translate: assert that nr_elements is in range

This just ensures that we don't end up reading/writing outside of the
space reserved in the key. This would have made it easier to to track
down the issue in the previous commit faster.

Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10730>

diff --git a/src/gallium/auxiliary/translate/translate.h b/src/gallium/auxiliary/translate/translate.h
index 0b50020..b70d90b 100644 (file)
--- a/src/gallium/auxiliary/translate/translate.h
+++ b/src/gallium/auxiliary/translate/translate.h
@@ -139,6 +139,7 @@ boolean translate_is_output_format_supported(enum pipe_format format);
 
 static inline int translate_keysize( const struct translate_key *key )
 {
+   assert(key->nr_elements <= TRANSLATE_MAX_ATTRIBS);
    return 2 * sizeof(int) + key->nr_elements * sizeof(struct translate_element);
 }