process-util: add option for cloning with CLONE_NEWUSER

This is useful for allocating a userns fd later on for use in idmapped mounts.
2021-05-07 22:43:42 +02:00
parent 14a25e1fae
commit 5f9687363a
2 changed files with 5 additions and 2 deletions
@@ -1306,8 +1306,10 @@ int safe_fork_full(
                saved_ssp = &saved_ss;
        }

-        if (flags & FORK_NEW_MOUNTNS)
-                pid = raw_clone(SIGCHLD|CLONE_NEWNS);
+        if ((flags & (FORK_NEW_MOUNTNS|FORK_NEW_USERNS)) != 0)
+                pid = raw_clone(SIGCHLD|
+                                (FLAGS_SET(flags, FORK_NEW_MOUNTNS) ? CLONE_NEWNS : 0) |
+                                (FLAGS_SET(flags, FORK_NEW_USERNS) ? CLONE_NEWUSER : 0));
        else
                pid = fork();
        if (pid < 0)