trouble with commit: AP: Support disconnect with MLD

[Jouni Malinen]

On Sun, Jan 12, 2025 at 09:25:42AM +0100, e9hack wrote:
> something is broken in commit
> 
> 01677c47fb13976e078b5a2157aa6bebf19f1731
> AP: Support disconnect with MLD
> 
> I've setup a 2G AP in WPA-PSK/SAE mixed mode. All clients which using WPA-PSK will be disconnect after a few seconds:
> 
> Sun Jan 12 08:22:13 2025 daemon.info hostapd: 2G-ap4: STA cc:cc:cc:cc:cc:cc IEEE 802.11: authenticated
...

Would you be able to provide a more detailed debug log from hostapd
(e.g., stdout with -ddt on the command line) showing this? It would also
be helpful to get a hostapd configuration file that shows the exact
configuration that results in such behavior.

> I've setup a 5G AP in WPA-EAP mode using the internal radius server. Clients (windows 10) can connect and the connection is stable.
> If I reboot a client, hostapd crashes with a page fault. Output from gdb:
> 
> Core was generated by `/usr/sbin/hostapd -s -g /var/run/hostapd/global'.
> Program terminated with signal SIGSEGV, Segmentation fault.
> #0  0x5560a4a8 in eapol_port_timers_tick (eloop_ctx=0x0, timeout_ctx=0x775e9240) at ../src/eapol_auth/eapol_auth_sm.c:180
> 180             if (state->eap_if->retransWhile > 0) {

Would you be able to provide the full backtrace for this?

> I'm using hostap on OpenWrt. OpenWrt does update hostap to the version from 2025/01/01.
> 
> If I revert the mentioned commit only, I see no issues.

If I've understood correctly, there are a number of custom changes in
OpenWrt and the issue might be related to how those interact with the
identified commit. I'd need to be able to reproduce this with the exact
upstream version and/or get more details to be able to figure out what
exactly happens here.

-- 
Jouni Malinen                                            PGP id EFC895FA