linux kernel developers and gcc developers, they need to talk with each other.
linux kernel doesn't work fine with latest gcc compiler, it happened from time to time.
This bug is no real threat, moreover, by the time this new version of gcc is used to compile programs, the problem will have been fixed, secondly it only effects programs that uses signal handlers, and also use memmove() (or a function that uses and relies on the DF flag), before and within the signal handler. Also there is no escalation of privileges, and will only run at the current users privileges.
Microsoft: "let everyone run after us. We'll just INNOV~1"