The following commit has been merged into the timers/core branch of tip:
Commit-ID: eee422c46e6840a81c9db18a497b74387a557b29
Gitweb: https://git.kernel.org/tip/eee422c46e6840a81c9db18a497b74387a557b29
Author: Yu Kuai <yukuai3@xxxxxxxxxx>
AuthorDate: Mon, 16 Nov 2020 21:51:23 +08:00
Committer: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
CommitterDate: Thu, 03 Dec 2020 19:16:26 +01:00
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@xxxxxxxxxx>
Signed-off-by: Yu Kuai <yukuai3@xxxxxxxxxx>
Signed-off-by: Daniel Lezcano <daniel.lezcano@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20201116135123.2164033-1-yukuai3@xxxxxxxxxx
---
drivers/clocksource/timer-cadence-ttc.c | 18 +++++++++---------
1 file changed, 9 insertions(+), 9 deletions(-)
diff --git a/drivers/clocksource/timer-cadence-ttc.c b/drivers/clocksource/timer-cadence-ttc.c
index 80e9606..4efd0cf 100644
--- a/drivers/clocksource/timer-cadence-ttc.c
+++ b/drivers/clocksource/timer-cadence-ttc.c
@@ -413,10 +413,8 @@ static int __init ttc_setup_clockevent(struct clk *clk,
ttcce->ttc.clk = clk;
err = clk_prepare_enable(ttcce->ttc.clk);
- if (err) {
- kfree(ttcce);
- return err;
- }
+ if (err)
+ goto out_kfree;
ttcce->ttc.clk_rate_change_nb.notifier_call =
ttc_rate_change_clockevent_cb;
@@ -426,7 +424,7 @@ 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");
- return err;
+ goto out_kfree;
}
ttcce->ttc.freq = clk_get_rate(ttcce->ttc.clk);
@@ -455,15 +453,17 @@ static int __init ttc_setup_clockevent(struct clk *clk,
err = request_irq(irq, ttc_clock_event_interrupt,
IRQF_TIMER, ttcce->ce.name, ttcce);
- if (err) {
- kfree(ttcce);
- return err;
- }
+ if (err)
+ goto out_kfree;
clockevents_config_and_register(&ttcce->ce,
ttcce->ttc.freq / PRESCALE, 1, 0xfffe);
return 0;
+
+out_kfree:
+ kfree(ttcce);
+ return err;
}
static int __init ttc_timer_probe(struct platform_device *pdev)
|