glsl/linker: link error on too many subroutine functions.

This fixes:
GL45-CTS.explicit_uniform_location.subroutine-index-negative-link-max-num-of-indices

Reviewed-by: Chris Forbes <chrisforbes@google.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>

diff --git a/src/compiler/glsl/linker.cpp b/src/compiler/glsl/linker.cpp
index ef8db563bb288dca14f91934c76715e98c8715ad..4c567fca549485b962b78265fd46b39e43f37f61 100644 (file)
--- a/src/compiler/glsl/linker.cpp
+++ b/src/compiler/glsl/linker.cpp
@@ -4229,6 +4229,10 @@ link_assign_subroutine_types(struct gl_shader_program *prog)
          if (!fn->num_subroutine_types)
             continue;
 
+         if (sh->NumSubroutineFunctions + 1 > MAX_SUBROUTINES) {
+            linker_error(prog, "Too many subroutine functions declared.\n");
+            return;
+         }
          sh->SubroutineFunctions = reralloc(sh, sh->SubroutineFunctions,
                                             struct gl_subroutine_function,
                                             sh->NumSubroutineFunctions + 1);