====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #221 Not tainted ------------------------------------------------------ syz-executor1/5578 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<00000000367fea16>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<00000000367fea16>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 xt_CT: You must specify a L4 protocol, and not use inversions on it. but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000000067f995>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (rtnl_mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 unregister_netdevice_notifier+0x91/0x4e0 net/core/dev.c:1673 clusterip_config_entry_put net/ipv4/netfilter/ipt_CLUSTERIP.c:114 [inline] clusterip_tg_destroy+0x389/0x6e0 net/ipv4/netfilter/ipt_CLUSTERIP.c:518 cleanup_entry+0x218/0x350 net/ipv4/netfilter/ip_tables.c:654 __do_replace+0x79d/0xa50 net/ipv4/netfilter/ip_tables.c:1089 do_replace net/ipv4/netfilter/ip_tables.c:1145 [inline] do_ipt_set_ctl+0x40f/0x5f0 net/ipv4/netfilter/ip_tables.c:1675 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0x97/0xa0 net/ipv4/ip_sockglue.c:1259 tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2905 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #1 (&xt[i].mutex){+.+.}: __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1a80 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1041 xt_request_find_table_lock+0x28/0xc0 net/netfilter/x_tables.c:1088 get_info+0x154/0x690 net/ipv6/netfilter/ip6_tables.c:989 do_ipt_get_ctl+0x159/0xac0 net/ipv4/netfilter/ip_tables.c:1699 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122 ip_getsockopt+0x15c/0x220 net/ipv4/ip_sockglue.c:1571 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3359 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2934 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #0 (sk_lock-AF_INET){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 lock_sock_nested+0xc2/0x110 net/core/sock.c:2777 lock_sock include/net/sock.h:1463 [inline] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xa0 net/ipv4/ip_sockglue.c:1252 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 other info that might help us debug this: Chain exists of: sk_lock-AF_INET --> &xt[i].mutex --> rtnl_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(&xt[i].mutex); lock(rtnl_mutex); lock(sk_lock-AF_INET); *** DEADLOCK *** 1 lock held by syz-executor1/5578: #0: (rtnl_mutex){+.+.}, at: [<000000000067f995>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 0 PID: 5578 Comm: syz-executor1 Not tainted 4.15.0+ #221 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:53 print_circular_bug.isra.38+0x2cd/0x2dc kernel/locking/lockdep.c:1223 check_prev_add kernel/locking/lockdep.c:1863 [inline] check_prevs_add kernel/locking/lockdep.c:1976 [inline] validate_chain kernel/locking/lockdep.c:2417 [inline] __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3431 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 lock_sock_nested+0xc2/0x110 net/core/sock.c:2777 lock_sock include/net/sock.h:1463 [inline] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xa0 net/ipv4/ip_sockglue.c:1252 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2975 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f833db25c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 000000000000002a RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000000000b R08: 0000000000000090 R09: 0000000000000000 R10: 0000000020b03f70 R11: 0000000000000212 R12: 00000000006ef1a8 R13: 00000000ffffffff R14: 00007f833db266d4 R15: 0000000000000000 netlink: 'syz-executor7': attribute type 4 has an invalid length. netlink: 'syz-executor7': attribute type 4 has an invalid length. syz-executor6 uses obsolete (PF_INET,SOCK_PACKET) sctp: [Deprecated]: syz-executor3 (pid 5664) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor3 (pid 5664) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' netlink: 'syz-executor4': attribute type 1 has an invalid length. device syz2 entered promiscuous mode netlink: 'syz-executor4': attribute type 1 has an invalid length. device syz2 left promiscuous mode syz4: Invalid MTU -2 requested, hw min 68 syz4: Invalid MTU -2 requested, hw min 68 xt_l2tp: missing protocol rule (udp|l2tpip) xt_l2tp: missing protocol rule (udp|l2tpip) xt_CT: netfilter: NOTRACK target is deprecated, use CT instead or upgrade iptables xt_SECMARK: target only valid in the 'mangle' or 'security' tables, not 'raw'. xt_SECMARK: target only valid in the 'mangle' or 'security' tables, not 'raw'. syz-executor5 (5892) used greatest stack depth: 13552 bytes left xt_CT: You must specify a L4 protocol, and not use inversions on it. xt_CT: You must specify a L4 protocol, and not use inversions on it. dccp_xmit_packet: Payload too large (65423) for featneg. dccp_xmit_packet: Payload too large (65423) for featneg. dccp_close: ABORT with 65423 bytes unread sctp: [Deprecated]: syz-executor5 (pid 6204) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor5 (pid 6204) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 12 bytes leftover after parsing attributes in process `syz-executor1'. ieee80211 phy4: Selected rate control algorithm 'minstrel_ht' netlink: 12 bytes leftover after parsing attributes in process `syz-executor1'. ieee80211 phy5: Selected rate control algorithm 'minstrel_ht' device syz0 entered promiscuous mode device syz0 left promiscuous mode device syz0 entered promiscuous mode device syz0 left promiscuous mode sctp: [Deprecated]: syz-executor1 (pid 6413) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor1 (pid 6413) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead ieee80211 phy6: Selected rate control algorithm 'minstrel_ht' ieee80211 phy7: Selected rate control algorithm 'minstrel_ht' raw_sendmsg: syz-executor4 forgot to set AF_INET. Fix it! ip6t_REJECT: TCP_RESET illegal for non-tcp ip6t_REJECT: TCP_RESET illegal for non-tcp netlink: 24 bytes leftover after parsing attributes in process `syz-executor3'. ip_tunnel: non-ECT from 0.0.0.0 with TOS=0x3 netlink: 24 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 'syz-executor2': attribute type 3 has an invalid length. kauditd_printk_skb: 21 callbacks suppressed audit: type=1400 audit(1517990215.330:43): avc: denied { getattr } for pid=6958 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 netlink: 'syz-executor2': attribute type 3 has an invalid length. audit: type=1400 audit(1517990215.519:44): avc: denied { map } for pid=7023 comm="syz-executor4" path="socket:[16352]" dev="sockfs" ino=16352 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=udp_socket permissive=1 TCP: request_sock_TCPv6: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. mip6: mip6_destopt_init_state: spi is not 0: 3808690176 ipt_CLUSTERIP: ipt_CLUSTERIP is deprecated and it will removed soon, use xt_cluster instead xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. xt_CONNSECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. mip6: mip6_destopt_init_state: spi is not 0: 3808690176 audit: type=1400 audit(1517990215.975:45): avc: denied { ioctl } for pid=7222 comm="syz-executor2" path="socket:[17018]" dev="sockfs" ino=17018 ioctlcmd=0x89e2 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=sock_file permissive=1 IPVS: ftp: loaded support on port[0] = 21 audit: type=1400 audit(1517990216.007:46): avc: denied { setopt } for pid=7222 comm="syz-executor2" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unlabeled_t:s0 tclass=socket permissive=1 IPVS: ftp: loaded support on port[0] = 21 netlink: 'syz-executor6': attribute type 16 has an invalid length. netlink: 'syz-executor6': attribute type 16 has an invalid length. netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'. net_ratelimit: 1 callbacks suppressed openvswitch: netlink: Either Ethernet header or EtherType is required. netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'. openvswitch: netlink: Either Ethernet header or EtherType is required. TCP: request_sock_TCPv6: Possible SYN flooding on port 20018. Sending cookies. Check SNMP counters. can: request_module (can-proto-6) failed. can: request_module (can-proto-6) failed. netlink: 3 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor0'. sock: sock_set_timeout: `syz-executor0' (pid 7675) tries to set negative timeout audit: type=1400 audit(1517990217.549:47): avc: denied { map } for pid=7699 comm="syz-executor7" path="socket:[17382]" dev="sockfs" ino=17382 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_route_socket permissive=1 openvswitch: netlink: Flow actions attr not present in new flow. ieee80211 phy8: Selected rate control algorithm 'minstrel_ht' openvswitch: netlink: Flow actions attr not present in new flow. ieee80211 phy9: Selected rate control algorithm 'minstrel_ht' netlink: 16 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor5'. audit: type=1400 audit(1517990217.833:48): avc: denied { shutdown } for pid=7796 comm="syz-executor3" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_generic_socket permissive=1 ipt_CLUSTERIP: bad local_nodes[1] 0 netlink: 16 bytes leftover after parsing attributes in process `syz-executor5'. xt_CT: netfilter: NOTRACK target is deprecated, use CT instead or upgrade iptables xt_CT: netfilter: NOTRACK target is deprecated, use CT instead or upgrade iptables xt_CT: You must specify a L4 protocol, and not use inversions on it. audit: type=1400 audit(1517990218.284:49): avc: denied { shutdown } for pid=7975 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_crypto_socket permissive=1 A link change request failed with some changes committed already. Interface syz5 may have been left with an inconsistent configuration, please check. A link change request failed with some changes committed already. Interface syz5 may have been left with an inconsistent configuration, please check. netlink: 'syz-executor1': attribute type 21 has an invalid length. netlink: 'syz-executor1': attribute type 21 has an invalid length. audit: type=1400 audit(1517990218.895:50): avc: denied { getattr } for pid=8164 comm="syz-executor6" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_crypto_socket permissive=1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=606 sclass=netlink_route_socket pig=8237 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=606 sclass=netlink_route_socket pig=8237 comm=syz-executor5 netlink: 24 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 24 bytes leftover after parsing attributes in process `syz-executor4'. ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP device syz5 entered promiscuous mode xt_CT: You must specify a L4 protocol, and not use inversions on it. device syz5 left promiscuous mode device syz5 entered promiscuous mode xt_CT: You must specify a L4 protocol, and not use inversions on it. audit: type=1400 audit(1517990219.718:51): avc: denied { getattr } for pid=8511 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=netlink_netfilter_socket permissive=1 ieee80211 phy10: Selected rate control algorithm 'minstrel_ht' Cannot find set identified by id 32767 to match ieee80211 phy11: Selected rate control algorithm 'minstrel_ht' Cannot find set identified by id 32767 to match device lo entered promiscuous mode netlink: 'syz-executor4': attribute type 21 has an invalid length. netlink: 'syz-executor4': attribute type 1 has an invalid length. netlink: 'syz-executor4': attribute type 21 has an invalid length. netlink: 'syz-executor4': attribute type 1 has an invalid length. netlink: 'syz-executor1': attribute type 18 has an invalid length. netlink: 'syz-executor1': attribute type 18 has an invalid length. sctp: [Deprecated]: syz-executor7 (pid 8999) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 sctp: [Deprecated]: syz-executor7 (pid 9014) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead IPv4: Oversized IP packet from 127.0.0.1 sctp: [Deprecated]: syz-executor4 (pid 9043) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead