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September 2024

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New Defects reported by Coverity Scan for freerangerouting/frr
by scan-admin＠coverity.com 24 Sep '24

24 Sep '24

Hi, Please find the latest report on new defect(s) introduced to freerangerouting/frr found with Coverity Scan. 6 new defect(s) introduced to freerangerouting/frr found with Coverity Scan. New defect(s) Reported-by: Coverity Scan Showing 6 of 6 defect(s) ** CID 1599962: Null pointer dereferences (REVERSE_INULL) /ospf6d/ospf6_intra.c: 775 in ospf6_intra_prefix_lsa_get_prefix_str() ________________________________________________________________________________________________________ *** CID 1599962: Null pointer dereferences (REVERSE_INULL) /ospf6d/ospf6_intra.c: 775 in ospf6_intra_prefix_lsa_get_prefix_str() 769 { 770 struct ospf6_prefix *prefix = nth_prefix(lsa->header, pos); 771 struct in6_addr in6 = { 0 }; 772 char tbuf[16]; 773 774 /* ensure buflen >= INET6_ADDRSTRLEN + '/128\0' */ >>> CID 1599962: Null pointer dereferences (REVERSE_INULL) >>> Null-checking "lsa" suggests that it may be null, but it has already been dereferenced on all paths leading to the check. 775 if (!lsa || !prefix || !buf || buflen < (5 + INET6_ADDRSTRLEN)) 776 return NULL; 777 778 memcpy(&in6, OSPF6_PREFIX_BODY(prefix), 779 OSPF6_PREFIX_SPACE(prefix->prefix_length)); 780 inet_ntop(AF_INET6, &in6, buf, buflen); ** CID 1599961: Null pointer dereferences (FORWARD_NULL) /pimd/pim_nb_config.c: 3770 in lib_interface_gmp_address_family_proxy_modify() ________________________________________________________________________________________________________ *** CID 1599961: Null pointer dereferences (FORWARD_NULL) /pimd/pim_nb_config.c: 3770 in lib_interface_gmp_address_family_proxy_modify() 3764 ifp = nb_running_get_entry(args->dnode, NULL, true); 3765 pim_ifp = ifp->info; 3766 if (pim_ifp) 3767 pim_ifp->gm_proxy = yang_dnode_get_bool(args->dnode, 3768 NULL); 3769 >>> CID 1599961: Null pointer dereferences (FORWARD_NULL) >>> Dereferencing null pointer "pim_ifp". 3770 if (pim_ifp->gm_proxy) 3771 pim_if_gm_proxy_init(pim_ifp->pim, ifp); 3772 else 3773 pim_if_gm_proxy_finis(pim_ifp->pim, ifp); 3774 } 3775 return NB_OK; ** CID 1599960: Error handling issues (CHECKED_RETURN) /pimd/pim_autorp.c: 560 in autorp_send_announcement() ________________________________________________________________________________________________________ *** CID 1599960: Error handling issues (CHECKED_RETURN) /pimd/pim_autorp.c: 560 in autorp_send_announcement() 554 !pim_ifp->pim_passive_enable && 555 !pim_addr_is_any(pim_ifp->primary_address)) { 556 setsockopt(autorp->sock, IPPROTO_IP, 557 IP_MULTICAST_IF, 558 &(pim_ifp->primary_address), 559 sizeof(pim_ifp->primary_address)); >>> CID 1599960: Error handling issues (CHECKED_RETURN) >>> Calling "sendto(autorp->sock, autorp->annouce_pkt, autorp->annouce_pkt_sz, 0, __CONST_SOCKADDR_ARG({.__sockaddr__ = (struct sockaddr *)&announceGrp}), 16U)" without checking return value. This library function may fail and return an error code. 560 sendto(autorp->sock, autorp->annouce_pkt, 561 autorp->annouce_pkt_sz, 0, 562 (struct sockaddr *)&announceGrp, 563 sizeof(announceGrp)); 564 } 565 } ** CID 1599959: Control flow issues (DEADCODE) /bgpd/bgp_vty.c: 10614 in bgp_imexport_vrf_magic() ________________________________________________________________________________________________________ *** CID 1599959: Control flow issues (DEADCODE) /bgpd/bgp_vty.c: 10614 in bgp_imexport_vrf_magic() 10608 * restart where VRF instance has default VRF's ASN. 10609 */ 10610 SET_FLAG(vrf_bgp->vrf_flags, BGP_VRF_AUTO); 10611 } 10612 10613 if (ret) { >>> CID 1599959: Control flow issues (DEADCODE) >>> Execution cannot reach this statement: "vty_out(vty, "VRF %s is not...". 10614 vty_out(vty, 10615 "VRF %s is not configured as a bgp instance\n", 10616 import_name); 10617 return CMD_WARNING; 10618 } 10619 } ** CID 1599958: (CHECKED_RETURN) /pimd/pim_autorp.c: 556 in autorp_send_announcement() /pimd/pim_autorp.c: 543 in autorp_send_announcement() ________________________________________________________________________________________________________ *** CID 1599958: (CHECKED_RETURN) /pimd/pim_autorp.c: 556 in autorp_send_announcement() 550 * and have a primary address set. 551 */ 552 if (CHECK_FLAG(ifp->status, ZEBRA_INTERFACE_ACTIVE) && 553 pim_ifp && pim_ifp->pim_enable && 554 !pim_ifp->pim_passive_enable && 555 !pim_addr_is_any(pim_ifp->primary_address)) { >>> CID 1599958: (CHECKED_RETURN) >>> Calling "setsockopt(autorp->sock, IPPROTO_IP, 32, &pim_ifp->primary_address, 4U)" without checking return value. This library function may fail and return an error code. 556 setsockopt(autorp->sock, IPPROTO_IP, 557 IP_MULTICAST_IF, 558 &(pim_ifp->primary_address), 559 sizeof(pim_ifp->primary_address)); 560 sendto(autorp->sock, autorp->annouce_pkt, 561 autorp->annouce_pkt_sz, 0, /pimd/pim_autorp.c: 543 in autorp_send_announcement() 537 538 announceGrp.sin_family = AF_INET; 539 announceGrp.sin_port = htons(PIM_AUTORP_PORT); 540 inet_pton(PIM_AF, PIM_AUTORP_ANNOUNCEMENT_GRP, &announceGrp.sin_addr); 541 542 if (autorp->annouce_pkt_sz >= MIN_AUTORP_PKT_SZ) { >>> CID 1599958: (CHECKED_RETURN) >>> Calling "setsockopt(autorp->sock, IPPROTO_IP, 33, &autorp->announce_scope, 1U)" without checking return value. This library function may fail and return an error code. 543 setsockopt(autorp->sock, IPPROTO_IP, IP_MULTICAST_TTL, 544 &(autorp->announce_scope), 545 sizeof(autorp->announce_scope)); 546 547 FOR_ALL_INTERFACES (autorp->pim->vrf, ifp) { 548 pim_ifp = ifp->info; ** CID 1599957: Null pointer dereferences (REVERSE_INULL) /ospf6d/ospf6_intra.c: 581 in ospf6_link_lsa_get_prefix_str() ________________________________________________________________________________________________________ *** CID 1599957: Null pointer dereferences (REVERSE_INULL) /ospf6d/ospf6_intra.c: 581 in ospf6_link_lsa_get_prefix_str() 575 int buflen, int pos) 576 { 577 struct ospf6_link_lsa *link_lsa = lsa_after_header(lsa->header); 578 struct ospf6_prefix *prefix = nth_prefix(lsa->header, pos); 579 struct in6_addr in6 = { 0 }; 580 >>> CID 1599957: Null pointer dereferences (REVERSE_INULL) >>> Null-checking "lsa" suggests that it may be null, but it has already been dereferenced on all paths leading to the check. 581 if (!lsa || !prefix || !buf || buflen < (1 + INET6_ADDRSTRLEN)) 582 return NULL; 583 584 /* position zero is used for the lladdr in the body of the LSA */ 585 if (pos == 0) { 586 inet_ntop(AF_INET6, &link_lsa->linklocal_addr, buf, buflen); ________________________________________________________________________________________________________ To view the defects in Coverity Scan visit, https://u15810271.ct.sendgrid.net/ls/click?upn=u001.AxU2LYlgjL6eX23u9ErQy-2…

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FRR EVPN MH Query
by Atul Chowdhry 20 Sep '24

20 Sep '24

Hi Guys, I am looking at the given below function zebra_evpn_mac_is_static in zebra/zebra_evpn_mac.h file. */* if the mac has been added of a mac-route from the peer* * * or if it is being referenced by a neigh added by the * peer we cannot let it age out i.e. we set the static bit * in the dataplane */* *static inline bool zebra_evpn_mac_is_static(struct zebra_mac *mac){ return ((mac->flags & ZEBRA_MAC_ALL_PEER_FLAGS) || mac->sync_neigh_cnt);}* Is the use of ZEBRA_MAC_ALL_PEER_FLAGS correct here ? The current code is leading to creation of static mac on mac originating peer also since it will have the ZEBRA_MAC_ES_PEER_PROXY flag set. With this logic, mac is installed as static on all peers members of MH LAG. How will the mac then age out ? Rgds Atul

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