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wifi: cfg80211: ignore invalid TBTT info field types

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The TBTT information field type must be zero. This is only changed in
the 802.11be draft specification where the value 1 is used to indicate
that only the MLD parameters are included.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230616094949.7865606ffe94.I7ff28afb875d1b4c39acd497df8490a7d3628e3f@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Berg 2023-06-16 09:54:02 +03:00 committed by Johannes Berg
parent 108d202298
commit 03e7e493f1
2 changed files with 9 additions and 0 deletions
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2
include/linux/ieee80211.h
View file

@ -4481,6 +4481,8 @@ static inline bool for_each_element_completed(const struct element *element,
#define IEEE80211_AP_INFO_TBTT_HDR_FILTERED 0x04
#define IEEE80211_AP_INFO_TBTT_HDR_COLOC 0x08
#define IEEE80211_AP_INFO_TBTT_HDR_COUNT 0xF0
#define IEEE80211_TBTT_INFO_TYPE_TBTT 0
#define IEEE80211_TBTT_INFO_TYPE_MLD 1
#define IEEE80211_TBTT_INFO_OFFSET_BSSID_BSS_PARAM 9
#define IEEE80211_TBTT_INFO_OFFSET_BSSID_SSSID_BSS_PARAM 13

7
net/wireless/scan.c
View file

@ -629,6 +629,13 @@ static int cfg80211_parse_colocated_ap(const struct cfg80211_bss_ies *ies,
if (end - pos < count * length)
break;
if (u8_get_bits(ap_info->tbtt_info_hdr,
IEEE80211_AP_INFO_TBTT_HDR_TYPE) !=
IEEE80211_TBTT_INFO_TYPE_TBTT) {
pos += count * length;
continue;
}
/*
* TBTT info must include bss param + BSSID +
* (short SSID or same_ssid bit to be set).