From 3ec30113264a7bcd389f51d1738e42da0f41bb5a Mon Sep 17 00:00:00 2001
From: Matthew Garrett <mjg59@google.com>
Date: Mon, 8 Jan 2018 13:36:19 -0800
Subject: security: Add a cred_getsecid hook

For IMA purposes, we want to be able to obtain the prepared secid in the
bprm structure before the credentials are committed. Add a cred_getsecid
hook that makes this possible.

Signed-off-by: Matthew Garrett <mjg59@google.com>
Acked-by: Paul Moore <paul@paul-moore.com>
Cc: Paul Moore <paul@paul-moore.com>
Cc: Stephen Smalley <sds@tycho.nsa.gov>
Cc: Casey Schaufler <casey@schaufler-ca.com>
Signed-off-by: Mimi Zohar <zohar@linux.vnet.ibm.com>
---
 security/security.c | 7 +++++++
 1 file changed, 7 insertions(+)

(limited to 'security/security.c')

diff --git a/security/security.c b/security/security.c
index 14c291910d25..957e8bee3554 100644
--- a/security/security.c
+++ b/security/security.c
@@ -1005,6 +1005,13 @@ void security_transfer_creds(struct cred *new, const struct cred *old)
 	call_void_hook(cred_transfer, new, old);
 }
 
+void security_cred_getsecid(const struct cred *c, u32 *secid)
+{
+	*secid = 0;
+	call_void_hook(cred_getsecid, c, secid);
+}
+EXPORT_SYMBOL(security_cred_getsecid);
+
 int security_kernel_act_as(struct cred *new, u32 secid)
 {
 	return call_int_hook(kernel_act_as, 0, new, secid);
-- 
cgit