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

goroutine 248 [running]:
panic({0x106e9a0, 0xc00037f560})
	GOROOT/src/runtime/panic.go:987 +0x3ba fp=0xc0005eb380 sp=0xc0005eb2c0 pc=0x43781a
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0xc000457878?, 0x11bd180, 0x10baf40)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc0005eb3a8 sp=0xc0005eb380 pc=0x40b17c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).LinkAt(0xc0001f3ea0, {0x1450a98, 0xc00088e000}, 0xc0002c2480, {0xc000386080?, 0xc00019c6e0?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:367 +0x825 fp=0xc0005eb5d8 sp=0xc0005eb3a8 pc=0x7a0fe5
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).LinkAt(0xc000386600?, {0x1450a98, 0xc00088e000}, 0xc0002cecf0?, 0xc00078a800?, 0xc0005eb788)
	pkg/sentry/vfs/vfs.go:296 +0x18f fp=0xc0005eb658 sp=0xc0005eb5d8 pc=0x7494cf
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.linkat(0xc00088e000, 0x5eb878?, 0xa44dc8?, 0x88e000?, 0x400000002?, 0x1400)
	pkg/sentry/syscalls/linux/sys_file.go:1029 +0x359 fp=0xc0005eb848 sp=0xc0005eb658 pc=0xa47fd9
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Linkat(0xc000457878?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/syscalls/linux/sys_file.go:998 +0x32 fp=0xc0005eb888 sp=0xc0005eb848 pc=0xa47c52
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00088e000, 0x109, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x755 fp=0xc0005ebc78 sp=0xc0005eb888 pc=0x926d95
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00088e000, 0xc0003aa3a8?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4a fp=0xc0005ebcd8 sp=0xc0005ebc78 pc=0x927fca
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x0?, 0xc00002a000?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x65 fp=0xc0005ebd38 sp=0xc0005ebcd8 pc=0x927ca5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0008861a0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x2f0 fp=0xc0005ebe30 sp=0xc0005ebd38 pc=0x927a10
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000540100?, 0xc00088e000)
	pkg/sentry/kernel/task_run.go:259 +0xf3e fp=0xc0005ebf60 sp=0xc0005ebe30 pc=0x91bc5e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00088e000, 0xd)
	pkg/sentry/kernel/task_run.go:94 +0x1bc fp=0xc0005ebfc0 sp=0xc0005ebf60 pc=0x91a6dc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x2a fp=0xc0005ebfe0 sp=0xc0005ebfc0 pc=0x92558a
runtime.goexit()
	src/runtime/asm_amd64.s:1594 +0x1 fp=0xc0005ebfe8 sp=0xc0005ebfe0 pc=0x46c701
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0xef