Malformed RADIUS packet after upgrade to latest snapshot 53b9cc4

[Enig123]

I cannot connect to 801.x (WPA2 Enterprise) configured with EAP. The FreeRadius server debug run into errors as

Receive - Malformed RADIUS packet from host 192.168.1.2: Invalid attribute 0

which I never encountered before upgrade. Anything configuration that I should change to adapt to the new hostapd?

BTW, my FreeRadius server is running in another host, and 192.168.1.2 is the AP's ip address.

[Enig123]

Anyone has similar situations? Can someone help me with this issue?

Edit: The downside of using snapshot, apparently is that, you cannot easily go back to a working version in this situation, sigh!

[villeww]

Same problem here. I had to downgrade to 21.02rc2. After upgrading to latest snapshot, the RADIUS Access-Request packet contains an extra 0 value attribute as you noted. That attribute is not there with e.g. the 21.02rc2 version.

...
          Unknown Attribute (186), length: 6, Value:
            0x0000:  000f ac04
          Unknown Attribute (187), length: 6, Value:
            0x0000:  000f ac04
          Unknown Attribute (188), length: 6, Value:
            0x0000:  000f ac01
          Unknown Attribute (0), length: 3, Value:
            0x0000:  00
          Framed-MTU Attribute (12), length: 6, Value: 1400
            0x0000:  0000 0578
          EAP-Message Attribute (79), length: 37, Value: ..
...

By cursory glance I didn't see any changes in hostapd ieee802_1x.c code that creates this packet but something must have changed.

[Enig123]

I filed a bug report yesterday, hoping this issue get fixed soon.

[blogic]

Not been able to figure out why this happens, but this fixes it ....

Index: hostapd-2021-05-21-d98f4c46/src/ap/ieee802_1x.c
===================================================================
--- hostapd-2021-05-21-d98f4c46.orig/src/ap/ieee802_1x.c
+++ hostapd-2021-05-21-d98f4c46/src/ap/ieee802_1x.c
@@ -606,7 +606,7 @@ int add_common_radius_attr(struct hostap
                return -1;
 
        for (attr = req_attr; attr; attr = attr->next) {
-               if (!radius_msg_add_attr(msg, attr->type,
+               if (attr->type && !radius_msg_add_attr(msg, attr->type,
                                         wpabuf_head(attr->val),
                                         wpabuf_len(attr->val))) {
                        wpa_printf(MSG_ERROR, "Could not add RADIUS attribute");

[blogic]

just fixed the issue in the master branch
https://git.openwrt.org/?p=openwrt/openwrt.git;a=commit;h=96e9c81aabe9e14d6ec75c3f238c4ca7389b92a8

[Enig123]

Thanks for letting me know.

Unfortunately I have bricked the AP when I tried to configure DSA with new semantic, now I am using 21.02 RC2 as @villeww did.

[villeww]

Yep all good now, thank you.

[Enig123]

Since 21.02 RC2 has WiFi issue which will cause video playback stop, I have no choice but upgrade it back to master snapshot build.

Now I can confirm that the RADIUS issue been resolved.