====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #221 Not tainted ------------------------------------------------------ syz-executor6/5649 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<0000000062262afa>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000062262afa>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000000704279d>] 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 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:870 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-executor6/5649: #0: (rtnl_mutex){+.+.}, at: [<000000000704279d>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5649 Comm: syz-executor6 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 raw_setsockopt+0xb7/0xd0 net/ipv4/raw.c:870 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:00007f76c22e3c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000005 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00000000000005c9 R08: 0000000000000004 R09: 0000000000000000 R10: 000000002068fffc R11: 0000000000000212 R12: 00000000006f7b78 R13: 00000000ffffffff R14: 00007f76c22e46d4 R15: 0000000000000000 ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP dccp_close: ABORT with 4294967275 bytes unread syz-executor2 uses obsolete (PF_INET,SOCK_PACKET) openvswitch: netlink: Flow set message rejected, Key attribute missing. netlink: 'syz-executor3': attribute type 10 has an invalid length. netlink: 'syz-executor3': attribute type 10 has an invalid length. ipt_CLUSTERIP: bad local_nodes[1] 0 ip_tunnel: non-ECT from 0.0.0.0 with TOS=0x3 ipt_CLUSTERIP: bad local_nodes[1] 0 ip_tunnel: non-ECT from 0.0.0.0 with TOS=0x3 RDS: rds_bind could not find a transport for 224.0.0.2, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 224.0.0.2, load rds_tcp or rds_rdma? ipt_ECN: unsupported ECN operation 1f ipt_ECN: unsupported ECN operation 1f netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 13 has an invalid length. netlink: 'syz-executor6': attribute type 13 has an invalid length. kauditd_printk_skb: 12 callbacks suppressed audit: type=1400 audit(1517996181.161:34): avc: denied { setopt } for pid=6665 comm="syz-executor6" 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(1517996181.167:35): avc: denied { read } for pid=6665 comm="syz-executor6" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unlabeled_t:s0 tclass=socket permissive=1 TCP: request_sock_TCPv6: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. audit: type=1400 audit(1517996181.298:36): avc: denied { map } for pid=6708 comm="syz-executor0" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=16444 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 Cannot find add_set index 0 as target Cannot find add_set index 0 as target sctp: [Deprecated]: syz-executor7 (pid 6801) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead xt_TCPMSS: Only works on TCP SYN packets xt_TCPMSS: Only works on TCP SYN packets sctp: [Deprecated]: syz-executor7 (pid 6818) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead openvswitch: netlink: Flow key attr not present in new flow. syz-executor4 (6803) used greatest stack depth: 14704 bytes left audit: type=1400 audit(1517996181.684:37): avc: denied { setopt } for pid=6830 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 openvswitch: netlink: Flow key attr not present in new flow. sctp: [Deprecated]: syz-executor3 (pid 6872) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead SELinux: unrecognized netlink message: protocol=9 nlmsg_type=17 sclass=netlink_audit_socket pig=6873 comm=syz-executor6 sctp: [Deprecated]: syz-executor3 (pid 6882) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead SELinux: unrecognized netlink message: protocol=9 nlmsg_type=17 sclass=netlink_audit_socket pig=6889 comm=syz-executor6 netlink: 16 bytes leftover after parsing attributes in process `syz-executor5'. tc_dump_action: action bad kind syz-executor1 (6937) used greatest stack depth: 12720 bytes left audit: type=1400 audit(1517996181.994:38): avc: denied { setopt } for pid=6954 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 audit: type=1400 audit(1517996181.995:39): avc: denied { accept } for pid=6954 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 audit: type=1400 audit(1517996181.996:40): avc: denied { getopt } for pid=6954 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 sctp: [Deprecated]: syz-executor3 (pid 6980) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor3 (pid 6980) Use of int in max_burst socket option. Use struct sctp_assoc_value instead audit: type=1400 audit(1517996182.221:41): avc: denied { getopt } for pid=7034 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_crypto_socket permissive=1 sctp: [Deprecated]: syz-executor5 (pid 7037) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead audit: type=1400 audit(1517996182.261:42): avc: denied { write } for pid=7034 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_crypto_socket permissive=1 sctp: [Deprecated]: syz-executor5 (pid 7037) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead audit: type=1400 audit(1517996182.269:43): avc: denied { accept } for pid=7034 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_crypto_socket permissive=1 netlink: 'syz-executor7': attribute type 21 has an invalid length. netlink: 'syz-executor7': attribute type 5 has an invalid length. netlink: 11 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor3'. ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' xt_l2tp: unknown flags: 5a xt_l2tp: unknown flags: 5a netlink: 'syz-executor4': attribute type 21 has an invalid length. sctp: [Deprecated]: syz-executor6 (pid 7690) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor6 (pid 7702) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sock: sock_set_timeout: `syz-executor0' (pid 7714) tries to set negative timeout sock: sock_set_timeout: `syz-executor0' (pid 7727) tries to set negative timeout Cannot find set identified by id 0 to match Cannot find set identified by id 0 to match sctp: [Deprecated]: syz-executor5 (pid 7955) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor5 (pid 7964) Use of int in max_burst socket option. Use struct sctp_assoc_value instead do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 TCP: request_sock_TCP: Possible SYN flooding on port 20010. Sending cookies. Check SNMP counters. netlink: 188 bytes leftover after parsing attributes in process `syz-executor7'. openvswitch: netlink: Flow set message rejected, Key attribute missing. netlink: 188 bytes leftover after parsing attributes in process `syz-executor7'. openvswitch: netlink: Flow set message rejected, Key attribute missing. kauditd_printk_skb: 8 callbacks suppressed audit: type=1400 audit(1517996186.190:52): avc: denied { map } for pid=8508 comm="syz-executor0" path="socket:[19869]" dev="sockfs" ino=19869 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 audit: type=1400 audit(1517996186.552:53): avc: denied { create } for pid=8634 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_rdma_socket permissive=1 xt_SECMARK: invalid mode: 0 xt_SECMARK: invalid mode: 0 audit: type=1400 audit(1517996186.918:54): avc: denied { getopt } for pid=8765 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unlabeled_t:s0 tclass=socket permissive=1 can: request_module (can-proto-0) failed. can: request_module (can-proto-0) failed. netlink: 'syz-executor4': attribute type 1 has an invalid length. dccp_close: ABORT with 65423 bytes unread netlink: 'syz-executor4': attribute type 1 has an invalid length.