[PATCH linux-next] tee/optee/shm_pool: fix application of sizeof to pointer

[PATCH linux-next] tee/optee/shm_pool: fix application of sizeof to pointer

[CGEL]

From: jing yangyang <jing.yangyang@zte.com.cn>

sizeof when applied to a pointer typed expression gives the size of
the pointer.

./drivers/tee/optee/shm_pool.c:38:28-34: ERROR application of sizeof to pointer

This issue was detected with the help of Coccinelle.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: jing yangyang <jing.yangyang@zte.com.cn>
---
 drivers/tee/optee/shm_pool.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/tee/optee/shm_pool.c b/drivers/tee/optee/shm_pool.c
index c41a9a5..d167039 100644
--- a/drivers/tee/optee/shm_pool.c
+++ b/drivers/tee/optee/shm_pool.c
@@ -35,7 +35,7 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
 		unsigned int nr_pages = 1 << order, i;
 		struct page **pages;
 
-		pages = kcalloc(nr_pages, sizeof(pages), GFP_KERNEL);
+		pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL);
 		if (!pages) {
 			rc = -ENOMEM;
 			goto err;
-- 
1.8.3.1

Re: [PATCH linux-next] tee/optee/shm_pool: fix application of sizeof to pointer

[Daniel Thompson]

On Thu, Aug 19, 2021 at 08:21:27PM -0700, CGEL wrote:
> From: jing yangyang <jing.yangyang@zte.com.cn>
> 
> sizeof when applied to a pointer typed expression gives the size of
> the pointer.
> 
> ./drivers/tee/optee/shm_pool.c:38:28-34: ERROR application of sizeof to pointer
> 
> This issue was detected with the help of Coccinelle.
> 
> Reported-by: Zeal Robot <zealci@zte.com.cn>
> Signed-off-by: jing yangyang <jing.yangyang@zte.com.cn>

This should not affect code generation since both pages and *pages are
pointers but the change looks good to me.

Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>


> ---
>  drivers/tee/optee/shm_pool.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/tee/optee/shm_pool.c b/drivers/tee/optee/shm_pool.c
> index c41a9a5..d167039 100644
> --- a/drivers/tee/optee/shm_pool.c
> +++ b/drivers/tee/optee/shm_pool.c
> @@ -35,7 +35,7 @@ static int pool_op_alloc(struct tee_shm_pool_mgr *poolm,
>  		unsigned int nr_pages = 1 << order, i;
>  		struct page **pages;
>  
> -		pages = kcalloc(nr_pages, sizeof(pages), GFP_KERNEL);
> +		pages = kcalloc(nr_pages, sizeof(*pages), GFP_KERNEL);
>  		if (!pages) {
>  			rc = -ENOMEM;
>  			goto err;
> -- 
> 1.8.3.1

Re: [PATCH linux-next] tee/optee/shm_pool: fix application of sizeof to pointer

[Jens Wiklander]

On Thu, Sep 02, 2021 at 11:34:28AM +0100, Daniel Thompson wrote:
> On Thu, Aug 19, 2021 at 08:21:27PM -0700, CGEL wrote:
> > From: jing yangyang <jing.yangyang@zte.com.cn>
> > 
> > sizeof when applied to a pointer typed expression gives the size of
> > the pointer.
> > 
> > ./drivers/tee/optee/shm_pool.c:38:28-34: ERROR application of sizeof to pointer
> > 
> > This issue was detected with the help of Coccinelle.
> > 
> > Reported-by: Zeal Robot <zealci@zte.com.cn>
> > Signed-off-by: jing yangyang <jing.yangyang@zte.com.cn>
> 
> This should not affect code generation since both pages and *pages are
> pointers but the change looks good to me.
> 
> Reviewed-by: Daniel Thompson <daniel.thompson@linaro.org>

Thanks for reviewing, I agree with your analysis. 
I'm picking this up as a bugfix for V5.15.

Cheers,
Jens