shithub: choc

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ref: 5e064562c09ceb5b93a4ddafe734cdb6c7b081c6
parent: 6357ef2d6e960cd3cbed76405711e058df679dbf
author: Fabian Greffrath <fabian+debian@greffrath.com>
date: Tue Oct 28 02:27:33 EDT 2014

setup: dynamically set size of iwad_labels array

With the addition of the Freedoom IWADs, the number of IWADs supported
by chocolate-doom has been raised to 10. However, the iwad_labels[]
array only holds place for up to 8 pointers. Incidently, I have all 10
IWADs installed and trying to warp into a game from
chocolate-doom-setup leads to an out-of-bounds access of this array
and so the application crashes with a segmentation fault.

Instead of increasing the array size to 10, which will bite us next
time, I decided to set its size dynamically as soon as the number of
IWADs of known.

--- a/src/setup/multiplayer.c

+++ b/src/setup/multiplayer.c

@@ -55,7 +55,7 @@

 // Array of IWADs found to be installed

 static const iwad_t **found_iwads;

-static char *iwad_labels[8];

+static char **iwad_labels;

 // Index of the currently selected IWAD

@@ -559,8 +559,14 @@

     for (i=0; found_iwads[i] != NULL; ++i)

     {

-        iwad_labels[i] = found_iwads[i]->description;

          ++num_iwads;

+    }

+

+    iwad_labels = malloc(sizeof(*iwad_labels) * num_iwads);

+

+    for (i=0; i < num_iwads; ++i)

+    {

+        iwad_labels[i] = found_iwads[i]->description;

     }

     // If no IWADs are found, provide Doom 2 as an option, but