Revert "SELinux: allow fstype unknown to policy to use xattrs if present"

This reverts commit 811f3799279e567aa354c649ce22688d949ac7a9.

From Eric Paris:

"Please drop this patch for now.  It deadlocks on ntfs-3g.  I need to
rework it to handle fuse filesystems better.  (casey was right)"

1 files changed, 5 insertions, 17 deletions

diff --git a/security/selinux/hooks.c b/security/selinux/hooks.c
index 91200fe..63f131f 100644
--- a/security/selinux/hooks.c
+++ b/security/selinux/hooks.c
@@ -555,15 +555,13 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 	struct task_security_struct *tsec = current->security;
 	struct superblock_security_struct *sbsec = sb->s_security;
 	const char *name = sb->s_type->name;
-	struct dentry *root = sb->s_root;
-	struct inode *root_inode = root->d_inode;
-	struct inode_security_struct *root_isec = root_inode->i_security;
+	struct inode *inode = sbsec->sb->s_root->d_inode;
+	struct inode_security_struct *root_isec = inode->i_security;
 	u32 fscontext_sid = 0, context_sid = 0, rootcontext_sid = 0;
 	u32 defcontext_sid = 0;
 	char **mount_options = opts->mnt_opts;
 	int *flags = opts->mnt_opts_flags;
 	int num_opts = opts->num_mnt_opts;
-	bool can_xattr = false;
 
 	mutex_lock(&sbsec->lock);
 
@@ -667,24 +665,14 @@ static int selinux_set_mnt_opts(struct super_block *sb,
 		goto out;
 	}
 
-	if (strcmp(name, "proc") == 0)
+	if (strcmp(sb->s_type->name, "proc") == 0)
 		sbsec->proc = 1;
 
-	/*
-	 * test if the fs supports xattrs, fs_use might make use of this if the
-	 * fs has no definition in policy.
-	 */
-	if (root_inode->i_op->getxattr) {
-		rc = root_inode->i_op->getxattr(root, XATTR_NAME_SELINUX, NULL, 0);
-		if (rc >= 0 || rc == -ENODATA)
-			can_xattr = true;
-	}
-
 	/* Determine the labeling behavior to use for this filesystem type. */
-	rc = security_fs_use(name, &sbsec->behavior, &sbsec->sid, can_xattr);
+	rc = security_fs_use(sb->s_type->name, &sbsec->behavior, &sbsec->sid);
 	if (rc) {
 		printk(KERN_WARNING "%s: security_fs_use(%s) returned %d\n",
-		       __func__, name, rc);
+		       __func__, sb->s_type->name, rc);
 		goto out;
 	}