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

goroutine 436191 [running]:
panic({0x11d2c00, 0xc018ee15c0})
	GOROOT/src/runtime/panic.go:987 +0x3bb fp=0xc00ba053e8 sp=0xc00ba05328 pc=0x436a3b
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0x84cbdf?, 0x1324a40, 0x121f8a0)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc00ba05410 sp=0xc00ba053e8 pc=0x40b45c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).LinkAt(0xc008bb4000, {0x15c5cf8, 0xc0077b4a80}, 0xc004842480, {0xc006fe7c00?, 0xc0017ca0a0?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:367 +0x9e5 fp=0xc00ba05648 sp=0xc00ba05410 pc=0x7f8845
gvisor.dev/gvisor/pkg/sentry/fsimpl/cgroupfs.(*filesystem).LinkAt(0xc0000047d0?, {0x15c5cf8?, 0xc0077b4a80?}, 0xc0077b4a80?, {0xc006fe7c00?, 0xc0017ca0a0?})
	<autogenerated>:1 +0x38 fp=0xc00ba05688 sp=0xc00ba05648 pc=0xd376b8
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).LinkAt(0xc0003a4580?, {0x15c5cf8, 0xc0077b4a80}, 0xc0008ac240?, 0xc006412300?, 0xc00ba05840)
	pkg/sentry/vfs/vfs.go:296 +0x203 fp=0xc00ba05708 sp=0xc00ba05688 pc=0x78cda3
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.linkat(0xc0077b4a80, 0xb22db6?, 0xc00413f9c0?, 0xfd1b0f88?, 0x0?, 0x1400)
	pkg/sentry/syscalls/linux/sys_file.go:1029 +0x3b5 fp=0xc00ba05900 sp=0xc00ba05708 pc=0xb26ad5
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Linkat(0xc0077b4a80?, {{0x4}, {0x20000300}, {0x3}, {0x20000340}, {0x1400}, {0x0}})
	pkg/sentry/syscalls/linux/sys_file.go:998 +0x6e fp=0xc00ba05940 sp=0xc00ba05900 pc=0xb266ee
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0077b4a80, 0x109, {{0x4}, {0x20000300}, {0x3}, {0x20000340}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc00ba05c80 sp=0xc00ba05940 pc=0x9c922b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0077b4a80, 0x85?, {{0x4}, {0x20000300}, {0x3}, {0x20000340}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc00ba05ce0 sp=0xc00ba05c80 pc=0x9ca814
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc00ba05d88?, 0x980886?, {{0x4}, {0x20000300}, {0x3}, {0x20000340}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc00ba05d40 sp=0xc00ba05ce0 pc=0x9ca405
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc0069eb930?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc00ba05e38 sp=0xc00ba05d40 pc=0x9ca0cc
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc0055b8400?, 0xc0077b4a80)
	pkg/sentry/kernel/task_run.go:259 +0x12bf fp=0xc00ba05f60 sp=0xc00ba05e38 pc=0x9bbd7f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0077b4a80, 0x4170)
	pkg/sentry/kernel/task_run.go:94 +0x21c fp=0xc00ba05fc0 sp=0xc00ba05f60 pc=0x9ba41c
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x2a fp=0xc00ba05fe0 sp=0xc00ba05fc0 pc=0x9c76aa
runtime.goexit()
	src/runtime/asm_amd64.s:1598 +0x1 fp=0xc00ba05fe8 sp=0xc00ba05fe0 pc=0x46d401
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0x105