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

goroutine 324 [running]:
panic({0x1167ac0, 0xc000876420})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc00087f470 sp=0xc00087f3b0 pc=0x436abb
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0xc00087f4b0?, 0x12b6640, 0x11b1600)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc00087f498 sp=0xc00087f470 pc=0x40b45c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).MkdirAt(0xc000678960, {0x15350c0, 0xc000b20a80}, 0xc00048c900, {0x37c0?, 0x53?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:412 +0x805 fp=0xc00087f6c8 sp=0xc00087f498 pc=0x806b25
gvisor.dev/gvisor/pkg/sentry/fsimpl/devpts.(*filesystem).MkdirAt(0xc0003ac8e0?, {0x15350c0?, 0xc000b20a80?}, 0xc00048c900?, {0x0?, 0x0?})
	<autogenerated>:1 +0x2e fp=0xc00087f700 sp=0xc00087f6c8 pc=0xe1f4ae
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MkdirAt(0xc0005337c0?, {0x15350c0, 0xc000b20a80}, 0xc00078f400?, 0xc000705700?, 0xc00087f7f4)
	pkg/sentry/vfs/vfs.go:367 +0x191 fp=0xc00087f760 sp=0xc00087f700 pc=0x796e91
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.mkdirat(0xc000b20a80, 0x4?, 0xc000b20100?, 0x1ff)
	pkg/sentry/syscalls/linux/sys_file.go:947 +0x28b fp=0xc00087f8e8 sp=0xc00087f760 pc=0xb3f06b
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mkdirat(0xc000b20a80?, 0x0?, {{0xffffff9c}, {0x7f1a299e95c0}, {0x1ff}, {0x0}, {0x3}, {0x7f1a299e92d7}})
	pkg/sentry/syscalls/linux/sys_file.go:934 +0x50 fp=0xc00087f918 sp=0xc00087f8e8 pc=0xb3edb0
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000b20a80, 0x102, {{0xffffff9c}, {0x7f1a299e95c0}, {0x1ff}, {0x0}, {0x3}, {0x7f1a299e92d7}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc00087fc58 sp=0xc00087f918 pc=0x9d72cb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000b20a80, 0x85?, {{0xffffff9c}, {0x7f1a299e95c0}, {0x1ff}, {0x0}, {0x3}, {0x7f1a299e92d7}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc00087fcb8 sp=0xc00087fc58 pc=0x9d88b4
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x206?, 0xc00050c400?, {{0xffffff9c}, {0x7f1a299e95c0}, {0x1ff}, {0x0}, {0x3}, {0x7f1a299e92d7}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc00087fd18 sp=0xc00087fcb8 pc=0x9d84a5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000b24750?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc00087fe10 sp=0xc00087fd18 pc=0x9d816c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000ae2080?, 0xc000b20a80)
	pkg/sentry/kernel/task_run.go:269 +0x144a fp=0xc00087ff48 sp=0xc00087fe10 pc=0x9c9c2a
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000b20a80, 0x15)
	pkg/sentry/kernel/task_run.go:98 +0x25c fp=0xc00087ffc0 sp=0xc00087ff48 pc=0x9c80dc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:390 +0x2a fp=0xc00087ffe0 sp=0xc00087ffc0 pc=0x9d574a
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc00087ffe8 sp=0xc00087ffe0 pc=0x46d4c1
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:390 +0x105