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

goroutine 292 [running]:
panic({0x1161fc0, 0xc0006b0ab0})
	GOROOT/src/runtime/panic.go:987 +0x3ba fp=0xc00099f428 sp=0xc00099f368 pc=0x43763a
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0x40?, 0x12b0a20, 0x11ae600)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc00099f450 sp=0xc00099f428 pc=0x40b17c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).LinkAt(0xc00067a3c0, {0x1575998, 0xc00001b500}, 0xc000b02000, {0xc00049e080?, 0xc0002f4190?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:367 +0x9ea fp=0xc00099f688 sp=0xc00099f450 pc=0x7e994a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).LinkAt(0xc00049e500?, {0x1575998, 0xc00001b500}, 0xc0008bc1b0?, 0xc000b00600?, 0xc00099f840)
	pkg/sentry/vfs/vfs.go:296 +0x203 fp=0xc00099f708 sp=0xc00099f688 pc=0x77e9e3
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.linkat(0xc00001b500, 0x99f930?, 0xaf3ac8?, 0x1b500?, 0x400000002?, 0x1400)
	pkg/sentry/syscalls/linux/sys_file.go:1029 +0x3d5 fp=0xc00099f900 sp=0xc00099f708 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=0xc00099f940 sp=0xc00099f900 pc=0xaf72ce
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc00001b500, 0x109, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc00099fc80 sp=0xc00099f940 pc=0x9ac88b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc00001b500, 0x85?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc00099fce0 sp=0xc00099fc80 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=0xc00099fd40 sp=0xc00099fce0 pc=0x9ada65
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0004d2750?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc00099fe38 sp=0xc00099fd40 pc=0x9ad72c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0001bc780?, 0xc00001b500)
	pkg/sentry/kernel/task_run.go:259 +0x12ff fp=0xc00099ff60 sp=0xc00099fe38 pc=0x99f3bf
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc00001b500, 0xf)
	pkg/sentry/kernel/task_run.go:94 +0x21c fp=0xc00099ffc0 sp=0xc00099ff60 pc=0x99da1c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x2a fp=0xc00099ffe0 sp=0xc00099ffc0 pc=0x9aad0a
runtime.goexit()
	src/runtime/asm_amd64.s:1594 +0x1 fp=0xc00099ffe8 sp=0xc00099ffe0 pc=0x46c521
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0x105