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xfrm_user: verify policy direction at XFRM_MSG_POLEXPIRE handler 

Add missing check for policy direction verification. This is
especially important since without this xfrm_user may end up
deleting per-socket policy which is not allowed.

Signed-off-by: Timo Teras <timo.teras@iki.fi>
Acked-by: Herbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Timo Teräs 2010-03-31 00:17:04 +00:00 committed by David S. Miller
parent 34996cb91d
commit c8bf4d04f9
1 changed files with 4 additions and 0 deletions
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4
net/xfrm/xfrm_user.c
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@ -1741,6 +1741,10 @@ static int xfrm_add_pol_expire(struct sk_buff *skb, struct nlmsghdr *nlh,
if (err)
return err;
err = verify_policy_dir(p->dir);
if (err)
return err;
if (p->index)
xp = xfrm_policy_byid(net, mark, type, p->dir, p->index, 0, &err);
else {