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

1 files changed, 4 insertions, 1 deletions

diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index 8fc8a3df4..e23828eea 100644
--- 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);