wifi: mac80211: check EHT/TTLM action frame length

Check the EHT action frame length before accessing
the action code, if it's not present then the frame
cannot be valid.

Reported-by: syzbot+75af45a00cf13243ba39@syzkaller.appspotmail.com
Closes: https://lore.kernel.org/r/0000000000006c06870614886611@google.com/
Fixes: 8f500fbc6c ("wifi: mac80211: process and save negotiated TID to Link mapping request")
Link: https://msgid.link/20240326213858.19c84f34349f.I71b439f016b28f65284bb7646fe36343b74cbc9a@changeid
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
This commit is contained in:
Johannes Berg
2024-03-26 21:38:58 +01:00
parent 50108c352d
commit 7c1c73bf84

View File

@ -3780,6 +3780,10 @@ ieee80211_rx_h_action(struct ieee80211_rx_data *rx)
}
break;
case WLAN_CATEGORY_PROTECTED_EHT:
if (len < offsetofend(typeof(*mgmt),
u.action.u.ttlm_req.action_code))
break;
switch (mgmt->u.action.u.ttlm_req.action_code) {
case WLAN_PROTECTED_EHT_ACTION_TTLM_REQ:
if (sdata->vif.type != NL80211_IFTYPE_STATION)