This is a note to let you know that I've just added the patch titled
ip_tunnels: Set tunnel option flag when tunnel metadata is present
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
ip_tunnels-set-tunnel-option-flag-when-tunnel-metada.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 79f14ca55e751b1ce118913045f598c1535bcd89
Author: Yi-Hung Wei <yihung.wei@xxxxxxxxx>
Date: Tue Nov 10 16:16:40 2020 -0800
ip_tunnels: Set tunnel option flag when tunnel metadata is present
[ Upstream commit 9c2e14b48119b39446031d29d994044ae958d8fc ]
Currently, we may set the tunnel option flag when the size of metadata
is zero. For example, we set TUNNEL_GENEVE_OPT in the receive function
no matter the geneve option is present or not. As this may result in
issues on the tunnel flags consumers, this patch fixes the issue.
Related discussion:
* https://lore.kernel.org/netdev/1604448694-19351-1-git-send-email-yihung.wei@xxxxxxxxx/T/#u
Fixes: 256c87c17c53 ("net: check tunnel option type in tunnel flags")
Signed-off-by: Yi-Hung Wei <yihung.wei@xxxxxxxxx>
Link: https://lore.kernel.org/r/1605053800-74072-1-git-send-email-yihung.wei@xxxxxxxxx
Signed-off-by: Jakub Kicinski <kuba@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c
index d0b5844c8a315..2e2afc824a6a8 100644
--- a/drivers/net/geneve.c
+++ b/drivers/net/geneve.c
@@ -223,8 +223,7 @@ static void geneve_rx(struct geneve_dev *geneve, struct geneve_sock *gs,
if (ip_tunnel_collect_metadata() || gs->collect_md) {
__be16 flags;
- flags = TUNNEL_KEY | TUNNEL_GENEVE_OPT |
- (gnvh->oam ? TUNNEL_OAM : 0) |
+ flags = TUNNEL_KEY | (gnvh->oam ? TUNNEL_OAM : 0) |
(gnvh->critical ? TUNNEL_CRIT_OPT : 0);
tun_dst = udp_tun_rx_dst(skb, geneve_get_sk_family(gs), flags,
diff --git a/include/net/ip_tunnels.h b/include/net/ip_tunnels.h
index e11423530d642..f8873c4eb003a 100644
--- a/include/net/ip_tunnels.h
+++ b/include/net/ip_tunnels.h
@@ -489,9 +489,11 @@ static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info,
const void *from, int len,
__be16 flags)
{
- memcpy(ip_tunnel_info_opts(info), from, len);
info->options_len = len;
- info->key.tun_flags |= flags;
+ if (len > 0) {
+ memcpy(ip_tunnel_info_opts(info), from, len);
+ info->key.tun_flags |= flags;
+ }
}
static inline struct ip_tunnel_info *lwt_tun_info(struct lwtunnel_state *lwtstate)
@@ -537,7 +539,6 @@ static inline void ip_tunnel_info_opts_set(struct ip_tunnel_info *info,
__be16 flags)
{
info->options_len = 0;
- info->key.tun_flags |= flags;
}
#endif /* CONFIG_INET */
