On Mon, 2014-12-01 at 02:34 +0100, SF Markus Elfring wrote: > > Some of those NULL pointer checks on input parameters may have been > > added subsequently to functions. So there may be older kernel versions > > out there in which those checks dont exists in some cases. If some of > > the now "cleaned up" code is backported to such a kernel chances are > > good that those missing checks are overseen. And then neither caller nor > > callee is doing the NULL pointer check. > I assume that a few backporters can tell you more about their corresponding > software development experiences. > http://www.do-not-panic.com/2014/04/automatic-linux-kernel-backporting-with-coccinelle.html In such cases we just provide an appropriate wrapper and replace callers of the original function by callers of the wrapper, typically with a #define. So this kind of evolution is no problem for the (automated) backports using the backports project - although it can be difficult to detect such a thing is needed. johannes -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
