From: havoc <havoc@d7cf8633-e32d-0410-b094-e92efae38249>
Date: Thu, 30 Sep 2010 20:35:12 +0000 (+0000)
Subject: don't crash in obj loading if v, vt, or vn are NULL or the indices are
X-Git-Tag: xonotic-v0.1.0preview~56^2~109
X-Git-Url: https://git.rm.cloudns.org/?a=commitdiff_plain;h=efe66e1a99b2ad1b6aaa2a5c131237b9cb7b4ee4;p=xonotic%2Fdarkplaces.git

don't crash in obj loading if v, vt, or vn are NULL or the indices are
invalid


git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@10508 d7cf8633-e32d-0410-b094-e92efae38249
---

diff --git a/model_brush.c b/model_brush.c
index 9c7c9ad4..fc63c983 100644
--- a/model_brush.c
+++ b/model_brush.c
@@ -7383,9 +7383,12 @@ void Mod_OBJ_Load(dp_model_t *mod, void *buffer, void *bufferend)
 				vcurrent.nextindex = -1;
 				vcurrent.textureindex = textureindex;
 				vcurrent.submodelindex = submodelindex;
-				VectorCopy(v + 3*index1, vcurrent.v);
-				Vector2Copy(vt + 2*index2, vcurrent.vt);
-				VectorCopy(vn + 3*index3, vcurrent.vn);
+				if (v && index1 >= 0 && index1 < numv)
+					VectorCopy(v + 3*index1, vcurrent.v);
+				if (vt && index2 >= 0 && index2 < numvt)
+					Vector2Copy(vt + 2*index2, vcurrent.vt);
+				if (vn && index3 >= 0 && index3 < numvn)
+					VectorCopy(vn + 3*index3, vcurrent.vn);
 				if (numtriangles == 0)
 				{
 					VectorCopy(vcurrent.v, mins);