ext4: Free resources in some error path in ext4_fill_super

Some of the error path in ext4_fill_super don't release the
resouces properly. So this patch just try to release them
in the right way.

Signed-off-by: Tao Ma <boyu.mt@taobao.com>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 07f3de3..db2cd3f 100644 (file)
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3785,22 +3785,19 @@ no_journal:
        if (err) {
                ext4_msg(sb, KERN_ERR, "failed to initialize mballoc (%d)",
                         err);
-               goto failed_mount4;
+               goto failed_mount5;
        }
 
        err = ext4_register_li_request(sb, first_not_zeroed);
        if (err)
-               goto failed_mount4;
+               goto failed_mount6;
 
        sbi->s_kobj.kset = ext4_kset;
        init_completion(&sbi->s_kobj_unregister);
        err = kobject_init_and_add(&sbi->s_kobj, &ext4_ktype, NULL,
                                   "%s", sb->s_id);
-       if (err) {
-               ext4_mb_release(sb);
-               ext4_ext_release(sb);
-               goto failed_mount4;
-       };
+       if (err)
+               goto failed_mount7;
 
        EXT4_SB(sb)->s_mount_state |= EXT4_ORPHAN_FS;
        ext4_orphan_cleanup(sb, es);
@@ -3834,13 +3831,19 @@ cantfind_ext4:
                ext4_msg(sb, KERN_ERR, "VFS: Can't find ext4 filesystem");
        goto failed_mount;
 
+failed_mount7:
+       ext4_unregister_li_request(sb);
+failed_mount6:
+       ext4_ext_release(sb);
+failed_mount5:
+       ext4_mb_release(sb);
+       ext4_release_system_zone(sb);
 failed_mount4:
        iput(root);
        sb->s_root = NULL;
        ext4_msg(sb, KERN_ERR, "mount failed");
        destroy_workqueue(EXT4_SB(sb)->dio_unwritten_wq);
 failed_mount_wq:
-       ext4_release_system_zone(sb);
        if (sbi->s_journal) {
                jbd2_journal_destroy(sbi->s_journal);
                sbi->s_journal = NULL;