main: fix coverity error in _mesa_program_resource_find_name()

We did not take into account if name is NULL, so we could dereference
a NULL pointer in strncmp() call.

Signed-off-by: Samuel Iglesias Gonsálvez <siglesias@igalia.com>
Reviewed-by: Tapani Pälli <tapani.palli@intel.com>

diff --git a/src/mesa/main/shader_query.cpp b/src/mesa/main/shader_query.cpp
index 1a50abc..9a16a28 100644 (file)
--- a/src/mesa/main/shader_query.cpp
+++ b/src/mesa/main/shader_query.cpp
@@ -581,8 +581,11 @@ _mesa_program_resource_find_name(struct gl_shader_program *shProg,
 {
    struct gl_program_resource *res = NULL;
 
+   if (name == NULL)
+      return NULL;
+
    /* If we have a name, try the ProgramResourceHash first. */
-   if (name && shProg->data->ProgramResourceHash)
+   if (shProg->data->ProgramResourceHash)
       res = search_resource_hash(shProg, programInterface, name, array_index);
 
    if (res)