From 715f8d42a2bd554c9f4960a45594dcc5f9236ebc Mon Sep 17 00:00:00 2001
From: Sam Lantinga <slouken@libsdl.org>
Date: Fri, 14 Feb 2020 16:15:46 -0800
Subject: [PATCH] Fixed bug 4986 - Memory leak in HIDAPI_JoystickConnected

meyraud705

Memory allocated for device->joysticks on line 589 of SDL_hidapijoystick.c is never freed.

Also, use memmove because memory is overlapping.
---
 src/joystick/hidapi/SDL_hidapijoystick.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/joystick/hidapi/SDL_hidapijoystick.c b/src/joystick/hidapi/SDL_hidapijoystick.c
index a2e91a320..de87fbcb8 100644
--- a/src/joystick/hidapi/SDL_hidapijoystick.c
+++ b/src/joystick/hidapi/SDL_hidapijoystick.c
@@ -616,9 +616,13 @@ HIDAPI_JoystickDisconnected(SDL_HIDAPI_Device *device, SDL_JoystickID joystickID
                 HIDAPI_JoystickClose(joystick);
             }
 
-            SDL_memcpy(&device->joysticks[i], &device->joysticks[i+1], device->num_joysticks - i - 1);
+            SDL_memmove(&device->joysticks[i], &device->joysticks[i+1], device->num_joysticks - i - 1);
             --device->num_joysticks;
             --SDL_HIDAPI_numjoysticks;
+            if (device->num_joysticks == 0) {
+                SDL_free(device->joysticks);
+                device->joysticks = NULL;
+            }
 
             if (!shutting_down) {
                 SDL_PrivateJoystickRemoved(joystickID);