Smack: ignore private inode for smack_file_receive
authorSeung-Woo Kim <sw0312.kim@samsung.com>
Fri, 17 Apr 2015 06:25:04 +0000 (15:25 +0900)
committerCasey Schaufler <casey@schaufler-ca.com>
Fri, 15 May 2015 15:35:50 +0000 (08:35 -0700)
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>
security/smack/smack_lsm.c

index 5eae42c8d0d5dcf2a05601f33b794f597cc4594b..f09b8c7cf1e78e93b5b9e31df0185cd562973c8b 100644 (file)
@@ -1658,6 +1658,9 @@ 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);
        /*