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authorEelco Chaudron <echaudro@redhat.com>2020-12-07 13:08:39 +0300
committerJakub Kicinski <kuba@kernel.org>2020-12-15 04:18:25 +0300
commit09d6217254c004f6237cc2c2bfe604af58e9a8c5 (patch)
tree0faaf1e2e9ac3a14acd967672f7da9df45bdb825 /net
parent7bca5021a4e653a323492cb500cfc387331481b9 (diff)
downloadlinux-09d6217254c004f6237cc2c2bfe604af58e9a8c5.tar.xz
net: openvswitch: fix TTL decrement exception action execution
Currently, the exception actions are not processed correctly as the wrong dataset is passed. This change fixes this, including the misleading comment. In addition, a check was added to make sure we work on an IPv4 packet, and not just assume if it's not IPv6 it's IPv4. This was all tested using OVS with patch, https://patchwork.ozlabs.org/project/openvswitch/list/?series=21639, applied and sending packets with a TTL of 1 (and 0), both with IPv4 and IPv6. Fixes: 69929d4c49e1 ("net: openvswitch: fix TTL decrement action netlink message format") Signed-off-by: Eelco Chaudron <echaudro@redhat.com> Link: https://lore.kernel.org/r/160733569860.3007.12938188180387116741.stgit@wsfd-netdev64.ntdv.lab.eng.bos.redhat.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net')
-rw-r--r--net/openvswitch/actions.c15
1 files changed, 6 insertions, 9 deletions
diff --git a/net/openvswitch/actions.c b/net/openvswitch/actions.c
index c3a664871cb5..e8902a7e60f2 100644
--- a/net/openvswitch/actions.c
+++ b/net/openvswitch/actions.c
@@ -959,16 +959,13 @@ static int dec_ttl_exception_handler(struct datapath *dp, struct sk_buff *skb,
struct sw_flow_key *key,
const struct nlattr *attr, bool last)
{
- /* The first action is always 'OVS_DEC_TTL_ATTR_ARG'. */
- struct nlattr *dec_ttl_arg = nla_data(attr);
+ /* The first attribute is always 'OVS_DEC_TTL_ATTR_ACTION'. */
+ struct nlattr *actions = nla_data(attr);
- if (nla_len(dec_ttl_arg)) {
- struct nlattr *actions = nla_data(dec_ttl_arg);
+ if (nla_len(actions))
+ return clone_execute(dp, skb, key, 0, nla_data(actions),
+ nla_len(actions), last, false);
- if (actions)
- return clone_execute(dp, skb, key, 0, nla_data(actions),
- nla_len(actions), last, false);
- }
consume_skb(skb);
return 0;
}
@@ -1212,7 +1209,7 @@ static int execute_dec_ttl(struct sk_buff *skb, struct sw_flow_key *key)
return -EHOSTUNREACH;
key->ip.ttl = --nh->hop_limit;
- } else {
+ } else if (skb->protocol == htons(ETH_P_IP)) {
struct iphdr *nh;
u8 old_ttl;