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clocksource/drivers/bcm2835_timer: Fix memory leak of timer

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[ 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: 524a7f0898 ("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>
This commit is contained in:
Colin Ian King 2019-12-19 21:32:46 +00:00 • committed by Greg Kroah-Hartman
parent 39a80bbf57
commit be1777babb
1 changed files with 4 additions and 1 deletions
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5
drivers/clocksource/bcm2835_timer.c
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@ -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;