Comment by MuffinFlavored
2 days ago
> OpenBSD uses 0xdb to fill newly allocated memory and 0xdf to fill memory upon being freed. This helps developers catch "use-before-initialization" (seeing 0xdb) and "use-after-free" (seeing 0xdf) bugs quickly.
Looks like this is the default in OpenBSD.
I like this. The only information leaking is whether the memory range was previously used. I suppose you may want to control for that. I'd be surprised if OpenBSD didn't provide a flag to just freed memory to the same value as never allocated.