Avoid dereferencing a NULL pointer when TCP_REASS_LOGGING is enabled
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Authored by tuexen on Feb 19 2019, 10:14 PM.

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Reviewers

bz
rrs

Group Reviewers

transport

Commits

rS344516: MFC r344428:
rS344428: This patch addresses an issue brought up by bz@ in D18968:

Summary

This patch addresses an issue brought up by bz@ in D18968: When TCP_REASS_LOGGING is defined (which doesn't compile right now), a NULL pointer dereference would happen, if user data was received during the TCP handshake and BB logging is used.

A KASSERT is also added to detect tcp_reass() calls with illegal parameter combinations.

Diff Detail

Repository

rS FreeBSD src repository - subversion

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Build Status

Buildable 22625

Event Timeline

tuexen created this revision.Feb 19 2019, 10:14 PM

Herald added a reviewer: transport. · View Herald TranscriptFeb 19 2019, 10:14 PM

Herald added a subscriber: imp. · View Herald Transcript

Harbormaster completed remote builds in B22585: Diff 54094.Feb 19 2019, 10:14 PM

tuexen retitled this revision from Avoid dereferencing a NULL point when TCP_REASS_LOGGING is enabled to Avoid dereferencing a NULL pointer when TCP_REASS_LOGGING is enabled.Feb 20 2019, 6:05 PM

bz added inline comments.Feb 20 2019, 6:30 PM

sys/netinet/tcp_reass.c
549	Please add %p and others to the printf so people will be able to have pointers to the tp, th, ..., m for debugging in case this fires. Will also help them to find out which illegal combination it was.

Address bz@'s comment.

Harbormaster completed remote builds in B22625: Diff 54147.Feb 20 2019, 7:23 PM

tuexen marked an inline comment as done.Feb 20 2019, 7:26 PM

tuexen added inline comments.

sys/netinet/tcp_reass.c
549	Good suggestion.Diff updated.

rrs accepted this revision.Feb 20 2019, 8:31 PM

This revision is now accepted and ready to land.Feb 20 2019, 8:31 PM

tuexen marked an inline comment as done.Feb 21 2019, 1:03 AM

Closed by commit rS344428: This patch addresses an issue brought up by bz@ in D18968: (authored by tuexen). · Explain WhyFeb 21 2019, 9:34 AM

This revision was automatically updated to reflect the committed changes.

Revision Contents
Changeset List

Path

Size

sys/

netinet/

tcp_reass.c

22 lines

Diff 54147

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Avoid dereferencing a NULL pointer when TCP_REASS_LOGGING is enabledClosedPublicActions