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| author | Eric W. Biederman <ebiederm@xmission.com> | 2012-07-26 05:15:35 -0700 |
|---|---|---|
| committer | Eric W. Biederman <ebiederm@xmission.com> | 2012-11-20 04:18:14 -0800 |
| commit | b2e0d98705e60e45bbb3c0032c48824ad7ae0704 (patch) | |
| tree | e187c82e1c3babd34095f2b946614131719bbb03 /kernel/nsproxy.c | |
| parent | cde1975bc242f3e1072bde623ef378e547b73f91 (diff) | |
| download | olio-linux-3.10-b2e0d98705e60e45bbb3c0032c48824ad7ae0704.tar.xz olio-linux-3.10-b2e0d98705e60e45bbb3c0032c48824ad7ae0704.zip | |
userns: Implement unshare of the user namespace
- Add CLONE_THREAD to the unshare flags if CLONE_NEWUSER is selected
As changing user namespaces is only valid if all there is only
a single thread.
- Restore the code to add CLONE_VM if CLONE_THREAD is selected and
the code to addCLONE_SIGHAND if CLONE_VM is selected.
Making the constraints in the code clear.
Acked-by: Serge Hallyn <serge.hallyn@canonical.com>
Signed-off-by: "Eric W. Biederman" <ebiederm@xmission.com>
Diffstat (limited to 'kernel/nsproxy.c')
| -rw-r--r-- | kernel/nsproxy.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/kernel/nsproxy.c b/kernel/nsproxy.c index 2ddd81657a2..78e2ecb2016 100644 --- a/kernel/nsproxy.c +++ b/kernel/nsproxy.c @@ -186,7 +186,7 @@ void free_nsproxy(struct nsproxy *ns) * On success, returns the new nsproxy. */ int unshare_nsproxy_namespaces(unsigned long unshare_flags, - struct nsproxy **new_nsp, struct fs_struct *new_fs) + struct nsproxy **new_nsp, struct cred *new_cred, struct fs_struct *new_fs) { struct user_namespace *user_ns; int err = 0; @@ -195,12 +195,12 @@ int unshare_nsproxy_namespaces(unsigned long unshare_flags, CLONE_NEWNET | CLONE_NEWPID))) return 0; - if (!nsown_capable(CAP_SYS_ADMIN)) + user_ns = new_cred ? new_cred->user_ns : current_user_ns(); + if (!ns_capable(user_ns, CAP_SYS_ADMIN)) return -EPERM; - user_ns = current_user_ns(); *new_nsp = create_new_namespaces(unshare_flags, current, user_ns, - new_fs ? new_fs : current->fs); + new_fs ? new_fs : current->fs); if (IS_ERR(*new_nsp)) { err = PTR_ERR(*new_nsp); goto out; |