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authorStephen Smalley <sds@tycho.nsa.gov>2016-11-18 10:23:09 -0500
committerPaul Moore <paul@paul-moore.com>2016-11-21 15:37:24 -0500
commit3322d0d64f4e942862a152f6f11137a1f5eac2e9 (patch)
treec86bdc1084436be2cb25afe9f382764c091db6ee /security
parentea49d10eee5a220b717dbf2ee429c9e3d59c978c (diff)
downloadlinux-stericsson-3322d0d64f4e942862a152f6f11137a1f5eac2e9.tar.gz
selinux: keep SELinux in sync with new capability definitions
When a new capability is defined, SELinux needs to be updated. Trigger a build error if a new capability is defined without corresponding update to security/selinux/include/classmap.h's COMMON_CAP2_PERMS. This is similar to BUILD_BUG_ON() guards in the SELinux nlmsgtab code to ensure that SELinux tracks new netlink message types as needed. Note that there is already a similar build guard in security/selinux/hooks.c to detect when more than 64 capabilities are defined, since that will require adding a third capability class to SELinux. A nicer way to do this would be to extend scripts/selinux/genheaders or a similar tool to auto-generate the necessary definitions and code for SELinux capability checking from include/uapi/linux/capability.h. AppArmor does something similar in its Makefile, although it only needs to generate a single table of names. That is left as future work. Signed-off-by: Stephen Smalley <sds@tycho.nsa.gov> [PM: reformat the description to keep checkpatch.pl happy] Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'security')
-rw-r--r--security/selinux/include/classmap.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/security/selinux/include/classmap.h b/security/selinux/include/classmap.h
index 1f1f4b2f6018..e2d4ad3a4b4c 100644
--- a/security/selinux/include/classmap.h
+++ b/security/selinux/include/classmap.h
@@ -24,6 +24,10 @@
#define COMMON_CAP2_PERMS "mac_override", "mac_admin", "syslog", \
"wake_alarm", "block_suspend", "audit_read"
+#if CAP_LAST_CAP > CAP_AUDIT_READ
+#error New capability defined, please update COMMON_CAP2_PERMS.
+#endif
+
/*
* Note: The name for any socket class should be suffixed by "socket",
* and doesn't contain more than one substr of "socket".