clk: hi3620: Fix memory leak in hi3620_mmc_clk_init()

In cases where kcalloc() fails for the 'clk_data->clks' allocation, the
code path does not handle the failure gracefully, potentially leading
to a memory leak. This fix ensures proper cleanup by freeing the
allocated memory for 'clk_data' before returning.

Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Link: https://lore.kernel.org/r/20231210165040.3407545-1-visitorckw@gmail.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>

diff --git a/drivers/clk/hisilicon/clk-hi3620.c b/drivers/clk/hisilicon/clk-hi3620.c
index 2d7186905abdc07c8bcc41dff6fc40723c5050ef..5d0226530fdb2f5edaf3397fcc15ae90151cc2bd 100644 (file)
--- a/drivers/clk/hisilicon/clk-hi3620.c
+++ b/drivers/clk/hisilicon/clk-hi3620.c
@@ -466,8 +466,10 @@ static void __init hi3620_mmc_clk_init(struct device_node *node)
                return;
 
        clk_data->clks = kcalloc(num, sizeof(*clk_data->clks), GFP_KERNEL);
-       if (!clk_data->clks)
+       if (!clk_data->clks) {
+               kfree(clk_data);
                return;
+       }
 
        for (i = 0; i < num; i++) {
                struct hisi_mmc_clock *mmc_clk = &hi3620_mmc_clks[i];