rgw: avoid occuring radosgw daemon crash when access a conditionally redirected stati...

Fixes: https://tracker.ceph.com/issues/51715
Signed-off-by: xiangrui meng <mengxr@chinatelecom.cn>
Signed-off-by: yupeng chen <chenyupeng@chinatelecom.cn>
(cherry picked from commit 865d13e9fa043954dce5110f4f8ae693af9604ce)

diff --git a/src/rgw/rgw_website.cc b/src/rgw/rgw_website.cc
index 4369ac752dc2376de146001c4798f1b8fa14227f..ff58786c77d0fe79ed2383ba5752e54a84f13ddb 100644 (file)
--- a/src/rgw/rgw_website.cc
+++ b/src/rgw/rgw_website.cc
@@ -45,7 +45,9 @@ void RGWBWRoutingRule::apply_rule(const string& default_protocol, const string&
 
   if (!redirect_info.replace_key_prefix_with.empty()) {
     *new_url += redirect_info.replace_key_prefix_with;
-    *new_url += key.substr(condition.key_prefix_equals.size());
+    if (key.size() > condition.key_prefix_equals.size()) {
+      *new_url += key.substr(condition.key_prefix_equals.size());
+    }
   } else if (!redirect_info.replace_key_with.empty()) {
     *new_url += redirect_info.replace_key_with;
   } else {