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fix a crash related to wep and mic handling (#1973) 

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@7813 3c298f89-4303-0410-b956-a3cf2f4a3e73
master
Felix Fietkau 2007-06-30 22:30:36 +00:00
parent 35aad8dc94
commit 7da0006733
1 changed files with 75 additions and 28 deletions
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103
package/madwifi/patches/309-micfail_detect.patch
View File

@ -1,7 +1,7 @@
Index: madwifi-ng-r2420-20070602/ath/if_ath.c
===================================================================
--- madwifi-ng-r2420-20070602.orig/ath/if_ath.c 2007-06-04 13:21:58.895023264 +0200
+++ madwifi-ng-r2420-20070602/ath/if_ath.c 2007-06-04 13:21:59.133986936 +0200
--- madwifi-ng-r2420-20070602.orig/ath/if_ath.c 2007-06-30 23:52:00.743038750 +0200
+++ madwifi-ng-r2420-20070602/ath/if_ath.c 2007-07-01 00:12:19.127183000 +0200
@@ -5602,6 +5602,7 @@
u_int phyerr;
u_int processed = 0, early_stop = 0;
@ -54,19 +54,19 @@ Index: madwifi-ng-r2420-20070602/ath/if_ath.c
+ /* MIC failure. Drop the packet in any case */
+ if (mic_fail) {
+ /* Drop control frames which are reported with mic error */
+ if ((((struct ieee80211_frame *)skb->data)->i_fc[0] & IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL) {
+ dev_kfree_skb(skb);
+ skb = NULL;
+ mic_fail = 0;
+ goto rx_next;
+ }
+ ni = ieee80211_find_rxnode(ic,
+ (const struct ieee80211_frame_min *) skb->data);
+ if (ni != NULL) {
+ /* Ignore control frames which are reported with mic error */
+ if ((((struct ieee80211_frame *)skb->data)->i_fc[0] &
+ IEEE80211_FC0_TYPE_MASK) == IEEE80211_FC0_TYPE_CTL)
+ goto drop_micfail;
+
+ ni = ieee80211_find_rxnode(ic, (const struct ieee80211_frame_min *) skb->data);
+
+ if (ni && ni->ni_table) {
+ ieee80211_check_mic(ni, skb);
+ ieee80211_unref_node(&ni);
+ }
+
+drop_micfail:
+ dev_kfree_skb_any(skb);
+ skb = NULL;
+ mic_fail = 0;
@ -78,8 +78,8 @@ Index: madwifi-ng-r2420-20070602/ath/if_ath.c
* pass the (referenced) node up to the 802.11 layer
Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_ccmp.c
===================================================================
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_ccmp.c 2007-06-04 13:21:57.936169032 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_ccmp.c 2007-06-04 13:21:59.134986784 +0200
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_ccmp.c 2007-06-30 23:52:00.042995000 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_ccmp.c 2007-06-30 23:52:00.999054750 +0200
@@ -78,7 +78,7 @@
static int ccmp_encap(struct ieee80211_key *, struct sk_buff *, u_int8_t);
static int ccmp_decap(struct ieee80211_key *, struct sk_buff *, int);
@ -100,8 +100,8 @@ Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_ccmp.c
}
Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto.h
===================================================================
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto.h 2007-06-04 13:21:53.000919304 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto.h 2007-06-04 13:21:59.134986784 +0200
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto.h 2007-06-30 23:51:53.942613750 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto.h 2007-06-30 23:52:01.107061500 +0200
@@ -145,7 +145,7 @@
int (*ic_encap)(struct ieee80211_key *, struct sk_buff *, u_int8_t);
int (*ic_decap)(struct ieee80211_key *, struct sk_buff *, int);
@ -126,8 +126,8 @@ Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto.h
/*
Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_none.c
===================================================================
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_none.c 2007-06-04 13:21:53.005918544 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_none.c 2007-06-04 13:21:59.134986784 +0200
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_none.c 2007-06-30 23:51:53.950614250 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_none.c 2007-06-30 23:52:01.171065500 +0200
@@ -52,7 +52,7 @@
static int none_encap(struct ieee80211_key *, struct sk_buff *, u_int8_t);
static int none_decap(struct ieee80211_key *, struct sk_buff *, int);
@ -148,8 +148,8 @@ Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_none.c
Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_tkip.c
===================================================================
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_tkip.c 2007-06-04 13:21:53.011917632 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_tkip.c 2007-06-04 13:21:59.135986632 +0200
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_tkip.c 2007-06-30 23:51:53.958614750 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_tkip.c 2007-06-30 23:52:01.203067500 +0200
@@ -57,7 +57,7 @@
static int tkip_encap(struct ieee80211_key *, struct sk_buff *, u_int8_t);
static int tkip_enmic(struct ieee80211_key *, struct sk_buff *, int);
@ -179,8 +179,8 @@ Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_tkip.c
u8 mic0[IEEE80211_WEP_MICLEN];
Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_wep.c
===================================================================
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_wep.c 2007-06-04 13:21:53.016916872 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_wep.c 2007-06-04 13:21:59.135986632 +0200
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_crypto_wep.c 2007-06-30 23:51:53.966615250 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_wep.c 2007-06-30 23:52:01.211068000 +0200
@@ -54,7 +54,7 @@
static int wep_encap(struct ieee80211_key *, struct sk_buff *, u_int8_t);
static int wep_decap(struct ieee80211_key *, struct sk_buff *, int);
@ -201,8 +201,8 @@ Index: madwifi-ng-r2420-20070602/net80211/ieee80211_crypto_wep.c
}
Index: madwifi-ng-r2420-20070602/net80211/ieee80211_input.c
===================================================================
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_input.c 2007-06-04 13:21:58.897022960 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_input.c 2007-06-04 13:21:59.137986328 +0200
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_input.c 2007-06-30 23:52:00.799042250 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_input.c 2007-06-30 23:52:01.239069750 +0200
@@ -632,7 +632,7 @@
* Next strip any MSDU crypto bits.
*/
@ -262,8 +262,8 @@ Index: madwifi-ng-r2420-20070602/net80211/ieee80211_input.c
* Debugging support.
Index: madwifi-ng-r2420-20070602/net80211/ieee80211_proto.h
===================================================================
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_proto.h 2007-06-04 13:21:58.134138936 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_proto.h 2007-06-04 13:21:59.137986328 +0200
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_proto.h 2007-06-30 23:52:00.331013000 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_proto.h 2007-06-30 23:52:01.295073250 +0200
@@ -91,6 +91,7 @@
void ieee80211_set11gbasicrates(struct ieee80211_rateset *, enum ieee80211_phymode);
enum ieee80211_phymode ieee80211_get11gbasicrates(struct ieee80211_rateset *);
@ -274,8 +274,8 @@ Index: madwifi-ng-r2420-20070602/net80211/ieee80211_proto.h
* Return the size of the 802.11 header for a management or data frame.
Index: madwifi-ng-r2420-20070602/net80211/ieee80211_linux.c
===================================================================
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_linux.c 2007-06-04 13:21:57.745198064 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_linux.c 2007-06-04 13:21:59.137986328 +0200
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_linux.c 2007-06-30 23:52:00.026994000 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_linux.c 2007-06-30 23:52:01.347076500 +0200
@@ -291,8 +291,8 @@
/* TODO: needed parameters: count, keyid, key type, src address, TSC */
snprintf(buf, sizeof(buf), "%s(keyid=%d %scast addr=%s)", tag,
@ -287,3 +287,50 @@ Index: madwifi-ng-r2420-20070602/net80211/ieee80211_linux.c
memset(&wrqu, 0, sizeof(wrqu));
wrqu.data.length = strlen(buf);
wireless_send_event(dev, IWEVCUSTOM, &wrqu, buf);
Index: madwifi-ng-r2420-20070602/net80211/ieee80211_output.c
===================================================================
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_output.c 2007-06-30 23:52:00.118999750 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_output.c 2007-06-30 23:52:01.355077000 +0200
@@ -1077,13 +1077,16 @@
cip = (struct ieee80211_cipher *) key->wk_cipher;
ciphdrsize = cip->ic_header;
tailsize += (cip->ic_trailer + cip->ic_miclen);
+
+ /* add the 8 bytes MIC length */
+ if (cip->ic_cipher == IEEE80211_CIPHER_TKIP)
+ pktlen += IEEE80211_WEP_MICLEN;
}
pdusize = vap->iv_fragthreshold - (hdrsize_nopad + ciphdrsize);
fragcnt = *framecnt =
- ((pktlen - (hdrsize_nopad + ciphdrsize)) / pdusize) +
- (((pktlen - (hdrsize_nopad + ciphdrsize)) %
- pdusize == 0) ? 0 : 1);
+ ((pktlen - hdrsize_nopad) / pdusize) +
+ (((pktlen - hdrsize_nopad) % pdusize == 0) ? 0 : 1);
/*
* Allocate sk_buff for each subsequent fragment; First fragment
Index: madwifi-ng-r2420-20070602/net80211/ieee80211_node.c
===================================================================
--- madwifi-ng-r2420-20070602.orig/net80211/ieee80211_node.c 2007-06-30 23:52:54.850420250 +0200
+++ madwifi-ng-r2420-20070602/net80211/ieee80211_node.c 2007-07-01 00:18:32.370509250 +0200
@@ -1885,11 +1885,13 @@
/* From this point onwards we can no longer find the node,
* so no more references are generated
*/
- ieee80211_remove_wds_addr(nt, ni->ni_macaddr);
- ieee80211_del_wds_node(nt, ni);
- IEEE80211_NODE_TABLE_LOCK_IRQ(nt);
- _node_table_leave(nt, ni);
- IEEE80211_NODE_TABLE_UNLOCK_IRQ(nt);
+ if (nt) {
+ ieee80211_remove_wds_addr(nt, ni->ni_macaddr);
+ ieee80211_del_wds_node(nt, ni);
+ IEEE80211_NODE_TABLE_LOCK_IRQ(nt);
+ _node_table_leave(nt, ni);
+ IEEE80211_NODE_TABLE_UNLOCK_IRQ(nt);
+ }
/*
* If node wasn't previously associated all