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

goroutine 197 [running]:
panic({0x316000, 0xc00098e9c0})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc000b66f90 sp=0xc000b66ed0 pc=0x114aadb
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0xc0005e7130?, 0x46bee0, 0x360ce0)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc000b66fb8 sp=0xc000b66f90 pc=0x111ee3c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).MkdirAt(0xc0005e70e0, {0x6f3240, 0xc000bf3500}, 0xc0009e5680, {0x562c?, 0x18?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:412 +0x94a fp=0xc000b67210 sp=0xc000b66fb8 pc=0x17b092a
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).MkdirAt(0xc0005e70e0, {0x6f3240, 0xc000bf3500}, 0xc0009e5680?, {0x12?, 0x0?})
	<autogenerated>:1 +0x77 fp=0xc000b67268 sp=0xc000b67210 pc=0x1e21f97
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MkdirAt(0xc000979a80?, {0x6f3240, 0xc000bf3500}, 0xc000a53800?, 0xc000b67440, 0xc000b6738c)
	pkg/sentry/vfs/vfs.go:367 +0x37f fp=0xc000b672f8 sp=0xc000b67268 pc=0x16f877f
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.mkdirat(0xc000bf3500, 0x118725b?, 0x263907c?, 0x1ff)
	pkg/sentry/syscalls/linux/sys_file.go:947 +0x328 fp=0xc000b674f0 sp=0xc000b672f8 pc=0x1caeca8
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mkdirat(0x0?, 0xc000b675d0?, {{0xffffff9c}, {0x7fab6f8da5c0}, {0x1ff}, {0x0}, {0x3}, {0x7fab6f8da2d7}})
	pkg/sentry/syscalls/linux/sys_file.go:934 +0xa5 fp=0xc000b67550 sp=0xc000b674f0 pc=0x1cae925
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000bf3500, 0x102, {{0xffffff9c}, {0x7fab6f8da5c0}, {0x1ff}, {0x0}, {0x3}, {0x7fab6f8da2d7}})
	pkg/sentry/kernel/task_syscall.go:142 +0xabf fp=0xc000b67968 sp=0xc000b67550 pc=0x1a873ff
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000bf3500, 0x1?, {{0xffffff9c}, {0x7fab6f8da5c0}, {0x1ff}, {0x0}, {0x3}, {0x7fab6f8da2d7}})
	pkg/sentry/kernel/task_syscall.go:322 +0x8e fp=0xc000b67a08 sp=0xc000b67968 pc=0x1a8950e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000a201e0?, 0xc000b67b37?, {{0xffffff9c}, {0x7fab6f8da5c0}, {0x1ff}, {0x0}, {0x3}, {0x7fab6f8da2d7}})
	pkg/sentry/kernel/task_syscall.go:282 +0xc5 fp=0xc000b67a80 sp=0xc000b67a08 pc=0x1a88e05
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000bf3500)
	pkg/sentry/kernel/task_syscall.go:257 +0x53b fp=0xc000b67ba8 sp=0xc000b67a80 pc=0x1a8891b
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000bf3500?, 0xc000bf3500)
	pkg/sentry/kernel/task_run.go:269 +0x22b4 fp=0xc000b67e68 sp=0xc000b67ba8 pc=0x1a71294
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000bf3500, 0x16)
	pkg/sentry/kernel/task_run.go:98 +0x35b fp=0xc000b67fb0 sp=0xc000b67e68 pc=0x1a6e57b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:390 +0x48 fp=0xc000b67fe0 sp=0xc000b67fb0 pc=0x1a84ae8
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc000b67fe8 sp=0xc000b67fe0 pc=0x11839c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:390 +0x1da