[Bug 264257] [tcp] Panic: Fatal trap 12: page fault while in kernel mode (if_io_tqg_4) - m_copydata ... at /usr/src/sys/kern/uipc_mbuf.c:659

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 26 Mar 2023 03:40:03 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264257

--- Comment #115 from Richard Scheffenegger <rscheff@freebsd.org> ---
The stacktrace here looks entirely different, with the local system's tcp stack
not being involved (as this is a router, forwarded traffic doesn't normally get
processed by the tcp stack - only by the ip layer as is visible in the stack
trace).

I suggest to open a separate bug for this, and also provide the core dumps if
possible (note that the core dumps may contain sensible information in the mbuf
chains).

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