RDKB-61540: disable HT coexistence #427
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Reason for change: Crash when client connects with 40MHz disabled in HT cap: 1. Client sends 40 MHz disabled in HT cap HT: STA 11:22:33:44:55:66 HT Capabilities Info: 0x402d update_sta_ht STA 11:22:33:44:55:66 - no greenfield, num of non-gf stations 1 update_sta_ht STA 11:22:33:44:55:66 - 20 MHz HT, num of 20MHz HT STAs 1 HT: Forty MHz Intolerant is set by STA 11:22:33:44:55:66 in Association Request 2. hostap tries to downgrade bandwith by setting secondary channel ht40_intolerant_add iface->conf->secondary_channel = 0; 3. Since other parameters are not updated it later fails in __ieee802_11_set_beacon - hostapd_set_freq_params 20/40 MHz: center segment 0 (=3) and center freq 1 (=2412) not in sync 4. Crash on params.freq->link_id = -1; Test Procedure: 1. Enable 40Mhz bandwidth 2. Connect Iphone 16 3. Check hostapd logs Risks: Low Priority: P1 Signed-off-by: Bogdan Bogush <[email protected]>
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mateuszCieslak-GL
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Nov 4, 2025
Broadcom driver does not have WPA_DRIVER_FLAGS_HT_2040_COEX capability flag set therefore it does not reproduce on these platforms. |
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Reason for change:
Crash when client connects with 40MHz disabled in HT cap:
HT: STA 11:22:33:44:55:66 HT Capabilities Info: 0x402d
update_sta_ht STA 11:22:33:44:55:66 - no greenfield, num of non-gf stations 1
update_sta_ht STA 11:22:33:44:55:66 - 20 MHz HT, num of 20MHz HT STAs 1
HT: Forty MHz Intolerant is set by STA 11:22:33:44:55:66 in Association Request
ht40_intolerant_add
iface->conf->secondary_channel = 0;
20/40 MHz: center segment 0 (=3) and center freq 1 (=2412) not in sync
Test Procedure:
Risks: Low
Priority: P1