net: ipv4: fix l3slave check for index returned in IP_PKTINFO
rt_iif is only set to the actual egress device for the output path. The recent change to consider the l3slave flag when returning IP_PKTINFO works for local traffic (the correct device index is returned), but it broke the more typical use case of packets received from a remote host always returning the VRF index rather than the original ingress device. Update the fixup to consider l3slave and rt_iif actually getting set. Fixes: 1dfa7639 ("net: ipv4: add check for l3slave for index returned in IP_PKTINFO") Signed-off-by: NDavid Ahern <dsahern@gmail.com> Signed-off-by: NDavid S. Miller <davem@davemloft.net>
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