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authorJohannes Berg <johannes@sipsolutions.net>2007-08-28 17:01:52 -0400
committerDavid S. Miller <davem@sunset.davemloft.net>2007-10-10 19:48:42 -0400
commit1a84f3fd141d2105d80290316bfa772ba34e9c64 (patch)
tree725c7aea7e8b88815d9c64b7a1e3f10858473574 /net/mac80211/rx.c
parentaaa92e9a743c740005d8a592dbc1b3ca310d35b5 (diff)
[MAC80211]: ratelimit some RX messages
Many if not all of these messages can be triggered by sending a few rogue frames which is trivially done and then we overflow our logs. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Acked-by: Michael Wu <flamingice@sourmilk.net> Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/mac80211/rx.c')
-rw-r--r--net/mac80211/rx.c122
1 files changed, 74 insertions, 48 deletions
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 01176ba52df4..7a6e60fcf9d0 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -336,13 +336,16 @@ ieee80211_rx_h_load_key(struct ieee80211_txrx_data *rx)
336 if (!rx->key) { 336 if (!rx->key) {
337 if (!rx->u.rx.ra_match) 337 if (!rx->u.rx.ra_match)
338 return TXRX_DROP; 338 return TXRX_DROP;
339 printk(KERN_DEBUG "%s: RX WEP frame with " 339 if (net_ratelimit())
340 "unknown keyidx %d (A1=" MAC_FMT " A2=" 340 printk(KERN_DEBUG "%s: RX WEP frame "
341 MAC_FMT " A3=" MAC_FMT ")\n", 341 "with unknown keyidx %d "
342 rx->dev->name, keyidx, 342 "(A1=" MAC_FMT
343 MAC_ARG(hdr->addr1), 343 " A2=" MAC_FMT
344 MAC_ARG(hdr->addr2), 344 " A3=" MAC_FMT ")\n",
345 MAC_ARG(hdr->addr3)); 345 rx->dev->name, keyidx,
346 MAC_ARG(hdr->addr1),
347 MAC_ARG(hdr->addr2),
348 MAC_ARG(hdr->addr3));
346 if (!rx->local->apdev) 349 if (!rx->local->apdev)
347 return TXRX_DROP; 350 return TXRX_DROP;
348 ieee80211_rx_mgmt( 351 ieee80211_rx_mgmt(
@@ -526,16 +529,18 @@ ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data *rx)
526 return TXRX_CONTINUE; 529 return TXRX_CONTINUE;
527 530
528 if (!rx->key) { 531 if (!rx->key) {
529 printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n", 532 if (net_ratelimit())
530 rx->dev->name); 533 printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n",
534 rx->dev->name);
531 return TXRX_DROP; 535 return TXRX_DROP;
532 } 536 }
533 537
534 if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) || 538 if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) ||
535 rx->key->force_sw_encrypt) { 539 rx->key->force_sw_encrypt) {
536 if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) { 540 if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) {
537 printk(KERN_DEBUG "%s: RX WEP frame, decrypt " 541 if (net_ratelimit())
538 "failed\n", rx->dev->name); 542 printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
543 "failed\n", rx->dev->name);
539 return TXRX_DROP; 544 return TXRX_DROP;
540 } 545 }
541 } else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) { 546 } else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
@@ -692,12 +697,15 @@ ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx)
692 } 697 }
693 rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue]; 698 rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue];
694 if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) { 699 if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) {
695 printk(KERN_DEBUG "%s: defrag: CCMP PN not sequential" 700 if (net_ratelimit())
696 " A2=" MAC_FMT " PN=%02x%02x%02x%02x%02x%02x " 701 printk(KERN_DEBUG "%s: defrag: CCMP PN not "
697 "(expected %02x%02x%02x%02x%02x%02x)\n", 702 "sequential A2=" MAC_FMT
698 rx->dev->name, MAC_ARG(hdr->addr2), 703 " PN=%02x%02x%02x%02x%02x%02x "
699 rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5], 704 "(expected %02x%02x%02x%02x%02x%02x)\n",
700 pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]); 705 rx->dev->name, MAC_ARG(hdr->addr2),
706 rpn[0], rpn[1], rpn[2], rpn[3], rpn[4],
707 rpn[5], pn[0], pn[1], pn[2], pn[3],
708 pn[4], pn[5]);
701 return TXRX_DROP; 709 return TXRX_DROP;
702 } 710 }
703 memcpy(entry->last_pn, pn, CCMP_PN_LEN); 711 memcpy(entry->last_pn, pn, CCMP_PN_LEN);
@@ -875,8 +883,9 @@ ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx)
875 (rx->key || rx->sdata->drop_unencrypted) && 883 (rx->key || rx->sdata->drop_unencrypted) &&
876 (rx->sdata->eapol == 0 || 884 (rx->sdata->eapol == 0 ||
877 !ieee80211_is_eapol(rx->skb)))) { 885 !ieee80211_is_eapol(rx->skb)))) {
878 printk(KERN_DEBUG "%s: RX non-WEP frame, but expected " 886 if (net_ratelimit())
879 "encryption\n", rx->dev->name); 887 printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
888 "encryption\n", rx->dev->name);
880 return TXRX_DROP; 889 return TXRX_DROP;
881 } 890 }
882 return TXRX_CONTINUE; 891 return TXRX_CONTINUE;
@@ -922,10 +931,15 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
922 931
923 if (unlikely(sdata->type != IEEE80211_IF_TYPE_AP && 932 if (unlikely(sdata->type != IEEE80211_IF_TYPE_AP &&
924 sdata->type != IEEE80211_IF_TYPE_VLAN)) { 933 sdata->type != IEEE80211_IF_TYPE_VLAN)) {
925 printk(KERN_DEBUG "%s: dropped ToDS frame (BSSID=" 934 if (net_ratelimit())
926 MAC_FMT " SA=" MAC_FMT " DA=" MAC_FMT ")\n", 935 printk(KERN_DEBUG "%s: dropped ToDS frame "
927 dev->name, MAC_ARG(hdr->addr1), 936 "(BSSID=" MAC_FMT
928 MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3)); 937 " SA=" MAC_FMT
938 " DA=" MAC_FMT ")\n",
939 dev->name,
940 MAC_ARG(hdr->addr1),
941 MAC_ARG(hdr->addr2),
942 MAC_ARG(hdr->addr3));
929 return TXRX_DROP; 943 return TXRX_DROP;
930 } 944 }
931 break; 945 break;
@@ -935,12 +949,16 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
935 memcpy(src, hdr->addr4, ETH_ALEN); 949 memcpy(src, hdr->addr4, ETH_ALEN);
936 950
937 if (unlikely(sdata->type != IEEE80211_IF_TYPE_WDS)) { 951 if (unlikely(sdata->type != IEEE80211_IF_TYPE_WDS)) {
938 printk(KERN_DEBUG "%s: dropped FromDS&ToDS frame (RA=" 952 if (net_ratelimit())
939 MAC_FMT " TA=" MAC_FMT " DA=" MAC_FMT " SA=" 953 printk(KERN_DEBUG "%s: dropped FromDS&ToDS "
940 MAC_FMT ")\n", 954 "frame (RA=" MAC_FMT
941 rx->dev->name, MAC_ARG(hdr->addr1), 955 " TA=" MAC_FMT " DA=" MAC_FMT
942 MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3), 956 " SA=" MAC_FMT ")\n",
943 MAC_ARG(hdr->addr4)); 957 rx->dev->name,
958 MAC_ARG(hdr->addr1),
959 MAC_ARG(hdr->addr2),
960 MAC_ARG(hdr->addr3),
961 MAC_ARG(hdr->addr4));
944 return TXRX_DROP; 962 return TXRX_DROP;
945 } 963 }
946 break; 964 break;
@@ -1015,15 +1033,16 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
1015 /* send multicast frames both to higher layers in 1033 /* send multicast frames both to higher layers in
1016 * local net stack and back to the wireless media */ 1034 * local net stack and back to the wireless media */
1017 skb2 = skb_copy(skb, GFP_ATOMIC); 1035 skb2 = skb_copy(skb, GFP_ATOMIC);
1018 if (!skb2) 1036 if (!skb2 && net_ratelimit())
1019 printk(KERN_DEBUG "%s: failed to clone " 1037 printk(KERN_DEBUG "%s: failed to clone "
1020 "multicast frame\n", dev->name); 1038 "multicast frame\n", dev->name);
1021 } else { 1039 } else {
1022 struct sta_info *dsta; 1040 struct sta_info *dsta;
1023 dsta = sta_info_get(local, skb->data); 1041 dsta = sta_info_get(local, skb->data);
1024 if (dsta && !dsta->dev) { 1042 if (dsta && !dsta->dev) {
1025 printk(KERN_DEBUG "Station with null dev " 1043 if (net_ratelimit())
1026 "structure!\n"); 1044 printk(KERN_DEBUG "Station with null "
1045 "dev structure!\n");
1027 } else if (dsta && dsta->dev == dev) { 1046 } else if (dsta && dsta->dev == dev) {
1028 /* Destination station is associated to this 1047 /* Destination station is associated to this
1029 * AP, so send the frame directly to it and 1048 * AP, so send the frame directly to it and
@@ -1135,24 +1154,28 @@ static void ieee80211_rx_michael_mic_report(struct net_device *dev,
1135 1154
1136 /* TODO: verify that this is not triggered by fragmented 1155 /* TODO: verify that this is not triggered by fragmented
1137 * frames (hw does not verify MIC for them). */ 1156 * frames (hw does not verify MIC for them). */
1138 printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC " 1157 if (net_ratelimit())
1139 "failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n", 1158 printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC "
1140 dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1), keyidx); 1159 "failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n",
1160 dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1),
1161 keyidx);
1141 1162
1142 if (!sta) { 1163 if (!sta) {
1143 /* Some hardware versions seem to generate incorrect 1164 /* Some hardware versions seem to generate incorrect
1144 * Michael MIC reports; ignore them to avoid triggering 1165 * Michael MIC reports; ignore them to avoid triggering
1145 * countermeasures. */ 1166 * countermeasures. */
1146 printk(KERN_DEBUG "%s: ignored spurious Michael MIC " 1167 if (net_ratelimit())
1147 "error for unknown address " MAC_FMT "\n", 1168 printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
1148 dev->name, MAC_ARG(hdr->addr2)); 1169 "error for unknown address " MAC_FMT "\n",
1170 dev->name, MAC_ARG(hdr->addr2));
1149 goto ignore; 1171 goto ignore;
1150 } 1172 }
1151 1173
1152 if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) { 1174 if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) {
1153 printk(KERN_DEBUG "%s: ignored spurious Michael MIC " 1175 if (net_ratelimit())
1154 "error for a frame with no ISWEP flag (src " 1176 printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
1155 MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2)); 1177 "error for a frame with no ISWEP flag (src "
1178 MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2));
1156 goto ignore; 1179 goto ignore;
1157 } 1180 }
1158 1181
@@ -1164,9 +1187,11 @@ static void ieee80211_rx_michael_mic_report(struct net_device *dev,
1164 * for group keys and only the AP is sending real multicast 1187 * for group keys and only the AP is sending real multicast
1165 * frames in BSS. */ 1188 * frames in BSS. */
1166 if (keyidx) { 1189 if (keyidx) {
1167 printk(KERN_DEBUG "%s: ignored Michael MIC error for " 1190 if (net_ratelimit())
1168 "a frame with non-zero keyidx (%d) (src " MAC_FMT 1191 printk(KERN_DEBUG "%s: ignored Michael MIC "
1169 ")\n", dev->name, keyidx, MAC_ARG(hdr->addr2)); 1192 "error for a frame with non-zero keyidx"
1193 " (%d) (src " MAC_FMT ")\n", dev->name,
1194 keyidx, MAC_ARG(hdr->addr2));
1170 goto ignore; 1195 goto ignore;
1171 } 1196 }
1172 } 1197 }
@@ -1174,10 +1199,11 @@ static void ieee80211_rx_michael_mic_report(struct net_device *dev,
1174 if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA && 1199 if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
1175 ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT || 1200 ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
1176 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) { 1201 (rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) {
1177 printk(KERN_DEBUG "%s: ignored spurious Michael MIC " 1202 if (net_ratelimit())
1178 "error for a frame that cannot be encrypted " 1203 printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
1179 "(fc=0x%04x) (src " MAC_FMT ")\n", 1204 "error for a frame that cannot be encrypted "
1180 dev->name, rx->fc, MAC_ARG(hdr->addr2)); 1205 "(fc=0x%04x) (src " MAC_FMT ")\n",
1206 dev->name, rx->fc, MAC_ARG(hdr->addr2));
1181 goto ignore; 1207 goto ignore;
1182 } 1208 }
1183 1209
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