The Reliable Datagram Sockets (RDS) subsystem in the Linux kernel before 2.6.38 does not properly handle congestion map updates, which allows local users to cause a denial of service (BUG_ON and system crash) via vectors involving (1) a loopback (aka loop) transmit operation or (2) an InfiniBand (aka ib) transmit operation.
https://bugzilla.redhat.com/show_bug.cgi?id=680345
http://www.openwall.com/lists/oss-security/2011/03/03/2
http://ftp.osuosl.org/pub/linux/kernel/v2.6/ChangeLog-2.6.38