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

goroutine 307 [running]:
panic({0x104fae0, 0xc0006f49c0})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc0009ad3d0 sp=0xc0009ad310 pc=0x436c9b
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0x7fad2a0905c0?, 0x119e6e0, 0x10996a0)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc0009ad3f8 sp=0xc0009ad3d0 pc=0x40b45c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).MkdirAt(0xc00039e320, {0x13e6640, 0xc0007fca80}, 0xc000482000, {0xae80?, 0x7c?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:412 +0x6be fp=0xc0009ad618 sp=0xc0009ad3f8 pc=0x7bb03e
gvisor.dev/gvisor/pkg/sentry/fsimpl/sys.(*filesystem).MkdirAt(0xc000532c60?, {0x13e6640?, 0xc0007fca80?}, 0xc000482000?, {0x0?, 0x0?})
	<autogenerated>:1 +0x2e fp=0xc0009ad650 sp=0xc0009ad618 pc=0xdfb0ee
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MkdirAt(0xc00039e0a0?, {0x13e6640, 0xc0007fca80}, 0xc000a07400?, 0xc0009a4600?, 0xc0009ad744)
	pkg/sentry/vfs/vfs.go:367 +0x12b fp=0xc0009ad6b0 sp=0xc0009ad650 pc=0x75f66b
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.mkdirat(0xc0007fca80, 0x4?, 0xc0007f0100?, 0x1ff)
	pkg/sentry/syscalls/linux/sys_file.go:947 +0x225 fp=0xc0009ad838 sp=0xc0009ad6b0 pc=0xa82d85
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mkdirat(0xc0007fca80?, 0x0?, {{0xffffff9c}, {0x7eee2e56b5c0}, {0x1ff}, {0x0}, {0x3}, {0x7eee2e56b2d7}})
	pkg/sentry/syscalls/linux/sys_file.go:934 +0x28 fp=0xc0009ad868 sp=0xc0009ad838 pc=0xa82b28
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0007fca80, 0x102, {{0xffffff9c}, {0x7eee2e56b5c0}, {0x1ff}, {0x0}, {0x3}, {0x7eee2e56b2d7}})
	pkg/sentry/kernel/task_syscall.go:142 +0x755 fp=0xc0009adc58 sp=0xc0009ad868 pc=0x94d435
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0007fca80, 0xc000544600?, {{0xffffff9c}, {0x7eee2e56b5c0}, {0x1ff}, {0x0}, {0x3}, {0x7eee2e56b2d7}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4a fp=0xc0009adcb8 sp=0xc0009adc58 pc=0x94e66a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0009ade00?, 0xc83d99?, {{0xffffff9c}, {0x7eee2e56b5c0}, {0x1ff}, {0x0}, {0x3}, {0x7eee2e56b2d7}})
	pkg/sentry/kernel/task_syscall.go:282 +0x65 fp=0xc0009add18 sp=0xc0009adcb8 pc=0x94e345
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0003fc270?)
	pkg/sentry/kernel/task_syscall.go:257 +0x2f0 fp=0xc0009ade10 sp=0xc0009add18 pc=0x94e0b0
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000676480?, 0xc0007fca80)
	pkg/sentry/kernel/task_run.go:269 +0x101e fp=0xc0009adf48 sp=0xc0009ade10 pc=0x94215e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0007fca80, 0x18)
	pkg/sentry/kernel/task_run.go:98 +0x1f8 fp=0xc0009adfc0 sp=0xc0009adf48 pc=0x940a98
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:390 +0x2a fp=0xc0009adfe0 sp=0xc0009adfc0 pc=0x94bc2a
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc0009adfe8 sp=0xc0009adfe0 pc=0x46d6a1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:390 +0xef