The arch_dup_task_struct function in the Transactional Memory (TM) implementation in arch/powerpc/kernel/process.c in the Linux kernel before 3.13.7 on the powerpc platform does not properly interact with the clone and fork system calls, which allows local users to cause a denial of service (Program Check and system crash) via certain instructions that are executed with the processor in the Transactional state.
http://secunia.com/advisories/57436
https://exchange.xforce.ibmcloud.com/vulnerabilities/92113
https://github.com/torvalds/linux/commit/621b5060e823301d0cba4cb52a7ee3491922d291
https://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.12.15
http://www.kernel.org/pub/linux/kernel/v3.x/ChangeLog-3.13.7