Commit a75de1b3 authored by Ryusuke Konishi's avatar Ryusuke Konishi Committed by Linus Torvalds

eCryptfs: fix error handling in ecryptfs_init

ecryptfs_init() exits without doing any cleanup jobs if
ecryptfs_init_messaging() fails.  In that case, eCryptfs leaves
sysfs entries, leaks memory, and causes an invalid page fault.
This patch fixes the problem.
Signed-off-by: default avatarRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>
Acked-by: default avatarMichael Halcrow <mhalcrow@us.ibm.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent b9a06207
......@@ -813,6 +813,15 @@ static int do_sysfs_registration(void)
return rc;
}
static void do_sysfs_unregistration(void)
{
sysfs_remove_file(&ecryptfs_subsys.kobj,
&sysfs_attr_version.attr);
sysfs_remove_file(&ecryptfs_subsys.kobj,
&sysfs_attr_version_str.attr);
subsystem_unregister(&ecryptfs_subsys);
}
static int __init ecryptfs_init(void)
{
int rc;
......@@ -851,6 +860,9 @@ static int __init ecryptfs_init(void)
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();
}
out:
return rc;
......@@ -858,11 +870,7 @@ static int __init ecryptfs_init(void)
static void __exit ecryptfs_exit(void)
{
sysfs_remove_file(&ecryptfs_subsys.kobj,
&sysfs_attr_version.attr);
sysfs_remove_file(&ecryptfs_subsys.kobj,
&sysfs_attr_version_str.attr);
subsystem_unregister(&ecryptfs_subsys);
do_sysfs_unregistration();
ecryptfs_release_messaging(ecryptfs_transport);
unregister_filesystem(&ecryptfs_fs_type);
ecryptfs_free_kmem_caches();
......
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