From 00545bec9412d130c77f72a08d6c8b6ad21d4a1e Mon Sep 17 00:00:00 2001 From: Pablo Neira Ayuso Date: Wed, 5 Sep 2012 18:24:55 +0200 Subject: netfilter: fix crash during boot if NAT has been compiled built-in (c7232c9 netfilter: add protocol independent NAT core) introduced a problem that leads to crashing during boot due to NULL pointer dereference. It seems that xt_nat calls xt_register_target() before xt_init(): net/netfilter/x_tables.c:static struct xt_af *xt; is NULL and we crash on xt_register_target(struct xt_target *target) { u_int8_t af = target->family; int ret; ret = mutex_lock_interruptible(&xt[af].mutex); ... Fix this by changing the linking order, to make sure that x_tables comes before xt_nat. Reported-by: Florian Westphal Signed-off-by: Pablo Neira Ayuso --- net/netfilter/Makefile | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'net/netfilter/Makefile') diff --git a/net/netfilter/Makefile b/net/netfilter/Makefile index 98244d4c75f2..0baa3f104fcb 100644 --- a/net/netfilter/Makefile +++ b/net/netfilter/Makefile @@ -47,7 +47,6 @@ nf_nat-y := nf_nat_core.o nf_nat_proto_unknown.o nf_nat_proto_common.o \ nf_nat_proto_udp.o nf_nat_proto_tcp.o nf_nat_helper.o obj-$(CONFIG_NF_NAT) += nf_nat.o -obj-$(CONFIG_NF_NAT) += xt_nat.o # NAT protocols (nf_nat) obj-$(CONFIG_NF_NAT_PROTO_DCCP) += nf_nat_proto_dccp.o @@ -71,6 +70,7 @@ obj-$(CONFIG_NETFILTER_XTABLES) += x_tables.o xt_tcpudp.o obj-$(CONFIG_NETFILTER_XT_MARK) += xt_mark.o obj-$(CONFIG_NETFILTER_XT_CONNMARK) += xt_connmark.o obj-$(CONFIG_NETFILTER_XT_SET) += xt_set.o +obj-$(CONFIG_NF_NAT) += xt_nat.o # targets obj-$(CONFIG_NETFILTER_XT_TARGET_AUDIT) += xt_AUDIT.o -- cgit v1.2.3