Fixed bug 4968 - NULL passed to memcpy in WriteProprietary in SDL_hidapi_switch.c

meyraud705

In SDL_hidapi_switch.c

line 443: Function BTrySetupUSB call WriteProprietary with pBuf=NULL and ucLen=0
line 376: WriteProprietary check its input (!pBuf && ucLen > 0) || ucLen > sizeof(packet.rgucProprietaryData): ucLen is 0 so it passes
line 382: WriteProprietary call memcpy with pBuf=NULL

src/joystick/hidapi/SDL_hidapi_switch.c

@@ -391,7 +391,9 @@ static SDL_bool WriteProprietary(SDL_DriverSwitch_Context *ctx, ESwitchProprieta
 
         packet.ucPacketType = k_eSwitchOutputReportIDs_Proprietary;
         packet.ucProprietaryID = ucCommand;
-        SDL_memcpy(packet.rgucProprietaryData, pBuf, ucLen);
+        if (pBuf) {
+            SDL_memcpy(packet.rgucProprietaryData, pBuf, ucLen);
+        }
 
         if (!WritePacket(ctx, &packet, sizeof(packet))) {
             continue;