MAINT-3179 fix bad indexing of position info generating false alarms on range checks, issue with free of data now allocated contig with positions instead, and added copious amounts of llwarns to error return sites so 'invalid element' will be a reason to read the log and not a tease.

1 files changed, 15 insertions, 2 deletions

diff --git a/indra/llprimitive/llmodel.cpp b/indra/llprimitive/llmodel.cpp
index 37f0bfcbb8..34e0483a83 100755
--- a/indra/llprimitive/llmodel.cpp
+++ b/indra/llprimitive/llmodel.cpp
@@ -166,6 +166,7 @@ LLModel::EModelStatus load_face_from_dom_triangles(std::vector<LLVolumeFace>& fa
 
 	if ( !get_dom_sources(inputs, pos_offset, tc_offset, norm_offset, idx_stride, pos_source, tc_source, norm_source) || !pos_source )
 	{
+		llwarns << "Could not find dom sources for basic geo data; invalid model." << llendl;
 		return LLModel::BAD_ELEMENT;
 	}
 
@@ -201,6 +202,7 @@ LLModel::EModelStatus load_face_from_dom_triangles(std::vector<LLVolumeFace>& fa
 			if (((i + pos_offset) > index_count)
 			 || ((idx[i+pos_offset]*3+2) > vertex_count))
 			{
+				llwarns << "Out of range index data; invalid model." << llendl;
 				return LLModel::BAD_ELEMENT;
 			}
 
@@ -210,6 +212,7 @@ LLModel::EModelStatus load_face_from_dom_triangles(std::vector<LLVolumeFace>& fa
 
 			if (!cv.getPosition().isFinite3())
 			{
+				llwarns << "Nan positional data, invalid model." << llendl;
 				return LLModel::BAD_ELEMENT;
 			}
 		}
@@ -222,6 +225,7 @@ LLModel::EModelStatus load_face_from_dom_triangles(std::vector<LLVolumeFace>& fa
 			if (((i + tc_offset) > index_count)
 			 || ((idx[i+tc_offset]*2+1) > tc_count))
 			{
+				llwarns << "Out of range TC indices." << llendl;
 				return LLModel::BAD_ELEMENT;
 			}
 
@@ -242,6 +246,7 @@ LLModel::EModelStatus load_face_from_dom_triangles(std::vector<LLVolumeFace>& fa
 			if (((i + norm_offset) > index_count)
 				|| ((idx[i+norm_offset]*3+2) > norm_count))
 			{
+				llwarns << "Found out of range norm indices, invalid model." << llendl;
 				return LLModel::BAD_ELEMENT;
 			}
 
@@ -380,6 +385,7 @@ LLModel::EModelStatus load_face_from_dom_polylist(std::vector<LLVolumeFace>& fac
 
 	if (!get_dom_sources(inputs, pos_offset, tc_offset, norm_offset, idx_stride, pos_source, tc_source, norm_source))
 	{
+		llwarns << "Could not get DOM sources for basic geo data, invalid model." << llendl;
 		return LLModel::BAD_ELEMENT;
 	}
 
@@ -430,9 +436,10 @@ LLModel::EModelStatus load_face_from_dom_polylist(std::vector<LLVolumeFace>& fac
 			{
 				// guard against model data specifiying out of range indices or verts
 				//
-				if (((i + pos_offset) > index_count)
-				 || ((idx[i+pos_offset]*3+2) > vertex_count))
+				if (((cur_idx + pos_offset) > index_count)
+				 || ((idx[cur_idx+pos_offset]*3+2) > vertex_count))
 				{
+					llwarns << "Out of range position indices, invalid model." << llendl;
 					return LLModel::BAD_ELEMENT;
 				}
 
@@ -455,6 +462,7 @@ LLModel::EModelStatus load_face_from_dom_polylist(std::vector<LLVolumeFace>& fac
 				if (((cur_idx + tc_offset) > index_count)
 				 || ((idx[cur_idx+tc_offset]*2+1) > tc_count))
 				{
+					llwarns << "Out of range TC indices, invalid model." << llendl;
 					return LLModel::BAD_ELEMENT;
 				}
 
@@ -475,6 +483,7 @@ LLModel::EModelStatus load_face_from_dom_polylist(std::vector<LLVolumeFace>& fac
 				if (((cur_idx + norm_offset) > index_count)
 				 || ((idx[cur_idx+norm_offset]*3+2) > norm_count))
 				{
+					llwarns << "Out of range norm indices, invalid model." << llendl;
 					return LLModel::BAD_ELEMENT;
 				}
 
@@ -653,6 +662,7 @@ LLModel::EModelStatus load_face_from_dom_polygons(std::vector<LLVolumeFace>& fac
 			domVertices* vertices = (domVertices*) elem.cast();
 			if (!vertices)
 			{
+				llwarns << "Could not find vertex source, invalid model." << llendl;
 				return LLModel::BAD_ELEMENT;
 			}
 			domInputLocal_Array& v_inp = vertices->getInput_array();
@@ -666,6 +676,7 @@ LLModel::EModelStatus load_face_from_dom_polygons(std::vector<LLVolumeFace>& fac
 					domSource* src = (domSource*) elem.cast();
 					if (!src)
 					{
+						llwarns << "Could not find DOM source, invalid model." << llendl;
 						return LLModel::BAD_ELEMENT;
 					}
 					v = &(src->getFloat_array()->getValue());
@@ -681,6 +692,7 @@ LLModel::EModelStatus load_face_from_dom_polygons(std::vector<LLVolumeFace>& fac
 			domSource* src = (domSource*) elem.cast();
 			if (!src)
 			{
+				llwarns << "Could not find DOM source, invalid model." << llendl;
 				return LLModel::BAD_ELEMENT;
 			}
 			n = &(src->getFloat_array()->getValue());
@@ -693,6 +705,7 @@ LLModel::EModelStatus load_face_from_dom_polygons(std::vector<LLVolumeFace>& fac
 			domSource* src = (domSource*) elem.cast();
 			if (!src)
 			{
+				llwarns << "Could not find DOM source, invalid model." << llendl;
 				return LLModel::BAD_ELEMENT;
 			}
 			t = &(src->getFloat_array()->getValue());