Each file in this commit has the issue where it is possible for code to

overrun static buffers. This could lead to serious problems. Granted it
is almost impossible to do that. But it isn't totally impossible. So this
commit makes it impossible to overrun.

4 files changed, 49 insertions, 36 deletions

diff --git a/noncore/games/backgammon/moveengine.cpp b/noncore/games/backgammon/moveengine.cpp
index a4145cc..b102258 100644
--- a/noncore/games/backgammon/moveengine.cpp
+++ b/noncore/games/backgammon/moveengine.cpp
@@ -53,7 +53,8 @@ void MoveEngine::position(Pieces& pieces,bool non_qte)
         {
             if(population[a].total>0) //player 1 pieces
             {
-                pieces.player1[player1_counter].x=x_coord[a]-offset;
+		if (a < 26)
+                    pieces.player1[player1_counter].x=x_coord[a]-offset;
                 if(a>=0 && a<13)
                 {
                     pieces.player1[player1_counter].y=yup_coord[b]-offset;
@@ -96,7 +97,8 @@ void MoveEngine::position(Pieces& pieces,bool non_qte)
 
             else if(population[a].total<0) //player 2 pieces
             {
-                pieces.player2[player2_counter].x=x_coord[a]-offset;
+		if (a < 26)
+                    pieces.player2[player2_counter].x=x_coord[a]-offset;
                 if(a>=0 && a<13)
                 {
                     pieces.player2[player2_counter].y=yup_coord[b]-offset;
diff --git a/noncore/games/kbill/UI.cpp b/noncore/games/kbill/UI.cpp
index 611cebf..a49c3c1 100644
--- a/noncore/games/kbill/UI.cpp
+++ b/noncore/games/kbill/UI.cpp
@@ -68,28 +68,27 @@ void UI::popup_dialog (int dialog) {
 	kill_timer();
 	switch (dialog) {
 	case Game::ENDGAME:
-			QMessageBox::message(("Endgame"), QT_TR_NOOP(endgamestr));
-			break;
+		QMessageBox::message(("Endgame"), QT_TR_NOOP(endgamestr));
+		break;
 	case Game::HIGHSCORE:
-		//	QMessageBox::message(("HighScore"), highscorestr);
-			break;
-	case Game::ENTERNAME: {
+		break;
+	case Game::ENTERNAME:
+		{
 			InputBox b(main, 0, ("Enter Name"), QT_TR_NOOP(enternamestr));
 			bool state = b.exec() == 2;
-		  char str[20], *nl;
-	    strcpy(str, b.getText());
-	    if (!str[0] || state)
+			char str[20], *nl;
+			strncpy(str, b.getText(), 19);
+	    		if (!str[0] || state)
 				strcpy(str, "Anonymous");
-	    else if ((nl = strchr(str, '\n')))
+			else if ((nl = strchr(str, '\n')))
 				*nl = '\0';
-	    if (strlen(str) > 20)
-				str[20] = 0;  /* truncate string if too long */
-//	    scores.recalc(str);
-			}
-	    break;
+			if (strlen(str) > 19)
+				str[19] = '\0';  /* truncate/terminate the string if it is too long */
+		}
+		break;
 	case Game::SCORE:
-			QMessageBox::message(("Score"), scorestr);
-			break;
+		QMessageBox::message(("Score"), scorestr);
+		break;
 	}
 	restart_timer();
 }
diff --git a/noncore/games/kcheckers/echeckers.cpp b/noncore/games/kcheckers/echeckers.cpp
index 1146059..afe62eb 100644
--- a/noncore/games/kcheckers/echeckers.cpp
+++ b/noncore/games/kcheckers/echeckers.cpp
@@ -79,9 +79,9 @@ bool ECheckers::checkCapture1()
         if(board[i-5]==MAN2 || board[i-5]==KING2)
           if(board[i-10]==FREE) return true;
         if(board[i+5]==MAN2 || board[i+5]==KING2)
-          if(board[i+10]==FREE) return true;
+          if(board[((i+10) < 54) ? i+10 : 53]==FREE) return true;
         if(board[i+6]==MAN2 || board[i+6]==KING2)
-          if(board[i+12]==FREE) return true;
+          if(board[((i+12) < 54) ? i+12 : 53]==FREE) return true;
     }
   }
   return false;
@@ -221,9 +221,9 @@ bool ECheckers::checkCapture2()
     {
       case MAN2:
         if(board[i+5]==MAN1 || board[i+5]==KING1)
-          if(board[i+10]==FREE) return true;
+          if(board[((i+10) < 54) ? i+10 : 53]==FREE) return true;
         if(board[i+6]==MAN1 || board[i+6]==KING1)
-          if(board[i+12]==FREE) return true;
+          if(board[((i+12) < 54) ? i+12 : 53]==FREE) return true;
         break;
       case KING2:
         if(board[i-6]==MAN1 || board[i-6]==KING1)
@@ -231,9 +231,9 @@ bool ECheckers::checkCapture2()
         if(board[i-5]==MAN1 || board[i-5]==KING1)
           if(board[i-10]==FREE) return true;
         if(board[i+5]==MAN1 || board[i+5]==KING1)
-          if(board[i+10]==FREE) return true;
+          if(board[((i+10) < 54) ? i+10 : 53]==FREE) return true;
         if(board[i+6]==MAN1 || board[i+6]==KING1)
-          if(board[i+12]==FREE) return true;
+          if(board[((i+12) < 54) ? i+12 : 53]==FREE) return true;
     }
   }
   return false;
diff --git a/noncore/games/kcheckers/rcheckers.cpp b/noncore/games/kcheckers/rcheckers.cpp
index a1c7afa..d808780 100644
--- a/noncore/games/kcheckers/rcheckers.cpp
+++ b/noncore/games/kcheckers/rcheckers.cpp
@@ -112,9 +112,9 @@ bool RCheckers::checkCapture1()
         if(board[i-5]==MAN2 || board[i-5]==KING2)
           if(board[i-10]==FREE) return true;
         if(board[i+5]==MAN2 || board[i+5]==KING2)
-          if(board[i+10]==FREE) return true;
+          if(board[((i+10) < 54) ? i+10 : 53]==FREE) return true;
         if(board[i+6]==MAN2 || board[i+6]==KING2)
-          if(board[i+12]==FREE) return true;
+          if(board[((i+12) < 54) ? i+12 : 53]==FREE) return true;
         break;
       case KING1:
         int k;
@@ -126,13 +126,19 @@ bool RCheckers::checkCapture1()
         if(board[k]==MAN2 || board[k]==KING2)
           if(board[k-5]==FREE) return true;
 
-        for(k=i+5;board[k]==FREE;k+=5);
+        for(k=i+5;board[k]==FREE;k+=5) {
+          if (k >= 49)
+            break;
+        }
         if(board[k]==MAN2 || board[k]==KING2)
-          if(board[k+5]==FREE) return true;
+          if(board[((k+5) < 54) ? k+5 : 53]==FREE) return true;
 
-        for(k=i+6;board[k]==FREE;k+=6);
+        for(k=i+6;board[k]==FREE;k+=6) {
+          if (k >=48)
+            break;
+        }
         if(board[k]==MAN2 || board[k]==KING2)
-          if(board[k+6]==FREE) return true;
+          if(board[((k+6) < 54) ? k+6 : 53]==FREE) return true;
     }
   }
   return false;
@@ -286,9 +292,9 @@ bool RCheckers::checkCapture2()
         if(board[i-5]==MAN1 || board[i-5]==KING1)
           if(board[i-10]==FREE) return true;
         if(board[i+5]==MAN1 || board[i+5]==KING1)
-          if(board[i+10]==FREE) return true;
+          if(board[((i+10) < 54) ? i+10 : 53]==FREE) return true;
         if(board[i+6]==MAN1 || board[i+6]==KING1)
-          if(board[i+12]==FREE) return true;
+          if(board[((i+12) < 54) ? i+12 : 53]==FREE) return true;
         break;
       case KING2:
         int k;
@@ -300,13 +306,19 @@ bool RCheckers::checkCapture2()
         if(board[k]==MAN1 || board[k]==KING1)
           if(board[k-5]==FREE) return true;
 
-        for(k=i+5;board[k]==FREE;k+=5);
+        for(k=i+5;board[k]==FREE;k+=5) {
+          if (k>=49)
+            break;
+        }
         if(board[k]==MAN1 || board[k]==KING1)
-          if(board[k+5]==FREE) return true;
+          if(board[((k+5) < 54) ? k+5 : 53]==FREE) return true;
 
-        for(k=i+6;board[k]==FREE;k+=6);
+        for(k=i+6;board[k]==FREE;k+=6) {
+          if (k>=48)
+            break;
+        }
         if(board[k]==MAN1 || board[k]==KING1)
-          if(board[k+6]==FREE) return true;
+          if(board[((k+6) < 54) ? k+6 : 53]==FREE) return true;
     }
   }
   return false;