From 3cc2f6b71eb6c9134d0c0714f2beb88997bd0bee Mon Sep 17 00:00:00 2001 From: Peilin Ye Date: Thu, 14 Apr 2022 13:34:26 -0700 Subject: ip6_gre: Avoid updating tunnel->tun_hlen in __gre6_xmit() [ Upstream commit f40c064e933d7787ca7411b699504d7a2664c1f5 ] Do not update tunnel->tun_hlen in data plane code. Use a local variable instead, just like "tunnel_hlen" in net/ipv4/ip_gre.c:gre_fb_xmit(). Co-developed-by: Cong Wang Signed-off-by: Cong Wang Signed-off-by: Peilin Ye Signed-off-by: David S. Miller Signed-off-by: Sasha Levin --- net/ipv6/ip6_gre.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'net') diff --git a/net/ipv6/ip6_gre.c b/net/ipv6/ip6_gre.c index 466a5610e3ca..288720838329 100644 --- a/net/ipv6/ip6_gre.c +++ b/net/ipv6/ip6_gre.c @@ -743,6 +743,7 @@ static netdev_tx_t __gre6_xmit(struct sk_buff *skb, struct ip_tunnel_info *tun_info; const struct ip_tunnel_key *key; __be16 flags; + int tun_hlen; tun_info = skb_tunnel_info_txcheck(skb); if (IS_ERR(tun_info) || @@ -760,9 +761,9 @@ static netdev_tx_t __gre6_xmit(struct sk_buff *skb, dsfield = key->tos; flags = key->tun_flags & (TUNNEL_CSUM | TUNNEL_KEY | TUNNEL_SEQ); - tunnel->tun_hlen = gre_calc_hlen(flags); + tun_hlen = gre_calc_hlen(flags); - gre_build_header(skb, tunnel->tun_hlen, + gre_build_header(skb, tun_hlen, flags, protocol, tunnel_id_to_key32(tun_info->key.tun_id), (flags & TUNNEL_SEQ) ? htonl(tunnel->o_seqno++) -- cgit v1.2.3