On Thu, Nov 29, 2012 at 11:29:25AM -0800, Kent Overstreet wrote: > There's some kind of symmetry going on here, and if I'd been awake more > in college I could probably say exactly why it works, but it does. I think the catch is that using only a 32 bit counter is something the user could arbitrarily control the sum of all parts. I think a 64 bit counter may be required to ensure no overflow occurs. Otherwise, an overflow could result in a premature free when there are still 2^32 objects active thanks to a malicious user (possible on systems with lots of memory these days -- remote, but possible). -ben -- "Thought is the essence of where you are now." -- To unsubscribe from this list: send the line "unsubscribe linux-fsdevel" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
