Data corruption of ELF section in the loaded kernel module

Issue

• The RHSA-2011:1530 kernel update introduced a  regression in the way the Linux kernel maps ELF headers for kernel  modules into kernel memory.  If a third-party kernel module is compiled  on a RHEL system with a kernel prior to RHSA-2011:1530, then loading  that module on a system with kernel RHSA-2011:1530 would result in  corruption of one byte in the memory reserved for the module.  In some  cases, this could prevent the module from functioning correctly.  The problem causes a kernel data corruption which, under certain circumstances, might lead to serious consequences such as a kernel panic.