These patches came about after looking at 5G open source in particular the updated 5G GTP driver at [1]. As this driver is still under development, testing the LSM/SELinux hooks on the current stable version in kernel selinux-next [2] seems best. As [1] uses the same base code as the current 3G version (except that it handles different packet types) they should port over. To test the GTP driver there is an RFC patch for the selinux-testsuite that will be posted. To enable the selinux-testsuite GTP tests, the libgtpnl [3] library and tools needed to be modified to: Return ERRNO on error to detect EACCES, Add gtp_match_tunnel function, Allow gtp-link to specify port numbers for multiple instances to run in the same namespace (not sure if this happens in real life). A patch for libgtpnl is supplied in the selinux-testsuite patch as well as setup/test instructions (libgtpnl is not packaged by Fedora) These patches were tested on Fedora 32 with kernel [2] using the 'targeted' policy. They have not been tested on a any type of 3G setup. [1] https://github.com/PrinzOwO/gtp5g [2] https://github.com/SELinuxProject/selinux-kernel [3] git://git.osmocom.org/libgtpnl.git Richard Haines (3): security: Add GPRS Tunneling Protocol (GTP) security hooks gtp: Add LSM hooks to GPRS Tunneling Protocol (GTP) selinux: Add SELinux GTP support Documentation/security/GTP.rst | 98 +++++++++++++++++++++++++++++ Documentation/security/index.rst | 1 + drivers/net/gtp.c | 49 ++++++++++++++- include/linux/lsm_hook_defs.h | 3 + include/linux/lsm_hooks.h | 16 +++++ include/linux/security.h | 19 ++++++ security/security.c | 18 ++++++ security/selinux/hooks.c | 64 +++++++++++++++++++ security/selinux/include/classmap.h | 2 + security/selinux/include/objsec.h | 4 ++ 10 files changed, 273 insertions(+), 1 deletion(-) create mode 100644 Documentation/security/GTP.rst -- 2.26.2
