Subject: dm: fix memory leak in dm_create_persistent() when starting metadata update thread fails
From: Jesper Juhl <jesper.juhl@gmail.com>
   
If, in dm_create_persistent(), the call to create_singlethread_workqueue()
fails then we'll return without freeing the memory allocated to 'ps', thus
leaking sizeof(struct pstore) bytes.  This patch fixes the leak.
   
Signed-off-by: Jesper Juhl <jesper.juhl@gmail.com
Acked-by: Alasdair G Kergon <agk@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

---
 drivers/md/dm-exception-store.c |    1 +
 1 files changed, 1 insertion(+)

Index: linux-2.6.22/drivers/md/dm-exception-store.c
===================================================================
--- linux-2.6.22.orig/drivers/md/dm-exception-store.c	2007-07-17 16:26:09.000000000 +0100
+++ linux-2.6.22/drivers/md/dm-exception-store.c	2007-07-17 16:30:01.000000000 +0100
@@ -623,6 +623,7 @@ int dm_create_persistent(struct exceptio
 
 	ps->metadata_wq = create_singlethread_workqueue("ksnaphd");
 	if (!ps->metadata_wq) {
+		kfree(ps);
 		DMERR("couldn't start header metadata update thread");
 		return -ENOMEM;
 	}