Re: Usage of strncpy in the kernel

On Tue, 7 Jan 2025, Martin Husemann wrote:

> On Tue, Jan 07, 2025 at 07:58:11PM +0000, nia wrote:
>> On Mon, Jan 06, 2025 at 03:23:45PM -0500, Mouse wrote:
>>> No, that's not all.  It also fills the rest, if any, of the destination
>>> space with more NULs.  (This can be useful to, for example, prevent
>>> leaking kernel stack trash to userland.)
>>
>> Unfortunately modern compilers no longer guarantee this is true.
>
> What are you refereing to?
>

Over-aggressive dead store elimination (DSE) by compilers, I think. But, I
would categorize these as bugs if they change strncpy() semantics.

-RVP