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wifi: cfg80211: check BSSID Index against MaxBSSID

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Add a verification that the BSSID Index does not exceed the maximum
number of BSSIDs in the Multiple-BSSID set.

Signed-off-by: Benjamin Berg <benjamin.berg@intel.com>
Reviewed-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Miri Korenblit <miriam.rachel.korenblit@intel.com>
Link: https://msgid.link/20240318184907.a7574d415adc.I02f40c2920a9f602898190679cc27d0c8ee2c67d@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Benjamin Berg 2024-03-18 18:53:28 +02:00 • committed by Johannes Berg
parent 0dfedd48ac
commit c7378d7d8b
1 changed files with 2 additions and 1 deletions
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3
net/wireless/scan.c
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@ -2447,7 +2447,8 @@ cfg80211_parse_mbssid_data(struct wiphy *wiphy,
profile, profile_len);
if (!mbssid_index_ie || mbssid_index_ie[1] < 1 ||
mbssid_index_ie[2] == 0 ||
mbssid_index_ie[2] > 46) {
mbssid_index_ie[2] > 46 ||
mbssid_index_ie[2] >= (1 << elem->data[0])) {
/* No valid Multiple BSSID-Index element */
continue;
}