perf record: Zero out mmap_array to fix segfault

Reported-by: Li Zefan <lizf@cn.fujitsu.com>
Tested-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Zhang Yanmin <yanmin_zhang@linux.intel.com>
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <1269557941-15617-6-git-send-email-acme@infradead.org>
Cc: <stable@kernel.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 1 insertions, 1 deletions

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 5f3ac9ff354d..4abdd9b646b3 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1371,7 +1371,7 @@ int cmd_top(int argc, const char **argv, const char *prefix __used)
         for (i = 0; i < MAX_NR_CPUS; i++) {
                 for (j = 0; j < MAX_COUNTERS; j++) {
                         fd[i][j] = malloc(sizeof(int)*thread_num);
-                        mmap_array[i][j] = malloc(
+                        mmap_array[i][j] = zalloc(
                                 sizeof(struct mmap_data)*thread_num);
                         if (!fd[i][j] || !mmap_array[i][j])
                                 return -ENOMEM;