[RFC][PATCH 5/7] smack: import the security label in smack_secctx_to_secid()

[Roberto Sassu]

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@xxxxxxxxx>
---
 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

Attachment: smime.p7s
Description: S/MIME cryptographic signature