LSM: Module stacking for SARA and Landlock

The combined series of LSM refactoring and addition of blob-sharing for SARA and Landlock. -----BEGIN PGP SIGNATURE----- Comment: Kees Cook <kees@outflux.net> iQJKBAABCgA0FiEEpcP2jyKd1g9yPm4TiXL039xtwCYFAlw1FxwWHGtlZXNjb29r QGNocm9taXVtLm9yZwAKCRCJcvTf3G3AJkojD/9DGggNLcmzsb/6foOMAB2PSK3x t93eBgQRwzf7w8EnnJiKwj4ruKxYEcoePL/w1iGgY27jbnB43gcuhq7x2K3vC4v6 Toqr5f2Yw7CTiDd9vntCAXEyWThfCwKScuVkkjUtmKTTUjboOiTBZugzS//zIHuV Eyjeu44HSAnVLFW5YSALawxYoZAFmFvkF1iLgjwNpNyzXy9blO8To3ybfFWpRcpA Xr2H/kJlkCmzibblgQ4U9Dxg8q2qgc/CZ0dnKdtqVYtNGNZn8+owjw9hp63xxmvP ROdz3s2AACkp1JYqBjxl0g6M1BrfcDAleUSO+2iSfkh+BiwcyuLRrBgL8KDgE/rY Vxtf3I+LWApw+ZDs+hgy6Yj+N8U58B7VjbsPKw9HkDN0RTmwjXT4NJf+FJnbQbfS 9SwiBOWthTPHnZb0sXd/SQ8iWmEE42jbF5nybUlb+eICuM5jWm4dJks/GzK2eL4R SyTiMqccwdW30VNCn+PVxh0Bw04dov8X/8pr/NDmcalnsDn2avtIoNA5YIZy7pC/ uZtPeBWUt2Aa/W1cUFEnqXRUlJ1CuyKpRJJnpwRhMZT6HQ4jDdVEbuxcoWhiN7aL jsjPIoyZcR25simJzX/pruB0cCIhW44SaFFZv2IzMmYcpkMBpJGZuLQHRjdcR32I HP5lYtbnknx5CT9N7g== =q5MM -----END PGP SIGNATURE----- Merge tag 'blob-stacking-security-next' of https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux into next-general LSM: Module stacking for SARA and Landlock The combined series of LSM refactoring and addition of blob-sharing for SARA and Landlock. From Casey: v5: Include Kees Cook's rework of the lsm command line interface. v4: Finer granularity in the patches and other cleanups suggested by Kees Cook. Removed dead code created by the removal of SELinux credential blob poisoning. v3: Add ipc blob for SARA and task blob for Landlock. Removing the SELinux cred blob pointer poisoning results selinux_is_enabled() being unused, so it and all it's overhead has been removed. Broke up the cred infrastructure patch. v2: Reduce the patchset to what is required to support the proposed SARA and LandLock security modules The SARA 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. It also uses the ipc 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, inode and task security blobs. For this to be used along side the existing "major" security modules mechanism for sharing these blobs are 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, SARA and LandLock.
2026-11-13 07:31:07 +00:00 · 2019-01-10 11:42:58 -08:00 · 2019-01-10 11:42:58 -08:00 · 2233975cd7
commit 2233975cd7
parent 49e41801b3 a5e2fe7ede
39 changed files with 1133 additions and 793 deletions
--- a/Documentation/admin-guide/LSM/index.rst
+++ b/Documentation/admin-guide/LSM/index.rst
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
--- a/include/linux/cred.h
+++ b/include/linux/cred.h
--- a/include/linux/lsm_hooks.h
+++ b/include/linux/lsm_hooks.h
--- a/include/linux/security.h
+++ b/include/linux/security.h
--- a/include/linux/selinux.h
+++ b/include/linux/selinux.h
--- a/kernel/cred.c
+++ b/kernel/cred.c
--- a/security/Kconfig
+++ b/security/Kconfig
--- a/security/apparmor/Kconfig
+++ b/security/apparmor/Kconfig
--- a/security/apparmor/domain.c
+++ b/security/apparmor/domain.c
--- a/security/apparmor/include/cred.h
+++ b/security/apparmor/include/cred.h
--- a/security/apparmor/include/file.h
+++ b/security/apparmor/include/file.h
--- a/security/apparmor/include/lib.h
+++ b/security/apparmor/include/lib.h
--- a/security/apparmor/include/task.h
+++ b/security/apparmor/include/task.h
--- a/security/apparmor/lsm.c
+++ b/security/apparmor/lsm.c
--- a/security/apparmor/task.c
+++ b/security/apparmor/task.c
--- a/security/commoncap.c
+++ b/security/commoncap.c
--- a/security/loadpin/loadpin.c
+++ b/security/loadpin/loadpin.c
--- a/security/security.c
+++ b/security/security.c
--- a/security/selinux/Kconfig
+++ b/security/selinux/Kconfig
--- a/security/selinux/Makefile
+++ b/security/selinux/Makefile
--- a/security/selinux/exports.c
+++ b/security/selinux/exports.c
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
--- a/security/selinux/include/audit.h
+++ b/security/selinux/include/audit.h
--- a/security/selinux/include/objsec.h
+++ b/security/selinux/include/objsec.h
--- a/security/selinux/selinuxfs.c
+++ b/security/selinux/selinuxfs.c
--- a/security/selinux/ss/services.c
+++ b/security/selinux/ss/services.c
--- a/security/selinux/xfrm.c
+++ b/security/selinux/xfrm.c
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
--- a/security/smack/smack_access.c
+++ b/security/smack/smack_access.c
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
--- a/security/smack/smackfs.c
+++ b/security/smack/smackfs.c
--- a/security/tomoyo/common.h
+++ b/security/tomoyo/common.h
--- a/security/tomoyo/domain.c
+++ b/security/tomoyo/domain.c
--- a/security/tomoyo/securityfs_if.c
+++ b/security/tomoyo/securityfs_if.c
--- a/security/tomoyo/tomoyo.c
+++ b/security/tomoyo/tomoyo.c
--- a/security/yama/yama_lsm.c
+++ b/security/yama/yama_lsm.c