====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #221 Not tainted ------------------------------------------------------ syz-executor1/5598 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<0000000020073f2f>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000020073f2f>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000147554a2>] 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 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 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-executor1/5598: #0: (rtnl_mutex){+.+.}, at: [<00000000147554a2>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5598 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 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 RIP: 0033:0x453299 RSP: 002b:00007f05c6bc9c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 000000000000002a RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00000000000005d5 R08: 0000000000000090 R09: 0000000000000000 R10: 000000002009ff70 R11: 0000000000000212 R12: 00000000006f7c98 R13: 00000000ffffffff R14: 00007f05c6bca6d4 R15: 0000000000000000 device syz6 entered promiscuous mode device syz6 left promiscuous mode IPv4: Oversized IP packet from 127.0.0.1 netlink: 'syz-executor3': attribute type 3 has an invalid length. netlink: 'syz-executor3': attribute type 3 has an invalid length. xt_AUDIT: Audit type out of range (valid range: 0..2) netlink: 'syz-executor0': attribute type 3 has an invalid length. xt_AUDIT: Audit type out of range (valid range: 0..2) netlink: 'syz-executor0': attribute type 3 has an invalid length. Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. IPv6: Can't replace route, no match found netlink: 3 bytes leftover after parsing attributes in process `syz-executor7'. IPv6: Can't replace route, no match found ipt_CLUSTERIP: Please specify destination IP xt_l2tp: invalid flags combination: 8 device lo entered promiscuous mode netlink: 'syz-executor0': attribute type 21 has an invalid length. IPv6: Can't replace route, no match found DRBG: could not allocate CTR cipher TFM handle: ctr(aes) device syz5 entered promiscuous mode device syz5 left promiscuous mode device syz5 entered promiscuous mode SELinux: unrecognized netlink message: protocol=0 nlmsg_type=4190 sclass=netlink_route_socket pig=6454 comm=syz-executor0 Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6561 comm=syz-executor4 Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable netlink: 'syz-executor0': attribute type 21 has an invalid length. netlink: 'syz-executor0': attribute type 21 has an invalid length. xt_ecn: cannot match TCP bits in rule for non-tcp packets kauditd_printk_skb: 13 callbacks suppressed audit: type=1400 audit(1518003691.635:35): avc: denied { getopt } for pid=6752 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 xt_cgroup: invalid path, errno=-2 IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 audit: type=1400 audit(1518003691.833:36): avc: denied { accept } for pid=6822 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_generic_socket permissive=1 IPv4: Oversized IP packet from 127.0.0.1 TCP: request_sock_TCP: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. audit: type=1400 audit(1518003692.051:37): avc: denied { net_broadcast } for pid=6916 comm="syz-executor6" capability=11 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=cap_userns permissive=1 sctp: [Deprecated]: syz-executor7 (pid 6914) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor7 (pid 6914) Use of int in maxseg socket option. Use struct sctp_assoc_value instead syz-executor1 (6901) used greatest stack depth: 15072 bytes left raw_sendmsg: syz-executor4 forgot to set AF_INET. Fix it! xt_CT: No such timeout policy "syz1" ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' audit: type=1400 audit(1518003692.477:38): avc: denied { write } for pid=7018 comm="syz-executor7" path="socket:[16708]" dev="sockfs" ino=16708 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 audit: type=1400 audit(1518003692.477:39): avc: denied { write } for pid=7018 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unlabeled_t:s0 tclass=socket permissive=1 audit: type=1400 audit(1518003692.478:40): avc: denied { setopt } for pid=7018 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unlabeled_t:s0 tclass=socket permissive=1 ieee80211 phy4: Selected rate control algorithm 'minstrel_ht' netlink: 'syz-executor1': attribute type 3 has an invalid length. dccp_close: ABORT with 2 bytes unread audit: type=1400 audit(1518003692.686:41): avc: denied { map } for pid=7095 comm="syz-executor6" path="socket:[16787]" dev="sockfs" ino=16787 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=47292 sclass=netlink_route_socket pig=7101 comm=syz-executor3 netlink: 'syz-executor1': attribute type 3 has an invalid length. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=260 sclass=netlink_route_socket pig=7116 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=47292 sclass=netlink_route_socket pig=7101 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=260 sclass=netlink_route_socket pig=7127 comm=syz-executor6 netlink: 16 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor5'. xt_LED: No 'id' parameter given. audit: type=1400 audit(1518003693.026:42): avc: denied { setopt } for pid=7192 comm="syz-executor0" 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 audit: type=1400 audit(1518003693.027:43): avc: denied { read } for pid=7192 comm="syz-executor0" 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: 16 bytes leftover after parsing attributes in process `syz-executor0'. xt_LED: No 'id' parameter given. netlink: 16 bytes leftover after parsing attributes in process `syz-executor0'. sit: non-ECT from 0.0.0.0 with TOS=0x2 TCP: request_sock_TCPv6: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. x_tables: ip_tables: icmp match: only valid for protocol 1 IPv4: Oversized IP packet from 127.0.0.1 ipt_ECN: cannot use TCP operations on a non-tcp rule ipt_ECN: cannot use TCP operations on a non-tcp rule audit: type=1400 audit(1518003694.765:44): avc: denied { connect } for pid=7863 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_generic_socket permissive=1 ip_tunnel: non-ECT from 0.0.0.0 with TOS=0x2 ip_tunnel: non-ECT from 0.0.0.0 with TOS=0x2 netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. 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'. sctp: [Deprecated]: syz-executor5 (pid 8324) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead ipt_ECN: cannot use TCP operations on a non-tcp rule sctp: [Deprecated]: syz-executor5 (pid 8324) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead device syz4 entered promiscuous mode device syz4 left promiscuous mode SELinux: unrecognized netlink message: protocol=0 nlmsg_type=222 sclass=netlink_route_socket pig=8385 comm=syz-executor1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=222 sclass=netlink_route_socket pig=8387 comm=syz-executor1 device syz5 left promiscuous mode device syz5 entered promiscuous mode device syz5 left promiscuous mode IPv4: Oversized IP packet from 127.0.0.1 kauditd_printk_skb: 5 callbacks suppressed audit: type=1400 audit(1518003696.680:50): avc: denied { setopt } for pid=8630 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: 'syz-executor0': attribute type 21 has an invalid length. netlink: 'syz-executor0': attribute type 21 has an invalid length. Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! audit: type=1400 audit(1518003697.611:51): avc: denied { map } for pid=9020 comm="syz-executor7" path="socket:[20069]" dev="sockfs" ino=20069 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 ipt_CLUSTERIP: Please specify destination IP netlink: 'syz-executor4': attribute type 16 has an invalid length. netlink: 'syz-executor7': attribute type 13 has an invalid length. netlink: 'syz-executor4': attribute type 29 has an invalid length. netlink: 'syz-executor1': attribute type 29 has an invalid length. netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 'syz-executor4': attribute type 16 has an invalid length. netlink: 'syz-executor7': attribute type 13 has an invalid length. netlink: 'syz-executor4': attribute type 29 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 'syz-executor1': attribute type 29 has an invalid length. netlink: 5 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. sit: non-ECT from 0.0.0.0 with TOS=0x3 ipt_CLUSTERIP: Please specify an interface name ipt_CLUSTERIP: Please specify an interface name