panic: interface conversion: vfs.DentryImpl is *tmpfs.dentry, not *kernfs.Dentry

goroutine 236 [running]:
panic({0x315f60, 0xc0007174d0})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc0009daf10 sp=0xc0009dae50 pc=0x11de9db
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0xc0003c18b0?, 0x46b9c0, 0x360b40)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc0009daf38 sp=0xc0009daf10 pc=0x11b2d3c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).MkdirAt(0xc0003c1860, {0x7bade0, 0xc0009fd500}, 0xc000873200, {0xb3a8?, 0x9d?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:412 +0x885 fp=0xc0009db190 sp=0xc0009daf38 pc=0x17e4a25
gvisor.dev/gvisor/pkg/sentry/fsimpl/devpts.(*filesystem).MkdirAt(0xc0003c1860, {0x7bade0, 0xc0009fd500}, 0xc000873200?, {0x0?, 0x0?})
	<autogenerated>:1 +0x77 fp=0xc0009db1e8 sp=0xc0009db190 pc=0x208f5f7
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MkdirAt(0xc0007a5180?, {0x7bade0, 0xc0009fd500}, 0xc00040f400?, 0xc0009db388, 0xc0009db2fc)
	pkg/sentry/vfs/vfs.go:367 +0x29f fp=0xc0009db270 sp=0xc0009db1e8 pc=0x174429f
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.mkdirat(0xc0009fd500, 0x121ac37?, 0x101a6f878?, 0x1ff)
	pkg/sentry/syscalls/linux/sys_file.go:947 +0x274 fp=0xc0009db438 sp=0xc0009db270 pc=0x1c68ab4
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mkdirat(0xc0009fd500?, 0x23f6560?, {{0xffffff9c}, {0x7efc63b395c0}, {0x1ff}, {0x0}, {0x3}, {0x7efc63b392d7}})
	pkg/sentry/syscalls/linux/sys_file.go:934 +0x3e fp=0xc0009db480 sp=0xc0009db438 pc=0x1c687de
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0009fd500, 0x102, {{0xffffff9c}, {0x7efc63b395c0}, {0x1ff}, {0x0}, {0x3}, {0x7efc63b392d7}})
	pkg/sentry/kernel/task_syscall.go:142 +0x9c2 fp=0xc0009db960 sp=0xc0009db480 pc=0x1a701a2
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0009fd500, 0x1228b3a?, {{0xffffff9c}, {0x7efc63b395c0}, {0x1ff}, {0x0}, {0x3}, {0x7efc63b392d7}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc0009db9f8 sp=0xc0009db960 pc=0x1a71f9d
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x0?, 0x0?, {{0xffffff9c}, {0x7efc63b395c0}, {0x1ff}, {0x0}, {0x3}, {0x7efc63b392d7}})
	pkg/sentry/kernel/task_syscall.go:282 +0x8f fp=0xc0009dba70 sp=0xc0009db9f8 pc=0x1a7194f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0009fd500)
	pkg/sentry/kernel/task_syscall.go:257 +0x4c5 fp=0xc0009dbb98 sp=0xc0009dba70 pc=0x1a714e5
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0009fd500?, 0xc0009fd500)
	pkg/sentry/kernel/task_run.go:269 +0x1d4b fp=0xc0009dbe70 sp=0xc0009dbb98 pc=0x1a5baeb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0009fd500, 0x16)
	pkg/sentry/kernel/task_run.go:98 +0x41b fp=0xc0009dbfb0 sp=0xc0009dbe70 pc=0x1a5937b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:390 +0x48 fp=0xc0009dbfe0 sp=0xc0009dbfb0 pc=0x1a6dca8
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc0009dbfe8 sp=0xc0009dbfe0 pc=0x12178c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:390 +0x1ad