linux-kernel - [PATCH 4.4 27/72] selinux: Remove redundant check for unknown labeling behavior

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Message-Id: <20180406084307.431462913@linuxfoundation.org>
Date:   Fri,  6 Apr 2018 15:23:28 +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, Matthias Kaehlcke <mka@...omium.org>,
        Stephen Smalley <sds@...ho.nsa.gov>,
        Paul Moore <paul@...l-moore.com>,
        Nathan Chancellor <natechancellor@...il.com>
Subject: [PATCH 4.4 27/72] selinux: Remove redundant check for unknown labeling behavior

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

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

From: Matthias Kaehlcke <mka@...omium.org>

commit 270e8573145a26de924e2dc644596332d400445b upstream.

The check is already performed in ocontext_read() when the policy is
loaded. Removing the array also fixes the following warning when
building with clang:

security/selinux/hooks.c:338:20: error: variable 'labeling_behaviors'
    is not needed and will not be emitted
    [-Werror,-Wunneeded-internal-declaration]

Signed-off-by: Matthias Kaehlcke <mka@...omium.org>
Acked-by: Stephen Smalley <sds@...ho.nsa.gov>
Signed-off-by: Paul Moore <paul@...l-moore.com>
[natechancellor: inode_doinit_with_dentry still present]
Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 security/selinux/hooks.c |   16 ----------------
 1 file changed, 16 deletions(-)

--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -333,18 +333,6 @@ static void superblock_free_security(str
 	kfree(sbsec);
 }
 
-/* The file system's label must be initialized prior to use. */
-
-static const char *labeling_behaviors[7] = {
-	"uses xattr",
-	"uses transition SIDs",
-	"uses task SIDs",
-	"uses genfs_contexts",
-	"not configured for labeling",
-	"uses mountpoint labeling",
-	"uses native labeling",
-};
-
 static int inode_doinit_with_dentry(struct inode *inode, struct dentry *opt_dentry);
 
 static inline int inode_doinit(struct inode *inode)
@@ -456,10 +444,6 @@ static int sb_finish_set_opts(struct sup
 		}
 	}
 
-	if (sbsec->behavior > ARRAY_SIZE(labeling_behaviors))
-		printk(KERN_ERR "SELinux: initialized (dev %s, type %s), unknown behavior\n",
-		       sb->s_id, sb->s_type->name);
-
 	sbsec->flags |= SE_SBINITIALIZED;
 	if (selinux_is_sblabel_mnt(sb))
 		sbsec->flags |= SBLABEL_MNT;