From 7d19bd80c0657f83ca668535ee2e2706e76136ce Mon Sep 17 00:00:00 2001 From: Thomas Graf Date: Tue, 23 Dec 2014 01:13:18 +0100 Subject: net: Reset secmark when scrubbing packet [ Upstream commit b8fb4e0648a2ab3734140342002f68fb0c7d1602 ] skb_scrub_packet() is called when a packet switches between a context such as between underlay and overlay, between namespaces, or between L3 subnets. While we already scrub the packet mark, connection tracking entry, and cached destination, the security mark/context is left intact. It seems wrong to inherit the security context of a packet when going from overlay to underlay or across forwarding paths. Signed-off-by: Thomas Graf Acked-by: Flavio Leitner Signed-off-by: David S. Miller Signed-off-by: Greg Kroah-Hartman --- net/core/skbuff.c | 1 + 1 file changed, 1 insertion(+) (limited to 'net') diff --git a/net/core/skbuff.c b/net/core/skbuff.c index baf6fc457df9..e2b1bba69882 100644 --- a/net/core/skbuff.c +++ b/net/core/skbuff.c @@ -3937,6 +3937,7 @@ void skb_scrub_packet(struct sk_buff *skb, bool xnet) skb->local_df = 0; skb_dst_drop(skb); skb->mark = 0; + skb_init_secmark(skb); secpath_reset(skb); nf_reset(skb); nf_reset_trace(skb); -- cgit v1.2.3