xenbus_xs.c: fix a use-after-free

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

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Acked-by: Jeremy Fitzhardinge <jeremy@goop.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/drivers/xen/xenbus/xenbus_xs.c b/drivers/xen/xenbus/xenbus_xs.c
index 9e943fb..227d53b 100644 (file)
--- a/drivers/xen/xenbus/xenbus_xs.c
+++ b/drivers/xen/xenbus/xenbus_xs.c
@@ -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;
                }