1 files changed, 7 insertions, 6 deletions

diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index 99e487532..7508930f7 100644
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -101,8 +101,12 @@ static char *build_alias(char *alias, const char *device_name)
         return alias;
 }
 
-/* mknod in /dev based on a path like "/sys/block/hda/hda1" */
-/* NB: "mdev -s" may call us many times, do not leak memory/fds! */
+/* mknod in /dev based on a path like "/sys/block/hda/hda1"
+ * NB1: path parameter needs to have SCRATCH_SIZE scratch bytes
+ * after NUL, but we promise to not mangle (IOW: to restore if needed)
+ * path string.
+ * NB2: "mdev -s" may call us many times, do not leak memory/fds!
+ */
 static void make_device(char *path, int delete)
 {
         char *device_name;
@@ -565,10 +569,7 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
                                 make_device(temp, 1);
                 }
                 else if (strcmp(action, "add") == 0) {
-                        /* make_device mangles its parameter, use a copy */
-                        char *s = xstrdup(temp);
-                        make_device(s, 0);
-                        free(s);
+                        make_device(temp, 0);
                         if (ENABLE_FEATURE_MDEV_LOAD_FIRMWARE) {
                                 if (fw)
                                         load_firmware(fw, temp);