xfrm: policy: check reinserted policies match their node

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validate the re-inserted policies match the lookup node.
Policies that fail this test won't be returned in the candidate set.

This is enabled by default for now, it should not cause noticeable
reinsert slow down.

Such reinserts are needed when we have to merge an existing node
(e.g. for 10.0.0.0/28 because a overlapping subnet was added (e.g.
10.0.0.0/24), so whenever this happens existing policies have to
be placed on the list of the new node.

Signed-off-by: Florian Westphal <fw@strlen.de>
Acked-by: David S. Miller <davem@davemloft.net>
Signed-off-by: Steffen Klassert <steffen.klassert@secunet.com>

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Florian Westphal 2018-11-07 23:00:39 +01:00 • committed by Steffen Klassert

parent 9cf545ebd5

commit e901cbc293

1 changed files with 32 additions and 0 deletions

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net/xfrm/xfrm_policy.c

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