rgw: segment fault when shard id out of range

Fixes: http://tracker.ceph.com/issues/19732
Signed-off-by: redickwang <redickwang@tencent.com>
(cherry picked from commit ff4c40fc2e3c092d17a218ae6132de4e6034c8ee)

diff --git a/src/rgw/rgw_bucket.cc b/src/rgw/rgw_bucket.cc
index 88695ad74953ba0e6cc2161b33843312bec5e2d6..1e8b2e0609cae26a65c14cd65ec11a0fb725062a 100644 (file)
--- a/src/rgw/rgw_bucket.cc
+++ b/src/rgw/rgw_bucket.cc
@@ -1867,6 +1867,8 @@ int RGWDataChangesLog::list_entries(int shard, const real_time& start_time, cons
                                    const string& marker,
                                    string *out_marker,
                                    bool *truncated) {
+  if (shard >= num_shards)
+    return -EINVAL;
 
   list<cls_log_entry> log_entries;