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

goroutine 259 [running]:
panic({0x106e9a0, 0xc0003e8360})
	GOROOT/src/runtime/panic.go:987 +0x3ba fp=0xc0004f1380 sp=0xc0004f12c0 pc=0x43781a
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0xc000cbb878?, 0x11bd180, 0x10baf40)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc0004f13a8 sp=0xc0004f1380 pc=0x40b17c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).LinkAt(0xc0006a4320, {0x1450ad8, 0xc000cee000}, 0xc0000ee900, {0xc0000e6780?, 0xc0003c20f0?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:367 +0x825 fp=0xc0004f15d8 sp=0xc0004f13a8 pc=0x7a0fe5
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).LinkAt(0xc0000e6480?, {0x1450ad8, 0xc000cee000}, 0xc0001ee510?, 0xc000a82600?, 0xc0004f1788)
	pkg/sentry/vfs/vfs.go:296 +0x18f fp=0xc0004f1658 sp=0xc0004f15d8 pc=0x7494cf
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.linkat(0xc000cee000, 0x4f1878?, 0xa44dc8?, 0xcee000?, 0x400000002?, 0x1400)
	pkg/sentry/syscalls/linux/sys_file.go:1029 +0x359 fp=0xc0004f1848 sp=0xc0004f1658 pc=0xa47fd9
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Linkat(0x1e032d8?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/syscalls/linux/sys_file.go:998 +0x32 fp=0xc0004f1888 sp=0xc0004f1848 pc=0xa47c52
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc000cee000, 0x109, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x755 fp=0xc0004f1c78 sp=0xc0004f1888 pc=0x926d95
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc000cee000, 0x0?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x4a fp=0xc0004f1cd8 sp=0xc0004f1c78 pc=0x927fca
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0002ba000?, 0xc0004f1e20?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x65 fp=0xc0004f1d38 sp=0xc0004f1cd8 pc=0x927ca5
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc000cf0000?)
	pkg/sentry/kernel/task_syscall.go:257 +0x2f0 fp=0xc0004f1e30 sp=0xc0004f1d38 pc=0x927a10
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000bac000?, 0xc000cee000)
	pkg/sentry/kernel/task_run.go:259 +0xf3e fp=0xc0004f1f60 sp=0xc0004f1e30 pc=0x91bc5e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc000cee000, 0x19)
	pkg/sentry/kernel/task_run.go:94 +0x1bc fp=0xc0004f1fc0 sp=0xc0004f1f60 pc=0x91a6dc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x2a fp=0xc0004f1fe0 sp=0xc0004f1fc0 pc=0x92558a
runtime.goexit()
	src/runtime/asm_amd64.s:1594 +0x1 fp=0xc0004f1fe8 sp=0xc0004f1fe0 pc=0x46c701
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0xef