Hello, Liu.
On Thu, Nov 07, 2013 at 12:27:56AM +0000, Liu, Chuansheng wrote:
> The driver code is as below:
> _INIT() {
>
> A = devm_kzalloc();
> B= devm_request_threaded_irq(isr_handler);
> C = devm_kzalloc();
> }
>
> When driver _EXIT, the devres_release_all () will be called.
> The C will be kfreed before B, but when freeing irq B, the pending
> isr_handler() possibly
> will access the memory B which has been freed.
> Then the memory corruption occurred.
>
> This patch can solve this scenario.
Isn't the bug there IRQ being requested before all its resources are
allocated? The proposed change just masks the underlying issue or
incorrectly ordered operations.
Thanks.
--
tejun
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majord...@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/
