[client/common] fixes for issues detected through static analysis.

client/src/app.c

@@ -230,6 +230,11 @@ void app_clipboardRequest(const LG_ClipboardReplyFn replyFn, void * opaque)
     return;
 
   struct CBRequest * cbr = malloc(sizeof(*cbr));
+  if (!cbr)
+  {
+    DEBUG_ERROR("out of memory");
+    return;
+  }
 
   cbr->type    = g_state.cbType;
   cbr->replyFn = replyFn;
@@ -666,6 +671,12 @@ KeybindHandle app_registerKeybind(int sc, KeybindFn callback, void * opaque, con
   }
 
   KeybindHandle handle = malloc(sizeof(*handle));
+  if (!handle)
+  {
+    DEBUG_ERROR("out of memory");
+    return NULL;
+  }
+
   handle->sc       = sc;
   handle->callback = callback;
   handle->opaque   = opaque;
@@ -716,6 +727,12 @@ void app_registerOverlay(const struct LG_OverlayOps * ops, const void * params)
   ASSERT_LG_OVERLAY_VALID(ops);
 
   struct Overlay * overlay = malloc(sizeof(*overlay));
+  if (!overlay)
+  {
+    DEBUG_ERROR("out of ram");
+    return;
+  }
+
   overlay->ops           = ops;
   overlay->params        = params;
   overlay->udata         = NULL;
@@ -732,6 +749,7 @@ void app_initOverlays(void)
   ll_lock(g_state.overlays);
   ll_forEachNL(g_state.overlays, item, overlay)
   {
+    DEBUG_ASSERT(overlay->ops);
     if (!overlay->ops->init(&overlay->udata, overlay->params))
     {
       DEBUG_ERROR("Overlay `%s` failed to initialize", overlay->ops->name);

client/src/config.c

@@ -505,22 +505,38 @@ bool config_load(int argc, char * argv[])
 
   // load config from user's home directory
   struct passwd * pw = getpwuid(getuid());
-  char * localFile;
-  alloc_sprintf(&localFile, "%s/.looking-glass-client.ini", pw->pw_dir);
-  if (stat(localFile, &st) >= 0 && S_ISREG(st.st_mode))
+  if (!pw)
+    DEBUG_WARN("getpwuid failed, unable to load user configuration");
+  else
   {
-    DEBUG_INFO("Loading config from: %s", localFile);
-    if (!option_load(localFile))
+    char * localFile;
+    alloc_sprintf(&localFile, "%s/.looking-glass-client.ini", pw->pw_dir);
+    if (!localFile)
     {
-      free(localFile);
+      DEBUG_ERROR("out of memory");
       return false;
     }
+
+    if (stat(localFile, &st) >= 0 && S_ISREG(st.st_mode))
+    {
+      DEBUG_INFO("Loading config from: %s", localFile);
+      if (!option_load(localFile))
+      {
+        free(localFile);
+        return false;
+      }
+    }
+    free(localFile);
   }
-  free(localFile);
 
   // load config from XDG_CONFIG_HOME
   char * xdgFile;
   alloc_sprintf(&xdgFile, "%s/client.ini", lgConfigDir());
+  if (!xdgFile)
+  {
+    DEBUG_ERROR("out of memory");
+    return false;
+  }
 
   if (xdgFile && stat(xdgFile, &st) >= 0 && S_ISREG(st.st_mode))
   {
@@ -714,6 +730,8 @@ static bool optRendererParse(struct Option * opt, const char * str)
 static StringList optRendererValues(struct Option * opt)
 {
   StringList sl = stringlist_new(false);
+  if (!sl)
+    return NULL;
 
   // this typecast is safe as the stringlist doesn't own the values
   for(unsigned int i = 0; i < LG_RENDERER_COUNT; ++i)
@@ -756,6 +774,9 @@ static bool optPosParse(struct Option * opt, const char * str)
 static StringList optPosValues(struct Option * opt)
 {
   StringList sl = stringlist_new(false);
+  if (!sl)
+    return NULL;
+
   stringlist_push(sl, "center");
   stringlist_push(sl, "<left>x<top>, e.g. 100x100");
   return sl;
@@ -768,6 +789,11 @@ static char * optPosToString(struct Option * opt)
 
   int len = snprintf(NULL, 0, "%dx%d", g_params.x, g_params.y);
   char * str = malloc(len + 1);
+  if (!str)
+  {
+    DEBUG_ERROR("out of memory");
+    return NULL;
+  }
   sprintf(str, "%dx%d", g_params.x, g_params.y);
 
   return str;
@@ -791,6 +817,9 @@ static bool optSizeParse(struct Option * opt, const char * str)
 static StringList optSizeValues(struct Option * opt)
 {
   StringList sl = stringlist_new(false);
+  if (!sl)
+    return NULL;
+
   stringlist_push(sl, "<left>x<top>, e.g. 100x100");
   return sl;
 }
@@ -799,6 +828,11 @@ static char * optSizeToString(struct Option * opt)
 {
   int len = snprintf(NULL, 0, "%ux%u", g_params.w, g_params.h);
   char * str = malloc(len + 1);
+  if (!str)
+  {
+    DEBUG_ERROR("out of memory");
+    return NULL;
+  }
   sprintf(str, "%ux%u", g_params.w, g_params.h);
 
   return str;

client/src/main.c

@@ -641,6 +641,11 @@ int main_frameThread(void * unused)
         case FRAME_ROT_90 : lgrFormat.rotate = LG_ROTATE_90 ; break;
         case FRAME_ROT_180: lgrFormat.rotate = LG_ROTATE_180; break;
         case FRAME_ROT_270: lgrFormat.rotate = LG_ROTATE_270; break;
+
+        default:
+          DEBUG_ERROR("Unsupported/invalid frame rotation");
+          lgrFormat.rotate = LG_ROTATE_0;
+          break;
       }
       g_state.rotate = lgrFormat.rotate;
 
@@ -1113,7 +1118,7 @@ static int lg_run(void)
   }
 
   // select and init a renderer
-  bool needsOpenGL;
+  bool needsOpenGL = false;
   LG_RendererParams lgrParams;
   lgrParams.quickSplash = g_params.quickSplash;
 

client/src/overlay/graphs.c

@@ -216,6 +216,12 @@ GraphHandle overlayGraph_register(const char * name, RingBuffer buffer,
     float min, float max, GraphFormatFn formatFn)
 {
   struct OverlayGraph * graph = malloc(sizeof(*graph));
+  if (!graph)
+  {
+    DEBUG_ERROR("out of memory");
+    return NULL;
+  }
+
   graph->name     = name;
   graph->buffer   = buffer;
   graph->enabled  = true;

client/src/overlay/msg.c

@@ -152,6 +152,12 @@ MsgBoxHandle overlayMsg_show(
     const char * caption, const char * fmt, va_list args)
 {
   struct Msg * msg = malloc(sizeof(*msg));
+  if (!msg)
+  {
+    DEBUG_ERROR("out of memory");
+    return NULL;
+  }
+
   msg->caption = strdup(caption);
   msg->lines   = stringlist_new(false);
   valloc_sprintf(&msg->message, fmt, args);