[Bug 275616] bwn driver causes kernel panic after connect

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=275616

            Bug ID: 275616
           Summary: bwn driver causes kernel panic after connect
           Product: Base System
           Version: 14.0-RELEASE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Some People
          Priority: ---
         Component: wireless
          Assignee: wireless@FreeBSD.org
          Reporter: frank.hilgendorf@posteo.de

Created attachment 246887
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=246887&action=edit
extract from /var/log/messages with KASAN output

The broadcom bwn Wifi driver causes a kernel panic soon after a connection with
an encrypted network is established. Soon means: immediate to approx. 30sec.
after the connection is established.

- This did not happen with FreeBSD RELEASE 13.x
- This does not happen when connecting to an unencrypted network
- It crashes both with CCMP and TKIP encryption

Hardware:
————————-
Macbook Pro 3,1 with Broadcom BCM4321 wireless card

Setup:
______
At boot time, the bwn_v4_ucode firmware module is not loaded, the machine goes
up and running.
When subsequently the firmware is loaded and the interface restarted,
it crashes after the connection is established.

  kldload bwn_v4_ucode
  service netif restart

The WLAN is a 2,4GHz 802.11g network.

wpa_supplicant.conf:

network={
        ssid="SomeNet"
        psk="SomePassword"
        pairwise=TKIP      # or CCMP
}

The attached messages extract contains KASAN output indicating 
trouble in the ieee_80211 crypto module.

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