linux-kernel - [PATCH v2] clk: rockchip: Fix memory leak in rockchip_clk_register

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Date:   Wed, 23 Nov 2022 17:12:01 +0800
From:   Xiu Jianfeng <xiujianfeng@...wei.com>
To:     <mturquette@...libre.com>, <sboyd@...nel.org>, <heiko@...ech.de>,
        <mturquette@...aro.org>
CC:     <linux-clk@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-rockchip@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
Subject: [PATCH v2] clk: rockchip: Fix memory leak in rockchip_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: 90c590254051 ("clk: rockchip: add clock type for pll clocks and pll used on rk3066")
Signed-off-by: Xiu Jianfeng <xiujianfeng@...wei.com>

---
v2: move kfree(pll->rate_table) to the err_pll block
---
 drivers/clk/rockchip/clk-pll.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clk/rockchip/clk-pll.c b/drivers/clk/rockchip/clk-pll.c
index 4b9840994295..2d42eb628926 100644
--- a/drivers/clk/rockchip/clk-pll.c
+++ b/drivers/clk/rockchip/clk-pll.c
@@ -1197,6 +1197,7 @@ struct clk *rockchip_clk_register_pll(struct rockchip_clk_provider *ctx,
 	return mux_clk;
 
 err_pll:
+	kfree(pll->rate_table);
 	clk_unregister(mux_clk);
 	mux_clk = pll_clk;
 err_mux:
-- 
2.17.1