From 397dc6f7ca3c858dc95800f299357311ccf679e6 Mon Sep 17 00:00:00 2001
From: Dinh Nguyen <dinguyen@kernel.org>
Date: Mon, 22 Mar 2021 07:18:44 -0500
Subject: clocksource/drivers/dw_apb_timer_of: Add handling for potential
memory leak
Add calls to disable the clock and unmap the timer base address in case
of any failures.
Reported-by: kernel test robot <lkp@intel.com>
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
Link: https://lore.kernel.org/r/20210322121844.2271041-1-dinguyen@kernel.org
---
drivers/clocksource/dw_apb_timer_of.c | 26 +++++++++++++++++++++-----
1 file changed, 21 insertions(+), 5 deletions(-)
(limited to 'drivers/clocksource/dw_apb_timer_of.c')
diff --git a/drivers/clocksource/dw_apb_timer_of.c b/drivers/clocksource/dw_apb_timer_of.c
index 2b2c3b586987..3819ef5b7098 100644
--- a/drivers/clocksource/dw_apb_timer_of.c
+++ b/drivers/clocksource/dw_apb_timer_of.c
@@ -52,18 +52,34 @@ static int __init timer_get_base_and_rate(struct device_node *np,
return 0;
timer_clk = of_clk_get_by_name(np, "timer");
- if (IS_ERR(timer_clk))
- return PTR_ERR(timer_clk);
+ if (IS_ERR(timer_clk)) {
+ ret = PTR_ERR(timer_clk);
+ goto out_pclk_disable;
+ }
ret = clk_prepare_enable(timer_clk);
if (ret)
- return ret;
+ goto out_timer_clk_put;
*rate = clk_get_rate(timer_clk);
- if (!(*rate))
- return -EINVAL;
+ if (!(*rate)) {
+ ret = -EINVAL;
+ goto out_timer_clk_disable;
+ }
return 0;
+
+out_timer_clk_disable:
+ clk_disable_unprepare(timer_clk);
+out_timer_clk_put:
+ clk_put(timer_clk);
+out_pclk_disable:
+ if (!IS_ERR(pclk)) {
+ clk_disable_unprepare(pclk);
+ clk_put(pclk);
+ }
+ iounmap(*base);
+ return ret;
}
static int __init add_clockevent(struct device_node *event_timer)
--
cgit