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

goroutine 1087 [running]:
panic({0x31ed00, 0xc00058d470})
	GOROOT/src/runtime/panic.go:987 +0x3ba fp=0xc0007c2e90 sp=0xc0007c2dd0 pc=0x12496ba
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0xc000445268?, 0x473860, 0x36bfe0)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc0007c2eb8 sp=0xc0007c2e90 pc=0x121cb9c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).LinkAt(0xc00039c1e0, {0x834698, 0xc000e8b500}, 0xc000b98900, {0xc00026c100?, 0xc0003ac400?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:367 +0xa4e fp=0xc0007c3118 sp=0xc0007c2eb8 pc=0x1827d6e
gvisor.dev/gvisor/pkg/sentry/fsimpl/proc.(*filesystem).LinkAt(0xc00039c1e0, {0x834698, 0xc000e8b500}, 0x12836c5?, {0xc00026c100?, 0xc0003ac400?})
	<autogenerated>:1 +0x8a fp=0xc0007c3180 sp=0xc0007c3118 pc=0x1dc3aea
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).LinkAt(0xc000e8bda0?, {0x834698, 0xc000e8b500}, 0xc000445200?, 0xc00018d500?, 0xc0007c33f8)
	pkg/sentry/vfs/vfs.go:296 +0x31d fp=0xc0007c3230 sp=0xc0007c3180 pc=0x178cadd
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.linkat(0xc000e8b500, 0x12836c5?, 0x1443bb2?, 0x1283697?, 0x101aa93f8?, 0x1400)
	pkg/sentry/syscalls/linux/sys_file.go:1029 +0x38c fp=0xc0007c34a8 sp=0xc0007c3230 pc=0x1c9072c
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Linkat(0xc000e8b500?, {{0xffffffff}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x65732f636f72702f}})
	pkg/sentry/syscalls/linux/sys_file.go:998 +0x48 fp=0xc0007c3500 sp=0xc0007c34a8 pc=0x1c90348
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000e8b500, 0x109, {{0xffffffff}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x65732f636f72702f}})
	pkg/sentry/kernel/task_syscall.go:142 +0x9b9 fp=0xc0007c39e0 sp=0xc0007c3500 pc=0x1aa9d19
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000e8b500, 0x0?, {{0xffffffff}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x65732f636f72702f}})
	pkg/sentry/kernel/task_syscall.go:322 +0x7d fp=0xc0007c3a78 sp=0xc0007c39e0 pc=0x1aabafd
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc000d68ea0?, 0xc000426870?, {{0xffffffff}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x65732f636f72702f}})
	pkg/sentry/kernel/task_syscall.go:282 +0x8f fp=0xc0007c3af0 sp=0xc0007c3a78 pc=0x1aab4af
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000e8b500)
	pkg/sentry/kernel/task_syscall.go:257 +0x4c5 fp=0xc0007c3c18 sp=0xc0007c3af0 pc=0x1aab045
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000e8b500?, 0xc000e8b500)
	pkg/sentry/kernel/task_run.go:259 +0x1b76 fp=0xc0007c3ec8 sp=0xc0007c3c18 pc=0x1a95b16
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000e8b500, 0x7f)
	pkg/sentry/kernel/task_run.go:94 +0x37b fp=0xc0007c3fb0 sp=0xc0007c3ec8 pc=0x1a935fb
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x48 fp=0xc0007c3fe0 sp=0xc0007c3fb0 pc=0x1aa7808
runtime.goexit()
	src/runtime/asm_amd64.s:1594 +0x1 fp=0xc0007c3fe8 sp=0xc0007c3fe0 pc=0x1280741
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0x1ad