linux-kernel - [PATCH] clk/meson: fixes memleak issue in init err branch

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Message-Id: <20200429031416.3900-1-bernard@vivo.com>
Date:   Tue, 28 Apr 2020 20:14:15 -0700
From:   Bernard Zhao <bernard@...o.com>
To:     Neil Armstrong <narmstrong@...libre.com>,
        Jerome Brunet <jbrunet@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Kevin Hilman <khilman@...libre.com>,
        linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Cc:     opensource.kernel@...o.com, Bernard Zhao <bernard@...o.com>
Subject: [PATCH] clk/meson: fixes memleak issue in init err branch

In common init function, when run into err branch, we didn`t
use kfree to release kzmalloc area, this may bring in memleak

Signed-off-by: Bernard Zhao <bernard@...o.com>
---
 drivers/clk/meson/meson8b.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/clk/meson/meson8b.c b/drivers/clk/meson/meson8b.c
index 34a70c4b4899..0f07d5a4cd16 100644
--- a/drivers/clk/meson/meson8b.c
+++ b/drivers/clk/meson/meson8b.c
@@ -3687,6 +3687,7 @@ static void __init meson8b_clkc_init_common(struct device_node *np,
 	if (ret) {
 		pr_err("%s: Failed to register clkc reset controller: %d\n",
 		       __func__, ret);
+		kfree(rstc);
 		return;
 	}
 
@@ -3710,8 +3711,10 @@ static void __init meson8b_clkc_init_common(struct device_node *np,
 			continue;
 
 		ret = of_clk_hw_register(np, clk_hw_onecell_data->hws[i]);
-		if (ret)
+		if (ret) {
+			kfree(rstc);
 			return;
+		}
 	}
 
 	meson8b_cpu_nb_data.cpu_clk = clk_hw_onecell_data->hws[CLKID_CPUCLK];
@@ -3727,13 +3730,16 @@ static void __init meson8b_clkc_init_common(struct device_node *np,
 	if (ret) {
 		pr_err("%s: failed to register the CPU clock notifier\n",
 		       __func__);
+		kfree(rstc);
 		return;
 	}
 
 	ret = of_clk_add_hw_provider(np, of_clk_hw_onecell_get,
 				     clk_hw_onecell_data);
-	if (ret)
+	if (ret) {
 		pr_err("%s: failed to register clock provider\n", __func__);
+		kfree(rstc);
+	}
 }
 
 static void __init meson8_clkc_init(struct device_node *np)
-- 
2.26.2