[tip:perf/core] perf callchain: Allow for max_stack greater than PERF_MAX_STACK_DEPTH

[tip-bot for Adrian Hunter]

Commit-ID:  0edd453368c6b9cdb756bde2b6675bb0d5d0eb0a
Gitweb:     http://git.kernel.org/tip/0edd453368c6b9cdb756bde2b6675bb0d5d0eb0a
Author:     Adrian Hunter <adrian.hunter@xxxxxxxxx>
AuthorDate: Fri, 25 Sep 2015 16:15:48 +0300
Committer:  Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
CommitDate: Thu, 1 Oct 2015 09:56:06 -0300

perf callchain: Allow for max_stack greater than PERF_MAX_STACK_DEPTH

Adjust the validation to allow for max_stack greater than
PERF_MAX_STACK_DEPTH.

Signed-off-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Link: http://lkml.kernel.org/r/1443186956-18718-18-git-send-email-adrian.hunter@xxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
---
 tools/perf/util/machine.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/machine.c b/tools/perf/util/machine.c
index 76fe167..5ef90be 100644
--- a/tools/perf/util/machine.c
+++ b/tools/perf/util/machine.c
@@ -1831,7 +1831,7 @@ static int thread__resolve_callchain_sample(struct thread *thread,
 	}
 
 check_calls:
-	if (chain->nr > PERF_MAX_STACK_DEPTH) {
+	if (chain->nr > PERF_MAX_STACK_DEPTH && (int)chain->nr > max_stack) {
 		pr_warning("corrupted callchain. skipping...\n");
 		return 0;
 	}
--
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