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pim6d: Fix crash in ipv6 pim command
Problem: Execute the below commands, pim6d core happens. interface ens193 ip address 69.0.0.2/24 ipv6 address 8000::1/120 ipv6 mld ipv6 pim We see crash only if the interface is not configured, and we are executing PIM/MLD commands. RootCause: Interface ens193 is not configured. So, it will have ifindex = 0 and mroute_vif_index = -1. Currently, we don't enable MLD on an interface if mroute_vif_index < 0. So, pim_ifp->MLD = NULL. In the API pim_if_membership_refresh(), we are accessing pim_ifp->MLD NULL pointer which leads to crash. Fix: Added NULL check before accessing pim_ifp->MLD pointer in the API pim_if_membership_refresh(). Issue: FRRouting#13385 Signed-off-by: Sarita Patra <[email protected]>
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