0xc015c9fd48 pc=0x9d841c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x0, 0xc007bb1500, 0x144a900, 0x0)
	pkg/sentry/kernel/task_run.go:282 +0xc8c fp=0xc015c9ff60 sp=0xc015c9fe18 pc=0x9cd0ac
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc007bb1500, 0xc9cf)
	pkg/sentry/kernel/task_run.go:97 +0x1af fp=0xc015c9ffd0 sp=0xc015c9ff60 pc=0x9cbd2f
runtime.goexit()
	src/runtime/asm_amd64.s:1371 +0x1 fp=0xc015c9ffd8 sp=0xc015c9ffd0 pc=0x472861
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:327 +0xfe