netdev - [BUG,PATCH] XFRM: copy_to_user_kmaddress() reports local address twice

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Date:	Mon, 03 Nov 2008 10:23:27 +0100
From:	arno@...isbad.org (Arnaud Ebalard)
To:	David Miller <davem@...emloft.net>
Cc:	netdev@...r.kernel.org,
	Andreas Steffen <andreas.steffen@...ongswan.org>,
	Martin Willi <martin@...ongswan.org>
Subject: [BUG,PATCH] XFRM: copy_to_user_kmaddress() reports local address twice

Hi David,

Stupid bug, sorry for that. Attached patch is against current net-2.6. 

Cheers,

a+

While adding support for MIGRATE/KMADDRESS in strongSwan (as specified
in draft-ebalard-mext-pfkey-enhanced-migrate-00), Andreas Steffen
noticed that XFRMA_KMADDRESS attribute passed to userland contains the
local address twice (remote provides local address instead of remote
one).

This bug in copy_to_user_kmaddress() affects only key managers that use
native XFRM interface (key managers that use PF_KEY are not affected).

For the record, the bug was in the initial changeset I posted which
added support for KMADDRESS (13c1d18931ebb5cf407cb348ef2cd6284d68902d).

Signed-off-by: Arnaud Ebalard <arno@...isbad.org>
Reported-by: Andreas Steffen <andreas.steffen@...ongswan.org>
---
 net/xfrm/xfrm_user.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/net/xfrm/xfrm_user.c b/net/xfrm/xfrm_user.c
index 4a8a1ab..a278a6f 100644
--- a/net/xfrm/xfrm_user.c
+++ b/net/xfrm/xfrm_user.c
@@ -1816,7 +1816,7 @@ static int copy_to_user_kmaddress(struct xfrm_kmaddress *k, struct sk_buff *skb)
 	uk.family = k->family;
 	uk.reserved = k->reserved;
 	memcpy(&uk.local, &k->local, sizeof(uk.local));
-	memcpy(&uk.remote, &k->local, sizeof(uk.remote));
+	memcpy(&uk.remote, &k->remote, sizeof(uk.remote));

 	return nla_put(skb, XFRMA_KMADDRESS, sizeof(uk), &uk);
 }
-- 
1.5.6.3
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