From 13b1845214bcc5e37accd6c0cef524abb694c0c5 Mon Sep 17 00:00:00 2001 From: Giuseppe Scrivano Date: Thu, 2 Aug 2018 14:27:20 +0200 Subject: rootless: do not set setgroups to deny when using newuidmap It is required only when directly configuring the user namespace. Signed-off-by: Giuseppe Scrivano Closes: #1200 Approved by: rhatdan --- pkg/rootless/rootless_linux.go | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'pkg/rootless/rootless_linux.go') diff --git a/pkg/rootless/rootless_linux.go b/pkg/rootless/rootless_linux.go index 3d6402040..d34782171 100644 --- a/pkg/rootless/rootless_linux.go +++ b/pkg/rootless/rootless_linux.go @@ -95,12 +95,6 @@ func BecomeRootInUserNS() (bool, int, error) { return false, -1, errors.Errorf("cannot re-exec process") } - setgroups := fmt.Sprintf("/proc/%d/setgroups", pid) - err = ioutil.WriteFile(setgroups, []byte("deny\n"), 0666) - if err != nil { - return false, -1, errors.Wrapf(err, "cannot write setgroups file") - } - var uids, gids []idtools.IDMap username := os.Getenv("USER") mappings, err := idtools.NewIDMappings(username, username) @@ -117,6 +111,12 @@ func BecomeRootInUserNS() (bool, int, error) { uidsMapped = tryMappingTool("newuidmap", pid, os.Getuid(), uids) == nil } if !uidsMapped { + setgroups := fmt.Sprintf("/proc/%d/setgroups", pid) + err = ioutil.WriteFile(setgroups, []byte("deny\n"), 0666) + if err != nil { + return false, -1, errors.Wrapf(err, "cannot write setgroups file") + } + uidMap := fmt.Sprintf("/proc/%d/uid_map", pid) err = ioutil.WriteFile(uidMap, []byte(fmt.Sprintf("%d %d 1\n", 0, os.Getuid())), 0666) if err != nil { -- cgit v1.2.3-54-g00ecf