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xfrm: release neighbor upon dst destruction

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Neighbor is cloned in xfrm6_fill_dst but seems to never be released.
Neighbor entry should be released when XFRM6 dst entry is destroyed
in xfrm6_dst_destroy, otherwise references may be kept forever on
the device pointed by the neighbor entry.

I may not have understood all the subtleties of XFRM & dst so I would
be happy to receive comments on this patch.

Signed-off-by: Romain Kuntz <r.kuntz@ipflavors.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Romain KUNTZ 2013-02-18 02:36:24 +00:00 committed by David S. Miller
parent dca9ab9274
commit 18cf0d0784
1 changed files with 2 additions and 0 deletions
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2
net/ipv6/xfrm6_policy.c
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@ -236,6 +236,8 @@ static void xfrm6_dst_destroy(struct dst_entry *dst)
{
struct xfrm_dst *xdst = (struct xfrm_dst *)dst;
if (likely(xdst->u.rt6.n))
neigh_release(xdst->u.rt6.n);
if (likely(xdst->u.rt6.rt6i_idev))
in6_dev_put(xdst->u.rt6.rt6i_idev);
dst_destroy_metrics_generic(dst);