[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>
This commit is contained in:
parent
aaa92e9a74
commit
1a84f3fd14
net/mac80211
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@ -336,13 +336,16 @@ ieee80211_rx_h_load_key(struct ieee80211_txrx_data *rx)
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if (!rx->key) {
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if (!rx->u.rx.ra_match)
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return TXRX_DROP;
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printk(KERN_DEBUG "%s: RX WEP frame with "
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"unknown keyidx %d (A1=" MAC_FMT " A2="
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MAC_FMT " A3=" MAC_FMT ")\n",
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rx->dev->name, keyidx,
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MAC_ARG(hdr->addr1),
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MAC_ARG(hdr->addr2),
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MAC_ARG(hdr->addr3));
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: RX WEP frame "
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"with unknown keyidx %d "
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"(A1=" MAC_FMT
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" A2=" MAC_FMT
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" A3=" MAC_FMT ")\n",
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rx->dev->name, keyidx,
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MAC_ARG(hdr->addr1),
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MAC_ARG(hdr->addr2),
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MAC_ARG(hdr->addr3));
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if (!rx->local->apdev)
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return TXRX_DROP;
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ieee80211_rx_mgmt(
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@ -526,16 +529,18 @@ ieee80211_rx_h_wep_decrypt(struct ieee80211_txrx_data *rx)
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return TXRX_CONTINUE;
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if (!rx->key) {
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printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n",
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rx->dev->name);
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: RX WEP frame, but no key set\n",
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rx->dev->name);
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return TXRX_DROP;
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}
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if (!(rx->u.rx.status->flag & RX_FLAG_DECRYPTED) ||
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rx->key->force_sw_encrypt) {
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if (ieee80211_wep_decrypt(rx->local, rx->skb, rx->key)) {
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printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
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"failed\n", rx->dev->name);
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: RX WEP frame, decrypt "
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"failed\n", rx->dev->name);
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return TXRX_DROP;
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}
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} else if (rx->local->hw.flags & IEEE80211_HW_WEP_INCLUDE_IV) {
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@ -692,12 +697,15 @@ ieee80211_rx_h_defragment(struct ieee80211_txrx_data *rx)
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}
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rpn = rx->key->u.ccmp.rx_pn[rx->u.rx.queue];
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if (memcmp(pn, rpn, CCMP_PN_LEN) != 0) {
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printk(KERN_DEBUG "%s: defrag: CCMP PN not sequential"
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" A2=" MAC_FMT " PN=%02x%02x%02x%02x%02x%02x "
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"(expected %02x%02x%02x%02x%02x%02x)\n",
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rx->dev->name, MAC_ARG(hdr->addr2),
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rpn[0], rpn[1], rpn[2], rpn[3], rpn[4], rpn[5],
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pn[0], pn[1], pn[2], pn[3], pn[4], pn[5]);
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: defrag: CCMP PN not "
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"sequential A2=" MAC_FMT
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" PN=%02x%02x%02x%02x%02x%02x "
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"(expected %02x%02x%02x%02x%02x%02x)\n",
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rx->dev->name, MAC_ARG(hdr->addr2),
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rpn[0], rpn[1], rpn[2], rpn[3], rpn[4],
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rpn[5], pn[0], pn[1], pn[2], pn[3],
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pn[4], pn[5]);
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return TXRX_DROP;
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}
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memcpy(entry->last_pn, pn, CCMP_PN_LEN);
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@ -875,8 +883,9 @@ ieee80211_rx_h_drop_unencrypted(struct ieee80211_txrx_data *rx)
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(rx->key || rx->sdata->drop_unencrypted) &&
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(rx->sdata->eapol == 0 ||
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!ieee80211_is_eapol(rx->skb)))) {
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printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
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"encryption\n", rx->dev->name);
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: RX non-WEP frame, but expected "
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"encryption\n", rx->dev->name);
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return TXRX_DROP;
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}
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return TXRX_CONTINUE;
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@ -922,10 +931,15 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
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if (unlikely(sdata->type != IEEE80211_IF_TYPE_AP &&
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sdata->type != IEEE80211_IF_TYPE_VLAN)) {
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printk(KERN_DEBUG "%s: dropped ToDS frame (BSSID="
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MAC_FMT " SA=" MAC_FMT " DA=" MAC_FMT ")\n",
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dev->name, MAC_ARG(hdr->addr1),
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MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3));
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: dropped ToDS frame "
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"(BSSID=" MAC_FMT
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" SA=" MAC_FMT
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" DA=" MAC_FMT ")\n",
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dev->name,
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MAC_ARG(hdr->addr1),
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MAC_ARG(hdr->addr2),
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MAC_ARG(hdr->addr3));
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return TXRX_DROP;
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}
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break;
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@ -935,12 +949,16 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
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memcpy(src, hdr->addr4, ETH_ALEN);
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if (unlikely(sdata->type != IEEE80211_IF_TYPE_WDS)) {
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printk(KERN_DEBUG "%s: dropped FromDS&ToDS frame (RA="
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MAC_FMT " TA=" MAC_FMT " DA=" MAC_FMT " SA="
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MAC_FMT ")\n",
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rx->dev->name, MAC_ARG(hdr->addr1),
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MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr3),
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MAC_ARG(hdr->addr4));
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: dropped FromDS&ToDS "
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"frame (RA=" MAC_FMT
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" TA=" MAC_FMT " DA=" MAC_FMT
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" SA=" MAC_FMT ")\n",
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rx->dev->name,
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MAC_ARG(hdr->addr1),
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MAC_ARG(hdr->addr2),
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MAC_ARG(hdr->addr3),
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MAC_ARG(hdr->addr4));
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return TXRX_DROP;
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}
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break;
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@ -1015,15 +1033,16 @@ ieee80211_rx_h_data(struct ieee80211_txrx_data *rx)
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/* send multicast frames both to higher layers in
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* local net stack and back to the wireless media */
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skb2 = skb_copy(skb, GFP_ATOMIC);
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if (!skb2)
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if (!skb2 && net_ratelimit())
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printk(KERN_DEBUG "%s: failed to clone "
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"multicast frame\n", dev->name);
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} else {
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struct sta_info *dsta;
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dsta = sta_info_get(local, skb->data);
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if (dsta && !dsta->dev) {
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printk(KERN_DEBUG "Station with null dev "
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"structure!\n");
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if (net_ratelimit())
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printk(KERN_DEBUG "Station with null "
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"dev structure!\n");
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} else if (dsta && dsta->dev == dev) {
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/* Destination station is associated to this
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* AP, so send the frame directly to it and
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@ -1135,24 +1154,28 @@ static void ieee80211_rx_michael_mic_report(struct net_device *dev,
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/* TODO: verify that this is not triggered by fragmented
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* frames (hw does not verify MIC for them). */
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printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC "
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"failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n",
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dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1), keyidx);
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: TKIP hwaccel reported Michael MIC "
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"failure from " MAC_FMT " to " MAC_FMT " keyidx=%d\n",
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dev->name, MAC_ARG(hdr->addr2), MAC_ARG(hdr->addr1),
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keyidx);
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if (!sta) {
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/* Some hardware versions seem to generate incorrect
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* Michael MIC reports; ignore them to avoid triggering
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* countermeasures. */
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printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
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"error for unknown address " MAC_FMT "\n",
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dev->name, MAC_ARG(hdr->addr2));
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
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"error for unknown address " MAC_FMT "\n",
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dev->name, MAC_ARG(hdr->addr2));
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goto ignore;
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}
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if (!(rx->fc & IEEE80211_FCTL_PROTECTED)) {
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printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
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"error for a frame with no ISWEP flag (src "
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MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2));
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
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"error for a frame with no ISWEP flag (src "
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MAC_FMT ")\n", dev->name, MAC_ARG(hdr->addr2));
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goto ignore;
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}
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@ -1164,9 +1187,11 @@ static void ieee80211_rx_michael_mic_report(struct net_device *dev,
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* for group keys and only the AP is sending real multicast
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* frames in BSS. */
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if (keyidx) {
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printk(KERN_DEBUG "%s: ignored Michael MIC error for "
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"a frame with non-zero keyidx (%d) (src " MAC_FMT
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")\n", dev->name, keyidx, MAC_ARG(hdr->addr2));
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: ignored Michael MIC "
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"error for a frame with non-zero keyidx"
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" (%d) (src " MAC_FMT ")\n", dev->name,
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keyidx, MAC_ARG(hdr->addr2));
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goto ignore;
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}
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}
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@ -1174,10 +1199,11 @@ static void ieee80211_rx_michael_mic_report(struct net_device *dev,
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if ((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_DATA &&
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((rx->fc & IEEE80211_FCTL_FTYPE) != IEEE80211_FTYPE_MGMT ||
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(rx->fc & IEEE80211_FCTL_STYPE) != IEEE80211_STYPE_AUTH)) {
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printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
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"error for a frame that cannot be encrypted "
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"(fc=0x%04x) (src " MAC_FMT ")\n",
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dev->name, rx->fc, MAC_ARG(hdr->addr2));
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if (net_ratelimit())
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printk(KERN_DEBUG "%s: ignored spurious Michael MIC "
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"error for a frame that cannot be encrypted "
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"(fc=0x%04x) (src " MAC_FMT ")\n",
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dev->name, rx->fc, MAC_ARG(hdr->addr2));
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goto ignore;
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}
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