[Bug 263613] iwlwifi0 on framework laptop crashes (kernel panic) when setting IP

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263613

--- Comment #37 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=2ac8a2189ac6707f48f77ef2e36baf696a0d2f40

commit 2ac8a2189ac6707f48f77ef2e36baf696a0d2f40
Author:     Bjoern A. Zeeb <bz@FreeBSD.org>
AuthorDate: 2024-02-03 16:33:56 +0000
Commit:     Bjoern A. Zeeb <bz@FreeBSD.org>
CommitDate: 2024-02-14 19:47:53 +0000

    LinuxKPI: 802.11: band-aid for invalid state changes after (*iv_update_bss)

    With firmware based solutions we cannot just jump from an active session
    to a new iv_bss node without tearing down state for the old and bringing
    up the new node.  This likely used to work on softmac based cards/drivers
    where one could essentially set the state and fire at will.

    We track (*iv_update_bss) calls from net80211 and set a local flag that
    we are out of synch and do not allow any further operations up the state
    machine until we hit INIT or SCAN.  That means someone will take the state
    down, clean up firmware state and then we can join again and build up
    state.

    Apparently this problem has been "known" for a while as native iwm(4) and
    others have similar workarounds (though less strict) and can be equally
    pestered into bad states.  For LinuxKPI all the KASSERTs just massively
    brought this problem out.  The solution will be some rewrites in net80211.
    Until then, try to keep us more stable at least and not die on second
    join1() calls triggered by service netif start wlan0 and similar.

    PR:             271979, 271988, 275255, 263613, 274003
    Sponsored by:   The FreeBSD Foundation (2023, partial)
    MFC after:      3 days
    Reviewed by:    cc
    Differential Revision: https://reviews.freebsd.org/D43725

 sys/compat/linuxkpi/common/src/linux_80211.c | 309 +++++++++++++++++++--------
 sys/compat/linuxkpi/common/src/linux_80211.h |   2 +
 2 files changed, 216 insertions(+), 95 deletions(-)

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