On Thu, Jun 09, 2011 at 02:44:19PM +0800, Sam Liao wrote:
> --- a/tools/perf/util/session.c
> +++ b/tools/perf/util/session.c
> @@ -247,9 +247,14 @@ int perf_session__resolve_callchain(struct
> perf_session *self,
> callchain_cursor_reset(&self->callchain_cursor);
>
> for (i = 0; i < chain->nr; i++) {
> - u64 ip = chain->ips[i];
> + u64 ip;
> struct addr_location al;
>
> + if (callchain_param.order == ORDER_CALLEE)
> + ip = chain->ips[i];
> + else
> + ip = chain->ips[chain->nr - i - 1];
This can dereference a bad pointer if chain->nr == 0.
-Arun
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