clk: hisilicon: Use devm_kcalloc() instead of devm_kzalloc()

As noted in the "Deprecated Interfaces, Language Features, Attributes,
and Conventions" documentation [1], size calculations (especially
multiplication) should not be performed in memory allocator (or similar)
function arguments due to the risk of them overflowing. This could lead
to values wrapping around and a smaller allocation being made than the
caller was expecting. Using those allocations could lead to linear
overflows of heap memory and other misbehaviors.

So, use the purpose specific devm_kcalloc() function instead of the
argument size * count in the devm_kzalloc() function.

Link: https://www.kernel.org/doc/html/next/process/deprecated.html#open-coded-arithmetic-in-allocator-arguments [1]
Link: https://github.com/KSPP/linux/issues/162
Signed-off-by: Erick Archer <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Reviewed-by: Uwe Kleine-König <[email protected]>
Reviewed-by: Gustavo A. R. Silva <[email protected]>
Signed-off-by: Stephen Boyd <[email protected]>

1 files changed, 1 insertions, 2 deletions

diff --git a/drivers/clk/hisilicon/clk-hi3559a.c b/drivers/clk/hisilicon/clk-hi3559a.c
index 4623befafaec..c79a94f6d9d2 100644
--- a/drivers/clk/hisilicon/clk-hi3559a.c
+++ b/drivers/clk/hisilicon/clk-hi3559a.c
@@ -461,8 +461,7 @@ static void hisi_clk_register_pll(struct hi3559av100_pll_clock *clks,
 	struct clk_init_data init;
 	int i;
 
-	p_clk = devm_kzalloc(dev, sizeof(*p_clk) * nums, GFP_KERNEL);
-
+	p_clk = devm_kcalloc(dev, nums, sizeof(*p_clk), GFP_KERNEL);
 	if (!p_clk)
 		return;