[PATCH v4 1/3] mm/slab: Use memzero_explicit() in kzfree()
dhowells at redhat.com
Tue Jun 16 17:46:40 CEST 2020
Waiman Long <longman at redhat.com> wrote:
> The kzfree() function is normally used to clear some sensitive
> information, like encryption keys, in the buffer before freeing it back
> to the pool. Memset()
"memset()" is all lowercase.
> is currently used for buffer clearing. However unlikely, there is still a
> non-zero probability
I'd say "a possibility".
and I'd move "in [the] future" here.
> the compiler may choose to optimize away the
> memory clearing especially if LTO is being used in the future. To make sure
> that this optimization will never happen
"in these cases"
> , memzero_explicit(), which is introduced in v3.18, is now used in
> kzfree() to future-proof it.
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