[mono] Avoid an assert if the class name table is too large. (#85952)

Fixes https://github.com/dotnet/runtime/issues/85917.

diff --git a/src/mono/mono/mini/aot-compiler.c b/src/mono/mono/mini/aot-compiler.c
index d1ed5a9..ab306ab 100644 (file)
--- a/src/mono/mono/mini/aot-compiler.c
+++ b/src/mono/mono/mini/aot-compiler.c
@@ -11646,11 +11646,15 @@ emit_class_name_table (MonoAotCompile *acfg)
        name_p = name_buf = (guint8 *)g_malloc0 (name_buf_size);
 #endif
 
+       guint table_len = table->len;
+       if (table_size > 65000 || table->len > 65000) {
+               table_size = 0;
+               table_len = 0;
+       }
+
        /* FIXME: Optimize memory usage */
-       g_assert (table_size < 65000);
        encode_int16 (GINT_TO_UINT16 (table_size), p, &p);
-       g_assert (table->len < 65000);
-       for (guint i = 0; i < table->len; ++i) {
+       for (guint i = 0; i < table_len; ++i) {
                entry = (ClassNameTableEntry *)g_ptr_array_index (table, i);
                if (entry == NULL) {
                        encode_int16 (0, p, &p);

diff --git a/src/mono/mono/mini/aot-runtime.c b/src/mono/mono/mini/aot-runtime.c
index 84b0328..1b273de 100644 (file)
--- a/src/mono/mono/mini/aot-runtime.c
+++ b/src/mono/mono/mini/aot-runtime.c
@@ -2639,6 +2639,9 @@ mono_aot_get_class_from_name (MonoImage *image, const char *name_space, const ch
        table_size = amodule->class_name_table [0];
        table = amodule->class_name_table + 1;
 
+       if (table_size == 0)
+               return FALSE;
+
        if (name_space [0] == '\0')
                full_name = g_strdup_printf ("%s", name);
        else {