[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

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=264257

--- Comment #41 from Richard Scheffenegger <rscheff@freebsd.org> ---
(In reply to Christos Chatzaras from comment #40)

Indeed. Unlike the other cores, the session is still in FIN_WAIT_1 state (6),
not LAST_ACK.

Also, there is an entire chain of 1-byte holes in the SACK scoreboard (which
got retransmitted. No sign of a rescue retransmission - snd_fack seems to have
covered snd_max (the FIN bit?) but there is a gap of 1 byte in the sequence
stream:

snd_max is still off from so_snd by 2 instead of the expected 1.

So not quite the same, but maybe the same root cause.

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