We should check if 'dso' is a null pointer before passing it to the
function dso__type(), otherwise a segfault will be raised in
dso__data_get_fd(). In function machine__find_vdso(), the return value
checking of 'dso' is missed and this patch fixes this issue.
Signed-off-by: He Kuang <heku...@huawei.com>
---
tools/perf/util/vdso.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/tools/perf/util/vdso.c b/tools/perf/util/vdso.c
index 8f81c41..7bdcad4 100644
--- a/tools/perf/util/vdso.c
+++ b/tools/perf/util/vdso.c
@@ -296,7 +296,7 @@ static struct dso *machine__find_vdso(struct machine
*machine,
if (!dso) {
dso = __dsos__find(&machine->dsos, DSO__NAME_VDSO,
true);
- if (dso_type != dso__type(dso, machine))
+ if (dso && dso_type != dso__type(dso, machine))
dso = NULL;
}
break;
--
1.8.5.2
