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-rw-r--r--net/sctp/sm_make_chunk.c47
-rw-r--r--net/sctp/sm_statefuns.c7
2 files changed, 46 insertions, 8 deletions
diff --git a/net/sctp/sm_make_chunk.c b/net/sctp/sm_make_chunk.c
index 46f54188f00a..dd98763c8b00 100644
--- a/net/sctp/sm_make_chunk.c
+++ b/net/sctp/sm_make_chunk.c
@@ -1836,6 +1836,39 @@ static int sctp_process_hn_param(const struct sctp_association *asoc,
1836 return 0; 1836 return 0;
1837} 1837}
1838 1838
1839static int sctp_verify_ext_param(union sctp_params param)
1840{
1841 __u16 num_ext = ntohs(param.p->length) - sizeof(sctp_paramhdr_t);
1842 int have_auth = 0;
1843 int have_asconf = 0;
1844 int i;
1845
1846 for (i = 0; i < num_ext; i++) {
1847 switch (param.ext->chunks[i]) {
1848 case SCTP_CID_AUTH:
1849 have_auth = 1;
1850 break;
1851 case SCTP_CID_ASCONF:
1852 case SCTP_CID_ASCONF_ACK:
1853 have_asconf = 1;
1854 break;
1855 }
1856 }
1857
1858 /* ADD-IP Security: The draft requires us to ABORT or ignore the
1859 * INIT/INIT-ACK if ADD-IP is listed, but AUTH is not. Do this
1860 * only if ADD-IP is turned on and we are not backward-compatible
1861 * mode.
1862 */
1863 if (sctp_addip_noauth)
1864 return 1;
1865
1866 if (sctp_addip_enable && !have_auth && have_asconf)
1867 return 0;
1868
1869 return 1;
1870}
1871
1839static void sctp_process_ext_param(struct sctp_association *asoc, 1872static void sctp_process_ext_param(struct sctp_association *asoc,
1840 union sctp_params param) 1873 union sctp_params param)
1841{ 1874{
@@ -1966,7 +1999,11 @@ static sctp_ierror_t sctp_verify_param(const struct sctp_association *asoc,
1966 case SCTP_PARAM_UNRECOGNIZED_PARAMETERS: 1999 case SCTP_PARAM_UNRECOGNIZED_PARAMETERS:
1967 case SCTP_PARAM_ECN_CAPABLE: 2000 case SCTP_PARAM_ECN_CAPABLE:
1968 case SCTP_PARAM_ADAPTATION_LAYER_IND: 2001 case SCTP_PARAM_ADAPTATION_LAYER_IND:
2002 break;
2003
1969 case SCTP_PARAM_SUPPORTED_EXT: 2004 case SCTP_PARAM_SUPPORTED_EXT:
2005 if (!sctp_verify_ext_param(param))
2006 return SCTP_IERROR_ABORT;
1970 break; 2007 break;
1971 2008
1972 case SCTP_PARAM_SET_PRIMARY: 2009 case SCTP_PARAM_SET_PRIMARY:
@@ -2139,10 +2176,11 @@ int sctp_process_init(struct sctp_association *asoc, sctp_cid_t cid,
2139 !asoc->peer.peer_hmacs)) 2176 !asoc->peer.peer_hmacs))
2140 asoc->peer.auth_capable = 0; 2177 asoc->peer.auth_capable = 0;
2141 2178
2142 2179 /* In a non-backward compatible mode, if the peer claims
2143 /* If the peer claims support for ADD-IP without support 2180 * support for ADD-IP but not AUTH, the ADD-IP spec states
2144 * for AUTH, disable support for ADD-IP. 2181 * that we MUST ABORT the association. Section 6. The section
2145 * Do this only if backward compatible mode is turned off. 2182 * also give us an option to silently ignore the packet, which
2183 * is what we'll do here.
2146 */ 2184 */
2147 if (!sctp_addip_noauth && 2185 if (!sctp_addip_noauth &&
2148 (asoc->peer.asconf_capable && !asoc->peer.auth_capable)) { 2186 (asoc->peer.asconf_capable && !asoc->peer.auth_capable)) {
@@ -2150,6 +2188,7 @@ int sctp_process_init(struct sctp_association *asoc, sctp_cid_t cid,
2150 SCTP_PARAM_DEL_IP | 2188 SCTP_PARAM_DEL_IP |
2151 SCTP_PARAM_SET_PRIMARY); 2189 SCTP_PARAM_SET_PRIMARY);
2152 asoc->peer.asconf_capable = 0; 2190 asoc->peer.asconf_capable = 0;
2191 goto clean_up;
2153 } 2192 }
2154 2193
2155 /* Walk list of transports, removing transports in the UNKNOWN state. */ 2194 /* Walk list of transports, removing transports in the UNKNOWN state. */
diff --git a/net/sctp/sm_statefuns.c b/net/sctp/sm_statefuns.c
index 0c9f37eb7d8d..511d8c9a171a 100644
--- a/net/sctp/sm_statefuns.c
+++ b/net/sctp/sm_statefuns.c
@@ -507,7 +507,9 @@ sctp_disposition_t sctp_sf_do_5_1C_ack(const struct sctp_endpoint *ep,
507 &err_chunk)) { 507 &err_chunk)) {
508 508
509 /* This chunk contains fatal error. It is to be discarded. 509 /* This chunk contains fatal error. It is to be discarded.
510 * Send an ABORT, with causes if there is any. 510 * Send an ABORT, with causes. If there are no causes,
511 * then there wasn't enough memory. Just terminate
512 * the association.
511 */ 513 */
512 if (err_chunk) { 514 if (err_chunk) {
513 packet = sctp_abort_pkt_new(ep, asoc, arg, 515 packet = sctp_abort_pkt_new(ep, asoc, arg,
@@ -526,9 +528,6 @@ sctp_disposition_t sctp_sf_do_5_1C_ack(const struct sctp_endpoint *ep,
526 } else { 528 } else {
527 error = SCTP_ERROR_NO_RESOURCE; 529 error = SCTP_ERROR_NO_RESOURCE;
528 } 530 }
529 } else {
530 sctp_sf_tabort_8_4_8(ep, asoc, type, arg, commands);
531 error = SCTP_ERROR_INV_PARAM;
532 } 531 }
533 532
534 /* SCTP-AUTH, Section 6.3: 533 /* SCTP-AUTH, Section 6.3: