mdev: fix a case where we mangle device_path string and then use it.

[oweals/busybox.git] / util-linux / mdev.c

diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index 8fc8a3df4579cf6e4d580328511942c1fde805a5..e23828eea366999562d1911388aca4539fc127d7 100644 (file)
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -564,7 +564,10 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
                                make_device(temp, 1);
                }
                else if (strcmp(action, "add") == 0) {
-                       make_device(temp, 0);
+                       /* make_device mangles its parameter, use a copy */
+                       char *s = xstrdup(temp);
+                       make_device(s, 0);
+                       free(s);
                        if (ENABLE_FEATURE_MDEV_LOAD_FIRMWARE) {
                                if (fw)
                                        load_firmware(fw, temp);