[Bug 263445] [tcp] Fatal trap 12: page fault while in kernel mode // supervisor read data, page not present // 13.1-RC3

From: <bugzilla-noreply_at_freebsd.org>
Date: Sun, 25 Sep 2022 10:05:51 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263445

--- Comment #29 from commit-hook@FreeBSD.org ---
A commit in branch stable/12 references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=26370413d43bfd65500270ff331ae6bdf0f54133

commit 26370413d43bfd65500270ff331ae6bdf0f54133
Author:     Michael Tuexen <tuexen@FreeBSD.org>
AuthorDate: 2022-09-19 10:42:43 +0000
Commit:     Richard Scheffenegger <rscheff@FreeBSD.org>
CommitDate: 2022-09-25 08:41:54 +0000

    tcp: fix computation of offset

    Only update the offset if actually retransmitting from the
    scoreboard. If not done correctly, this may result in
    trying to (re)-transmit data not being being in the socket
    buffe and therefore resulting in a panic.

    PR:                     264257
    PR:                     263445
    PR:                     260393
    Reviewed by:            rscheff@
    MFC after:              3 days
    Sponsored by:           Netflix, Inc.
    Differential Revision:  https://reviews.freebsd.org/D36626

    (cherry picked from commit 6d9e911fbadf3b409802a211c1dae9b47cb5a2b8)

 sys/netinet/tcp_output.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

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