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Commit b8fb4e06 authored by Thomas Graf's avatar Thomas Graf Committed by David S. Miller
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net: Reset secmark when scrubbing packet 



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: default avatarThomas Graf <tgraf@suug.ch>
Acked-by: default avatarFlavio Leitner <fbl@sysclose.org>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 796f2da8

net/core/skbuff.c

+1 −0
Original line number Diff line number Diff line
@@ -4148,6 +4148,7 @@ void skb_scrub_packet(struct sk_buff *skb, bool xnet) 
	skb->ignore_df = 0;

	skb_dst_drop(skb);

	skb->mark = 0;

	skb_init_secmark(skb);

	secpath_reset(skb);

	nf_reset(skb);

	nf_reset_trace(skb);