Page MenuHomeFreeBSD
Differential D53540

tcp: drop SYN ACK segment for listening sockets
ClosedPublic
Actions

Authored by tuexen on Nov 2 2025, 7:48 PM.
Tags
None
Referenced Files
Unknown Object (File)
Thu, Dec 4, 9:41 AM
Unknown Object (File)
Thu, Dec 4, 3:28 AM
Unknown Object (File)
Thu, Nov 27, 1:18 AM
Unknown Object (File)
Wed, Nov 26, 8:38 PM
Unknown Object (File)
Mon, Nov 24, 11:37 AM
Unknown Object (File)
Mon, Nov 24, 10:35 AM
Unknown Object (File)
Nov 16 2025, 4:33 AM
Unknown Object (File)
Nov 14 2025, 11:43 AM
View All 27 Files
Subscribers
glebius
imp
melifaro

Details

Reviewers
nickbanks_netflix.com
rrs
rscheff
peter.lei_ieee.org
Group Reviewers
transport
Commits
rGbd4cf77ba2bb: tcp: drop SYN ACK segment for listening sockets
rGe082156ae14b: tcp: drop SYN ACK segment for listening sockets
rGb1ed408e0346: tcp: drop SYN ACK segment for listening sockets
rG239464e99321: tcp: drop SYN ACK segment for listening sockets
Summary

When a SYN ACK is received for a listening socket, just drop it instead of killing the SYN-cache entry and send a RST. This closes the possibility to kill a TCP connection during its handling in the SYN-cache.

Diff Detail

Repository
rG FreeBSD src repository
Lint
Lint Not Applicable
Unit
Tests Not Applicable

Revision Contents
Changeset List

PathSize
sys/
netinet/
5 lines
1 line
17 lines

Diff 165728

View Options

sys/netinet/tcp_input.c

Loading...
View Options

sys/netinet/tcp_syncache.h

Loading...
View Options

sys/netinet/tcp_syncache.c

Loading...