leandrof/linux
1
0
Fork 0
forked from Minki/linux
Code Issues Pull Requests Packages Projects Releases Wiki Activity
751eb6b604
linux/net/ipv6/netfilter
History
Liping Zhang 89e1f6d2b9 netfilter: nft_reject: restrict to INPUT/FORWARD/OUTPUT 
After I add the nft rule "nft add rule filter prerouting reject
with tcp reset", kernel panic happened on my system:
  NULL pointer dereference at ...
  IP: [<ffffffff81b9db2f>] nf_send_reset+0xaf/0x400
  Call Trace:
  [<ffffffff81b9da80>] ? nf_reject_ip_tcphdr_get+0x160/0x160
  [<ffffffffa0928061>] nft_reject_ipv4_eval+0x61/0xb0 [nft_reject_ipv4]
  [<ffffffffa08e836a>] nft_do_chain+0x1fa/0x890 [nf_tables]
  [<ffffffffa08e8170>] ? __nft_trace_packet+0x170/0x170 [nf_tables]
  [<ffffffffa06e0900>] ? nf_ct_invert_tuple+0xb0/0xc0 [nf_conntrack]
  [<ffffffffa07224d4>] ? nf_nat_setup_info+0x5d4/0x650 [nf_nat]
  [...]

Because in the PREROUTING chain, routing information is not exist,
then we will dereference the NULL pointer and oops happen.

So we restrict reject expression to INPUT, FORWARD and OUTPUT chain.
This is consistent with iptables REJECT target.

Signed-off-by: Liping Zhang <liping.zhang@spreadtrum.com>
Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
2016-08-25 12:55:34 +02:00
..
ip6_tables.c netfilter: x_tables: speed up jump target validation 2016-07-18 21:35:23 +02:00
ip6t_ah.c netfilter: ip6_tables: add flags parameter to ipv6_find_hdr() 2012-05-09 12:53:47 +02:00
ip6t_eui64.c netfilter: xtables: change hotdrop pointer to direct modification 2010-05-11 18:35:27 +02:00
ip6t_frag.c netfilter: ip6_tables: add flags parameter to ipv6_find_hdr() 2012-05-09 12:53:47 +02:00
ip6t_hbh.c netfilter: ip6_tables: add flags parameter to ipv6_find_hdr() 2012-05-09 12:53:47 +02:00
ip6t_ipv6header.c netfilter: remove unnecessary break after return 2014-07-15 16:27:00 -07:00
ip6t_MASQUERADE.c netfilter: nf_nat: generalize IPv6 masquerading support for nf_tables 2014-09-09 16:31:29 +02:00
ip6t_mh.c netfilter: xtables: change hotdrop pointer to direct modification 2010-05-11 18:35:27 +02:00
ip6t_NPT.c Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net 2013-04-07 18:37:01 -04:00
ip6t_REJECT.c netfilter: x_tables: Use par->net instead of computing from the passed net devices 2015-09-18 21:58:25 +02:00
ip6t_rpfilter.c netfilter: x_tables: Use par->net instead of computing from the passed net devices 2015-09-18 21:58:25 +02:00
ip6t_rt.c netfilter: ip6_tables: add flags parameter to ipv6_find_hdr() 2012-05-09 12:53:47 +02:00
ip6t_SYNPROXY.c netfilter: ip6t_SYNPROXY: unnecessary to check whether ip6_route_output returns NULL 2016-04-25 15:34:30 +02:00
ip6table_filter.c netfilter: xtables: don't hook tables by default 2016-03-02 20:05:24 +01:00
ip6table_mangle.c netfilter: x_tables: simplify ip{6}table_mangle_hook() 2016-07-01 16:37:02 +02:00
ip6table_nat.c netfilter: xtables: don't hook tables by default 2016-03-02 20:05:24 +01:00
ip6table_raw.c netfilter: xtables: don't hook tables by default 2016-03-02 20:05:24 +01:00
ip6table_security.c netfilter: xtables: don't hook tables by default 2016-03-02 20:05:24 +01:00
Kconfig netfilter: nf_dup: add missing dependencies with NF_CONNTRACK 2015-12-10 18:17:06 +01:00
Makefile netfilter: nf_tables: add nft_dup expression 2015-08-07 11:49:49 +02:00
nf_conntrack_l3proto_ipv6.c netfilter: remove hook owner refcounting 2015-10-16 18:21:39 +02:00
nf_conntrack_proto_icmpv6.c netfilter: ipv6: whitespace around operators 2015-10-13 14:12:38 +02:00
nf_conntrack_reasm.c Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next 2015-12-14 20:31:16 +01:00
nf_defrag_ipv6_hooks.c netfilter: ipv6: avoid nf_iterate recursion 2015-11-23 17:54:45 +01:00
nf_dup_ipv6.c netfilter: nf_dup_ipv6: set again FLOWI_FLAG_KNOWN_NH at flowi6_flags 2016-05-30 12:21:23 +02:00
nf_log_ipv6.c netfilter: Use LOGLEVEL_<FOO> defines 2015-03-25 12:09:39 +01:00
nf_nat_l3proto_ipv6.c netfilter: Allow calling into nat helper without skb_dst. 2016-03-14 23:47:27 +01:00
nf_nat_masquerade_ipv6.c netfilter: conntrack: resched in nf_ct_iterate_cleanup 2016-02-01 00:15:26 +01:00
nf_nat_proto_icmpv6.c net: Change pseudohdr argument of inet_proto_csum_replace* to be a bool 2015-08-17 21:33:06 -07:00
nf_reject_ipv6.c netfilter: ipv6: unnecessary to check whether ip6_route_output() returns NULL 2016-04-07 18:53:08 +02:00
nf_tables_ipv6.c netfilter: nf_tables: release objects on netns destruction 2015-12-28 18:34:35 +01:00
nft_chain_nat_ipv6.c netfilter: Pass priv instead of nf_hook_ops to netfilter hooks 2015-09-18 22:00:16 +02:00
nft_chain_route_ipv6.c netfilter: ipv6: code indentation 2015-10-13 14:12:38 +02:00
nft_dup_ipv6.c netfilter: Pass net to nf_dup_ipv4 and nf_dup_ipv6 2015-09-18 21:59:11 +02:00
nft_masq_ipv6.c netfilter: nft_masq: support port range 2016-03-02 20:05:27 +01:00
nft_redir_ipv6.c netfilter: nf_tables: kill nft_pktinfo.ops 2015-09-18 21:58:01 +02:00
nft_reject_ipv6.c netfilter: nft_reject: restrict to INPUT/FORWARD/OUTPUT 2016-08-25 12:55:34 +02:00