From bedcc244d968b2ae3daf30d2e8ef5209d93c80d0 Mon Sep 17 00:00:00 2001
From: krcroft <krcroft@users.noreply.github.com>
Date: Wed, 4 Dec 2019 20:18:52 -0800
Subject: [PATCH] STB Vorbis: Check before derefercing a potential NULL pointer

---
 src/libs/decoders/stb_vorbis.h | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/libs/decoders/stb_vorbis.h b/src/libs/decoders/stb_vorbis.h
index 77a7ee58..319b1d11 100644
--- a/src/libs/decoders/stb_vorbis.h
+++ b/src/libs/decoders/stb_vorbis.h
@@ -1333,14 +1333,20 @@ static int STBV_CDECL point_compare(const void *p, const void *q)
 static uint8 get8(vorb *z)
 {
    if (USE_MEMORY(z)) {
-      if (z->stream >= z->stream_end) { z->eof = TRUE; return 0; }
+      if (z->stream >= z->stream_end) {
+          z->eof = TRUE;
+          return 0;
+      }
       return *z->stream++;
    }
 
    #ifdef __SDL_SOUND_INTERNAL__
    {
       uint8 c;
-      if (SDL_RWread(z->rwops, &c, 1, 1) != 1) { z->eof = TRUE; return 0; }
+      if (z->rwops == NULL || SDL_RWread(z->rwops, &c, 1, 1) != 1) {
+          z->eof = TRUE;
+          return 0;
+      }
       return c;
    }
    #endif