From: Yi-Hung Wei yihung.wei@gmail.com
[ 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@...
Fixes: 256c87c17c53 ("net: check tunnel option type in tunnel flags") Signed-off-by: Yi-Hung Wei yihung.wei@gmail.com Link: https://lore.kernel.org/r/1605053800-74072-1-git-send-email-yihung.wei@gmail... Signed-off-by: Jakub Kicinski kuba@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/net/geneve.c | 3 +-- include/net/ip_tunnels.h | 7 ++++--- 2 files changed, 5 insertions(+), 5 deletions(-)
diff --git a/drivers/net/geneve.c b/drivers/net/geneve.c index 974a244f45ba0..67c86ebfa7da2 100644 --- a/drivers/net/geneve.c +++ b/drivers/net/geneve.c @@ -225,8 +225,7 @@ 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 02ccd32542d0a..61620677b0347 100644 --- a/include/net/ip_tunnels.h +++ b/include/net/ip_tunnels.h @@ -478,9 +478,11 @@ 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) @@ -526,7 +528,6 @@ 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 */