From: Yu Kuai yukuai3@huawei.com
[ Upstream commit eee422c46e6840a81c9db18a497b74387a557b29 ]
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@huawei.com Signed-off-by: Yu Kuai yukuai3@huawei.com Signed-off-by: Daniel Lezcano daniel.lezcano@linaro.org Link: https://lore.kernel.org/r/20201116135123.2164033-1-yukuai3@huawei.com Signed-off-by: Sasha Levin sashal@kernel.org --- 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 80e9606020307..4efd0cf3b602d 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)