Commit af2f464e authored by Steffen Klassert's avatar Steffen Klassert Committed by David S. Miller
Browse files

xfrm: Assign esn pointers when cloning a state 



When we clone a xfrm state we have to assign the replay_esn
and the preplay_esn pointers to the state if we use the
new replay detection method. To this end, we add a
xfrm_replay_clone() function that allocates memory for
the replay detection and takes over the necessary values
from the original state.

Signed-off-by: default avatarSteffen Klassert <steffen.klassert@secunet.com>
Acked-by: default avatarHerbert Xu <herbert@gondor.apana.org.au>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 36ae0148

include/net/xfrm.h

+22 −0
Original line number Diff line number Diff line
@@ -1601,6 +1601,28 @@ static inline int xfrm_replay_state_esn_len(struct xfrm_replay_state_esn *replay 
}



#ifdef CONFIG_XFRM_MIGRATE

static inline int xfrm_replay_clone(struct xfrm_state *x,

				     struct xfrm_state *orig)

{

	x->replay_esn = kzalloc(xfrm_replay_state_esn_len(orig->replay_esn),

				GFP_KERNEL);

	if (!x->replay_esn)

		return -ENOMEM;



	x->replay_esn->bmp_len = orig->replay_esn->bmp_len;

	x->replay_esn->replay_window = orig->replay_esn->replay_window;



	x->preplay_esn = kmemdup(x->replay_esn,

				 xfrm_replay_state_esn_len(x->replay_esn),

				 GFP_KERNEL);

	if (!x->preplay_esn) {

		kfree(x->replay_esn);

		return -ENOMEM;

	}



	return 0;

}



static inline struct xfrm_algo *xfrm_algo_clone(struct xfrm_algo *orig)

{

	return kmemdup(orig, xfrm_alg_len(orig), GFP_KERNEL);

net/xfrm/xfrm_state.c

+6 −0
Original line number Diff line number Diff line
@@ -1181,6 +1181,12 @@ static struct xfrm_state *xfrm_state_clone(struct xfrm_state *orig, int *errp) 
			goto error;

	}



	if (orig->replay_esn) {

		err = xfrm_replay_clone(x, orig);

		if (err)

			goto error;

	}



	memcpy(&x->mark, &orig->mark, sizeof(x->mark));



	err = xfrm_init_state(x);

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