linux-kernel - [PATCH v2] firmware: microchip: Fix over-requested allocation size

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Date: Mon,  4 Mar 2024 18:16:53 +0800
From: Dawei Li <dawei.li@...ngroup.cn>
To: conor.dooley@...rochip.com,
	daire.mcnamara@...rochip.com
Cc: linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org,
	Dawei Li <dawei.li@...ngroup.cn>,
	kernel test robot <lkp@...el.com>
Subject: [PATCH v2] firmware: microchip: Fix over-requested allocation size

cocci warnings: (new ones prefixed by >>)
>> drivers/firmware/microchip/mpfs-auto-update.c:387:72-78:
   ERROR: application of sizeof to pointer
   drivers/firmware/microchip/mpfs-auto-update.c:170:72-78:
   ERROR: application of sizeof to pointer

response_msg is a pointer to u32, so the size of element it points to is
supposed to be a multiple of sizeof(u32), rather than sizeof(u32 *).

Reported-by: kernel test robot <lkp@...el.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202403040516.CYxoWTXw-lkp@intel.com/
Signed-off-by: Dawei Li <dawei.li@...ngroup.cn>
---

V1 -> V2:
sizeof(u32)->sizeof(*response_msg) 

V1:
https://lore.kernel.org/lkml/20240304092532.125751-1-dawei.li@shingroup.cn/

 drivers/firmware/microchip/mpfs-auto-update.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/firmware/microchip/mpfs-auto-update.c b/drivers/firmware/microchip/mpfs-auto-update.c
index 682e417be5a3..fbeeaee4ac85 100644
--- a/drivers/firmware/microchip/mpfs-auto-update.c
+++ b/drivers/firmware/microchip/mpfs-auto-update.c
@@ -384,7 +384,8 @@ static int mpfs_auto_update_available(struct mpfs_auto_update_priv *priv)
 	u32 *response_msg;
 	int ret;
 
-	response_msg = devm_kzalloc(priv->dev, AUTO_UPDATE_FEATURE_RESP_SIZE * sizeof(response_msg),
+	response_msg = devm_kzalloc(priv->dev,
+				    AUTO_UPDATE_FEATURE_RESP_SIZE * sizeof(*response_msg),
 				    GFP_KERNEL);
 	if (!response_msg)
 		return -ENOMEM;
-- 
2.27.0