Re: [PATCH v2 0/8] slab: provide and use krealloc_array()

On Mon, 2020-11-02 at 16:20 +0100, Bartosz Golaszewski wrote:

From: Bartosz Golaszewski <redacted>

Andy brought to my attention the fact that users allocating an array of
equally sized elements should check if the size multiplication doesn't
overflow. This is why we have helpers like kmalloc_array().

However we don't have krealloc_array() equivalent and there are many
users who do their own multiplication when calling krealloc() for arrays.

This series provides krealloc_array() and uses it in a couple places.

My concern about this is a possible assumption that __GFP_ZERO will
work, and as far as I know, it will not.