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linux/net/netfilter
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Pablo Neira Ayuso ba8d3b0bf5 netfilter: nfnetlink_queue: fix maximum packet length to userspace 
The packets that we send via NFQUEUE are encapsulated in the NFQA_PAYLOAD
attribute. The length of the packet in userspace is obtained via
attr->nla_len field. This field contains the size of the Netlink
attribute header plus the packet length.

If the maximum packet length is specified, ie. 65535 bytes, and
packets in the range of (65531,65535] are sent to userspace, the
attr->nla_len overflows and it reports bogus lengths to the
application.

To fix this, this patch limits the maximum packet length to 65531
bytes. If larger packet length is specified, the packet that we
send to user-space is truncated to 65531 bytes.

To support 65535 bytes packets, we have to revisit the idea of
the 32-bits Netlink attribute length.

Reported-by: Florian Westphal <fw@strlen.de>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2012-09-24 14:47:40 +02:00
..
ipset netfilter: ipset: Support to match elements marked with "nomatch" 2012-09-22 22:44:34 +02:00
ipvs Merge branch 'master' of git://1984.lsi.us.es/nf-next 2012-09-13 14:24:31 -04:00
core.c netfilter: pass 'nf_hook_ops' instead of 'list_head' to nf_queue() 2012-09-03 13:52:54 +02:00
Kconfig netfilter: combine ipt_REDIRECT and ip6t_REDIRECT 2012-09-21 12:12:05 +02:00
Makefile netfilter: combine ipt_REDIRECT and ip6t_REDIRECT 2012-09-21 12:12:05 +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 netfilter: nf_nat: support IPv6 in amanda NAT helper 2012-08-30 03:00:21 +02:00
nf_conntrack_broadcast.c
nf_conntrack_core.c netfilter: nf_nat: fix oops when unloading protocol modules 2012-09-21 11:35:18 +02:00
nf_conntrack_ecache.c netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
nf_conntrack_expect.c netfilter: nf_ct_expect: fix possible access to uninitialized timer 2012-08-16 11:49:53 +02:00
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_ftp: add sequence tracking pickup facility for injected entries 2012-09-24 14:29:40 +02:00
nf_conntrack_h323_asn1.c netfilter: h323: bug in parsing of ASN1 SEQOF field 2011-04-04 15:21:02 +02:00
nf_conntrack_h323_main.c netfilter: nf_nat: add protoff argument to packet mangling functions 2012-08-30 03:00:13 +02:00
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_nat: support IPv6 in IRC NAT helper 2012-08-30 03:00:23 +02:00
nf_conntrack_l3proto_generic.c
nf_conntrack_netbios_ns.c
nf_conntrack_netlink.c netfilter: nf_ct_ftp: add sequence tracking pickup facility for injected entries 2012-09-24 14:29:40 +02:00
nf_conntrack_pptp.c netfilter: nf_nat: add protoff argument to packet mangling functions 2012-08-30 03:00:13 +02:00
nf_conntrack_proto.c netfilter: nf_conntrack: remove unnecessary RTNL locking 2012-08-20 12:46:29 +02:00
nf_conntrack_proto_dccp.c netfilter: nf_ct_dccp: add dccp_kmemdup_sysctl_table function 2012-06-27 19:14:31 +02:00
nf_conntrack_proto_generic.c netfilter: nf_conntrack: generalize nf_ct_l4proto_net 2012-07-04 19:37:22 +02:00
nf_conntrack_proto_gre.c netfilter: nf_conntrack: prepare l4proto->init_net cleanup 2012-06-27 18:31:14 +02:00
nf_conntrack_proto_sctp.c netfilter: nf_ct_sctp: merge sctpv[4,6]_net_init into sctp_net_init 2012-06-27 19:13:31 +02:00
nf_conntrack_proto_tcp.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-09-15 11:43:53 -04:00
nf_conntrack_proto_udp.c netfilter: nf_conntrack: generalize nf_ct_l4proto_net 2012-07-04 19:37:22 +02:00
nf_conntrack_proto_udplite.c netfilter: nf_ct_udplite: add udplite_kmemdup_sysctl_table function 2012-06-27 19:12:52 +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_nat: support IPv6 in SIP NAT helper 2012-08-30 03:00:22 +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_nat: support IPv6 in TFTP NAT helper 2012-08-30 03:00:24 +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 netfilter: pass 'nf_hook_ops' instead of 'list_head' to nf_queue() 2012-09-03 13:52:54 +02:00
nf_log.c net: Convert all sysctl registrations to register_net_sysctl 2012-04-20 21:22:30 -04:00
nf_nat_amanda.c netfilter: nf_nat: support IPv6 in amanda NAT helper 2012-08-30 03:00:21 +02:00
nf_nat_core.c netfilter: nf_nat: remove obsolete rcu_read_unlock call 2012-09-21 12:09:25 +02:00
nf_nat_ftp.c netfilter: nf_nat: support IPv6 in FTP NAT helper 2012-08-30 03:00:20 +02:00
nf_nat_helper.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_irc.c netfilter: nf_nat: support IPv6 in IRC NAT helper 2012-08-30 03:00:23 +02:00
nf_nat_proto_common.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_proto_dccp.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_proto_sctp.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_proto_tcp.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_proto_udp.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_proto_udplite.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_proto_unknown.c netfilter: add protocol independent NAT core 2012-08-30 03:00:14 +02:00
nf_nat_sip.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2012-09-03 15:34:51 +02:00
nf_nat_tftp.c netfilter: nf_nat: support IPv6 in TFTP NAT helper 2012-08-30 03:00:24 +02:00
nf_queue.c netfilter: pass 'nf_hook_ops' instead of 'list_head' to nf_queue() 2012-09-03 13:52:54 +02:00
nf_sockopt.c
nf_tproxy_core.c
nfnetlink.c netlink: hide struct module parameter in netlink_kernel_create 2012-09-08 18:46:30 -04:00
nfnetlink_acct.c netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
nfnetlink_cthelper.c netfilter: nf_ct_ftp: add sequence tracking pickup facility for injected entries 2012-09-24 14:29:40 +02:00
nfnetlink_cttimeout.c netlink: Rename pid to portid to avoid confusion 2012-09-10 15:30:41 -04:00
nfnetlink_log.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-09-15 11:43:53 -04:00
nfnetlink_queue_core.c netfilter: nfnetlink_queue: fix maximum packet length to userspace 2012-09-24 14:47:40 +02:00
nfnetlink_queue_ct.c netfilter: nfnetlink_queue: fix sparse warning due to missing include 2012-06-23 02:13:38 +02:00
x_tables.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
xt_addrtype.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
xt_AUDIT.c ipv6: Add fragment reporting to ipv6_skip_exthdr(). 2011-12-03 09:35:10 -08:00
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 netfilter: revert a2361c8735 2011-05-10 12:13:36 +02:00
xt_cpu.c
xt_CT.c netfilter: xt_CT: refactorize xt_ct_tg_check 2012-09-03 13:32:48 +02:00
xt_dccp.c
xt_devgroup.c
xt_dscp.c
xt_DSCP.c netfilter: IPv6: fix DSCP mangle code 2011-05-10 10:00:21 +02:00
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 netfilter: Reduce switch/case indent 2011-07-01 16:11:15 -07:00
xt_HL.c netfilter: Reduce switch/case indent 2011-07-01 16:11:15 -07:00
xt_HMARK.c netfilter: xt_HMARK: fix endianness and provide consistent hashing 2012-06-07 14:53:01 +02:00
xt_IDLETIMER.c netfilter: Remove unnecessary OOM logging messages 2011-11-01 09:19:49 +01:00
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 Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2012-09-15 11:43:53 -04:00
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_nat.c netfilter: ipv6: add IPv6 NAT support 2012-08-30 03:00:17 +02:00
xt_NETMAP.c netfilter: combine ipt_NETMAP and ip6t_NETMAP 2012-09-21 12:11:08 +02:00
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: sparse endian fixes 2012-08-20 12:45:57 +02:00
xt_osf.c netfilter: sparse endian fixes 2012-08-20 12:45:57 +02:00
xt_owner.c userns: xt_owner: Add basic user namespace support. 2012-08-14 21:55:30 -07:00
xt_physdev.c
xt_pkttype.c
xt_policy.c
xt_quota.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
xt_rateest.c netfilter: xt_rateest: fix xt_rateest_mt_checkentry() 2011-07-29 16:24:46 +02:00
xt_RATEEST.c net,rcu: Convert call_rcu(xt_rateest_free_rcu) to kfree_rcu() 2011-07-20 14:10:19 -07:00
xt_realm.c
xt_recent.c userns xt_recent: Specify the owner/group of ip_list_perms in the initial user namespace 2012-08-14 21:55:29 -07:00
xt_REDIRECT.c netfilter: combine ipt_REDIRECT and ip6t_REDIRECT 2012-09-21 12:12:05 +02:00
xt_repldata.h
xt_sctp.c
xt_SECMARK.c
xt_set.c netfilter: ipset: Support to match elements marked with "nomatch" 2012-09-22 22:44:34 +02:00
xt_socket.c netfilter: xt_socket: fix compilation warnings with gcc 4.7 2012-09-03 13:31:39 +02:00
xt_state.c
xt_statistic.c net: Fix files explicitly needing to include module.h 2011-10-31 19:30:28 -04:00
xt_string.c
xt_TCPMSS.c net: Convert net_ratelimit uses to net_<level>_ratelimited 2012-05-15 13:45:03 -04:00
xt_tcpmss.c
xt_TCPOPTSTRIP.c net:netfilter: use IS_ENABLED 2011-12-16 15:49:52 -05:00
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 netfilter: xt_time: add support to ignore day transition 2012-09-24 14:29:01 +02:00
xt_TPROXY.c net: Fix (nearly-)kernel-doc comments for various functions 2012-07-10 23:13:45 -07:00
xt_TRACE.c
xt_u32.c