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gallivm/nir: don't access stream var outside bounds

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Since we allocate only enough for streams we see, don't access
out of bounds when streams are given

Reviewed-by: Roland Scheidegger <sroland@vmware.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5555>
This commit is contained in:
Dave Airlie
2020-06-19 16:18:22 +10:00
parent 21b903dd7d
commit 690238ff56
1 changed files with 4 additions and 0 deletions
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4
src/gallium/auxiliary/gallivm/lp_bld_nir_soa.c
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@@ -1593,6 +1593,8 @@ static void emit_vertex(struct lp_build_nir_context *bld_base, uint32_t stream_i
struct lp_build_nir_soa_context *bld = (struct lp_build_nir_soa_context *)bld_base;
LLVMBuilderRef builder = bld->bld_base.base.gallivm->builder;
if (stream_id >= bld->gs_vertex_streams)
return;
assert(bld->gs_iface->emit_vertex);
LLVMValueRef total_emitted_vertices_vec =
LLVMBuildLoad(builder, bld->total_emitted_vertices_vec_ptr[stream_id], "");
@@ -1617,6 +1619,8 @@ end_primitive_masked(struct lp_build_nir_context * bld_base,
struct lp_build_nir_soa_context *bld = (struct lp_build_nir_soa_context *)bld_base;
LLVMBuilderRef builder = bld->bld_base.base.gallivm->builder;
if (stream_id >= bld->gs_vertex_streams)
return;
struct lp_build_context *uint_bld = &bld_base->uint_bld;
LLVMValueRef emitted_vertices_vec =
LLVMBuildLoad(builder, bld->emitted_vertices_vec_ptr[stream_id], "");