diff mbox series

[v2] iwlwifi: dvm: use struct_size over open coded arithmetic

Message ID 20220128093147.1213351-1-chi.minghao@zte.com.cn (mailing list archive)
State Superseded
Delegated to: Netdev Maintainers
Headers show
Series [v2] iwlwifi: dvm: use struct_size over open coded arithmetic | expand

Checks

Context Check Description
netdev/tree_selection success Not a local patch

Commit Message

CGEL Jan. 28, 2022, 9:31 a.m. UTC 
From: Minghao Chi (CGEL ZTE) <chi.minghao@zte.com.cn>

Replace zero-length array with flexible-array member and make use
of the struct_size() helper in kmalloc(). For example:

struct iwl_wipan_noa_data {
	...
	u8 data[];
}

Make use of the struct_size() helper instead of an open-coded version
in order to avoid any potential type mistakes.

Reported-by: Zeal Robot <zealci@zte.com.cn>
Signed-off-by: Minghao Chi (CGEL ZTE) <chi.minghao@zte.com.cn>
---
 drivers/net/wireless/intel/iwlwifi/dvm/rx.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Luca Coelho Jan. 28, 2022, 12:34 p.m. UTC | #1 
On Fri, 2022-01-28 at 09:31 +0000, cgel.zte@gmail.com wrote:
> From: Minghao Chi (CGEL ZTE) <chi.minghao@zte.com.cn>
> 
> Replace zero-length array with flexible-array member and make use
> of the struct_size() helper in kmalloc(). For example:

You're not replacing zero-length arrays in this patch, so this is not
correct.  Probably a copy/paste from a different patch?

--
Cheers,
Luca.
diff mbox series

Patch

diff --git a/drivers/net/wireless/intel/iwlwifi/dvm/rx.c b/drivers/net/wireless/intel/iwlwifi/dvm/rx.c
index db0c41bbeb0e..d0d842b25b86 100644
--- a/drivers/net/wireless/intel/iwlwifi/dvm/rx.c
+++ b/drivers/net/wireless/intel/iwlwifi/dvm/rx.c
@@ -915,7 +915,7 @@  static void iwlagn_rx_noa_notification(struct iwl_priv *priv,
 		len += 1 + 2;
 		copylen += 1 + 2;
 
-		new_data = kmalloc(sizeof(*new_data) + len, GFP_ATOMIC);
+		new_data = kmalloc(struct_size(*new_data, data, len), GFP_ATOMIC);
 		if (new_data) {
 			new_data->length = len;
 			new_data->data[0] = WLAN_EID_VENDOR_SPECIFIC;