On Wed, 7 Aug 2013, Stephen Boyd wrote:
> ---8<----
>
> diff --git a/arch/arm/kernel/perf_event.c b/arch/arm/kernel/perf_event.c
> index d9f5cd4..21f7790 100644
> --- a/arch/arm/kernel/perf_event.c
> +++ b/arch/arm/kernel/perf_event.c
> @@ -53,7 +53,12 @@ armpmu_map_cache_event(const unsigned (*cache_map)
> static int
> armpmu_map_hw_event(const unsigned (*event_map)[PERF_COUNT_HW_MAX], u64 config)
> {
> - int mapping = (*event_map)[config];
> + int mapping;
> +
> + if (config >= PERF_COUNT_HW_MAX)
> + return -ENOENT;
> +
> + mapping = (*event_map)[config];
> return mapping == HW_OP_UNSUPPORTED ? -ENOENT : mapping;
> }
I've tested this patch and my testcase no longer causes the kernel to
oops, so
Tested-by: Vince Weaver <vincent.weaver@xxxxxxxxx>
Thanks,
Vince
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