From: Frederic Suter <frederic.suter@cc.in2p3.fr>
Date: Fri, 25 Sep 2015 14:05:48 +0000 (+0200)
Subject: be sure that we don't try to read bytes after the end of the file
X-Git-Tag: v3_12~117^2~4
X-Git-Url: http://info.iut-bm.univ-fcomte.fr/pub/gitweb/simgrid.git/commitdiff_plain/db47f7bec9a8c821125bda2d6cb27626e12e7fa7?ds=sidebyside

be sure that we don't try to read bytes after the end of the file
---

diff --git a/src/surf/storage_n11.cpp b/src/surf/storage_n11.cpp
index 8fc1edec8b..42fef37138 100644
--- a/src/surf/storage_n11.cpp
+++ b/src/surf/storage_n11.cpp
@@ -433,7 +433,11 @@ StorageAction *StorageN11::close(surf_file_t fd)
 StorageAction *StorageN11::read(surf_file_t fd, sg_size_t size)
 {
   if(fd->current_position + size > fd->size){
-    size = fd->size - fd->current_position;
+    if (fd->current_position > fd->size){
+      size = 0;
+    } else {
+      size = fd->size - fd->current_position;
+    }
     fd->current_position = fd->size;
   }
   else