fix integer overflow issue for i386-pc

clearany · Feb 6, 2021 · 2185556 · 2185556
1 parent 97be7b8
commit 2185556
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/GRUB2/MOD_SRC/grub-2.04/grub-core/ventoy/ventoy.c b/GRUB2/MOD_SRC/grub-2.04/grub-core/ventoy/ventoy.c
@@ -553,7 +553,7 @@ static grub_err_t ventoy_cmd_mod(grub_extcmd_context_t ctxt, int argc, char **ar
     value1 = grub_strtoull(args[0], NULL, 10);
     value2 = grub_strtoull(args[1], NULL, 10);
 
-    grub_snprintf(buf, sizeof(buf), "%llu", (value1 % value2));
+    grub_snprintf(buf, sizeof(buf), "%llu", (value1 & (value2 - 1)));
     grub_env_set(args[2], buf);
 
     VENTOY_CMD_RETURN(GRUB_ERR_NONE);