linux-kernel - [PATCH v12 5/9] LSM: Multiple concurrent LSMs

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Date:	Mon, 07 Jan 2013 18:09:26 -0800
From:	Casey Schaufler <casey@...aufler-ca.com>
To:	James Morris <jmorris@...ei.org>
CC:	Casey Schaufler <casey@...aufler-ca.com>,
	LSM <linux-security-module@...r.kernel.org>,
	LKLM <linux-kernel@...r.kernel.org>,
	SE Linux <selinux@...ho.nsa.gov>,
	John Johansen <john.johansen@...onical.com>,
	Eric Paris <eparis@...hat.com>,
	Tetsuo Handa <penguin-kernel@...ove.sakura.ne.jp>,
	Kees Cook <keescook@...omium.org>
Subject: [PATCH v12 5/9] LSM: Multiple concurrent LSMs

Subject: [PATCH v12 5/9] LSM: Multiple concurrent LSMs

Change the infrastructure for Linux Security Modules (LSM)s
from a single vector of hook handlers to a list based method
for handling multiple concurrent modules. 

Add per-LSM interfaces in /proc/*/attr as it is infeasible
to share them when more than one LSM is active.

Signed-off-by: Casey Schaufler <casey@...aufler-ca.com>

---
 fs/proc/base.c |   28 ++++++++++++++++++++++------
 1 file changed, 22 insertions(+), 6 deletions(-)

diff --git a/fs/proc/base.c b/fs/proc/base.c
index 9b43ff77..458422b 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -2216,12 +2216,28 @@ static const struct file_operations proc_pid_attr_operations = {
 };
 
 static const struct pid_entry attr_dir_stuff[] = {
-	REG("current",    S_IRUGO|S_IWUGO, proc_pid_attr_operations),
-	REG("prev",       S_IRUGO,	   proc_pid_attr_operations),
-	REG("exec",       S_IRUGO|S_IWUGO, proc_pid_attr_operations),
-	REG("fscreate",   S_IRUGO|S_IWUGO, proc_pid_attr_operations),
-	REG("keycreate",  S_IRUGO|S_IWUGO, proc_pid_attr_operations),
-	REG("sockcreate", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+	REG("current",            S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+	REG("prev",               S_IRUGO,	   proc_pid_attr_operations),
+	REG("exec",               S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+	REG("fscreate",           S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+	REG("keycreate",          S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+	REG("sockcreate",         S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+#ifdef CONFIG_SECURITY_SELINUX
+	REG("selinux.current",    S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+	REG("selinux.prev",       S_IRUGO,	   proc_pid_attr_operations),
+	REG("selinux.exec",       S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+	REG("selinux.fscreate",   S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+	REG("selinux.keycreate",  S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+	REG("selinux.sockcreate", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+#endif
+#ifdef CONFIG_SECURITY_SMACK
+	REG("smack.current",      S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+#endif
+#ifdef CONFIG_SECURITY_APPARMOR
+	REG("apparmor.current",   S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+	REG("apparmor.prev",      S_IRUGO,	   proc_pid_attr_operations),
+	REG("apparmor.exec",      S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+#endif
 };
 
 static int proc_attr_dir_readdir(struct file * filp,

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