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

goroutine 323 [running]:
panic({0x1161fc0, 0xc00042a9f0})
	GOROOT/src/runtime/panic.go:987 +0x3ba fp=0xc00092d428 sp=0xc00092d368 pc=0x43763a
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0x40?, 0x12b0a20, 0x11ae600)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc00092d450 sp=0xc00092d428 pc=0x40b17c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).LinkAt(0xc00043e000, {0x1575998, 0xc000650a80}, 0xc00067e000, {0xc000174900?, 0xc00050e690?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:367 +0x9ea fp=0xc00092d688 sp=0xc00092d450 pc=0x7e994a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).LinkAt(0xc0001ea180?, {0x1575998, 0xc000650a80}, 0xc0009b6360?, 0xc00052a600?, 0xc00092d840)
	pkg/sentry/vfs/vfs.go:296 +0x203 fp=0xc00092d708 sp=0xc00092d688 pc=0x77e9e3
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.linkat(0xc000650a80, 0x92d930?, 0xaf3ac8?, 0x650a80?, 0x400000002?, 0x1400)
	pkg/sentry/syscalls/linux/sys_file.go:1029 +0x3d5 fp=0xc00092d900 sp=0xc00092d708 pc=0xaf76d5
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Linkat(0x0?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/syscalls/linux/sys_file.go:998 +0x6e fp=0xc00092d940 sp=0xc00092d900 pc=0xaf72ce
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000650a80, 0x109, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc00092dc80 sp=0xc00092d940 pc=0x9ac88b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000650a80, 0x85?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc00092dce0 sp=0xc00092dc80 pc=0x9ade74
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x82a44f?, 0x0?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc00092dd40 sp=0xc00092dce0 pc=0x9ada65
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000529110?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc00092de38 sp=0xc00092dd40 pc=0x9ad72c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00054a000?, 0xc000650a80)
	pkg/sentry/kernel/task_run.go:259 +0x12ff fp=0xc00092df60 sp=0xc00092de38 pc=0x99f3bf
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000650a80, 0xf)
	pkg/sentry/kernel/task_run.go:94 +0x21c fp=0xc00092dfc0 sp=0xc00092df60 pc=0x99da1c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x2a fp=0xc00092dfe0 sp=0xc00092dfc0 pc=0x9aad0a
runtime.goexit()
	src/runtime/asm_amd64.s:1594 +0x1 fp=0xc00092dfe8 sp=0xc00092dfe0 pc=0x46c521
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0x105