RFC Namespace contrained helper execution

Hi all,

Some time ago an attempt was made to update call_usermodehelper() to execute within it's namespace.

Comments at the time were basically that the approach didn't go nearly far enough to constrain the process.

This series attempts to remedy that by taking care to create an appropriate namespace environment then switch to it and setup fs_struct for path walking prior to the user mode helper thread runner calling do_execve().

Please review and comment on the patch series.
Ian

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Benjamin Coddington (1):
KEYS: exec request-key within the requesting task's namespace

Ian Kent (3):
vfs - fs/namespaces.c: break out mntns_setfs() from mntns_install() nsproxy - make create_new_namespaces() non-static
kmod - add call_usermodehelper_ns() helper

 fs/namespace.c              |   41 ++++++++++++++++++++++++++++-----------
 include/linux/kmod.h        |   17 ++++++++++++++++
 include/linux/mount.h       |    1 +
 include/linux/nsproxy.h     |    3 +++
 kernel/kmod.c               |   39 +++++++++++++++++++++++++++++++++++++
 kernel/nsproxy.c            |    2 +-
 security/keys/request_key.c |   45 +++++++++++++++++++++++++++++++++++++------
 7 files changed, 129 insertions(+), 19 deletions(-)

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