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pimd: Prevent crash when receiving register message when the RP() is unknown

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When receiving a register message for a Group, that the group has no
associated RP specified.  Prevent a crash from happening.

Signed-off-by: Donald Sharp <sharpd@nvidia.com>
(cherry picked from commit 54aa0bf6f2)
This commit is contained in:
Donald Sharp 2023-08-29 14:59:34 -04:00 committed by Mergify
parent fda0db038d
commit bbbe8b94c0
1 changed files with 9 additions and 1 deletions
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10
pimd/pim_register.c
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@ -507,6 +507,7 @@ int pim_register_recv(struct interface *ifp, pim_addr dest_addr,
struct pim_interface *pim_ifp = ifp->info; struct pim_interface *pim_ifp = ifp->info;
struct pim_instance *pim = pim_ifp->pim; struct pim_instance *pim = pim_ifp->pim;
pim_addr rp_addr; pim_addr rp_addr;
struct pim_rpf *rpg;
if (pim_ifp->pim_passive_enable) { if (pim_ifp->pim_passive_enable) {
if (PIM_DEBUG_PIM_PACKETS) if (PIM_DEBUG_PIM_PACKETS)
@ -615,7 +616,14 @@ int pim_register_recv(struct interface *ifp, pim_addr dest_addr,
} }
} }
rp_addr = (RP(pim, sg.grp))->rpf_addr; rpg = RP(pim, sg.grp);
if (!rpg) {
zlog_warn("%s: Received Register Message %pSG from %pPA on %s where the RP could not be looked up",
__func__, &sg, &src_addr, ifp->name);
return 0;
}
rp_addr = rpg->rpf_addr;
if (i_am_rp && (!pim_addr_cmp(dest_addr, rp_addr))) { if (i_am_rp && (!pim_addr_cmp(dest_addr, rp_addr))) {
sentRegisterStop = 0; sentRegisterStop = 0;