LSM: Module stacking in support of S.A.R.A and Landlock v2: Reduce the patchset to what is required to support the proposed S.A.R.A. and LandLock security modules
The S.A.R.A. security module is intended to be used in conjunction with other security modules. It requires state to be maintained for the credential, which in turn requires a mechanism for sharing the credential security blob. The module also requires mechanism for user space manipulation of the credential information, hence an additional subdirectory in /proc/.../attr. The LandLock security module provides user configurable policy in the secmark mechanism. It requires data in the credential, file and inode security blobs. For this to be used along side the existing "major" security modules mechanism for sharing these blobs is provided. A side effect of providing sharing of the crendential security blob is that the TOMOYO module can be used at the same time as the other "major" modules. The mechanism for configuring which security modules are enabled has to change when stacking in enabled. Any module that uses just the security blobs that are shared can be selected. Additionally, one other "major" module can be selected. The security module stacking issues around networking and IPC are not addressed here as they are beyond what is required for TOMOYO, S.A.R.A and LandLock. git://github.com/cschaufler/lsm-stacking.git#stacking-4.19-rc2-saralock Signed-off-by: Casey Schaufler <ca...@schaufler-ca.com> --- Documentation/admin-guide/LSM/index.rst | 23 ++- fs/proc/base.c | 64 ++++++- fs/proc/internal.h | 1 + include/linux/lsm_hooks.h | 20 ++- include/linux/security.h | 15 +- kernel/cred.c | 13 -- security/Kconfig | 92 ++++++++++ security/apparmor/domain.c | 2 +- security/apparmor/include/cred.h | 24 ++- security/apparmor/include/file.h | 9 +- security/apparmor/include/lib.h | 4 + security/apparmor/lsm.c | 53 ++++-- security/apparmor/task.c | 6 +- security/security.c | 293 ++++++++++++++++++++++++++++++-- security/selinux/hooks.c | 215 ++++++++--------------- security/selinux/include/objsec.h | 37 +++- security/selinux/selinuxfs.c | 5 +- security/selinux/xfrm.c | 4 +- security/smack/smack.h | 42 ++++- security/smack/smack_access.c | 4 +- security/smack/smack_lsm.c | 283 +++++++++++------------------- security/smack/smackfs.c | 18 +- security/tomoyo/common.h | 31 +++- security/tomoyo/domain.c | 4 +- security/tomoyo/securityfs_if.c | 15 +- security/tomoyo/tomoyo.c | 57 +++++-- 26 files changed, 899 insertions(+), 435 deletions(-) _______________________________________________ Selinux mailing list Selinux@tycho.nsa.gov To unsubscribe, send email to selinux-le...@tycho.nsa.gov. To get help, send an email containing "help" to selinux-requ...@tycho.nsa.gov.