From cf81f89d9a85b1825d8c8cf1f8f0e2c98cc72823 Mon Sep 17 00:00:00 2001
From: Michael Halcrow <mhalcrow@us.ibm.com>
Date: Tue, 16 Oct 2007 01:28:07 -0700
Subject: ecryptfs: fix error handling

The error paths and the module exit code need work. sysfs
unregistration is not the right place to tear down the crypto
subsystem, and the code to undo subsystem initializations on various
error paths is unnecessarily duplicated. This patch addresses those
issues.

Signed-off-by: Michael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 00686f1..4954595 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -799,13 +799,6 @@ out:
 
 static void do_sysfs_unregistration(void)
 {
-	int rc;
-
-	rc = ecryptfs_destroy_crypto();
-	if (rc) {
-		printk(KERN_ERR "Failure whilst attempting to destroy crypto; "
-		       "rc = [%d]\n", rc);
-	}
 	sysfs_remove_file(&ecryptfs_subsys.kobj,
 			  &sysfs_attr_version.attr);
 	sysfs_remove_file(&ecryptfs_subsys.kobj,
@@ -836,43 +829,49 @@ static int __init ecryptfs_init(void)
 	rc = register_filesystem(&ecryptfs_fs_type);
 	if (rc) {
 		printk(KERN_ERR "Failed to register filesystem\n");
-		ecryptfs_free_kmem_caches();
-		goto out;
+		goto out_free_kmem_caches;
 	}
 	kobj_set_kset_s(&ecryptfs_subsys, fs_subsys);
 	rc = do_sysfs_registration();
 	if (rc) {
 		printk(KERN_ERR "sysfs registration failed\n");
-		unregister_filesystem(&ecryptfs_fs_type);
-		ecryptfs_free_kmem_caches();
-		goto out;
+		goto out_unregister_filesystem;
 	}
 	rc = ecryptfs_init_messaging(ecryptfs_transport);
 	if (rc) {
 		ecryptfs_printk(KERN_ERR, "Failure occured while attempting to "
 				"initialize the eCryptfs netlink socket\n");
-		do_sysfs_unregistration();
-		unregister_filesystem(&ecryptfs_fs_type);
-		ecryptfs_free_kmem_caches();
-		goto out;
+		goto out_do_sysfs_unregistration;
 	}
 	rc = ecryptfs_init_crypto();
 	if (rc) {
 		printk(KERN_ERR "Failure whilst attempting to init crypto; "
 		       "rc = [%d]\n", rc);
-		do_sysfs_unregistration();
-		unregister_filesystem(&ecryptfs_fs_type);
-		ecryptfs_free_kmem_caches();
-		goto out;
+		goto out_release_messaging;
 	}
+	goto out;
+out_release_messaging:
+	ecryptfs_release_messaging(ecryptfs_transport);
+out_do_sysfs_unregistration:
+	do_sysfs_unregistration();
+out_unregister_filesystem:
+	unregister_filesystem(&ecryptfs_fs_type);
+out_free_kmem_caches:
+	ecryptfs_free_kmem_caches();
 out:
 	return rc;
 }
 
 static void __exit ecryptfs_exit(void)
 {
-	do_sysfs_unregistration();
+	int rc;
+
+	rc = ecryptfs_destroy_crypto();
+	if (rc)
+		printk(KERN_ERR "Failure whilst attempting to destroy crypto; "
+		       "rc = [%d]\n", rc);
 	ecryptfs_release_messaging(ecryptfs_transport);
+	do_sysfs_unregistration();
 	unregister_filesystem(&ecryptfs_fs_type);
 	ecryptfs_free_kmem_caches();
 }
-- 
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