"Gustavo A. R. Silva" <gustavo@xxxxxxxxxxxxxx> wrote:
> One of the more common cases of allocation size calculations is finding
> the size of a structure that has a zero-sized array at the end, along
> with memory for some number of elements for that array. For example:
>
> struct foo {
> int stuff;
> struct boo entry[];
> };
>
> size = sizeof(struct foo) + count * sizeof(struct boo);
> instance = kzalloc(size, GFP_KERNEL)
>
> Instead of leaving these open-coded and prone to type mistakes, we can
> now use the new struct_size() helper:
>
> instance = kzalloc(struct_size(instance, entry, count), GFP_KERNEL)
>
> Notice that, in this case, variable reqsz is not necessary,
> hence it is removed.
>
> This code was detected with the help of Coccinelle.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@xxxxxxxxxxxxxx>
Patch applied to wireless-drivers-next.git, thanks.
0cf83903aad0 brcmfmac: Use struct_size() in kzalloc()
--
https://patchwork.kernel.org/patch/10884189/
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
