linux-kernel - [RFC][PATCH 5/7] smack: import the security label in smack_secctx_to

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Date:	Wed, 27 Apr 2011 14:34:13 +0200
From:	Roberto Sassu <roberto.sassu@...ito.it>
To:	linux-security-module@...r.kernel.org
Cc:	linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org,
	dhowells@...hat.com, jmorris@...ei.org, zohar@...ux.vnet.ibm.com,
	safford@...son.ibm.com, tyhicks@...ux.vnet.ibm.com,
	kirkland@...onical.com, ecryptfs-devel@...ts.launchpad.net,
	casey@...aufler-ca.com, eparis@...hat.com, sds@...ho.nsa.gov,
	selinux@...ho.nsa.gov, viro@...iv.linux.org.uk,
	Roberto Sassu <roberto.sassu@...ito.it>
Subject: [RFC][PATCH 5/7] smack: import the security label in smack_secctx_to_secid()

The security label passed as argument in smack_secctx_to_secid() must be
first imported in the 'smack_known_list' list before finding the security
identifier associated to it. This allows the function
set_security_override_from_ctx() to be performed successfully even if the
label is not yet present in the smack list.

Signed-off-by: Roberto Sassu <roberto.sassu@...ito.it>
---
 security/smack/smack_lsm.c |    8 +++++++-
 1 files changed, 7 insertions(+), 1 deletions(-)

diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 0e7ed31..6612ba1 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -3346,7 +3346,13 @@ static int smack_secid_to_secctx(u32 secid, char **secdata, u32 *seclen)
  */
 static int smack_secctx_to_secid(const char *secdata, u32 seclen, u32 *secid)
 {
-	*secid = smack_to_secid(secdata);
+	char *smack;
+
+	smack = smk_import(secdata, seclen);
+	if (smack == NULL)
+		return -EINVAL;
+
+	*secid = smack_to_secid(smack);
 	return 0;
 }
 
-- 
1.7.4.4


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