JBD/JBD2: free j_wbuf if journal init fails.

If journal init fails, we need to free j_wbuf.

Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Jan Kara <jack@suse.cz>
Signed-off-by: Tao Ma <tao.ma@oracle.com>
Signed-off-by: Jan Kara <jack@suse.cz>
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index b0ab521..fed85388 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -913,6 +913,7 @@
 
 	return journal;
 out_err:
+	kfree(journal->j_wbuf);
 	jbd2_stats_proc_exit(journal);
 	kfree(journal);
 	return NULL;
@@ -986,6 +987,7 @@
 
 	return journal;
 out_err:
+	kfree(journal->j_wbuf);
 	jbd2_stats_proc_exit(journal);
 	kfree(journal);
 	return NULL;