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Paul Moore 5dbbaf2de8 tun: fix LSM/SELinux labeling of tun/tap devices ... This patch corrects some problems with LSM/SELinux that were introduced with the multiqueue patchset. The problem stems from the fact that the multiqueue work changed the relationship between the tun device and its associated socket; before the socket persisted for the life of the device, however after the multiqueue changes the socket only persisted for the life of the userspace connection (fd open). For non-persistent devices this is not an issue, but for persistent devices this can cause the tun device to lose its SELinux label. We correct this problem by adding an opaque LSM security blob to the tun device struct which allows us to have the LSM security state, e.g. SELinux labeling information, persist for the lifetime of the tun device. In the process we tweak the LSM hooks to work with this new approach to TUN device/socket labeling and introduce a new LSM hook, security_tun_dev_attach_queue(), to approve requests to attach to a TUN queue via TUNSETQUEUE. The SELinux code has been adjusted to match the new LSM hooks, the other LSMs do not make use of the LSM TUN controls. This patch makes use of the recently added "tun_socket:attach_queue" permission to restrict access to the TUNSETQUEUE operation. On older SELinux policies which do not define the "tun_socket:attach_queue" permission the access control decision for TUNSETQUEUE will be handled according to the SELinux policy's unknown permission setting. Signed-off-by: Paul Moore <pmoore@redhat.com> Acked-by: Eric Paris <eparis@parisplace.org> Tested-by: Jason Wang <jasowang@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>		12 years ago
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include	tun: fix LSM/SELinux labeling of tun/tap devices	12 years ago
ss	userns: Convert selinux to use kuid and kgid where appropriate	13 years ago
.gitignore	…
Kconfig	…
Makefile	…
avc.c	selinux: tag avc cache alloc as non-critical	13 years ago
exports.c	…
hooks.c	tun: fix LSM/SELinux labeling of tun/tap devices	12 years ago
netif.c	…
netlabel.c	…
netlink.c	netlink: hide struct module parameter in netlink_kernel_create	13 years ago
netnode.c	selinux: fix sel_netnode_insert() suspicious rcu dereference	12 years ago
netport.c	…
nlmsgtab.c	bridge: update selinux perm table for RTM_NEWMDB and RTM_DELMDB	12 years ago
selinuxfs.c	mm: kill vma flag VM_RESERVED and mm->reserved_vm counter	13 years ago
xfrm.c	…