linux-kernel - [PATCH] clk: hi3620: Fix memory leak in hi3620_mmc_clk

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Message-Id: <20231210165040.3407545-1-visitorckw@gmail.com>
Date:   Mon, 11 Dec 2023 00:50:40 +0800
From:   Kuan-Wei Chiu <visitorckw@...il.com>
To:     mturquette@...libre.com, sboyd@...nel.org
Cc:     robh@...nel.org, abel.vesa@...aro.org, dinguyen@...nel.org,
        linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kuan-Wei Chiu <visitorckw@...il.com>
Subject: [PATCH] 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@...il.com>
---
 drivers/clk/hisilicon/clk-hi3620.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/clk/hisilicon/clk-hi3620.c b/drivers/clk/hisilicon/clk-hi3620.c
index 2d7186905abd..5d0226530fdb 100644
--- 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];
-- 
2.25.1