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Date:      Tue, 09 Jun 2026 16:02:15 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 291294] panic during shutdown in callout_process
Message-ID:  <bug-291294-227-FK6ytC75wg@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

--- Comment #2 from Ryan Libby <rlibby@freebsd.org> ---
Does it reproduce regularly?

Here are a few debugging thoughts:
 - Report kernel config and loaded modules.
 - See if there's anything interesting in show msgbuf shortly before
   panic.
 - Enable ktr(4) and KTR_CALLOUT and examine and report ddb show ktr.
 - Use dtrace, for example maybe dump the stack and callout pointer upon
   callout_reset_sbt_on.

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