1 files changed, 4 insertions, 3 deletions

diff --git a/modutils/insmod.c b/modutils/insmod.c
index a81ca7fba..b9d8a0243 100644
--- a/modutils/insmod.c
+++ b/modutils/insmod.c
@@ -4262,6 +4262,7 @@ int insmod_ng_main(int argc, char **argv)
 {
         long ret;
         size_t len;
+        int optlen;
         void *map;
         char *filename, *options;
 
@@ -4270,12 +4271,12 @@ int insmod_ng_main(int argc, char **argv)
                 bb_show_usage();
 
         /* Rest is options */
-        options = xstrdup("");
+        options = xzalloc(1);
+        optlen = 0;
         while (*++argv) {
-                int optlen = strlen(options);
                 options = xrealloc(options, optlen + 2 + strlen(*argv) + 2);
                 /* Spaces handled by "" pairs, but no way of escaping quotes */
-                sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
+                optlen += sprintf(options + optlen, (strchr(*argv,' ') ? "\"%s\" " : "%s "), *argv);
         }
 
 #if 0