====================================================== WARNING: possible circular locking dependency detected 4.15.0-rc9+ #213 Not tainted ------------------------------------------------------ syz-executor2/5241 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<0000000088f0fbf6>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000088f0fbf6>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1335 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000f554af89>] 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: -> #1 (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 register_netdevice_notifier+0xad/0x860 net/core/dev.c:1607 clusterip_config_init net/ipv4/netfilter/ipt_CLUSTERIP.c:261 [inline] clusterip_tg_check+0xeb9/0x1570 net/ipv4/netfilter/ipt_CLUSTERIP.c:478 xt_check_target+0x22c/0x7d0 net/netfilter/x_tables.c:845 check_target net/ipv4/netfilter/ip_tables.c:518 [inline] find_check_entry.isra.8+0x8c8/0xcb0 net/ipv4/netfilter/ip_tables.c:559 translate_table+0xed1/0x1610 net/ipv4/netfilter/ip_tables.c:730 do_replace net/ipv4/netfilter/ip_tables.c:1146 [inline] do_ipt_set_ctl+0x370/0x5f0 net/ipv4/netfilter/ip_tables.c:1680 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ip_setsockopt+0xa1/0xb0 net/ipv4/ip_sockglue.c:1260 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:870 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #0 (sk_lock-AF_INET){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 lock_sock_nested+0xc2/0x110 net/core/sock.c:2780 lock_sock include/net/sock.h:1463 [inline] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1335 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1566 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3326 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2937 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 entry_SYSCALL_64_fastpath+0x29/0xa0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); *** DEADLOCK *** 1 lock held by syz-executor2/5241: #0: (rtnl_mutex){+.+.}, at: [<00000000f554af89>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5241 Comm: syz-executor2 Not tainted 4.15.0-rc9+ #213 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.37+0x2cd/0x2dc kernel/locking/lockdep.c:1218 check_prev_add kernel/locking/lockdep.c:1858 [inline] check_prevs_add kernel/locking/lockdep.c:1971 [inline] validate_chain kernel/locking/lockdep.c:2412 [inline] __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3426 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 lock_sock_nested+0xc2/0x110 net/core/sock.c:2780 lock_sock include/net/sock.h:1463 [inline] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1335 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1566 tcp_getsockopt+0x82/0xd0 net/ipv4/tcp.c:3326 sock_common_getsockopt+0x95/0xd0 net/core/sock.c:2937 SYSC_getsockopt net/socket.c:1880 [inline] SyS_getsockopt+0x178/0x340 net/socket.c:1862 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007f6af15afc58 EFLAGS: 00000212 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 000000000071bf58 RCX: 0000000000453299 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00000000000005d0 R08: 0000000020005ffc R09: 0000000000000000 R10: 0000000020000000 R11: 0000000000000212 R12: 00000000006f7c20 R13: 00000000ffffffff R14: 00007f6af15b06d4 R15: 0000000000000008 netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'. openvswitch: netlink: Message has 4 unknown bytes. openvswitch: netlink: Message has 4 unknown bytes. netlink: 'syz-executor0': attribute type 1 has an invalid length. netlink: 'syz-executor0': attribute type 1 has an invalid length. sock: sock_set_timeout: `syz-executor6' (pid 5673) tries to set negative timeout raw_sendmsg: syz-executor7 forgot to set AF_INET. Fix it! sctp: [Deprecated]: syz-executor5 (pid 5707) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor5 (pid 5707) Use of int in maxseg socket option. Use struct sctp_assoc_value instead netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. xt_HMARK: hash modulus can't be zero xt_HMARK: hash modulus can't be zero sctp: [Deprecated]: syz-executor5 (pid 5994) Use of int in maxseg socket option. Use struct sctp_assoc_value instead can: request_module (can-proto-4) failed. can: request_module (can-proto-4) failed. sctp: [Deprecated]: syz-executor5 (pid 6007) Use of int in maxseg socket option. Use struct sctp_assoc_value instead netlink: 17 bytes leftover after parsing attributes in process `syz-executor2'. Protocol error: SET target dimension is over the limit! ipt_REJECT: TCP_RESET invalid for non-tcp ipt_REJECT: TCP_RESET invalid for non-tcp kauditd_printk_skb: 18 callbacks suppressed audit: type=1400 audit(1517172092.674:40): avc: denied { map } for pid=6093 comm="syz-executor0" path="socket:[14773]" dev="sockfs" ino=14773 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=tcp_socket permissive=1 xt_l2tp: invalid flags combination: 0 xt_l2tp: invalid flags combination: 0 Cannot find set identified by id 0 to match Cannot find set identified by id 0 to match netlink: 'syz-executor0': attribute type 11 has an invalid length. audit: type=1400 audit(1517172092.996:41): avc: denied { bind } for pid=6194 comm="syz-executor2" 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 SELinux: unrecognized netlink message: protocol=6 nlmsg_type=1025 sclass=netlink_xfrm_socket pig=6252 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=6 nlmsg_type=1025 sclass=netlink_xfrm_socket pig=6270 comm=syz-executor3 audit: type=1400 audit(1517172093.196:42): avc: denied { create } for pid=6275 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_fib_lookup_socket permissive=1 audit: type=1400 audit(1517172093.198:43): avc: denied { write } for pid=6275 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_fib_lookup_socket permissive=1 audit: type=1400 audit(1517172093.198:44): avc: denied { read } for pid=6275 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_fib_lookup_socket permissive=1 ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' xt_CT: You must specify a L4 protocol, and not use inversions on it. RDS: rds_bind could not find a transport for 172.20.0.170, load rds_tcp or rds_rdma? xt_CT: You must specify a L4 protocol, and not use inversions on it. RDS: rds_bind could not find a transport for 172.20.0.170, load rds_tcp or rds_rdma? netlink: 'syz-executor4': attribute type 16 has an invalid length. bridge: RTM_NEWNEIGH with invalid state 0x0 bridge: RTM_NEWNEIGH with invalid state 0x0 IPv6: RTM_NEWROUTE with no NLM_F_CREATE or NLM_F_REPLACE IPv6: NLM_F_CREATE should be set when creating new route IPv6: NLM_F_CREATE should be set when creating new route IPv6: RTM_NEWROUTE with no NLM_F_CREATE or NLM_F_REPLACE insert transport fail, errno -17 sctp: [Deprecated]: syz-executor5 (pid 6718) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor4 (pid 6736) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 'syz-executor7': attribute type 1 has an invalid length. sctp: [Deprecated]: syz-executor5 (pid 6763) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor4 (pid 6767) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead ipt_CLUSTERIP: Please specify destination IP ipt_rpfilter: unknown options encountered ip_tables: iptables: counters copy to user failed while replacing table ipt_rpfilter: unknown options encountered ipt_CLUSTERIP: Please specify destination IP sctp: [Deprecated]: syz-executor5 (pid 6998) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor5 (pid 7018) Use of int in maxseg socket option. Use struct sctp_assoc_value instead dccp_close: ABORT with 254 bytes unread netlink: 'syz-executor4': attribute type 1 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. bpf: check failed: parse error bpf: check failed: parse error syz-executor2 (7176) used greatest stack depth: 11792 bytes left audit: type=1400 audit(1517172095.971:45): avc: denied { map } for pid=7243 comm="syz-executor0" path="socket:[17709]" dev="sockfs" ino=17709 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=socket permissive=1 netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. sctp: [Deprecated]: syz-executor3 (pid 7368) Use of int in maxseg socket option. Use struct sctp_assoc_value instead xt_TPROXY: Can be used only in combination with either -p tcp or -p udp ip_tables: iptables: counters copy to user failed while replacing table xt_TPROXY: Can be used only in combination with either -p tcp or -p udp sctp: [Deprecated]: syz-executor3 (pid 7373) Use of int in maxseg socket option. Use struct sctp_assoc_value instead audit: type=1400 audit(1517172096.333:46): avc: denied { getattr } for pid=7352 comm="syz-executor5" 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 netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor5'. audit: type=1400 audit(1517172096.584:47): avc: denied { create } for pid=7459 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_rdma_socket permissive=1 netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. x_tables: ip_tables: .0 target: invalid size 8 (kernel) != (user) 3 can: request_module (can-proto-0) failed. x_tables: ip_tables: .0 target: invalid size 8 (kernel) != (user) 3 device syz0 entered promiscuous mode device syz0 left promiscuous mode TCP: request_sock_TCP: Possible SYN flooding on port 20029. Sending cookies. Check SNMP counters. 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. NFQUEUE: number of queues (8) out of range (got 65542) NFQUEUE: number of queues (8) out of range (got 65542) netlink: 300 bytes leftover after parsing attributes in process `syz-executor3'. audit: type=1400 audit(1517172098.337:48): avc: denied { accept } for pid=8121 comm="syz-executor7" 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 netlink: 300 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor2'. TCP: request_sock_TCPv6: Possible SYN flooding on port 20030. Sending cookies. Check SNMP counters. device lo entered promiscuous mode netlink: 'syz-executor7': attribute type 21 has an invalid length. Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable x_tables: ip_tables: tcp match: only valid for protocol 6 openvswitch: netlink: Message has 4 unknown bytes. openvswitch: netlink: Message has 4 unknown bytes. device syz6 entered promiscuous mode device syz6 left promiscuous mode dccp_invalid_packet: P.Data Offset(0) too small dccp_invalid_packet: P.Data Offset(0) too small