netdev - [PATCH 2/4] xfrm: Fix negative device refcount on offload failure.

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Message-ID: <1507533399-29399-3-git-send-email-steffen.klassert@secunet.com>
Date:   Mon, 9 Oct 2017 09:16:37 +0200
From:   Steffen Klassert <steffen.klassert@...unet.com>
To:     David Miller <davem@...emloft.net>
CC:     Herbert Xu <herbert@...dor.apana.org.au>,
        Steffen Klassert <steffen.klassert@...unet.com>,
        <netdev@...r.kernel.org>
Subject: [PATCH 2/4] 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@...cle.com>
Signed-off-by: Steffen Klassert <steffen.klassert@...unet.com>
---
 net/xfrm/xfrm_device.c | 1 +
 1 file changed, 1 insertion(+)

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;
 	}
-- 
2.7.4