UB creating a reference with an under-aligned address

[programmerjake]

Describe the bug

x86_64-pc-windows-gnu
sysinfo-0.29.4

more details starting here:
retep998/winapi-rs#1043 (comment)

[LunNova]

It looks like there's more UB here, set_len is used before calling NtQuerySystemInformation or confirming the ntstatus value so can be pointing at uninitialized memory and the docs require "The elements at old_len..new_len must be initialized."

If ntstatus is an error value that isn't STATUS_INFO_LENGTH_MISMATCH the error is logged but ignored and then uninitialized memory is accessed.

[GuillaumeGomez]

Thanks for reporting the bug and for the extra details! PRs are very welcome, otherwise I'll get to it in a few days.

[GuillaumeGomez]

I released 0.29.5 with the fix from #1010. I'll close this issue for the time being but if the problem is still there, please re-open it.