2 files changed, 7 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/tgsi/Makefile b/src/gallium/auxiliary/tgsi/Makefile
index 806a2bd4c52..c5d2082087c 100644
--- a/src/gallium/auxiliary/tgsi/Makefile
+++ b/src/gallium/auxiliary/tgsi/Makefile
@@ -4,6 +4,7 @@ include $(TOP)/configs/current
 LIBNAME = tgsi
 
 C_SOURCES = \
+	tgsi_sanity.c \
 	tgsi_build.c \
 	tgsi_dump.c \
 	tgsi_exec.c \
diff --git a/src/gallium/auxiliary/tgsi/tgsi_sanity.c b/src/gallium/auxiliary/tgsi/tgsi_sanity.c
index c6590272969..20b32477be3 100644
--- a/src/gallium/auxiliary/tgsi/tgsi_sanity.c
+++ b/src/gallium/auxiliary/tgsi/tgsi_sanity.c
@@ -152,6 +152,12 @@ check_register_usage(
 {
    if (!check_file_name( ctx, file ))
       return FALSE;
+
+   if (index < 0 || index > MAX_REGISTERS) {
+      report_error( ctx, "%s[%i]: Invalid index %s", file_names[file], index, name );
+      return FALSE;
+   }
+
    if (indirect_access) {
       if (!is_any_register_declared( ctx, file ))
          report_error( ctx, "%s: Undeclared %s register", file_names[file], name );