[greatlrd] 25718: fixed a problem possible overwrite memory in cmd. base on knowlges from bug 2017. the patch are incorrect to fix it. we simple do not allown overwrite the memory. See issue #2017 for more details.

Author: greatlrd
Date: Sun Feb  4 21:17:34 2007
New Revision: 25718

URL: http://svn.reactos.org/svn/reactos?rev=25718&view=rev
Log:
fixed a problem possible overwrite memory in cmd. base on knowlges from bug 2017. the
patch are incorrect to fix it. 
we simple do not allown overwrite the memory.
  
See issue #2017 for more details.

Modified:
    branches/ros-branch-0_3_1/reactos/base/shell/cmd/cmd.c

Modified: branches/ros-branch-0_3_1/reactos/base/shell/cmd/cmd.c
URL:
http://svn.reactos.org/svn/reactos/branches/ros-branch-0_3_1/reactos/base/s…
==============================================================================
--- branches/ros-branch-0_3_1/reactos/base/shell/cmd/cmd.c (original)
+++ branches/ros-branch-0_3_1/reactos/base/shell/cmd/cmd.c Sun Feb  4 21:17:34 2007
@@ -187,6 +187,9 @@
 	INT c = 0;
 	INT n = 0;
 
+	if (len <= 1)
+		return 0;
+
 	if (num.QuadPart == 0)
 	{
 		des[0] = _T('0');
@@ -203,6 +206,8 @@
                         temp[30 - c++] = (TCHAR)(num.QuadPart % 10) + _T('0');
 			num.QuadPart /= 10;
 		}
+        if (c>len)
+			c=len;
 
 		for (n = 0; n <= c; n++)
 			des[n] = temp[31 - c + n];