linux-kernel - [PATCH 4.17 093/324] Smack: Mark inode instant in smack_task_to

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Message-Id: <20180823075000.500067280@linuxfoundation.org>
Date:   Thu, 23 Aug 2018 09:52:39 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Casey Schaufler <casey@...aufler-ca.com>,
        James Morris <james.morris@...rosoft.com>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.17 093/324] Smack: Mark inode instant in smack_task_to_inode

4.17-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Casey Schaufler <casey@...aufler-ca.com>

[ Upstream commit 7b4e88434c4e7982fb053c49657e1c8bbb8692d9 ]

Smack: Mark inode instant in smack_task_to_inode

/proc clean-up in commit 1bbc55131e59bd099fdc568d3aa0b42634dbd188
resulted in smack_task_to_inode() being called before smack_d_instantiate.
This resulted in the smk_inode value being ignored, even while present
for files in /proc/self. Marking the inode as instant here fixes that.

Signed-off-by: Casey Schaufler <casey@...aufler-ca.com>
Signed-off-by: James Morris <james.morris@...rosoft.com>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 security/smack/smack_lsm.c |    1 +
 1 file changed, 1 insertion(+)

--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -2296,6 +2296,7 @@ static void smack_task_to_inode(struct t
 	struct smack_known *skp = smk_of_task_struct(p);
 
 	isp->smk_inode = skp;
+	isp->smk_flags |= SMK_INODE_INSTANT;
 }
 
 /*