kmodloader: fix out-of-bound access when parsing .modinfo

[project/ubox.git] / kmodloader.c

diff --git a/kmodloader.c b/kmodloader.c
index 065ac82..c780379 100644 (file)
--- a/kmodloader.c
+++ b/kmodloader.c
@@ -302,12 +302,14 @@ static struct module* get_module_info(const char *module, const char *name)
        }
 
        strings = map + offset;
-       while (strings && (strings < map + offset + size)) {
+       while (true) {
                char *sep;
                int len;
 
                while (!strings[0])
                        strings++;
+               if (strings >= map + offset + size)
+                       break;
                sep = strstr(strings, "=");
                if (!sep)
                        break;
@@ -410,12 +412,14 @@ static int print_modinfo(char *module)
 
        strings = map + offset;
        printf("module:\t\t%s\n", module);
-       while (strings && (strings < map + offset + size)) {
+       while (true) {
                char *dup = NULL;
                char *sep;
 
                while (!strings[0])
                        strings++;
+               if (strings >= map + offset + size)
+                       break;
                sep = strstr(strings, "=");
                if (!sep)
                        break;