#312 Segmentation Fault on 2.2.0 UDP write test that doesn't occur on 2.1.9 (Ubuntu 22.04 VM on Hyper-V)

[Gary Blythe]

Just pulled the 2.2.0 software and compiled on a Ubuntu 22.04 VM guest on Hyper-V (Server 2022). iPerf built with the standard "./configure make make install" sequence.

Server side: iperf -i 10 -s -p 5200 -e -u -w 512k

Client side: iperf -t 60 -i 10 -p 5200 -c 192.168.1.63 -e -u -w 512k -b 4g -P 3 -l 1472

Under 2.1.9, the test completes normally.

Under 2.2.0, a segmentation fault was generated immediately following the [SUM-cnt] line, as captured in the enclosed file.

The issue occurs only with the -P parameter in play.

[Gary Blythe]

BTW, I cut -P3 to -P2 and pushed the packet rate way down to 6 digits of bps and the problem was duplicated on my platforms, so it doesn't appear to be related to packet generation rate math...

[Robert McMahon]

Fixed in master and 2-2-1 branch as of April 18th