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fix unchecked indices buffer overflow

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This commit is contained in:
MihailRis 2026-01-08 20:06:23 +03:00
parent 8fc83c08e2
commit 336ae09f66
1 changed files with 12 additions and 5 deletions
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17
src/graphics/render/BlocksRenderer.cpp
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@ -80,7 +80,7 @@ void BlocksRenderer::face(
const glm::vec4(&lights)[4],
const glm::vec4& tint
) {
if (vertexCount + 4 >= capacity) {
if (vertexCount + 4 >= capacity || indexCount + 6 >= capacity) {
overflow = true;
return;
}
@ -120,7 +120,7 @@ void BlocksRenderer::faceAO(
const UVRegion& region,
bool lights
) {
if (vertexCount + 4 >= capacity) {
if (vertexCount + 4 >= capacity || indexCount + 6 >= capacity) {
overflow = true;
return;
}
@ -159,7 +159,7 @@ void BlocksRenderer::face(
glm::vec4 tint,
bool lights
) {
if (vertexCount + 4 >= capacity) {
if (vertexCount + 4 >= capacity || indexCount + 6 >= capacity) {
overflow = true;
return;
}
@ -305,12 +305,15 @@ void BlocksRenderer::blockCustomModel(
const auto& model = cache.getModel(block.rt.id, block.getVariantIndex(states.userbits));
for (const auto& mesh : model.meshes) {
if (vertexCount + mesh.vertices.size() >= capacity) {
if (vertexCount + mesh.vertices.size() >= capacity
|| indexCount + mesh.vertices.size() >= capacity) {
overflow = true;
return;
}
bool shading = mesh.shading && !block.shadeless;
for (int triangle = 0; triangle < mesh.vertices.size() / 3; triangle++) {
int trianglesCount = mesh.vertices.size() / 3;
for (int triangle = 0; triangle < trianglesCount; triangle++) {
auto r = mesh.vertices[triangle * 3 + (triangle % 2) * 2].coord -
mesh.vertices[triangle * 3 + 1].coord;
r = r.x * X + r.y * Y + r.z * Z;
@ -778,6 +781,10 @@ ChunkMesh BlocksRenderer::render(
const Chunk* chunk, const VoxelsVolume& volume
) {
build(chunk, volume);
assert(vertexCount <= capacity);
assert(indexCount <= capacity);
assert(denseIndexCount <= capacity);
return ChunkMesh{std::make_unique<Mesh<ChunkVertex>>(
vertexBuffer.get(), vertexCount,