[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 #69 from Richard Scheffenegger <rscheff@freebsd.org> ---
Are you using net.inet.tcp.rfc6675_pipe=1? While we are investigating the root
cause for snd_max to grow beyond what it is supposed to ever grow to, in the
meantime disabling sack rescue retransmissions should prevent these panics.

(Note: even though we have one core with the (effectively) full packet trace,
the misbehavior could not yet be reproduced properly.

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