Netfilter reroute check ignores IP_PKTINFO?

[Andrew Collins <bsderandrew@xxxxxxxxx>]

I'm running into an issue where locally generated packets with an
IP_PKTINFO ancillary message specifying a particular source interface
are getting routed incorrectly due to the reroute check.

It seems as if ip_route_me_harder takes into account iface bound sockets:

fl4.flowi4_oif = skb->sk ? skb->sk->sk_bound_dev_if : 0;

but does not take into account IP_PKTINFO, which seems inconsistent.
Is this simply an oversight or by design?
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