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

goroutine 209 [running]:
panic({0xc51560, 0x4000a19a10})
	GOROOT/src/runtime/panic.go:987 +0x3ac fp=0x40003cb460 sp=0x40003cb3a0 pc=0x450ac
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0xffff3b1485e0?, 0xd9ea00, 0xc9a9a0)
	GOROOT/src/runtime/iface.go:272 +0x70 fp=0x40003cb490 sp=0x40003cb460 pc=0x1a200
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).MkdirAt(0x40006ba960, {0x1034760, 0x40009ff500}, 0x4000503b00, {0xb708?, 0x3c?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:412 +0x648 fp=0x40003cb6c0 sp=0x40003cb490 pc=0x3d6c58
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).MkdirAt(0x4000137e00?, {0x1034760?, 0x40009ff500?}, 0x4000503b00?, {0x6000?, 0x84?})
	<autogenerated>:1 +0x30 fp=0x40003cb700 sp=0x40003cb6c0 pc=0x797880
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).MkdirAt(0x4000735c00?, {0x1034760, 0x40009ff500}, 0x0?, 0x40003cb8c8?, 0x40003cb7b4)
	pkg/sentry/vfs/vfs.go:367 +0x184 fp=0x40003cb760 sp=0x40003cb700 pc=0x36c414
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.mkdirat(0x40009ff500, 0x4?, 0x40009f0100?, 0x1ff)
	pkg/sentry/syscalls/linux/sys_file.go:947 +0x1c4 fp=0x40003cb8a0 sp=0x40003cb760 pc=0x6af274
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Mkdirat(0x40009ff500?, 0x0?, {{0xffffffffffffff9c}, {0xe9e955ae85e0}, {0x1ff}, {0xe03b5047b654}, {0xe03b504258e0}, {0xe03b504258e0}})
	pkg/sentry/syscalls/linux/sys_file.go:934 +0x50 fp=0x40003cb8d0 sp=0x40003cb8a0 pc=0x6af070
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0x40009ff500, 0x22, {{0xffffffffffffff9c}, {0xe9e955ae85e0}, {0x1ff}, {0xe03b5047b654}, {0xe03b504258e0}, {0xe03b504258e0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x678 fp=0x40003cbc10 sp=0x40003cb8d0 pc=0x56d2d8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0x40009ff500, 0x0?, {{0xffffffffffffff9c}, {0xe9e955ae85e0}, {0x1ff}, {0xe03b5047b654}, {0xe03b504258e0}, {0xe03b504258e0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x48 fp=0x40003cbc70 sp=0x40003cbc10 pc=0x56e5b8
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x4000283d58?, 0x8967a0?, {{0xffffffffffffff9c}, {0xe9e955ae85e0}, {0x1ff}, {0xe03b5047b654}, {0xe03b504258e0}, {0xe03b504258e0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x7c fp=0x40003cbcd0 sp=0x40003cbc70 pc=0x56e1bc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0x4000483520?)
	pkg/sentry/kernel/task_syscall.go:257 +0x330 fp=0x40003cbdd0 sp=0x40003cbcd0 pc=0x56dee0
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0x4000720200?, 0x40009ff500)
	pkg/sentry/kernel/task_run.go:269 +0x116c fp=0x40003cbf20 sp=0x40003cbdd0 pc=0x56105c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0x40009ff500, 0x13)
	pkg/sentry/kernel/task_run.go:98 +0x250 fp=0x40003cbfb0 sp=0x40003cbf20 pc=0x55f850
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:390 +0x2c fp=0x40003cbfd0 sp=0x40003cbfb0 pc=0x56ba0c
runtime.goexit()
	src/runtime/asm_arm64.s:1172 +0x4 fp=0x40003cbfd0 sp=0x40003cbfd0 pc=0x7a444
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:390 +0xf8