linux-kernel - [PATCH] Smack: replace capable() with ns

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Message-id: <1437737174-29451-1-git-send-email-sungbae.yoo@samsung.com>
Date:	Fri, 24 Jul 2015 20:26:14 +0900
From:	Sungbae Yoo <sungbae.yoo@...sung.com>
To:	Casey Schaufler <casey@...aufler-ca.com>
Cc:	James Morris <james.l.morris@...cle.com>,
	"Serge E. Hallyn" <serge@...lyn.com>,
	linux-security-module@...r.kernel.org,
	linux-kernel@...r.kernel.org, Sungbae Yoo <sungbae.yoo@...sung.com>
Subject: [PATCH] Smack: replace capable() with ns_capable()

If current task has capabilities, Smack operations (eg. Changing own smack
label) should be available even inside of namespace.

Signed-off-by: Sungbae Yoo <sungbae.yoo@...sung.com>

diff --git a/security/smack/smack_access.c b/security/smack/smack_access.c
index 00f6b38..f6b2c35 100644
--- a/security/smack/smack_access.c
+++ b/security/smack/smack_access.c
@@ -639,7 +639,7 @@ int smack_privileged(int cap)
 	struct smack_known *skp = smk_of_current();
 	struct smack_onlycap *sop;
 
-	if (!capable(cap))
+	if (!ns_capable(current_user_ns(), cap))
 		return 0;
 
 	rcu_read_lock();
diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index a143328..7fdc3dd 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -403,7 +403,8 @@ static int smk_ptrace_rule_check(struct task_struct *tracer,
 			rc = 0;
 		else if (smack_ptrace_rule == SMACK_PTRACE_DRACONIAN)
 			rc = -EACCES;
-		else if (capable(CAP_SYS_PTRACE))
+		else if (ns_capable(__task_cred(tracer)->user_ns,
+				    CAP_SYS_PTRACE))
 			rc = 0;
 		else
 			rc = -EACCES;
-- 
1.9.1

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