netdev - Re: [PATCH xfrm-next v2 5/6] xfrm: add RX datapath protection for IPsec full offload mode

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite for Android: free password hash cracker in your pocket

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Thu, 18 Aug 2022 12:27:08 +0200
From:   Steffen Klassert <steffen.klassert@...unet.com>
To:     Leon Romanovsky <leon@...nel.org>
CC:     Leon Romanovsky <leonro@...dia.com>,
        "David S . Miller" <davem@...emloft.net>,
        Herbert Xu <herbert@...dor.apana.org.au>,
        <netdev@...r.kernel.org>, Raed Salem <raeds@...dia.com>,
        ipsec-devel <devel@...ux-ipsec.org>
Subject: Re: [PATCH xfrm-next v2 5/6] xfrm: add RX datapath protection for
 IPsec full offload mode

On Tue, Aug 16, 2022 at 11:59:26AM +0300, Leon Romanovsky wrote:
> From: Leon Romanovsky <leonro@...dia.com>
> 
> Traffic received by device with enabled IPsec full offload should be
> forwarded to the stack only after decryption, packet headers and
> trailers removed.
> 
> Such packets are expected to be seen as normal (non-XFRM) ones, while
> not-supported packets should be dropped by the HW.
> 
> Reviewed-by: Raed Salem <raeds@...dia.com>
> Signed-off-by: Leon Romanovsky <leonro@...dia.com>

> @@ -1125,6 +1148,15 @@ static inline int __xfrm_policy_check2(struct sock *sk, int dir,
>  {
>  	struct net *net = dev_net(skb->dev);
>  	int ndir = dir | (reverse ? XFRM_POLICY_MASK + 1 : 0);
> +	struct xfrm_offload *xo = xfrm_offload(skb);
> +	struct xfrm_state *x;
> +
> +	if (xo) {
> +		x = xfrm_input_state(skb);
> +		if (x->xso.type == XFRM_DEV_OFFLOAD_FULL)
> +			return (xo->flags & CRYPTO_DONE) &&
> +			       (xo->status & CRYPTO_SUCCESS);
> +	}
>  
>  	if (sk && sk->sk_policy[XFRM_POLICY_IN])
>  		return __xfrm_policy_check(sk, ndir, skb, family);

What happens here if there is a socket policy configured?