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Date:      Fri, 16 Oct 2020 12:24:39 +0000
From:      bugzilla-noreply@freebsd.org
To:        bugs@FreeBSD.org
Subject:   [Bug 250361] Kernel trap #9 in sys_semop
Message-ID:  <bug-250361-227-5iBM2grPdu@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-250361-227@https.bugs.freebsd.org/bugzilla/>
References:  <bug-250361-227@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=250361

--- Comment #5 from Konstantin Belousov <kib@FreeBSD.org> ---
You can try to do something with e.g. ktrace, but this would be hard because
system panics and records are not written.  Might be sync NFS mount from other
machine help, but I do not expect it.

So are you able to reproduce it at will, even with complex scenario ?
Try 12.2 or HEAD, you can install only kernel.  Perhaps enable INVARIANTS
when doing so.

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