ip: avoid arp assert if out of buffers (VPP-1030)

Change-Id: Ia31b978c6c1619c3e0075a84fcbbb6ccbf1c0076
Signed-off-by: Florin Coras <[email protected]>
(cherry picked from commit d172a62365523427aebd34444736632c9a68a463)

diff --git a/src/vnet/ip/ip4_forward.c b/src/vnet/ip/ip4_forward.c
index 58cfd18..6b3453b 100755 (executable)
--- a/src/vnet/ip/ip4_forward.c
+++ b/src/vnet/ip/ip4_forward.c
@@ -2093,6 +2093,10 @@ ip4_arp_inline (vlib_main_t * vm,
                                                 &im->ip4_arp_request_packet_template,
                                                 &bi0);
 
+             /* Seems we're out of buffers */
+             if (PREDICT_FALSE (!h0))
+               continue;
+
              /* Add rewrite/encap string for ARP packet. */
              vnet_rewrite_one_header (adj0[0], h0,
                                       sizeof (ethernet_header_t));