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authorMadhu Koriginja2023-03-21 21:28:44 +0530
committerGreg Kroah-Hartman2023-05-11 23:03:18 +0900
commit2361aee1c52cf237a9d85ad9e2625fb8a473a4ff (patch)
treec3dd53a60384530d8d0efb961f9737d6f1d3b09d /net/ipv6
parent8d05f25475a25719c6592bde3ee1245a860d1769 (diff)
netfilter: keep conntrack reference until IPsecv6 policy checks are done
[ Upstream commit b0e214d212030fe497d4d150bb3474e50ad5d093 ] Keep the conntrack reference until policy checks have been performed for IPsec V6 NAT support, just like ipv4. The reference needs to be dropped before a packet is queued to avoid having the conntrack module unloadable. Fixes: 58a317f1061c ("netfilter: ipv6: add IPv6 NAT support") Signed-off-by: Madhu Koriginja <madhu.koriginja@nxp.com> Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/ip6_input.c14
-rw-r--r--net/ipv6/raw.c5
-rw-r--r--net/ipv6/tcp_ipv6.c2
-rw-r--r--net/ipv6/udp.c2
4 files changed, 12 insertions, 11 deletions
diff --git a/net/ipv6/ip6_input.c b/net/ipv6/ip6_input.c
index e1ebf5e42ebe..d94041bb4287 100644
--- a/net/ipv6/ip6_input.c
+++ b/net/ipv6/ip6_input.c
@@ -404,10 +404,6 @@ resubmit_final:
/* Only do this once for first final protocol */
have_final = true;
- /* Free reference early: we don't need it any more,
- and it may hold ip_conntrack module loaded
- indefinitely. */
- nf_reset_ct(skb);
skb_postpull_rcsum(skb, skb_network_header(skb),
skb_network_header_len(skb));
@@ -430,10 +426,12 @@ resubmit_final:
goto discard;
}
}
- if (!(ipprot->flags & INET6_PROTO_NOPOLICY) &&
- !xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
- SKB_DR_SET(reason, XFRM_POLICY);
- goto discard;
+ if (!(ipprot->flags & INET6_PROTO_NOPOLICY)) {
+ if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb)) {
+ SKB_DR_SET(reason, XFRM_POLICY);
+ goto discard;
+ }
+ nf_reset_ct(skb);
}
ret = INDIRECT_CALL_2(ipprot->handler, tcp_v6_rcv, udpv6_rcv,
diff --git a/net/ipv6/raw.c b/net/ipv6/raw.c
index 4fc511bdf176..f44b99f7ecdc 100644
--- a/net/ipv6/raw.c
+++ b/net/ipv6/raw.c
@@ -193,10 +193,8 @@ static bool ipv6_raw_deliver(struct sk_buff *skb, int nexthdr)
struct sk_buff *clone = skb_clone(skb, GFP_ATOMIC);
/* Not releasing hash table! */
- if (clone) {
- nf_reset_ct(clone);
+ if (clone)
rawv6_rcv(sk, clone);
- }
}
}
rcu_read_unlock();
@@ -387,6 +385,7 @@ int rawv6_rcv(struct sock *sk, struct sk_buff *skb)
kfree_skb(skb);
return NET_RX_DROP;
}
+ nf_reset_ct(skb);
if (!rp->checksum)
skb->ip_summed = CHECKSUM_UNNECESSARY;
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 81afb40bfc0b..c563a84d67b4 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -1722,6 +1722,8 @@ process:
if (drop_reason)
goto discard_and_relse;
+ nf_reset_ct(skb);
+
if (tcp_filter(sk, skb)) {
drop_reason = SKB_DROP_REASON_SOCKET_FILTER;
goto discard_and_relse;
diff --git a/net/ipv6/udp.c b/net/ipv6/udp.c
index 0b8127988adb..c029222ce46b 100644
--- a/net/ipv6/udp.c
+++ b/net/ipv6/udp.c
@@ -701,6 +701,7 @@ static int udpv6_queue_rcv_one_skb(struct sock *sk, struct sk_buff *skb)
drop_reason = SKB_DROP_REASON_XFRM_POLICY;
goto drop;
}
+ nf_reset_ct(skb);
if (static_branch_unlikely(&udpv6_encap_needed_key) && up->encap_type) {
int (*encap_rcv)(struct sock *sk, struct sk_buff *skb);
@@ -1024,6 +1025,7 @@ int __udp6_lib_rcv(struct sk_buff *skb, struct udp_table *udptable,
if (!xfrm6_policy_check(NULL, XFRM_POLICY_IN, skb))
goto discard;
+ nf_reset_ct(skb);
if (udp_lib_checksum_complete(skb))
goto csum_error;