Off-by-one error in the bpf_jit_compile function in arch/x86/net/bpf_jit_comp.c in the Linux kernel before 3.1.8, when BPF JIT is enabled, allows local users to cause a denial of service (system crash) or possibly gain privileges via a long jump after a conditional jump.
https://github.com/torvalds/linux/commit/a03ffcf873fe0f2565386ca8ef832144c42e67fa
http://www.openwall.com/lists/oss-security/2014/04/18/6