From: Seung-Woo Kim <sw0312.kim@samsung.com>
To: linux-security-module@vger.kernel.org, linux-kernel@vger.kernel.org,
        james.l.morris@oracle.com, serge@hallyn.com, casey@schaufler-ca.com
Cc: sds@tycho.nsa.gov, sw0312.kim@samsung.com, sumit.semwal@linaro.org,
        linaro-mm-sig@lists.linaro.org, jy0922.shim@samsung.com
Subject: [RESEND PATCH] Smack: ignore private inode for smack_file_receive
Date: Fri, 17 Apr 2015 15:25:04 +0900
Message-id: <1429251904-1078-1-git-send-email-sw0312.kim@samsung.com>
DLP-Filter: Pass
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1262
Lines: 35

The dmabuf fd can be shared between processes via unix domain
socket. The file of dmabuf fd is came from anon_inode. The inode
has no set and get xattr operations, so it can not be shared
between processes with smack. This patch fixes just to ignore
private inode including anon_inode for smack_file_receive.

Signed-off-by: Seung-Woo Kim <sw0312.kim@samsung.com>
---
I think there was some issue sending my previous mail, so I resend patch again.
---
 security/smack/smack_lsm.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/security/smack/smack_lsm.c b/security/smack/smack_lsm.c
index 69fdc38..d1bb411 100644
--- a/security/smack/smack_lsm.c
+++ b/security/smack/smack_lsm.c
@@ -1673,6 +1673,9 @@ static int smack_file_receive(struct file *file)
 	struct smk_audit_info ad;
 	struct inode *inode = file_inode(file);
 
+	if (unlikely(IS_PRIVATE(inode)))
+		return 0;
+
 	smk_ad_init(&ad, __func__, LSM_AUDIT_DATA_PATH);
 	smk_ad_setfield_u_fs_path(&ad, file->f_path);
 	/*
-- 
1.7.4.1

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