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

goroutine 354 [running]:
panic({0x1161a00, 0xc000998660})
	GOROOT/src/runtime/panic.go:987 +0x3ba fp=0xc0008d1428 sp=0xc0008d1368 pc=0x43763a
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0x40?, 0x12b01e0, 0x11adfa0)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc0008d1450 sp=0xc0008d1428 pc=0x40b17c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).LinkAt(0xc00049bea0, {0x1574a18, 0xc0009d7500}, 0xc000578900, {0xc000452080?, 0xc00063c1e0?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:367 +0x9ea fp=0xc0008d1688 sp=0xc0008d1450 pc=0x7e986a
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).LinkAt(0xc000796180?, {0x1574a18, 0xc0009d7500}, 0xc00034e5a0?, 0xc000844700?, 0xc0008d1840)
	pkg/sentry/vfs/vfs.go:296 +0x203 fp=0xc0008d1708 sp=0xc0008d1688 pc=0x77e903
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.linkat(0xc0009d7500, 0x8d1930?, 0xaf2c08?, 0x9d7500?, 0x400000002?, 0x1400)
	pkg/sentry/syscalls/linux/sys_file.go:1029 +0x3d5 fp=0xc0008d1900 sp=0xc0008d1708 pc=0xaf6815
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=0xc0008d1940 sp=0xc0008d1900 pc=0xaf640e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0009d7500, 0x109, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc0008d1c80 sp=0xc0008d1940 pc=0x9ac36b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0009d7500, 0x85?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc0008d1ce0 sp=0xc0008d1c80 pc=0x9ad954
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0x82a36f?, 0x0?, {{0x4}, {0x20000100}, {0x3}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc0008d1d40 sp=0xc0008d1ce0 pc=0x9ad545
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0006bcc30?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc0008d1e38 sp=0xc0008d1d40 pc=0x9ad20c
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000840380?, 0xc0009d7500)
	pkg/sentry/kernel/task_run.go:259 +0x12ff fp=0xc0008d1f60 sp=0xc0008d1e38 pc=0x99ee9f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0009d7500, 0xf)
	pkg/sentry/kernel/task_run.go:94 +0x21c fp=0xc0008d1fc0 sp=0xc0008d1f60 pc=0x99d4fc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x2a fp=0xc0008d1fe0 sp=0xc0008d1fc0 pc=0x9aa7ea
runtime.goexit()
	src/runtime/asm_amd64.s:1594 +0x1 fp=0xc0008d1fe8 sp=0xc0008d1fe0 pc=0x46c521
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0x105