[Bug 255012] iwn driver kernel panic

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255012

            Bug ID: 255012
           Summary: iwn driver kernel panic
           Product: Base System
           Version: CURRENT
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: wireless
          Assignee: wireless at FreeBSD.org
          Reporter: nathanielbarragan1232 at gmail.com

The iwn driver, after a few hours of use, will kernel panic with a page fault.
It would seem that it occurs in iwn_rx_compressed_ba(). This is reproducable.

Steps to reproduce:
1. Connect to an AP (in my case it's using wpa_supplicant using WPA2 PSK)
2. Allow traffic to flow in and out of the interface (In this case, you can
just ping an address, and to speed up the process, put a wait time of 0.1 is
what I do to reproduce, but this happens during normal usage as well)
3. Wait for kernel panic.



Attached is a screenshot of the backtrace (please excuse the quality, I only
had a phone camera available), and am available to help as needed, although
response may take anywhere from instant to a few days. No longer than 3 days
usually.

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