do check of max_size in get_size_limits() to avoid overflow

1 files changed, 12 insertions, 2 deletions

diff --git a/src/core/constraints.c b/src/core/constraints.c
index 5606b76b..c28fc0d4 100644
--- a/src/core/constraints.c
+++ b/src/core/constraints.c
@@ -710,8 +710,18 @@ get_size_limits (const MetaWindow        *window,
 
       min_size->width  += fw;
       min_size->height += fh;
-      max_size->width  += fw;
-      max_size->height += fh;
+      /* Do check to avoid overflow (e.g. max_size->width & max_size->height
+       * may be set to G_MAXINT by meta_set_normal_hints()).
+       */
+      if (max_size->width < (G_MAXINT - fw))
+        max_size->width += fw;
+      else
+        max_size->width = G_MAXINT;
+
+      if (max_size->height < (G_MAXINT - fh))
+        max_size->height += fh;
+      else
+        max_size->height = G_MAXINT;
     }
 }