Module Name: src
Committed By: maxv
Date: Sun Apr 1 12:58:47 UTC 2018
Modified Files:
src/sys/netinet: tcp_output.c
Log Message:
Change the check to be <= instead of <. This fixes one occurrence of an
apparently widespread division-by-zero bug in our TCP code: if a user adds
huge IPv6 options with setsockopt, and if the total size of the options
happens to be equal to the available space calculated for the TCP payload,
t_segsz gets set to zero, and given that we then divide several things by
it, the kernel crashes.
To generate a diff of this commit:
cvs rdiff -u -r1.203 -r1.204 src/sys/netinet/tcp_output.c
Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.
