rgw: off-by-one in rgw_trim_whitespace()

Fixes: #7543
Backport: dumpling

Reviewed-by: Yehuda Sadeh <yehuda@inktank.com>
Signed-off-by: Ray Lv <raylv@yahoo-inc.com>
(cherry picked from commit 195d53a7fc695ed954c85022fef6d2a18f68fe20)

diff --git a/src/rgw/rgw_common.cc b/src/rgw/rgw_common.cc
index 3fb0f7471d7e9818f0f1aa0bb570b64b8c21e7a3..66553a28c5bb70c4aa87f43eb01416c600dd698d 100644 (file)
--- a/src/rgw/rgw_common.cc
+++ b/src/rgw/rgw_common.cc
@@ -779,7 +779,7 @@ string rgw_trim_whitespace(const string& src)
   }
 
   int end = src.size() - 1;
-  if (end <= start) {
+  if (end < start) {
     return string();
   }