diff --git a/ggml-backend.c b/ggml-backend.c
index 526ddab67..526ce732b 100644
--- a/ggml-backend.c
+++ b/ggml-backend.c
@@ -330,6 +330,8 @@ size_t ggml_backend_reg_find_by_name(const char * name) {
             return i;
         }
     }
+
+    // not found
     return SIZE_MAX;
 }
 
@@ -340,15 +342,15 @@ ggml_backend_t ggml_backend_reg_init_backend_from_str(const char * backend_str)
     const char * params = strchr(backend_str, ':');
     char backend_name[128];
     if (params == NULL) {
-        strcpy(backend_name, backend_str);
+        snprintf(backend_name, sizeof(backend_name), "%s", backend_str);
         params = "";
     } else {
-        strncpy(backend_name, backend_str, params - backend_str);
-        backend_name[params - backend_str] = '\0';
+        snprintf(backend_name, sizeof(backend_name), "%.*s", (int)(params - backend_str), backend_str);
         params++;
     }
 
     size_t backend_i = ggml_backend_reg_find_by_name(backend_name);
+
     if (backend_i == SIZE_MAX) {
         fprintf(stderr, "%s: backend %s not found\n", __func__, backend_name);
         return NULL;
@@ -396,18 +398,12 @@ static void ggml_backend_cpu_buffer_free_buffer(ggml_backend_buffer_t buffer) {
 }
 
 static void ggml_backend_cpu_buffer_set_tensor(ggml_backend_buffer_t buffer, struct ggml_tensor * tensor, const void * data, size_t offset, size_t size) {
-    GGML_ASSERT(offset + size <= ggml_nbytes(tensor) && "tensor write out of bounds");
-    GGML_ASSERT(tensor->data != NULL && "tensor not allocated");
-
     memcpy((char *)tensor->data + offset, data, size);
 
     GGML_UNUSED(buffer);
 }
 
 static void ggml_backend_cpu_buffer_get_tensor(ggml_backend_buffer_t buffer, const struct ggml_tensor * tensor, void * data, size_t offset, size_t size) {
-    GGML_ASSERT(offset + size <= ggml_nbytes(tensor) && "tensor read out of bounds");
-    GGML_ASSERT(tensor->data != NULL && "tensor not allocated");
-
     memcpy(data, (const char *)tensor->data + offset, size);
 
     GGML_UNUSED(buffer);