From: Donald Sharp <sharpd@cumulusnetworks.com>
Date: Thu, 27 Oct 2016 00:26:16 +0000 (-0400)
Subject: pimd: Fix crash when igmp message comes in on non-configured interface
X-Git-Tag: frr-3.0-branchpoint~64^2~10^2~166
X-Git-Url: https://git.puffer.fish/?a=commitdiff_plain;h=3506072736df584a83af8d598e29f1aacf7ab1f9;p=mirror%2Ffrr.git

pimd: Fix crash when igmp message comes in on non-configured interface

When we receive a igmp message through the kernel upcall, make
sure that we are configured to work on that interface via pim/igmp
before attempting to use that interface.

Ticket: CM-13338
Signed-off-by: Donald Sharp <sharpd@cumulusnetworks.com>
---

diff --git a/pimd/pim_mroute.c b/pimd/pim_mroute.c
index 982aa9477a..5f8d180742 100644
--- a/pimd/pim_mroute.c
+++ b/pimd/pim_mroute.c
@@ -433,6 +433,14 @@ int pim_mroute_msg(int fd, const char *buf, int buf_size)
     }
 
     pim_ifp = ifp->info;
+    if (!pim_ifp)
+      {
+	if (PIM_DEBUG_MROUTE_DETAIL)
+	  zlog_debug ("%s: igmp kernel upcall for interface:%s not configured for pim",
+		      __PRETTY_FUNCTION__, ifp->name);
+	return 0;
+      }
+
     ifaddr = pim_find_primary_addr(ifp);
     igmp = pim_igmp_sock_lookup_ifaddr(pim_ifp->igmp_socket_list, ifaddr);