From: Jiri Olsa <jo...@kernel.org>

Sukadev reported segfault on releasing perf env's numa data.  It's due
to nr_numa_nodes being set no matter if the numa data gets parsed
properly. The perf_env__exit crash the on releasing non existed data.

Setting nr_numa_nodes only when data are parsed out properly.

Signed-off-by: Jiri Olsa <jo...@kernel.org>
Reported-by: Sukadev Bhattiprolu <suka...@linux.vnet.ibm.com>
Cc: Adrian Hunter <adrian.hun...@intel.com>
Cc: David Ahern <dsah...@gmail.com>
Cc: Namhyung Kim <namhy...@kernel.org>
Cc: Wang Nan <wangn...@huawei.com>
Link: http://lkml.kernel.org/n/tip-dt9c0zgkt4hybn2cr4xia...@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <a...@redhat.com>
---
 tools/perf/util/header.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/perf/util/header.c b/tools/perf/util/header.c
index 85dd0db0a127..2f3eded54b0c 100644
--- a/tools/perf/util/header.c
+++ b/tools/perf/util/header.c
@@ -1895,7 +1895,6 @@ static int process_numa_topology(struct perf_file_section 
*section __maybe_unuse
        if (ph->needs_swap)
                nr = bswap_32(nr);
 
-       ph->env.nr_numa_nodes = nr;
        nodes = zalloc(sizeof(*nodes) * nr);
        if (!nodes)
                return -ENOMEM;
@@ -1932,6 +1931,7 @@ static int process_numa_topology(struct perf_file_section 
*section __maybe_unuse
 
                free(str);
        }
+       ph->env.nr_numa_nodes = nr;
        ph->env.numa_nodes = nodes;
        return 0;
 
-- 
2.7.4

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