[asherkin]

It appears to be that the mprotect call hasn't taken affect somehow, and the memory is still write-protected.

It's worth noting that PROT_WRITE|PROT_EXEC can be problematic with certain security modules, you might have more luck making it write-only, patching, then switching back to read-and-exec.

The fact the problem came about in a game update makes problems here unlikely unless they've accidentally compiled the server binaries with CEG or something.