linux-kernel - [PATCH] clk: samsung: Fix memory leak in _samsung_clk_register

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Message-ID: <20221123032015.63980-1-xiujianfeng@huawei.com>
Date:   Wed, 23 Nov 2022 11:20:15 +0800
From:   Xiu Jianfeng <xiujianfeng@...wei.com>
To:     <krzysztof.kozlowski@...aro.org>, <s.nawrocki@...sung.com>,
        <tomasz.figa@...il.com>, <cw00.choi@...sung.com>,
        <alim.akhtar@...sung.com>, <mturquette@...libre.com>,
        <sboyd@...nel.org>, <dianders@...omium.org>,
        <yadi.brar@...sung.com>, <mturquette@...aro.org>
CC:     <linux-samsung-soc@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH] clk: samsung: Fix memory leak in _samsung_clk_register_pll()

If clk_register() fails, @pll->rate_table may have allocated memory by
kmemdup(), so it needs to be freed, otherwise will cause memory leak
issue, this patch fixes it.

Fixes: 3ff6e0d8d64d ("clk: samsung: Add support to register rate_table for samsung plls")
Signed-off-by: Xiu Jianfeng <xiujianfeng@...wei.com>
---
 drivers/clk/samsung/clk-pll.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/samsung/clk-pll.c b/drivers/clk/samsung/clk-pll.c
index fe383471c5f0..0ff28938943f 100644
--- a/drivers/clk/samsung/clk-pll.c
+++ b/drivers/clk/samsung/clk-pll.c
@@ -1583,6 +1583,7 @@ static void __init _samsung_clk_register_pll(struct samsung_clk_provider *ctx,
 	if (ret) {
 		pr_err("%s: failed to register pll clock %s : %d\n",
 			__func__, pll_clk->name, ret);
+		kfree(pll->rate_table);
 		kfree(pll);
 		return;
 	}
-- 
2.17.1