rgw: break out of read loop if we got zero bytes

If the part that we're reading is corrupted and we end up
reading zero bytes, we need to exit, otherwise we'd just
loop forever.

Signed-off-by: Yehuda Sadeh <yehuda@inktank.com>

diff --git a/src/rgw/rgw_op.cc b/src/rgw/rgw_op.cc
index bf4de3f2ea842fd901572064066ef400b66efe19..f227aa3208c05234e5a24b26ecdaa220feba0b18 100644 (file)
--- a/src/rgw/rgw_op.cc
+++ b/src/rgw/rgw_op.cc
@@ -578,6 +578,13 @@ void RGWGetObj::execute()
       goto done;
     }
     len = ret;
+
+    if (!len) {
+      dout(0) << "WARNING: failed to read object, returned zero length" << dendl;
+      ret = -EIO;
+      goto done;
+    }
+
     ofs += len;
     ret = 0;