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23 October 2021, 00:29:24 UTC
Revision d4a19eb3b15a4ba98f627182f48d5bc0cffae670 authored by Matthias Brugger on 19 February 2015, 10:41:33 UTC, committed by Daniel Lezcano on 25 February 2015, 09:28:49 UTC 
clocksource: mtk: Fix race conditions in probe code
 
We have two race conditions in the probe code which could lead to a null
pointer dereference in the interrupt handler.

The interrupt handler accesses the clockevent device, which may not yet be
registered.

First race condition happens when the interrupt handler gets registered before
the interrupts get disabled. The second race condition happens when the
interrupts get enabled, but the clockevent device is not yet registered.

Fix that by disabling the interrupts before we register the interrupt and enable
the interrupts after the clockevent device got registered.

Reported-by: Gongbae Park <yongbae2@gmail.com>
Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com>
Cc: stable@vger.kernel.org
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
1 parent a8b1b9f
History
Tip revision: d4a19eb3b15a4ba98f627182f48d5bc0cffae670 authored by Matthias Brugger on 19 February 2015, 10:41:33 UTC
clocksource: mtk: Fix race conditions in probe code
Tip revision: d4a19eb
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