ggml: fix div-by-zero (llama/9003)

Fixes: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=70724
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Signed-off-by: David Korczynski <redacted>

diff --git a/src/ggml.c b/src/ggml.c
index 364abc38da5fc12e519fb85fe119711a511477ba..790798cee0235d055f8a126a97dd623eaa6da9a9 100644 (file)
--- a/src/ggml.c
+++ b/src/ggml.c
@@ -21700,7 +21700,7 @@ struct gguf_context * gguf_init_from_file(const char * fname, struct gguf_init_p
                 (int64_t) info->ne[2] *
                 (int64_t) info->ne[3];
 
-            if (ne % ggml_blck_size(info->type) != 0) {
+            if (ggml_blck_size(info->type) == 0 || ne % ggml_blck_size(info->type) != 0) {
                 fprintf(stderr, "%s: tensor '%s' of type %d (%s) number of elements (%" PRId64 ") is not a multiple of block size (%" PRId64 ")\n",
                         __func__, info->name.data, (int) info->type, ggml_type_name(info->type), ne, ggml_blck_size(info->type));
                 fclose(file);