[2.6.23 patch] xenbus_xs.c: fix a use-after-free

[Adrian Bunk <bunk@stusta.de>]

This patch fixes an obvious use-after-free spotted by the Coverity checker.

Signed-off-by: Adrian Bunk <bunk@stusta.de>

---
--- linux-2.6.22-rc6-mm1/drivers/xen/xenbus/xenbus_xs.c.old	2007-07-23 03:04:20.000000000 +0200
+++ linux-2.6.22-rc6-mm1/drivers/xen/xenbus/xenbus_xs.c	2007-07-23 03:04:42.000000000 +0200
@@ -782,8 +782,8 @@ static int process_msg(void)
 		msg->u.watch.vec = split(body, msg->hdr.len,
 					 &msg->u.watch.vec_size);
 		if (IS_ERR(msg->u.watch.vec)) {
-			kfree(msg);
 			err = PTR_ERR(msg->u.watch.vec);
+			kfree(msg);
 			goto out;
 		}
 

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