From: Steffen Klassert <steffen.klassert@secunet.com>
Date: Mon, 4 Sep 2017 08:59:55 +0000 (+0200)
Subject: xfrm: Fix negative device refcount on offload failure.
X-Git-Tag: v4.14-rc5~40^2~7^2~2
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=67a63387b1417b5954eedb15f638f1f0bee3da49;p=platform%2Fkernel%2Flinux-rpi3.git

xfrm: Fix negative device refcount on offload failure.

Reset the offload device at the xfrm_state if the device was
not able to offload the state. Otherwise we drop the device
refcount twice.

Fixes: d77e38e612a0 ("xfrm: Add an IPsec hardware offloading API")
Reported-by: Shannon Nelson <shannon.nelson@oracle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>
---

diff --git a/net/xfrm/xfrm_device.c b/net/xfrm/xfrm_device.c
index acf0010..30e5746 100644
--- a/net/xfrm/xfrm_device.c
+++ b/net/xfrm/xfrm_device.c
@@ -91,6 +91,7 @@ int xfrm_dev_state_add(struct net *net, struct xfrm_state *x,
 	}
 
 	if (!dev->xfrmdev_ops || !dev->xfrmdev_ops->xdo_dev_state_add) {
+		xso->dev = NULL;
 		dev_put(dev);
 		return 0;
 	}