From: Youling Tang <tangyouling@loongson.cn>
To: Alessandro Zummo <a.zummo@towertech.it>,
Alexandre Belloni <alexandre.belloni@bootlin.com>,
Maxime Ripard <mripard@kernel.org>, Chen-Yu Tsai <wens@csie.org>
Cc: linux-rtc@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: [PATCH] rtc: Fix memleak in sun6i_rtc_clk_init
Date: Sat, 14 Nov 2020 12:18:21 +0800 [thread overview]
Message-ID: <1605327501-15110-1-git-send-email-tangyouling@loongson.cn> (raw)
When rtc->base or rtc->int_osc or rtc->losc or rtc->ext_losc is NULL,
we should free clk_data and rtc before the function returns to prevent
memleak.
Signed-off-by: Youling Tang <tangyouling@loongson.cn>
---
drivers/rtc/rtc-sun6i.c | 7 ++++---
1 file changed, 4 insertions(+), 3 deletions(-)
diff --git a/drivers/rtc/rtc-sun6i.c b/drivers/rtc/rtc-sun6i.c
index e2b8b15..84ff1e6 100644
--- a/drivers/rtc/rtc-sun6i.c
+++ b/drivers/rtc/rtc-sun6i.c
@@ -272,7 +272,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
300000000);
if (IS_ERR(rtc->int_osc)) {
pr_crit("Couldn't register the internal oscillator\n");
- return;
+ goto err;
}
parents[0] = clk_hw_get_name(rtc->int_osc);
@@ -290,7 +290,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
rtc->losc = clk_register(NULL, &rtc->hw);
if (IS_ERR(rtc->losc)) {
pr_crit("Couldn't register the LOSC clock\n");
- return;
+ goto err;
}
of_property_read_string_index(node, "clock-output-names", 1,
@@ -301,7 +301,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
&rtc->lock);
if (IS_ERR(rtc->ext_losc)) {
pr_crit("Couldn't register the LOSC external gate\n");
- return;
+ goto err;
}
clk_data->num = 2;
@@ -316,6 +316,7 @@ static void __init sun6i_rtc_clk_init(struct device_node *node,
err:
kfree(clk_data);
+ kfree(rtc);
}
static const struct sun6i_rtc_clk_data sun6i_a31_rtc_data = {
--
2.1.0
next reply other threads:[~2020-11-14 4:18 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-14 4:18 Youling Tang [this message]
2020-11-14 22:16 ` [PATCH] rtc: Fix memleak in sun6i_rtc_clk_init Alexandre Belloni
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