Oops in cfg80211 with a 8814au adapter

[sgaure]

I'm using a Bus 002 Device 002: ID 2357:0106 TP-Link Archer T9UH v1 [Realtek RTL8814AU] on Ubuntu 23.04, and get a kernel Oops when trying to connect to my wifi-network. I'm using:

8812au/5.6.4.2_35491.20191025, 6.2.0-20-generic, x86_64: installed, commit ca797e114

oops.txt

[sgaure]

Here's some more info. There's a long time since I debugged kernel stuff, but some printk's here and there reveals the following. The oops, a zero pointer reference, occurs in __cfg80211_connect_result in net/wireless/sme.c at the line ether_addr_copy(wdev->u.client.connected_addr, connected_addr).

It turns out that connected_addr is a zero pointer which has been set to cr->ap_mld_addr above, because cr->valid_links is 0. And cr->ap_mld_addr is zero. (Hmm, I don't understand that test, it seems to go the wrong way).

There is a test at the beginning of the function for ap_mld_addr being zero, but it's only performed if cr->valid_links is non-zero.

The request presumably originated in the 88XXau module, but I do not know where, neither do I know who should have set cr->ap_mld_addr.

[aneutron]

I have almost exactly the same thing, with the Archer T2U Nan. Kernel is 6.10 (Debian 12). I don't really have as much experience, but here's what I could gather:

The oops log file: rt-wifi-oops.txt

In installed gdb, the debug symbols and followed this tutorial, but this is all I could get as of now:

I can't however reliably reproduce this error, as it occurs after a long time of inactivity.