Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/net/ipv4/xfrm4_output.c b/net/ipv4/xfrm4_output.c
index be980c1..ecff3fc 100644
--- a/net/ipv4/xfrm4_output.c
+++ b/net/ipv4/xfrm4_output.c
@@ -1,11 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
/*
* xfrm4_output.c - Common IPsec encapsulation code for IPv4.
* Copyright (c) 2004 Herbert Xu <herbert@gondor.apana.org.au>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
*/
#include <linux/if_ether.h>
@@ -58,21 +54,6 @@
return xfrm4_extract_header(skb);
}
-int xfrm4_prepare_output(struct xfrm_state *x, struct sk_buff *skb)
-{
- int err;
-
- err = xfrm_inner_extract_output(x, skb);
- if (err)
- return err;
-
- IPCB(skb)->flags |= IPSKB_XFRM_TUNNEL_SIZE;
- skb->protocol = htons(ETH_P_IP);
-
- return x->outer_mode->output2(x, skb);
-}
-EXPORT_SYMBOL(xfrm4_prepare_output);
-
int xfrm4_output_finish(struct sock *sk, struct sk_buff *skb)
{
memset(IPCB(skb), 0, sizeof(*IPCB(skb)));
@@ -87,6 +68,8 @@
static int __xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)
{
struct xfrm_state *x = skb_dst(skb)->xfrm;
+ const struct xfrm_state_afinfo *afinfo;
+ int ret = -EAFNOSUPPORT;
#ifdef CONFIG_NETFILTER
if (!x) {
@@ -95,7 +78,15 @@
}
#endif
- return x->outer_mode->afinfo->output_finish(sk, skb);
+ rcu_read_lock();
+ afinfo = xfrm_state_afinfo_get_rcu(x->outer_mode.family);
+ if (likely(afinfo))
+ ret = afinfo->output_finish(sk, skb);
+ else
+ kfree_skb(skb);
+ rcu_read_unlock();
+
+ return ret;
}
int xfrm4_output(struct net *net, struct sock *sk, struct sk_buff *skb)