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

goroutine 518284 [running]:
panic({0x1162da0, 0xc0043c6510})
	GOROOT/src/runtime/panic.go:987 +0x3ba fp=0xc0015d5428 sp=0xc0015d5368 pc=0x43763a
runtime.panicdottypeE(...)
	GOROOT/src/runtime/iface.go:262
runtime.panicdottypeI(0x40?, 0x12b15c0, 0x11af340)
	GOROOT/src/runtime/iface.go:272 +0x7c fp=0xc0015d5450 sp=0xc0015d5428 pc=0x40b17c
gvisor.dev/gvisor/pkg/sentry/fsimpl/kernfs.(*Filesystem).LinkAt(0xc000760140, {0x1576138, 0xc0062e2000}, 0xc000626d80, {0xc00080f480?, 0xc009dcfef0?})
	pkg/sentry/fsimpl/kernfs/filesystem.go:367 +0x9ea fp=0xc0015d5688 sp=0xc0015d5450 pc=0x7e98ea
gvisor.dev/gvisor/pkg/sentry/vfs.(*VirtualFilesystem).LinkAt(0xc00073a100?, {0x1576138, 0xc0062e2000}, 0xc00878f8c0?, 0xc00a7ae800?, 0xc0015d5840)
	pkg/sentry/vfs/vfs.go:296 +0x203 fp=0xc0015d5708 sp=0xc0015d5688 pc=0x77e983
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.linkat(0xc0062e2000, 0x62e2000?, 0xaf3a68?, 0x5c912f88?, 0x0?, 0x1400)
	pkg/sentry/syscalls/linux/sys_file.go:1029 +0x3d5 fp=0xc0015d5900 sp=0xc0015d5708 pc=0xaf7675
gvisor.dev/gvisor/pkg/sentry/syscalls/linux.Linkat(0xc0062e2000?, {{0xa}, {0x20000100}, {0x6}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/syscalls/linux/sys_file.go:998 +0x6e fp=0xc0015d5940 sp=0xc0015d5900 pc=0xaf726e
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).executeSyscall(0xc0062e2000, 0x109, {{0xa}, {0x20000100}, {0x6}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:142 +0x80b fp=0xc0015d5c80 sp=0xc0015d5940 pc=0x9ac82b
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallInvoke(0xc0062e2000, 0x85?, {{0xa}, {0x20000100}, {0x6}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:322 +0x54 fp=0xc0015d5ce0 sp=0xc0015d5c80 pc=0x9ade14
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscallEnter(0xc0015d5d88?, 0x964a46?, {{0xa}, {0x20000100}, {0x6}, {0x200000c0}, {0x1400}, {0x0}})
	pkg/sentry/kernel/task_syscall.go:282 +0x85 fp=0xc0015d5d40 sp=0xc0015d5ce0 pc=0x9ada05
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).doSyscall(0xc002839ee0?)
	pkg/sentry/kernel/task_syscall.go:257 +0x3ac fp=0xc0015d5e38 sp=0xc0015d5d40 pc=0x9ad6cc
gvisor.dev/gvisor/pkg/sentry/kernel.(*runApp).execute(0xc000b9b600?, 0xc0062e2000)
	pkg/sentry/kernel/task_run.go:259 +0x12ff fp=0xc0015d5f60 sp=0xc0015d5e38 pc=0x99f35f
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).run(0xc0062e2000, 0x48b5)
	pkg/sentry/kernel/task_run.go:94 +0x21c fp=0xc0015d5fc0 sp=0xc0015d5f60 pc=0x99d9bc
gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start.func1()
	pkg/sentry/kernel/task_start.go:377 +0x2a fp=0xc0015d5fe0 sp=0xc0015d5fc0 pc=0x9aacaa
runtime.goexit()
	src/runtime/asm_amd64.s:1594 +0x1 fp=0xc0015d5fe8 sp=0xc0015d5fe0 pc=0x46c521
created by gvisor.dev/gvisor/pkg/sentry/kernel.(*Task).Start
	pkg/sentry/kernel/task_start.go:377 +0x105