Both this and parent comment about PA-RISC are very interesting.
As noted, stack growing up doesn't prevent all stack overflows, but it makes it less trivially easy to overwrite a return address. Bounded strings also made it less trivially easy to create string buffer overflows.
As noted, stack growing up doesn't prevent all stack overflows, but it makes it less trivially easy to overwrite a return address. Bounded strings also made it less trivially easy to create string buffer overflows.