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kernel: fix xtables flow offload issues

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- avoid using garbage stack values as dst pointer if lookup fails
- provide the source address for ipv6 dst lookup

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2018-04-05 19:22:43 +02:00
parent 6a621f4bd9
commit 1c37cbbbec
1 changed files with 5 additions and 4 deletions
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9
target/linux/generic/hack-4.14/650-netfilter-add-xt_OFFLOAD-target.patch
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@ -70,7 +70,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
help
This option adds the flow table core infrastructure.
@@ -959,6 +958,15 @@ config NETFILTER_XT_TARGET_NOTRACK
@@ -968,6 +967,15 @@ config NETFILTER_XT_TARGET_NOTRACK
depends on NETFILTER_ADVANCED
select NETFILTER_XT_TARGET_CT
@ -88,7 +88,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
depends on NETFILTER_ADVANCED
--- a/net/netfilter/Makefile
+++ b/net/netfilter/Makefile
@@ -133,6 +133,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_CLASSIF
@@ -134,6 +134,7 @@ obj-$(CONFIG_NETFILTER_XT_TARGET_CLASSIF
obj-$(CONFIG_NETFILTER_XT_TARGET_CONNSECMARK) += xt_CONNSECMARK.o
obj-$(CONFIG_NETFILTER_XT_TARGET_CT) += xt_CT.o
obj-$(CONFIG_NETFILTER_XT_TARGET_DSCP) += xt_DSCP.o
@ -98,7 +98,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
obj-$(CONFIG_NETFILTER_XT_TARGET_LED) += xt_LED.o
--- /dev/null
+++ b/net/netfilter/xt_FLOWOFFLOAD.c
@@ -0,0 +1,364 @@
@@ -0,0 +1,365 @@
+/*
+ * Copyright (C) 2018 Felix Fietkau <nbd@nbd.name>
+ *
@ -295,7 +295,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+xt_flowoffload_dst(const struct nf_conn *ct, enum ip_conntrack_dir dir,
+ const struct xt_action_param *par)
+{
+ struct dst_entry *dst;
+ struct dst_entry *dst = NULL;
+ struct flowi fl;
+
+ memset(&fl, 0, sizeof(fl));
@ -304,6 +304,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
+ fl.u.ip4.daddr = ct->tuplehash[dir].tuple.src.u3.ip;
+ break;
+ case NFPROTO_IPV6:
+ fl.u.ip6.saddr = ct->tuplehash[dir].tuple.dst.u3.in6;
+ fl.u.ip6.daddr = ct->tuplehash[dir].tuple.src.u3.in6;
+ break;
+ }