From: Colin Ian King colin.king@canonical.com
[ Upstream commit 2052d032c06761330bca4944bb7858b00960e868 ]
Currently when setup_irq fails the error exit path will leak the recently allocated timer structure. Originally the code would throw a panic but a later commit changed the behaviour to return via the err_iounmap path and hence we now have a memory leak. Fix this by adding a err_timer_free error path that kfree's timer.
Addresses-Coverity: ("Resource Leak") Fixes: 524a7f08983d ("clocksource/drivers/bcm2835_timer: Convert init function to return error") Signed-off-by: Colin Ian King colin.king@canonical.com Signed-off-by: Daniel Lezcano daniel.lezcano@linaro.org Link: https://lore.kernel.org/r/20191219213246.34437-1-colin.king@canonical.com Signed-off-by: Sasha Levin sashal@kernel.org Signed-off-by: Yang Yingliang yangyingliang@huawei.com --- drivers/clocksource/bcm2835_timer.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/clocksource/bcm2835_timer.c b/drivers/clocksource/bcm2835_timer.c index 60da253..1082dce 100644 --- a/drivers/clocksource/bcm2835_timer.c +++ b/drivers/clocksource/bcm2835_timer.c @@ -134,7 +134,7 @@ static int __init bcm2835_timer_init(struct device_node *node) ret = setup_irq(irq, &timer->act); if (ret) { pr_err("Can't set up timer IRQ\n"); - goto err_iounmap; + goto err_timer_free; }
clockevents_config_and_register(&timer->evt, freq, 0xf, 0xffffffff); @@ -143,6 +143,9 @@ static int __init bcm2835_timer_init(struct device_node *node)
return 0;
+err_timer_free: + kfree(timer); + err_iounmap: iounmap(base); return ret;