Integer overflow in the _ctl_do_mpt_command function in drivers/scsi/mpt2sas/mpt2sas_ctl.c in the Linux kernel 2.6.38 and earlier might allow local users to gain privileges or cause a denial of service (memory corruption) via an ioctl call specifying a crafted value that triggers a heap-based buffer overflow.
https://patchwork.kernel.org/patch/688021/
https://bugzilla.redhat.com/show_bug.cgi?id=694021
http://www.vmware.com/security/advisories/VMSA-2011-0012.html
http://www.securityfocus.com/bid/47185
http://www.securityfocus.com/archive/1/520102/100/0/threaded
http://secunia.com/advisories/46397
http://rhn.redhat.com/errata/RHSA-2011-0833.html
http://openwall.com/lists/oss-security/2011/04/06/2
http://openwall.com/lists/oss-security/2011/04/05/32
http://lkml.org/lkml/2011/4/5/327
http://lists.opensuse.org/opensuse-security-announce/2015-04/msg00020.html