On 05/08/2018 05:42 PM, Kees Cook wrote:
This is a stab at providing three new helpers for allocation size
calculation:
struct_size(), array_size(), and array3_size().
These are implemented on top of Rasmus's overflow checking functions,
and the last 8 patches are all treewide conversions of open-coded
multiplications into the various combinations of the helper functions.
-Kees
Obvious question (that might indicate this deserves documentation?)
What's the difference between
kmalloc_array(cnt, sizeof(struct blah), GFP_KERNEL);
and
kmalloc(array_size(cnt, struct blah), GFP_KERNEL);
and when would you use one over the other?
Thanks,
Laura