2017-09-14 12:06:38

by Srishti Sharma

Subject: [PATCH] Staging: lustre: obdclass: Use kcalloc instead of kzalloc

Use kcalloc instead of kzalloc to check for overflow before
multiplication. Done using the following semantic patch by
coccinelle.

http://coccinelle.lip6.fr/rules/kzalloc.cocci

Signed-off-by: Srishti Sharma <[email protected]>
---
drivers/staging/lustre/lustre/obdclass/cl_object.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/staging/lustre/lustre/obdclass/cl_object.c b/drivers/staging/lustre/lustre/obdclass/cl_object.c
index 95c7fa3..28cb8489 100644
--- a/drivers/staging/lustre/lustre/obdclass/cl_object.c
+++ b/drivers/staging/lustre/lustre/obdclass/cl_object.c
@@ -1016,7 +1016,7 @@ int cl_global_init(void)
{
int result;

- cl_envs = kzalloc(sizeof(*cl_envs) * num_possible_cpus(), GFP_KERNEL);
+ cl_envs = kcalloc(num_possible_cpus(), sizeof(*cl_envs), GFP_KERNEL);
if (!cl_envs) {
result = -ENOMEM;
goto out;
--
2.7.4

2017-09-14 12:31:23

by Julia Lawall

Subject: Re: [Outreachy kernel] [PATCH] Staging: lustre: obdclass: Use kcalloc instead of kzalloc

On Thu, 14 Sep 2017, Srishti Sharma wrote:

> Use kcalloc instead of kzalloc to check for overflow before
> multiplication. Done using the following semantic patch by
> coccinelle.
>
> http://coccinelle.lip6.fr/rules/kzalloc.cocci
>
> Signed-off-by: Srishti Sharma <[email protected]>

Acked-by: Julia Lawall <[email protected]>

> ---
> drivers/staging/lustre/lustre/obdclass/cl_object.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/lustre/lustre/obdclass/cl_object.c b/drivers/staging/lustre/lustre/obdclass/cl_object.c
> index 95c7fa3..28cb8489 100644
> --- a/drivers/staging/lustre/lustre/obdclass/cl_object.c
> +++ b/drivers/staging/lustre/lustre/obdclass/cl_object.c
> @@ -1016,7 +1016,7 @@ int cl_global_init(void)
> {
> int result;
>
> - cl_envs = kzalloc(sizeof(*cl_envs) * num_possible_cpus(), GFP_KERNEL);
> + cl_envs = kcalloc(num_possible_cpus(), sizeof(*cl_envs), GFP_KERNEL);
> if (!cl_envs) {
> result = -ENOMEM;
> goto out;
> --
> 2.7.4
>
> --
> You received this message because you are subscribed to the Google Groups "outreachy-kernel" group.
> To unsubscribe from this group and stop receiving emails from it, send an email to [email protected].
> To post to this group, send email to [email protected].
> To view this discussion on the web visit https://groups.google.com/d/msgid/outreachy-kernel/1505390789-3814-1-git-send-email-srishtishar%40gmail.com.
> For more options, visit https://groups.google.com/d/optout.
>