From: Johannes Berg <johannes.berg@xxxxxxxxx>
Instead of the current whitelist which accepts duplicates
only for the quiet and vendor IEs, use a blacklist of all
IEs (that we currently parse) that can't be duplicated.
This avoids detecting a beacon as corrupt in the future
when new IEs are added that can be duplicated.
Cc: Paul Stewart <pstew@xxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Johannes Berg <johannes.berg@xxxxxxxxx>
---
net/mac80211/util.c | 42 +++++++++++++++++++++++++++++++++++-------
1 file changed, 35 insertions(+), 7 deletions(-)
diff --git a/net/mac80211/util.c b/net/mac80211/util.c
index 22ca350..e6e4bda 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)))
--
1.7.10.4
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