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authorCasey Schaufler <casey@schaufler-ca.com>2012-06-05 15:28:30 -0700
committerCasey Schaufler <casey@schaufler-ca.com>2012-07-13 15:49:23 -0700
commit1880eff77e7a7cb46c68fae7cfa33f72f0a6e70e (patch)
treefc4b9a2ca7c643a30cbe2260886fdbd969bf2b50 /security/smack/smack.h
parenteb982cb4cf6405b97ea1f9e1d10864981f269d46 (diff)
downloadlinux-1880eff77e7a7cb46c68fae7cfa33f72f0a6e70e.tar.gz
Smack: onlycap limits on CAP_MAC_ADMIN
Smack is integrated with the POSIX capabilities scheme, using the capabilities CAP_MAC_OVERRIDE and CAP_MAC_ADMIN to determine if a process is allowed to ignore Smack checks or change Smack related data respectively. Smack provides an additional restriction that if an onlycap value is set by writing to /smack/onlycap only tasks with that Smack label are allowed to use CAP_MAC_OVERRIDE. This change adds CAP_MAC_ADMIN as a capability that is affected by the onlycap mechanism. Targeted for git://git.gitorious.org/smack-next/kernel.git Signed-off-by: Casey Schaufler <casey@schaufler-ca.com>
Diffstat (limited to 'security/smack/smack.h')
-rw-r--r--security/smack/smack.h13
1 files changed, 13 insertions, 0 deletions
diff --git a/security/smack/smack.h b/security/smack/smack.h
index 76feb31eb823..99b36124f712 100644
--- a/security/smack/smack.h
+++ b/security/smack/smack.h
@@ -283,6 +283,19 @@ static inline char *smk_of_current(void)
}
/*
+ * Is the task privileged and allowed to be privileged
+ * by the onlycap rule.
+ */
+static inline int smack_privileged(int cap)
+{
+ if (!capable(cap))
+ return 0;
+ if (smack_onlycap == NULL || smack_onlycap == smk_of_current())
+ return 1;
+ return 0;
+}
+
+/*
* logging functions
*/
#define SMACK_AUDIT_DENIED 0x1