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[PATCH] perf test: Fix hist testcases when kptr_restrict is on

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Currently if kptr_restrict is enabled, all hist tests failed with
segfaults.  This is because machine__create_kernel_maps() in
setup_fake_machine() failed in that situation, and it called
machine__delete() on the error path.  But outer callers again called
machines__exit() causing double free for the host machine.

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
---
 tools/perf/tests/hists_common.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/tools/perf/tests/hists_common.c b/tools/perf/tests/hists_common.c
index 46f453b1de60..bcfd081ee1d2 100644
--- a/tools/perf/tests/hists_common.c
+++ b/tools/perf/tests/hists_common.c
@@ -88,8 +88,8 @@ struct machine *setup_fake_machine(struct machines *machines)
 	}
 
 	if (machine__create_kernel_maps(machine)) {
-		pr_debug("Not enough memory for machine setup\n");
-		goto out;
+		pr_debug("Cannot create kernel maps\n");
+		return NULL;
 	}
 
 	for (i = 0; i < ARRAY_SIZE(fake_threads); i++) {
@@ -155,7 +155,6 @@ struct machine *setup_fake_machine(struct machines *machines)
 out:
 	pr_debug("Not enough memory for machine setup\n");
 	machine__delete_threads(machine);
-	machine__delete(machine);
 	return NULL;
 }
 
-- 
2.6.4

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[PATCH] perf test: Fix hist testcases when kptr_restrict is on Namhyung Kim <namhyung@kernel.org> - 2015-12-14 04:20 +0100
  Re: [PATCH] perf test: Fix hist testcases when kptr_restrict is on Jiri Olsa <jolsa@redhat.com> - 2015-12-14 10:50 +0100
    Re: [PATCH] perf test: Fix hist testcases when kptr_restrict is on Arnaldo Carvalho de Melo <acme@kernel.org> - 2015-12-14 16:20 +0100
  [tip:perf/core] perf test:   Fix hist testcases when kptr_restrict is on tip-bot for Namhyung Kim <tipbot@zytor.com> - 2015-12-18 09:50 +0100

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