[PATCH] ieee80211: Workaround malformed 802.11 frames from AP
Stop processing further but return success when we receive a malformed
packet from the AP. We need this patch to workaround some AP bugs. For
example, the beacon frames from the Orinoco AP1000 contains an IE (value
= 128) with length equals to 8 but the actual frame length is only 7.
Signed-off-by: Zhu Yi <yi.zhu@intel.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
diff --git a/net/ieee80211/ieee80211_rx.c b/net/ieee80211/ieee80211_rx.c
index d60358d..7707041 100644
--- a/net/ieee80211/ieee80211_rx.c
+++ b/net/ieee80211/ieee80211_rx.c
@@ -1078,13 +1078,16 @@
while (length >= sizeof(*info_element)) {
if (sizeof(*info_element) + info_element->len > length) {
- IEEE80211_DEBUG_MGMT("Info elem: parse failed: "
- "info_element->len + 2 > left : "
- "info_element->len+2=%zd left=%d, id=%d.\n",
- info_element->len +
- sizeof(*info_element),
- length, info_element->id);
- return 1;
+ IEEE80211_ERROR("Info elem: parse failed: "
+ "info_element->len + 2 > left : "
+ "info_element->len+2=%zd left=%d, id=%d.\n",
+ info_element->len +
+ sizeof(*info_element),
+ length, info_element->id);
+ /* We stop processing but don't return an error here
+ * because some misbehaviour APs break this rule. ie.
+ * Orinoco AP1000. */
+ break;
}
switch (info_element->id) {