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  1. 02 Sep, 2009 1 commit
    • David Howells's avatar
      CRED: Add some configurable debugging [try #6] · e0e81739
      David Howells authored 
      Add a config option (CONFIG_DEBUG_CREDENTIALS) to turn on some debug checking
for credential management.  The additional code keeps track of the number of
pointers from task_structs to any given cred struct, and checks to see that
this number never exceeds the usage count of the cred struct (which includes
all references, not just those from task_structs).

Furthermore, if SELinux is enabled, the code also checks that the security
pointer in the cred struct is never seen to be invalid.

This attempts to catch the bug whereby inode_has_perm() faults in an nfsd
kernel thread on seeing cred->security be a NULL pointer (it appears that the
credential struct has been previously released):

	http://www.kerneloops.org/oops.php?number=252883Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
      e0e81739
  3. 31 Aug, 2009 2 commits
    • Paul Moore's avatar
      selinux: Support for the new TUN LSM hooks · ed6d76e4
      Paul Moore authored 
      Add support for the new TUN LSM hooks: security_tun_dev_create(),
security_tun_dev_post_create() and security_tun_dev_attach().  This includes
the addition of a new object class, tun_socket, which represents the socks
associated with TUN devices.  The _tun_dev_create() and _tun_dev_post_create()
hooks are fairly similar to the standard socket functions but _tun_dev_attach()
is a bit special.  The _tun_dev_attach() is unique because it involves a
domain attaching to an existing TUN device and its associated tun_socket
object, an operation which does not exist with standard sockets and most
closely resembles a relabel operation.
Signed-off-by: default avatarPaul Moore <paul.moore@hp.com>
Acked-by: default avatarEric Paris <eparis@parisplace.org>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
      ed6d76e4
    • Paul Moore's avatar
      lsm: Add hooks to the TUN driver · 2b980dbd
      Paul Moore authored 
      The TUN driver lacks any LSM hooks which makes it difficult for LSM modules,
such as SELinux, to enforce access controls on network traffic generated by
TUN users; this is particularly problematic for virtualization apps such as
QEMU and KVM.  This patch adds three new LSM hooks designed to control the
creation and attachment of TUN devices, the hooks are:

 * security_tun_dev_create()
   Provides access control for the creation of new TUN devices

 * security_tun_dev_post_create()
   Provides the ability to create the necessary socket LSM state for newly
   created TUN devices

 * security_tun_dev_attach()
   Provides access control for attaching to existing, persistent TUN devices
   and the ability to update the TUN device's socket LSM state as necessary
Signed-off-by: default avatarPaul Moore <paul.moore@hp.com>
Acked-by: default avatarEric Paris <eparis@parisplace.org>
Acked-by: default avatarSerge Hallyn <serue@us.ibm.com>
Acked-by: default avatarDavid S. Miller <davem@davemloft.net>
Signed-off-by: default avatarJames Morris <jmorris@namei.org>
      2b980dbd
  5. 24 Aug, 2009 1 commit
  7. 21 Aug, 2009 2 commits
  9. 19 Aug, 2009 12 commits
  11. 18 Aug, 2009 22 commits
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