1 files changed, 10 insertions, 3 deletions

diff --git a/coreutils/install.c b/coreutils/install.c
index e68589229..d0dcd0e89 100644
--- a/coreutils/install.c
+++ b/coreutils/install.c
@@ -209,9 +209,16 @@ int install_main(int argc, char **argv)
                         dest = last;
                         if (opts & OPT_MKDIR_LEADING) {
                                 char *ddir = xstrdup(dest);
-                                bb_make_directory(dirname(ddir), 0755, mkdir_flags);
-                                /* errors are not checked. copy_file
-                                 * will fail if dir is not created. */
+                                char *dn = dirname(ddir);
+                                /* musl can return read-only "/" or "." string.
+                                 * bb_make_directory needs writable string.
+                                 */
+                                if ((dn[0] != '/' && dn[0] != '.') || dn[1] != '\0') {
+                                        bb_make_directory(dn, 0755, mkdir_flags);
+                                        /* errors are not checked. copy_file
+                                         * will fail if dir is not created.
+                                         */
+                                }
                                 free(ddir);
                         }
                         if (isdir)