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

goroutine 290 [running]:
panic({0x1161fc0, 0xc000648b40})
	GOROOT/src/runtime/panic.go:987 +0x3ba fp=0xc0005ef428 sp=0xc0005ef368 pc=0x43763a
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0x40?, 0x12b0a20, 0x11ae600)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc0005ef450 sp=0xc0005ef428 pc=0x40b17c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).LinkAt(0xc0003b6140, {0x15759d8, 0xc0005e4a80}, 0xc00032ad80, {0xc0000e6180?, 0xc0007d0230?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:367 +0x9ea fp=0xc0005ef688 sp=0xc0005ef450 pc=0x7e994a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).LinkAt(0xc0000e6700?, {0x15759d8, 0xc0005e4a80}, 0xc00031a240?, 0xc0001a3200?, 0xc0005ef840)
	pkg/sentry/vfs/vfs.go:296 +0x203 fp=0xc0005ef708 sp=0xc0005ef688 pc=0x77e9e3
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.linkat(0xc0005e4a80, 0x5ef930?, 0xaf3ac8?, 0x5e4a80?, 0x400000002?, 0x1400)
	pkg/sentry/syscalls/linux/sys_file.go:1029 +0x3d5 fp=0xc0005ef900 sp=0xc0005ef708 pc=0xaf76d5
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Linkat(0xc00049e048?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/syscalls/linux/sys_file.go:998 +0x6e fp=0xc0005ef940 sp=0xc0005ef900 pc=0xaf72ce
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0005e4a80, 0x109, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc0005efc80 sp=0xc0005ef940 pc=0x9ac88b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0005e4a80, 0x0?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc0005efce0 sp=0xc0005efc80 pc=0x9ade74
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00032c310?, 0xc0005efe28?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc0005efd40 sp=0xc0005efce0 pc=0x9ada65
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0005e60b0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc0005efe38 sp=0xc0005efd40 pc=0x9ad72c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc00062c200?, 0xc0005e4a80)
	pkg/sentry/kernel/task_run.go:259 +0x12ff fp=0xc0005eff60 sp=0xc0005efe38 pc=0x99f3bf
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0005e4a80, 0x1a)
	pkg/sentry/kernel/task_run.go:94 +0x21c fp=0xc0005effc0 sp=0xc0005eff60 pc=0x99da1c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x2a fp=0xc0005effe0 sp=0xc0005effc0 pc=0x9aad0a
runtime.goexit()
	src/runtime/asm_amd64.s:1594 +0x1 fp=0xc0005effe8 sp=0xc0005effe0 pc=0x46c521
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0x105