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[PATCH v2] scsi: csiostor: Use kcalloc() instead of kzalloc()

Erick Archer posted 1 patch 1 year, 11 months ago 
drivers/scsi/csiostor/csio_init.c | 15 +++++----------
1 file changed, 5 insertions(+), 10 deletions(-)
[PATCH v2] scsi: csiostor: Use kcalloc() instead of kzalloc()
Posted by Erick Archer 1 year, 11 months ago 
Use 2-factor multiplication argument form kcalloc() instead
of kzalloc().

Also, it is preferred to use sizeof(*pointer) instead of
sizeof(type) due to the type of the variable can change and
one needs not change the former (unlike the latter).

Link: https://github.com/KSPP/linux/issues/162
Signed-off-by: Erick Archer <erick.archer@gmx.com>
---
Changes in v2:
- Update the changelog text describing the sizeof()
  changes (Gustavo A. R. Silva)

Version 1:
Link: https://lore.kernel.org/linux-hardening/20240112182603.11048-1-erick.archer@gmx.com/
---
 drivers/scsi/csiostor/csio_init.c | 15 +++++----------
 1 file changed, 5 insertions(+), 10 deletions(-)

diff --git a/drivers/scsi/csiostor/csio_init.c b/drivers/scsi/csiostor/csio_init.c
index d649b7a2a879..d72892e44fd1 100644
--- a/drivers/scsi/csiostor/csio_init.c
+++ b/drivers/scsi/csiostor/csio_init.c
@@ -698,8 +698,7 @@ csio_lnodes_block_request(struct csio_hw *hw)
 	struct csio_lnode **lnode_list;
 	int cur_cnt = 0, ii;

-	lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
-			GFP_KERNEL);
+	lnode_list = kcalloc(hw->num_lns, sizeof(*lnode_list), GFP_KERNEL);
 	if (!lnode_list) {
 		csio_err(hw, "Failed to allocate lnodes_list");
 		return;
@@ -737,8 +736,7 @@ csio_lnodes_unblock_request(struct csio_hw *hw)
 	struct csio_lnode **lnode_list;
 	int cur_cnt = 0, ii;

-	lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
-			GFP_KERNEL);
+	lnode_list = kcalloc(hw->num_lns, sizeof(*lnode_list), GFP_KERNEL);
 	if (!lnode_list) {
 		csio_err(hw, "Failed to allocate lnodes_list");
 		return;
@@ -775,8 +773,7 @@ csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid)
 	struct csio_lnode **lnode_list;
 	int cur_cnt = 0, ii;

-	lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
-			GFP_KERNEL);
+	lnode_list = kcalloc(hw->num_lns, sizeof(*lnode_list), GFP_KERNEL);
 	if (!lnode_list) {
 		csio_err(hw, "Failed to allocate lnodes_list");
 		return;
@@ -816,8 +813,7 @@ csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid)
 	struct csio_lnode **lnode_list;
 	int cur_cnt = 0, ii;

-	lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
-			GFP_KERNEL);
+	lnode_list = kcalloc(hw->num_lns, sizeof(*lnode_list), GFP_KERNEL);
 	if (!lnode_list) {
 		csio_err(hw, "Failed to allocate lnodes_list");
 		return;
@@ -855,8 +851,7 @@ csio_lnodes_exit(struct csio_hw *hw, bool npiv)
 	struct csio_lnode **lnode_list;
 	int cur_cnt = 0, ii;

-	lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
-			GFP_KERNEL);
+	lnode_list = kcalloc(hw->num_lns, sizeof(*lnode_list), GFP_KERNEL);
 	if (!lnode_list) {
 		csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n");
 		return;
--
2.25.1
Re: [PATCH v2] scsi: csiostor: Use kcalloc() instead of kzalloc()
Posted by Gustavo A. R. Silva 1 year, 11 months ago 

On 1/14/24 04:24, Erick Archer wrote:
> Use 2-factor multiplication argument form kcalloc() instead
> of kzalloc().
> 
> Also, it is preferred to use sizeof(*pointer) instead of
> sizeof(type) due to the type of the variable can change and
> one needs not change the former (unlike the latter).
> 
> Link: https://github.com/KSPP/linux/issues/162
> Signed-off-by: Erick Archer <erick.archer@gmx.com>

Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org>

Thanks!
-- 
Gustavo

> ---
> Changes in v2:
> - Update the changelog text describing the sizeof()
>    changes (Gustavo A. R. Silva)
> 
> Version 1:
> Link: https://lore.kernel.org/linux-hardening/20240112182603.11048-1-erick.archer@gmx.com/
> ---
>   drivers/scsi/csiostor/csio_init.c | 15 +++++----------
>   1 file changed, 5 insertions(+), 10 deletions(-)
> 
> diff --git a/drivers/scsi/csiostor/csio_init.c b/drivers/scsi/csiostor/csio_init.c
> index d649b7a2a879..d72892e44fd1 100644
> --- a/drivers/scsi/csiostor/csio_init.c
> +++ b/drivers/scsi/csiostor/csio_init.c
> @@ -698,8 +698,7 @@ csio_lnodes_block_request(struct csio_hw *hw)
>   	struct csio_lnode **lnode_list;
>   	int cur_cnt = 0, ii;
> 
> -	lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
> -			GFP_KERNEL);
> +	lnode_list = kcalloc(hw->num_lns, sizeof(*lnode_list), GFP_KERNEL);
>   	if (!lnode_list) {
>   		csio_err(hw, "Failed to allocate lnodes_list");
>   		return;
> @@ -737,8 +736,7 @@ csio_lnodes_unblock_request(struct csio_hw *hw)
>   	struct csio_lnode **lnode_list;
>   	int cur_cnt = 0, ii;
> 
> -	lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
> -			GFP_KERNEL);
> +	lnode_list = kcalloc(hw->num_lns, sizeof(*lnode_list), GFP_KERNEL);
>   	if (!lnode_list) {
>   		csio_err(hw, "Failed to allocate lnodes_list");
>   		return;
> @@ -775,8 +773,7 @@ csio_lnodes_block_by_port(struct csio_hw *hw, uint8_t portid)
>   	struct csio_lnode **lnode_list;
>   	int cur_cnt = 0, ii;
> 
> -	lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
> -			GFP_KERNEL);
> +	lnode_list = kcalloc(hw->num_lns, sizeof(*lnode_list), GFP_KERNEL);
>   	if (!lnode_list) {
>   		csio_err(hw, "Failed to allocate lnodes_list");
>   		return;
> @@ -816,8 +813,7 @@ csio_lnodes_unblock_by_port(struct csio_hw *hw, uint8_t portid)
>   	struct csio_lnode **lnode_list;
>   	int cur_cnt = 0, ii;
> 
> -	lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
> -			GFP_KERNEL);
> +	lnode_list = kcalloc(hw->num_lns, sizeof(*lnode_list), GFP_KERNEL);
>   	if (!lnode_list) {
>   		csio_err(hw, "Failed to allocate lnodes_list");
>   		return;
> @@ -855,8 +851,7 @@ csio_lnodes_exit(struct csio_hw *hw, bool npiv)
>   	struct csio_lnode **lnode_list;
>   	int cur_cnt = 0, ii;
> 
> -	lnode_list = kzalloc((sizeof(struct csio_lnode *) * hw->num_lns),
> -			GFP_KERNEL);
> +	lnode_list = kcalloc(hw->num_lns, sizeof(*lnode_list), GFP_KERNEL);
>   	if (!lnode_list) {
>   		csio_err(hw, "lnodes_exit: Failed to allocate lnodes_list.\n");
>   		return;
> --
> 2.25.1
> 
>

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