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

goroutine 149 [running]:
panic({0x104fae0, 0xc000c305a0})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc0007d73d0 sp=0xc0007d7310 pc=0x436c9b
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0x3f3613cfa5c0?, 0x119e6e0, 0x10996a0)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc0007d73f8 sp=0xc0007d73d0 pc=0x40b45c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).MkdirAt(0xc000164500, {0x13e6640, 0xc000454a80}, 0xc000472000, {0x8d40?, 0x1a?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:412 +0x6be fp=0xc0007d7618 sp=0xc0007d73f8 pc=0x7bb03e
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).MkdirAt(0xc0002fa1e0?, {0x13e6640?, 0xc000454a80?}, 0xc000472000?, {0x0?, 0x0?})
	<autogenerated>:1 +0x2e fp=0xc0007d7650 sp=0xc0007d7618 pc=0xb6ce2e
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MkdirAt(0xc000b9a1e0?, {0x13e6640, 0xc000454a80}, 0xc000503000?, 0xc0003aac00?, 0xc0007d7744)
	pkg/sentry/vfs/vfs.go:367 +0x12b fp=0xc0007d76b0 sp=0xc0007d7650 pc=0x75f66b
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.mkdirat(0xc000454a80, 0x4?, 0xc000450100?, 0x1ff)
	pkg/sentry/syscalls/linux/sys_file.go:947 +0x225 fp=0xc0007d7838 sp=0xc0007d76b0 pc=0xa82d85
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mkdirat(0xc000454a80?, 0x0?, {{0xffffff9c}, {0x7f86449685c0}, {0x1ff}, {0x0}, {0x3}, {0x7f86449682d7}})
	pkg/sentry/syscalls/linux/sys_file.go:934 +0x28 fp=0xc0007d7868 sp=0xc0007d7838 pc=0xa82b28
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000454a80, 0x102, {{0xffffff9c}, {0x7f86449685c0}, {0x1ff}, {0x0}, {0x3}, {0x7f86449682d7}})
	pkg/sentry/kernel/task_syscall.go:142 +0x755 fp=0xc0007d7c58 sp=0xc0007d7868 pc=0x94d435
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000454a80, 0x0?, {{0xffffff9c}, {0x7f86449685c0}, {0x1ff}, {0x0}, {0x3}, {0x7f86449682d7}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4a fp=0xc0007d7cb8 sp=0xc0007d7c58 pc=0x94e66a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000350fc0?, 0xc0007d7e00?, {{0xffffff9c}, {0x7f86449685c0}, {0x1ff}, {0x0}, {0x3}, {0x7f86449682d7}})
	pkg/sentry/kernel/task_syscall.go:282 +0x65 fp=0xc0007d7d18 sp=0xc0007d7cb8 pc=0x94e345
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0004d40b0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x2f0 fp=0xc0007d7e10 sp=0xc0007d7d18 pc=0x94e0b0
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0000e6a00?, 0xc000454a80)
	pkg/sentry/kernel/task_run.go:269 +0x101e fp=0xc0007d7f48 sp=0xc0007d7e10 pc=0x94215e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000454a80, 0x1a)
	pkg/sentry/kernel/task_run.go:98 +0x1f8 fp=0xc0007d7fc0 sp=0xc0007d7f48 pc=0x940a98
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:390 +0x2a fp=0xc0007d7fe0 sp=0xc0007d7fc0 pc=0x94bc2a
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc0007d7fe8 sp=0xc0007d7fe0 pc=0x46d6a1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:390 +0xef