xfrm6: release dev before returning error

[ Upstream commit 84c4a9dfbf430861e7588d95ae3ff61535dca351 ]

We forget to call dev_put() on error path in xfrm6_fill_dst(),
its caller doesn't handle this.

Signed-off-by: Cong Wang <amwang@redhat.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Steffen Klassert <steffen.klassert@secunet.com>
Cc: David S. Miller <davem@davemloft.net>
Signed-off-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/net/ipv6/xfrm6_policy.c b/net/ipv6/xfrm6_policy.c
index d879f7efbd10b676be5887ab6460cfb8bee881d9..db78e7d874d7d92113b177130c04ca00da64c450 100644 (file)
--- a/net/ipv6/xfrm6_policy.c
+++ b/net/ipv6/xfrm6_policy.c
@@ -96,8 +96,10 @@ static int xfrm6_fill_dst(struct xfrm_dst *xdst, struct net_device *dev,
        dev_hold(dev);
 
        xdst->u.rt6.rt6i_idev = in6_dev_get(dev);
-       if (!xdst->u.rt6.rt6i_idev)
+       if (!xdst->u.rt6.rt6i_idev) {
+               dev_put(dev);
                return -ENODEV;
+       }
 
        xdst->u.rt6.rt6i_peer = rt->rt6i_peer;
        if (rt->rt6i_peer)