linux-kernel - [PATCH V2] clocksource/drivers/cadence_ttc: fix memory leak in ttc_setup

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Date:   Wed, 11 Nov 2020 09:16:52 +0800
From:   Yu Kuai <yukuai3@...wei.com>
To:     <michal.simek@...inx.com>, <daniel.lezcano@...aro.org>,
        <tglx@...utronix.de>, <soren.brinkmann@...inx.com>
CC:     <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, <yukuai3@...wei.com>,
        <yi.zhang@...wei.com>, <zhangxiaoxu5@...wei.com>
Subject: [PATCH V2] clocksource/drivers/cadence_ttc: fix memory leak in ttc_setup_clockevent()

If clk_notifier_register() failed, ttc_setup_clockevent() will return
without freeing 'ttcce', which will leak memory.

Fixes: 70504f311d4b ("clocksource/drivers/cadence_ttc: Convert init function to return error")
Reported-by: Hulk Robot <hulkci@...wei.com>
Signed-off-by: Yu Kuai <yukuai3@...wei.com>
Reviewed-by: Michal Simek <michal.simek@...inx.com>
---
 drivers/clocksource/timer-cadence-ttc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/clocksource/timer-cadence-ttc.c b/drivers/clocksource/timer-cadence-ttc.c
index 80e960602030..32b9560ce408 100644
--- a/drivers/clocksource/timer-cadence-ttc.c
+++ b/drivers/clocksource/timer-cadence-ttc.c
@@ -426,6 +426,7 @@ static int __init ttc_setup_clockevent(struct clk *clk,
 				    &ttcce->ttc.clk_rate_change_nb);
 	if (err) {
 		pr_warn("Unable to register clock notifier.\n");
+		kfree(ttcce);
 		return err;
 	}
 
-- 
2.25.4