On Tue, 2019-01-08 at 11:17 -0600, Gustavo A. R. Silva 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;
    void *entry[];
};

instance = kzalloc(sizeof(struct foo) + sizeof(void *) * count,
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);

This code was detected with the help of Coccinelle.

Signed-off-by: Gustavo A. R. Silva <redacted>
---

Applied to our internal tree, thanks! It will reach the mainline
following our normal upstreaming process.

--
Luca.