On January 31st 2014 a post appeared on oss-seclist [1] describing a bug in the Linux kernel implementation of the x32 recvmmsg syscall that could potentially lead to privilege escalation. It didn't take long until the first exploits appeared, in this blog post we'll walk-through the vulnerability and Samuel's Proof-of-concept exploit in detail.

tetris with sed

You can detach a process from terminal by adding &! at the end of a command !
Thank you brieuc !

Some example , how to use pseudo terminals

This is the web site for the Third Edition of Linux Device Drivers, by Jonathan Corbet, Alessandro Rubini, and Greg Kroah-Hartman.

echo "NICK pingbot" > pingbot.input # what nick
echo "USER pingbot +iw pingbot :$0" >> pingbot.input
echo "JOIN #tdobson.net" >> pingbot.input # what channel

tail -f pingbot.input | telnet irc.freenode.net 6667

Some info on how malloc works

chroot made easy in 2 commands

Share your connection with other computers

When optimizing memory access, and memory cache misses in particular, there are surprisingly few tools to help you. valgrind’s cachegrind tool is the closest one I’ve found. It gives you a lot of information on cache misses, but not necessarily in the form you need it.