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32f5376003
linux/net/netfilter
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Pablo Neira Ayuso 32f5376003 netfilter: nf_ct_helper: disable automatic helper re-assignment of different type 
This patch modifies __nf_ct_try_assign_helper in a way that invalidates support
for the following scenario:

1) attach the helper A for first time when the conntrack is created
2) attach new (different) helper B due to changes the reply tuple caused by NAT

eg. port redirection from TCP/21 to TCP/5060 with both FTP and SIP helpers
loaded, which seems to be a quite unorthodox scenario.

I can provide a more elaborated patch to support this scenario but explicit
helper attachment provides a better solution for this since now the use can
attach the helpers consistently, without relying on the automatic helper
lookup magic.

This patch fixes a possible out of bound zeroing of the conntrack helper
extension if the helper B uses more memory for its private data than
helper A.

Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-06-19 01:24:52 +02:00
..
ipset Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-05-16 22:17:37 -04:00
ipvs Merge branch 'master' of git://1984.lsi.us.es/net-next 2012-06-11 12:56:14 -07:00
core.c netfilter: add glue code to integrate nfnetlink_queue and ctnetlink 2012-06-16 15:09:02 +02:00
Kconfig netfilter: add user-space connection tracking helper infrastructure 2012-06-16 15:40:02 +02:00
Makefile netfilter: add user-space connection tracking helper infrastructure 2012-06-16 15:40:02 +02:00
nf_conntrack_acct.c net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
nf_conntrack_amanda.c net: Convert net_ratelimit uses to net_<level>_ratelimited 2012-05-15 13:45:03 -04:00
nf_conntrack_broadcast.c
nf_conntrack_core.c netfilter: nf_ct_helper: implement variable length helper private data 2012-06-16 15:08:55 +02:00
nf_conntrack_ecache.c netfilter: nf_ct_ecache: refactor notifier registration 2012-05-08 19:17:23 +02:00
nf_conntrack_expect.c net: Convert net_ratelimit uses to net_<level>_ratelimited 2012-05-15 13:45:03 -04:00
nf_conntrack_extend.c netfilter: nf_ct_ext: support variable length extensions 2012-06-16 15:08:49 +02:00
nf_conntrack_ftp.c netfilter: nf_ct_helper: implement variable length helper private data 2012-06-16 15:08:55 +02:00
nf_conntrack_h323_asn1.c
nf_conntrack_h323_main.c Merge branch 'master' of git://1984.lsi.us.es/nf-next 2012-06-16 15:23:35 -07:00
nf_conntrack_h323_types.c
nf_conntrack_helper.c netfilter: nf_ct_helper: disable automatic helper re-assignment of different type 2012-06-19 01:24:52 +02:00
nf_conntrack_irc.c netfilter: nf_ct_helper: allocate 16 bytes for the helper and policy names 2012-06-16 15:08:39 +02:00
nf_conntrack_l3proto_generic.c
nf_conntrack_netbios_ns.c
nf_conntrack_netlink.c netfilter: ctnetlink: fix NULL dereference while trying to change helper 2012-06-19 00:18:38 +02:00
nf_conntrack_pptp.c netfilter: nf_ct_helper: implement variable length helper private data 2012-06-16 15:08:55 +02:00
nf_conntrack_proto_dccp.c netfilter: nf_conntrack: add namespace support for cttimeout 2012-06-07 14:58:41 +02:00
nf_conntrack_proto_generic.c netfilter: nf_conntrack: add namespace support for cttimeout 2012-06-07 14:58:41 +02:00
nf_conntrack_proto_gre.c netfilter: nf_ct_helper: implement variable length helper private data 2012-06-16 15:08:55 +02:00
nf_conntrack_proto_sctp.c netfilter: nf_conntrack: add namespace support for cttimeout 2012-06-07 14:58:41 +02:00
nf_conntrack_proto_tcp.c netfilter: nf_ct_tcp, udp: fix compilation with sysctl disabled 2012-06-11 15:22:46 -07:00
nf_conntrack_proto_udp.c netfilter: nf_ct_tcp, udp: fix compilation with sysctl disabled 2012-06-11 15:22:46 -07:00
nf_conntrack_proto_udplite.c netfilter: nf_conntrack: add namespace support for cttimeout 2012-06-07 14:58:41 +02:00
nf_conntrack_proto.c netfilter: nf_ct_icmp: add namespace support 2012-06-07 14:58:40 +02:00
nf_conntrack_sane.c netfilter: nf_ct_helper: implement variable length helper private data 2012-06-16 15:08:55 +02:00
nf_conntrack_sip.c netfilter: nf_ct_helper: implement variable length helper private data 2012-06-16 15:08:55 +02:00
nf_conntrack_snmp.c
nf_conntrack_standalone.c net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
nf_conntrack_tftp.c netfilter: nf_ct_helper: allocate 16 bytes for the helper and policy names 2012-06-16 15:08:39 +02:00
nf_conntrack_timeout.c netfilter: nf_ct_ext: add timeout extension 2012-03-07 17:41:25 +01:00
nf_conntrack_timestamp.c net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
nf_internals.h
nf_log.c net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
nf_queue.c netfilter: nf_queue: fix queueing of bridged gro skbs 2012-02-09 20:47:53 +01:00
nf_sockopt.c
nf_tproxy_core.c
nfnetlink_acct.c nfnetlink_acct: Stop using NLA_PUT*(). 2012-04-01 18:46:29 -04:00
nfnetlink_cthelper.c netfilter: add user-space connection tracking helper infrastructure 2012-06-16 15:40:02 +02:00
nfnetlink_cttimeout.c netfilter: nf_conntrack: add namespace support for cttimeout 2012-06-07 14:58:41 +02:00
nfnetlink_log.c nfnetlink_log: Stop using NLA_PUT*(). 2012-04-01 18:43:44 -04:00
nfnetlink_queue.c netfilter: nfnetlink_queue: add NAT TCP sequence adjustment if packet mangled 2012-06-16 15:09:08 +02:00
nfnetlink.c net: cleanup unsigned to unsigned int 2012-04-15 12:44:40 -04:00
x_tables.c
xt_addrtype.c
xt_AUDIT.c
xt_CHECKSUM.c
xt_CLASSIFY.c
xt_cluster.c
xt_comment.c
xt_connbytes.c Merge branch 'nf-next' of git://1984.lsi.us.es/net-next 2011-12-25 02:21:45 -05:00
xt_connlimit.c netfilter: xt_connlimit: remove revision 0 2012-06-07 14:58:39 +02:00
xt_connmark.c
xt_CONNSECMARK.c
xt_conntrack.c
xt_cpu.c
xt_CT.c netfilter: nf_ct_helper: implement variable length helper private data 2012-06-16 15:08:55 +02:00
xt_dccp.c
xt_devgroup.c
xt_dscp.c
xt_DSCP.c
xt_ecn.c netfilter: xtables: collapse conditions in xt_ecn 2011-12-27 20:45:25 +01:00
xt_esp.c
xt_hashlimit.c netfilter: xt_hashlimit: use _ALL macro to reject unknown flag bits 2012-05-17 00:56:31 +02:00
xt_helper.c
xt_hl.c
xt_HL.c
xt_HMARK.c netfilter: xt_HMARK: fix endianness and provide consistent hashing 2012-06-07 14:53:01 +02:00
xt_IDLETIMER.c
xt_iprange.c
xt_ipvs.c
xt_LED.c
xt_length.c
xt_limit.c netfilter: limit, hashlimit: avoid duplicated inline 2012-05-09 12:54:06 +02:00
xt_LOG.c netfilter: xt_LOG: use CONFIG_IP6_NF_IPTABLES instead of CONFIG_IPV6 2012-03-22 11:50:56 +01:00
xt_mac.c netfilter: Convert compare_ether_addr to ether_addr_equal 2012-05-09 20:49:18 -04:00
xt_mark.c
xt_multiport.c
xt_nfacct.c netfilter: xtables: add nfacct match to support extended accounting 2011-12-25 02:43:17 +01:00
xt_NFLOG.c
xt_NFQUEUE.c netfilter: NFQUEUE: don't xor src/dst ip address for load distribution 2012-06-07 14:58:42 +02:00
xt_NOTRACK.c
xt_osf.c
xt_owner.c
xt_physdev.c
xt_pkttype.c
xt_policy.c
xt_quota.c
xt_rateest.c
xt_RATEEST.c
xt_realm.c
xt_recent.c netfilter: xt_recent: add address masking option 2012-06-07 14:58:42 +02:00
xt_repldata.h
xt_sctp.c
xt_SECMARK.c
xt_set.c netfilter: ipset: fix timeout value overflow bug 2012-05-17 00:56:41 +02:00
xt_socket.c netfilter: ip6_tables: add flags parameter to ipv6_find_hdr() 2012-05-09 12:53:47 +02:00
xt_state.c
xt_statistic.c
xt_string.c
xt_tcpmss.c
xt_TCPMSS.c net: Convert net_ratelimit uses to net_<level>_ratelimited 2012-05-15 13:45:03 -04:00
xt_TCPOPTSTRIP.c
xt_tcpudp.c
xt_TEE.c net: replace percpu_xxx funcs with this_cpu_xxx or __this_cpu_xxx 2012-05-14 14:15:31 -07:00
xt_time.c
xt_TPROXY.c netfilter: ip6_tables: add flags parameter to ipv6_find_hdr() 2012-05-09 12:53:47 +02:00
xt_TRACE.c
xt_u32.c