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tcp: Missing mfree in rack and bbr

Description

tcp: Missing mfree in rack and bbr

Recently (Nov) we added logic that protects against a peer negotiating a timestamp, and
then not including a timestamp. This involved in the input path doing a goto done_with_input
label. Now I suspect the code was cribbed from one in Rack that has to do with the SYN.
This had a bug, i.e. it should have a m_freem(m) before going to the label (bbr had this
missing m_freem() but rack did not). This then caused the missing m_freem to show
up in both BBR and Rack. Also looking at the code referencing m->m_pkthdr.lro_nsegs
later (after processing) is not a good idea, even though its only for logging. Best to
copy that off before any frees can take place.

Reviewed by: mtuexen
Sponsored by: Netflix Inc
Differential Revision: https://reviews.freebsd.org/D30727

Details

Provenance
rrsAuthored on Jun 11 2021, 3:38 PM
Differential Revision
D30727: tcp: Missing mfree in rack and bbr.
Parents
rG6847ea50196f: Improve handling of USB device re-open in the LibUSB v1.x API.
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