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-rw-r--r--net/mac80211/ibss.c2
-rw-r--r--net/mac80211/rx.c74
-rw-r--r--net/mac80211/util.c42
3 files changed, 92 insertions, 26 deletions
diff --git a/net/mac80211/ibss.c b/net/mac80211/ibss.c
index 5f3620f0bc0a..bf87c70ac6c5 100644
--- a/net/mac80211/ibss.c
+++ b/net/mac80211/ibss.c
@@ -1108,7 +1108,7 @@ int ieee80211_ibss_join(struct ieee80211_sub_if_data *sdata,
sdata->u.ibss.state = IEEE80211_IBSS_MLME_SEARCH;
sdata->u.ibss.ibss_join_req = jiffies;
- memcpy(sdata->u.ibss.ssid, params->ssid, IEEE80211_MAX_SSID_LEN);
+ memcpy(sdata->u.ibss.ssid, params->ssid, params->ssid_len);
sdata->u.ibss.ssid_len = params->ssid_len;
mutex_unlock(&sdata->u.ibss.mtx);
diff --git a/net/mac80211/rx.c b/net/mac80211/rx.c
index 61c621e9273f..00ade7feb2e3 100644
--- a/net/mac80211/rx.c
+++ b/net/mac80211/rx.c
@@ -531,6 +531,11 @@ ieee80211_rx_mesh_check(struct ieee80211_rx_data *rx)
if (ieee80211_is_action(hdr->frame_control)) {
u8 category;
+
+ /* make sure category field is present */
+ if (rx->skb->len < IEEE80211_MIN_ACTION_SIZE)
+ return RX_DROP_MONITOR;
+
mgmt = (struct ieee80211_mgmt *)hdr;
category = mgmt->u.action.category;
if (category != WLAN_CATEGORY_MESH_ACTION &&
@@ -883,14 +888,16 @@ ieee80211_rx_h_check(struct ieee80211_rx_data *rx)
*/
if (rx->sta && rx->sdata->vif.type == NL80211_IFTYPE_STATION &&
ieee80211_is_data_present(hdr->frame_control)) {
- u16 ethertype;
- u8 *payload;
-
- payload = rx->skb->data +
- ieee80211_hdrlen(hdr->frame_control);
- ethertype = (payload[6] << 8) | payload[7];
- if (cpu_to_be16(ethertype) ==
- rx->sdata->control_port_protocol)
+ unsigned int hdrlen;
+ __be16 ethertype;
+
+ hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+ if (rx->skb->len < hdrlen + 8)
+ return RX_DROP_MONITOR;
+
+ skb_copy_bits(rx->skb, hdrlen + 6, &ethertype, 2);
+ if (ethertype == rx->sdata->control_port_protocol)
return RX_CONTINUE;
}
@@ -1462,11 +1469,14 @@ ieee80211_rx_h_defragment(struct ieee80211_rx_data *rx)
hdr = (struct ieee80211_hdr *)rx->skb->data;
fc = hdr->frame_control;
+
+ if (ieee80211_is_ctl(fc))
+ return RX_CONTINUE;
+
sc = le16_to_cpu(hdr->seq_ctrl);
frag = sc & IEEE80211_SCTL_FRAG;
if (likely((!ieee80211_has_morefrags(fc) && frag == 0) ||
- (rx->skb)->len < 24 ||
is_multicast_ether_addr(hdr->addr1))) {
/* not fragmented */
goto out;
@@ -1889,6 +1899,20 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
hdr = (struct ieee80211_hdr *) skb->data;
hdrlen = ieee80211_hdrlen(hdr->frame_control);
+
+ /* make sure fixed part of mesh header is there, also checks skb len */
+ if (!pskb_may_pull(rx->skb, hdrlen + 6))
+ return RX_DROP_MONITOR;
+
+ mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
+
+ /* make sure full mesh header is there, also checks skb len */
+ if (!pskb_may_pull(rx->skb,
+ hdrlen + ieee80211_get_mesh_hdrlen(mesh_hdr)))
+ return RX_DROP_MONITOR;
+
+ /* reload pointers */
+ hdr = (struct ieee80211_hdr *) skb->data;
mesh_hdr = (struct ieee80211s_hdr *) (skb->data + hdrlen);
/* frame is in RMC, don't forward */
@@ -1897,7 +1921,8 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
mesh_rmc_check(hdr->addr3, mesh_hdr, rx->sdata))
return RX_DROP_MONITOR;
- if (!ieee80211_is_data(hdr->frame_control))
+ if (!ieee80211_is_data(hdr->frame_control) ||
+ !(status->rx_flags & IEEE80211_RX_RA_MATCH))
return RX_CONTINUE;
if (!mesh_hdr->ttl)
@@ -1911,9 +1936,12 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
if (is_multicast_ether_addr(hdr->addr1)) {
mpp_addr = hdr->addr3;
proxied_addr = mesh_hdr->eaddr1;
- } else {
+ } else if (mesh_hdr->flags & MESH_FLAGS_AE_A5_A6) {
+ /* has_a4 already checked in ieee80211_rx_mesh_check */
mpp_addr = hdr->addr4;
proxied_addr = mesh_hdr->eaddr2;
+ } else {
+ return RX_DROP_MONITOR;
}
rcu_read_lock();
@@ -1941,12 +1969,9 @@ ieee80211_rx_h_mesh_fwding(struct ieee80211_rx_data *rx)
}
skb_set_queue_mapping(skb, q);
- if (!(status->rx_flags & IEEE80211_RX_RA_MATCH))
- goto out;
-
if (!--mesh_hdr->ttl) {
IEEE80211_IFSTA_MESH_CTR_INC(ifmsh, dropped_frames_ttl);
- return RX_DROP_MONITOR;
+ goto out;
}
if (!ifmsh->mshcfg.dot11MeshForwarding)
@@ -2353,6 +2378,10 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
}
break;
case WLAN_CATEGORY_SELF_PROTECTED:
+ if (len < (IEEE80211_MIN_ACTION_SIZE +
+ sizeof(mgmt->u.action.u.self_prot.action_code)))
+ break;
+
switch (mgmt->u.action.u.self_prot.action_code) {
case WLAN_SP_MESH_PEERING_OPEN:
case WLAN_SP_MESH_PEERING_CLOSE:
@@ -2371,6 +2400,10 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
}
break;
case WLAN_CATEGORY_MESH_ACTION:
+ if (len < (IEEE80211_MIN_ACTION_SIZE +
+ sizeof(mgmt->u.action.u.mesh_action.action_code)))
+ break;
+
if (!ieee80211_vif_is_mesh(&sdata->vif))
break;
if (mesh_action_is_path_sel(mgmt) &&
@@ -2913,10 +2946,15 @@ static void __ieee80211_rx_handle_packet(struct ieee80211_hw *hw,
if (ieee80211_is_data(fc) || ieee80211_is_mgmt(fc))
local->dot11ReceivedFragmentCount++;
- if (ieee80211_is_mgmt(fc))
- err = skb_linearize(skb);
- else
+ if (ieee80211_is_mgmt(fc)) {
+ /* drop frame if too short for header */
+ if (skb->len < ieee80211_hdrlen(fc))
+ err = -ENOBUFS;
+ else
+ err = skb_linearize(skb);
+ } else {
err = !pskb_may_pull(skb, ieee80211_hdrlen(fc));
+ }
if (err) {
dev_kfree_skb(skb);
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 94e586873979..239391807ca9 100644
--- a/net/mac80211/util.c
+++ b/net/mac80211/util.c
@@ -643,13 +643,41 @@ u32 ieee802_11_parse_elems_crc(u8 *start, size_t len,
break;
}
- if (id != WLAN_EID_VENDOR_SPECIFIC &&
- id != WLAN_EID_QUIET &&
- test_bit(id, seen_elems)) {
- elems->parse_error = true;
- left -= elen;
- pos += elen;
- continue;
+ switch (id) {
+ case WLAN_EID_SSID:
+ case WLAN_EID_SUPP_RATES:
+ case WLAN_EID_FH_PARAMS:
+ case WLAN_EID_DS_PARAMS:
+ case WLAN_EID_CF_PARAMS:
+ case WLAN_EID_TIM:
+ case WLAN_EID_IBSS_PARAMS:
+ case WLAN_EID_CHALLENGE:
+ case WLAN_EID_RSN:
+ case WLAN_EID_ERP_INFO:
+ case WLAN_EID_EXT_SUPP_RATES:
+ case WLAN_EID_HT_CAPABILITY:
+ case WLAN_EID_HT_OPERATION:
+ case WLAN_EID_VHT_CAPABILITY:
+ case WLAN_EID_VHT_OPERATION:
+ case WLAN_EID_MESH_ID:
+ case WLAN_EID_MESH_CONFIG:
+ case WLAN_EID_PEER_MGMT:
+ case WLAN_EID_PREQ:
+ case WLAN_EID_PREP:
+ case WLAN_EID_PERR:
+ case WLAN_EID_RANN:
+ case WLAN_EID_CHANNEL_SWITCH:
+ case WLAN_EID_EXT_CHANSWITCH_ANN:
+ case WLAN_EID_COUNTRY:
+ case WLAN_EID_PWR_CONSTRAINT:
+ case WLAN_EID_TIMEOUT_INTERVAL:
+ if (test_bit(id, seen_elems)) {
+ elems->parse_error = true;
+ left -= elen;
+ pos += elen;
+ continue;
+ }
+ break;
}
if (calc_crc && id < 64 && (filter & (1ULL << id)))
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-24 17:12:43 +0000