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Date:      Tue, 09 Jun 2026 11:41:02 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 291294] panic during shutdown in callout_process
Message-ID:  <bug-291294-227-iU5BRYSHvg@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-291294-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=291294

Bjoern A. Zeeb <bz@FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |bz@FreeBSD.org,
                   |                            |rlibby@freebsd.org

--- Comment #1 from Bjoern A. Zeeb <bz@FreeBSD.org> ---
Ryan had replied to my mailing list post given I had forgotten about this PR:
https://lists.freebsd.org/archives/freebsd-current/2026-June/010317.html

It is indeed the LIST_FOREACH_SAFE:

(gdb) l *callout_process+0x138
0xffffffff80c0f478 is in callout_process (/sys/kern/kern_timeout.c:476).
471             }
472     
473             /* Iterate callwheel from firstb to nowb and then up to lastb.
*/
474             do {
475                     sc = &cc->cc_callwheel[firstb & callwheelmask];
476                     LIST_FOREACH_SAFE(c, sc, c_links.le, next) {
477                             /* Run the callout if present time within
allowed. */
478                             if (c->c_time <= now) {
479                                     /*
480                                      * Consumer told us the callout may be
run

I'll go and see if we may have found the next LinuxKPI bug. *sigh*

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