netdev - [PATCH] xfrm: add SA information to the offloaded packet

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-next>] [day] [month] [year] [list]

Message-ID: <20240812182317.1962756-1-wangfe@google.com>
Date: Mon, 12 Aug 2024 11:23:17 -0700
From: Feng Wang <wangfe@...gle.com>
To: netdev@...r.kernel.org, steffen.klassert@...unet.com, 
	antony.antony@...unet.com
Cc: wangfe@...gle.com
Subject: [PATCH] xfrm: add SA information to the offloaded packet

From: wangfe <wangfe@...gle.com>

In packet offload mode, append Security Association (SA) information
to each packet, replicating the crypto offload implementation.
The XFRM_XMIT flag is set to enable packet to be returned immediately
from the validate_xmit_xfrm function, thus aligning with the existing
code path for packet offload mode.

Signed-off-by: wangfe <wangfe@...gle.com>
---
 net/xfrm/xfrm_output.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/net/xfrm/xfrm_output.c b/net/xfrm/xfrm_output.c
index e5722c95b8bb..a12588e7b060 100644
--- a/net/xfrm/xfrm_output.c
+++ b/net/xfrm/xfrm_output.c
@@ -706,6 +706,8 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb)
 	struct xfrm_state *x = skb_dst(skb)->xfrm;
 	int family;
 	int err;
+	struct xfrm_offload *xo;
+	struct sec_path *sp;
 
 	family = (x->xso.type != XFRM_DEV_OFFLOAD_PACKET) ? x->outer_mode.family
 		: skb_dst(skb)->ops->family;
@@ -728,6 +730,25 @@ int xfrm_output(struct sock *sk, struct sk_buff *skb)
 			kfree_skb(skb);
 			return -EHOSTUNREACH;
 		}
+		sp = secpath_set(skb);
+		if (!sp) {
+			XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);
+			kfree_skb(skb);
+			return -ENOMEM;
+		}
+
+		sp->olen++;
+		sp->xvec[sp->len++] = x;
+		xfrm_state_hold(x);
+
+		xo = xfrm_offload(skb);
+		if (!xo) {
+			secpath_reset(skb);
+			XFRM_INC_STATS(net, LINUX_MIB_XFRMOUTERROR);
+			kfree_skb(skb);
+			return -EINVAL;
+		}
+		xo->flags |= XFRM_XMIT;
 
 		return xfrm_output_resume(sk, skb, 0);
 	}
-- 
2.46.0.rc2.264.g509ed76dc8-goog