Re: iwlwifi crash on connection

On Sat, 21 Feb 2026, Bjoern A. Zeeb wrote:

> On Fri, 21 Nov 2025, Bjoern A. Zeeb wrote:
>
> Hi,
>
>> On Fri, 21 Nov 2025, Mohammad Amin wrote:
>> 
>> Hi,
>> 
>>> Hi, thanks for your works and good luck.
>>> As I posted in 
>>> https://forums.freebsd.org/threads/iwlwifi-caused-a-kernel-panic.100121/, 
>>> I wanted to report a crash that happened when I connect to my iPhone’s 
>>> hotspot.
>>> I’m running FreeBSD 15.0-RC2 on my Legion 5 2022 Intel variant, which has 
>>> an AX211 wireless card.
>>> iwlwifi0@pci0:0:20:3:    class=0x028000 rev=0x01 hdr=0x00 vendor=0x8086 
>>> device=0x51f0 subvendor=0x8086 subdevice=0x0094
>>>    vendor     = 'Intel Corporation'
>>>    device     = 'Alder Lake-P PCH CNVi WiFi'
>>>    class      = network
>>> 
>>> Nov 20 16:06:28 localhost kernel: WARNING IS_ERR_OR_NULL(sta) failed at 
>>> /usr/src/sys/contrib/dev/iwlwifi/mvm/rxmq.c:722
>> 
>> This is an interesting one.
>> 
>> It's a "remove STA" command which failed but according to the backtrace it 
>> failed
>
> I assume you switched to iwx(4) if I remember the forums postings correctly.
> Nevertheless, I wanted to follow-up here.
>
> I hit this very exact FW crash yesterday after I undone some state machine
> bits from 3 years ago, and started to run test cases.
>
> 	iwlwifi0: 0x2010303A | ADVANCED_SYSASSERT
>
> Took me a few hours but I believe I found a cure; at least the regression
> testing is now continuing very smothly.  The fix will likely land in
> main at some point next week along with other changes and an iwlwifi
> driver update.  I'll have to see how to separate it from all the other works.
>
> I am surprised this hasn't been a much bigger problem for way more people
> as well.
>
> To take a long story short:  thank you for reporting it (also by email here).
> It has helped a lot;  and sorry it took so long to find a solution.

For the records, this went into main as
https://cgit.FreeBSD.org/src/commit/?id=fc9369abef6b6993e79b08de832e1d49f81a17b9

/bz

-- 
Bjoern A. Zeeb                                                     r15:7