Date: Sat, 11 Jun 2022 21:00:06 +0000 From: bugzilla-noreply@freebsd.org To: net@FreeBSD.org Subject: [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 Message-ID: <bug-264257-7501-QQvL7ZNYYx@https.bugs.freebsd.org/bugzilla/> In-Reply-To: <bug-264257-7501@https.bugs.freebsd.org/bugzilla/> References: <bug-264257-7501@https.bugs.freebsd.org/bugzilla/>
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D264257 --- Comment #35 from Richard Scheffenegger <rscheff@freebsd.org> --- (In reply to iron.udjin from comment #31) Try the patch attached just now, which should apply cleanly. Note that if the hypothesis about snd_max getting infrequently incremented twice holds, you may observe more frequent panics in an INVARIANTS kernel - prior to these added checks, that oddity would not materially affect the tcp session. Only the new feature of SACK rescue retransmissions - which should also happen very infrequently at the same time as a FIN bit - exposed this. In that case, you may want to switch to a kernel without the INVARIANTS (wh= ich would still log those occurances, but not panic), or the default 13.1-RELEA= SE kernel with rfc6675_pipe disabled (to disable rescue retransmissions) for stable operation. --=20 You are receiving this mail because: You are the assignee for the bug. You are on the CC list for the bug.=
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