mirror of https://github.com/torvalds/linux.git
f359b809d5
Referencing a synproxy stateful object from OUTPUT hook causes kernel
crash due to infinite recursive calls:
BUG: TASK stack guard page was hit at 000000008bda5b8c (stack is 000000003ab1c4a5..00000000494d8b12)
[...]
Call Trace:
__find_rr_leaf+0x99/0x230
fib6_table_lookup+0x13b/0x2d0
ip6_pol_route+0xa4/0x400
fib6_rule_lookup+0x156/0x240
ip6_route_output_flags+0xc6/0x150
__nf_ip6_route+0x23/0x50
synproxy_send_tcp_ipv6+0x106/0x200
synproxy_send_client_synack_ipv6+0x1aa/0x1f0
nft_synproxy_do_eval+0x263/0x310
nft_do_chain+0x5a8/0x5f0 [nf_tables
nft_do_chain_inet+0x98/0x110
nf_hook_slow+0x43/0xc0
__ip6_local_out+0xf0/0x170
ip6_local_out+0x17/0x70
synproxy_send_tcp_ipv6+0x1a2/0x200
synproxy_send_client_synack_ipv6+0x1aa/0x1f0
[...]
Implement objref and objrefmap expression validate functions.
Currently, only NFT_OBJECT_SYNPROXY object type requires validation.
This will also handle a jump to a chain using a synproxy object from the
OUTPUT hook.
Now when trying to reference a synproxy object in the OUTPUT hook, nft
will produce the following error:
synproxy_crash.nft: Error: Could not process rule: Operation not supported
synproxy name mysynproxy
^^^^^^^^^^^^^^^^^^^^^^^^
Fixes:
|
||
|---|---|---|
| .. | ||
| ipset | ||
| ipvs | ||
| Kconfig | ||
| Makefile | ||
| core.c | ||
| nf_bpf_link.c | ||
| nf_conncount.c | ||
| nf_conntrack_acct.c | ||
| nf_conntrack_amanda.c | ||
| nf_conntrack_bpf.c | ||
| nf_conntrack_broadcast.c | ||
| nf_conntrack_core.c | ||
| nf_conntrack_ecache.c | ||
| nf_conntrack_expect.c | ||
| nf_conntrack_extend.c | ||
| nf_conntrack_ftp.c | ||
| nf_conntrack_h323_asn1.c | ||
| nf_conntrack_h323_main.c | ||
| nf_conntrack_h323_types.c | ||
| nf_conntrack_helper.c | ||
| nf_conntrack_irc.c | ||
| nf_conntrack_labels.c | ||
| nf_conntrack_netbios_ns.c | ||
| nf_conntrack_netlink.c | ||
| nf_conntrack_ovs.c | ||
| nf_conntrack_pptp.c | ||
| nf_conntrack_proto.c | ||
| nf_conntrack_proto_generic.c | ||
| nf_conntrack_proto_gre.c | ||
| nf_conntrack_proto_icmp.c | ||
| nf_conntrack_proto_icmpv6.c | ||
| nf_conntrack_proto_sctp.c | ||
| nf_conntrack_proto_tcp.c | ||
| nf_conntrack_proto_udp.c | ||
| nf_conntrack_sane.c | ||
| nf_conntrack_seqadj.c | ||
| nf_conntrack_sip.c | ||
| nf_conntrack_snmp.c | ||
| nf_conntrack_standalone.c | ||
| nf_conntrack_tftp.c | ||
| nf_conntrack_timeout.c | ||
| nf_conntrack_timestamp.c | ||
| nf_dup_netdev.c | ||
| nf_flow_table_bpf.c | ||
| nf_flow_table_core.c | ||
| nf_flow_table_inet.c | ||
| nf_flow_table_ip.c | ||
| nf_flow_table_offload.c | ||
| nf_flow_table_procfs.c | ||
| nf_flow_table_xdp.c | ||
| nf_hooks_lwtunnel.c | ||
| nf_internals.h | ||
| nf_log.c | ||
| nf_log_syslog.c | ||
| nf_nat_amanda.c | ||
| nf_nat_bpf.c | ||
| nf_nat_core.c | ||
| nf_nat_ftp.c | ||
| nf_nat_helper.c | ||
| nf_nat_irc.c | ||
| nf_nat_masquerade.c | ||
| nf_nat_ovs.c | ||
| nf_nat_proto.c | ||
| nf_nat_redirect.c | ||
| nf_nat_sip.c | ||
| nf_nat_tftp.c | ||
| nf_queue.c | ||
| nf_sockopt.c | ||
| nf_synproxy_core.c | ||
| nf_tables_api.c | ||
| nf_tables_core.c | ||
| nf_tables_offload.c | ||
| nf_tables_trace.c | ||
| nfnetlink.c | ||
| nfnetlink_acct.c | ||
| nfnetlink_cthelper.c | ||
| nfnetlink_cttimeout.c | ||
| nfnetlink_hook.c | ||
| nfnetlink_log.c | ||
| nfnetlink_osf.c | ||
| nfnetlink_queue.c | ||
| nft_bitwise.c | ||
| nft_byteorder.c | ||
| nft_chain_filter.c | ||
| nft_chain_nat.c | ||
| nft_chain_route.c | ||
| nft_cmp.c | ||
| nft_compat.c | ||
| nft_connlimit.c | ||
| nft_counter.c | ||
| nft_ct.c | ||
| nft_ct_fast.c | ||
| nft_dup_netdev.c | ||
| nft_dynset.c | ||
| nft_exthdr.c | ||
| nft_fib.c | ||
| nft_fib_inet.c | ||
| nft_fib_netdev.c | ||
| nft_flow_offload.c | ||
| nft_fwd_netdev.c | ||
| nft_hash.c | ||
| nft_immediate.c | ||
| nft_inner.c | ||
| nft_last.c | ||
| nft_limit.c | ||
| nft_log.c | ||
| nft_lookup.c | ||
| nft_masq.c | ||
| nft_meta.c | ||
| nft_nat.c | ||
| nft_numgen.c | ||
| nft_objref.c | ||
| nft_osf.c | ||
| nft_payload.c | ||
| nft_queue.c | ||
| nft_quota.c | ||
| nft_range.c | ||
| nft_redir.c | ||
| nft_reject.c | ||
| nft_reject_inet.c | ||
| nft_reject_netdev.c | ||
| nft_rt.c | ||
| nft_set_bitmap.c | ||
| nft_set_hash.c | ||
| nft_set_pipapo.c | ||
| nft_set_pipapo.h | ||
| nft_set_pipapo_avx2.c | ||
| nft_set_pipapo_avx2.h | ||
| nft_set_rbtree.c | ||
| nft_socket.c | ||
| nft_synproxy.c | ||
| nft_tproxy.c | ||
| nft_tunnel.c | ||
| nft_xfrm.c | ||
| utils.c | ||
| x_tables.c | ||
| xt_AUDIT.c | ||
| xt_CHECKSUM.c | ||
| xt_CLASSIFY.c | ||
| xt_CONNSECMARK.c | ||
| xt_CT.c | ||
| xt_DSCP.c | ||
| xt_HL.c | ||
| xt_HMARK.c | ||
| xt_IDLETIMER.c | ||
| xt_LED.c | ||
| xt_LOG.c | ||
| xt_MASQUERADE.c | ||
| xt_NETMAP.c | ||
| xt_NFLOG.c | ||
| xt_NFQUEUE.c | ||
| xt_RATEEST.c | ||
| xt_REDIRECT.c | ||
| xt_SECMARK.c | ||
| xt_TCPMSS.c | ||
| xt_TCPOPTSTRIP.c | ||
| xt_TEE.c | ||
| xt_TPROXY.c | ||
| xt_TRACE.c | ||
| xt_addrtype.c | ||
| xt_bpf.c | ||
| xt_cgroup.c | ||
| xt_cluster.c | ||
| xt_comment.c | ||
| xt_connbytes.c | ||
| xt_connlabel.c | ||
| xt_connlimit.c | ||
| xt_connmark.c | ||
| xt_conntrack.c | ||
| xt_cpu.c | ||
| xt_dccp.c | ||
| xt_devgroup.c | ||
| xt_dscp.c | ||
| xt_ecn.c | ||
| xt_esp.c | ||
| xt_hashlimit.c | ||
| xt_helper.c | ||
| xt_hl.c | ||
| xt_ipcomp.c | ||
| xt_iprange.c | ||
| xt_ipvs.c | ||
| xt_l2tp.c | ||
| xt_length.c | ||
| xt_limit.c | ||
| xt_mac.c | ||
| xt_mark.c | ||
| xt_multiport.c | ||
| xt_nat.c | ||
| xt_nfacct.c | ||
| xt_osf.c | ||
| xt_owner.c | ||
| xt_physdev.c | ||
| xt_pkttype.c | ||
| xt_policy.c | ||
| xt_quota.c | ||
| xt_rateest.c | ||
| xt_realm.c | ||
| xt_recent.c | ||
| xt_repldata.h | ||
| xt_sctp.c | ||
| xt_set.c | ||
| xt_socket.c | ||
| xt_state.c | ||
| xt_statistic.c | ||
| xt_string.c | ||
| xt_tcpmss.c | ||
| xt_tcpudp.c | ||
| xt_time.c | ||
| xt_u32.c | ||