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>

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index bb5b23d..60ecdd3 100644 (file)
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -751,7 +751,7 @@ int cmd_record(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;

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 5f3ac9f..4abdd9b 100644 (file)
--- 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;