device bridge0 entered promiscuous mode ====================================================== WARNING: possible circular locking dependency detected 4.15.0-rc9+ #215 Not tainted ------------------------------------------------------ syz-executor2/5516 is trying to acquire lock: (&xt[i].mutex){+.+.}, at: [<00000000c096c35a>] xt_find_target+0x44/0x1e0 net/netfilter/x_tables.c:229 but task is already holding lock: (sk_lock-AF_INET6){+.+.}, at: [<00000000ceea0e84>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET6){+.+.}, at: [<00000000ceea0e84>] ipv6_setsockopt+0xff/0x150 net/ipv6/ipv6_sockglue.c:927 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (sk_lock-AF_INET6){+.+.}: lock_sock_nested+0xc2/0x110 net/core/sock.c:2780 lock_sock include/net/sock.h:1463 [inline] do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 ipv6_setsockopt+0xd7/0x150 net/ipv6/ipv6_sockglue.c:922 tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2899 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 -> #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 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:508 cleanup_entry+0x218/0x350 net/ipv4/netfilter/ip_tables.c:659 __do_replace+0x79d/0xa50 net/ipv4/netfilter/ip_tables.c:1094 do_replace net/ipv4/netfilter/ip_tables.c:1150 [inline] do_ipt_set_ctl+0x40f/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 tcp_setsockopt+0x82/0xd0 net/ipv4/tcp.c:2899 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 (&xt[i].mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 __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_target+0x44/0x1e0 net/netfilter/x_tables.c:229 xt_request_find_target+0x2c/0xb0 net/netfilter/x_tables.c:255 find_check_entry.isra.7+0x669/0xcf0 net/ipv6/netfilter/ip6_tables.c:572 translate_table+0xf52/0x1690 net/ipv6/netfilter/ip6_tables.c:749 do_replace net/ipv6/netfilter/ip6_tables.c:1165 [inline] do_ip6t_set_ctl+0x370/0x5f0 net/ipv6/netfilter/ip6_tables.c:1691 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x115/0x150 net/ipv6/ipv6_sockglue.c:928 rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060 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 other info that might help us debug this: Chain exists of: &xt[i].mutex --> rtnl_mutex --> sk_lock-AF_INET6 Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET6); lock(rtnl_mutex); lock(sk_lock-AF_INET6); lock(&xt[i].mutex); *** DEADLOCK *** 1 lock held by syz-executor2/5516: #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000ceea0e84>] lock_sock include/net/sock.h:1463 [inline] #0: (sk_lock-AF_INET6){+.+.}, at: [<00000000ceea0e84>] ipv6_setsockopt+0xff/0x150 net/ipv6/ipv6_sockglue.c:927 stack backtrace: CPU: 0 PID: 5516 Comm: syz-executor2 Not tainted 4.15.0-rc9+ #215 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 __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_target+0x44/0x1e0 net/netfilter/x_tables.c:229 xt_request_find_target+0x2c/0xb0 net/netfilter/x_tables.c:255 find_check_entry.isra.7+0x669/0xcf0 net/ipv6/netfilter/ip6_tables.c:572 translate_table+0xf52/0x1690 net/ipv6/netfilter/ip6_tables.c:749 do_replace net/ipv6/netfilter/ip6_tables.c:1165 [inline] do_ip6t_set_ctl+0x370/0x5f0 net/ipv6/netfilter/ip6_tables.c:1691 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x115/0x150 net/ipv6/ipv6_sockglue.c:928 rawv6_setsockopt+0x4a/0xf0 net/ipv6/raw.c:1060 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 RIP: 0033:0x453299 RSP: 002b:00007f1c9fb31c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000040 RSI: 0000000000000029 RDI: 0000000000000013 RBP: 00000000000005c5 R08: 00000000000004a0 R09: 0000000000000000 R10: 0000000020001b60 R11: 0000000000000212 R12: 00000000006f7b18 R13: 00000000ffffffff R14: 00007f1c9fb326d4 R15: 0000000000000000 xt_SECMARK: invalid mode: 0 device bridge0 left promiscuous mode device bridge0 entered promiscuous mode device bridge0 left promiscuous mode sctp: [Deprecated]: syz-executor5 (pid 5646) Use of int in max_burst socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor5 (pid 5646) Use of int in max_burst socket option. Use struct sctp_assoc_value instead Dead loop on virtual device ip6_vti0, fix it urgently! Dead loop on virtual device ip6_vti0, fix it urgently! xt_limit: Overflow, try lower: 0/0 xt_limit: Overflow, try lower: 0/0 netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'. ipt_REJECT: TCP_RESET invalid for non-tcp netlink: 4 bytes leftover after parsing attributes in process `syz-executor3'. ipt_REJECT: TCP_RESET invalid for non-tcp netlink: 'syz-executor0': attribute type 18 has an invalid length. netlink: 'syz-executor0': attribute type 18 has an invalid length. sock: process `syz-executor5' is using obsolete setsockopt SO_BSDCOMPAT netlink: 'syz-executor1': attribute type 20 has an invalid length. netlink: 'syz-executor1': attribute type 20 has an invalid length. netlink: 4 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 'syz-executor6': attribute type 4 has an invalid length. netlink: 28 bytes leftover after parsing attributes in process `syz-executor6'. insert transport fail, errno -17 ipt_ECN: cannot use TCP operations on a non-tcp rule netlink: 'syz-executor7': attribute type 4 has an invalid length. ipt_ECN: cannot use TCP operations on a non-tcp rule netlink: 'syz-executor1': attribute type 1 has an invalid length. netlink: 'syz-executor1': attribute type 1 has an invalid length. kauditd_printk_skb: 22 callbacks suppressed audit: type=1400 audit(1517265457.147:44): avc: denied { create } for pid=6656 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_scsitransport_socket permissive=1 netlink: 'syz-executor7': attribute type 21 has an invalid length. netlink: 1 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 'syz-executor7': attribute type 21 has an invalid length. audit: type=1400 audit(1517265457.438:45): avc: denied { accept } for pid=6746 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_generic_socket permissive=1 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=72 sclass=netlink_audit_socket pig=6843 comm=syz-executor0 audit: type=1400 audit(1517265457.705:46): avc: denied { map } for pid=6856 comm="syz-executor2" path="pipe:[16779]" dev="pipefs" ino=16779 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=fifo_file permissive=1 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=72 sclass=netlink_audit_socket pig=6843 comm=syz-executor0 IPVS: length: 24 != 8 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=46643 sclass=netlink_route_socket pig=6931 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=46643 sclass=netlink_route_socket pig=6931 comm=syz-executor7 IPVS: length: 24 != 8 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. TCP: request_sock_TCPv6: Possible SYN flooding on port 20026. Sending cookies. Check SNMP counters. audit: type=1400 audit(1517265458.783:47): avc: denied { getattr } for pid=7261 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_netfilter_socket permissive=1 dccp_invalid_packet: P.Data Offset(172) too large nla_parse: 1 callbacks suppressed netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. dccp_invalid_packet: P.Data Offset(172) too large SELinux: unrecognized netlink message: protocol=0 nlmsg_type=52501 sclass=netlink_route_socket pig=7375 comm=syz-executor0 netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=52501 sclass=netlink_route_socket pig=7375 comm=syz-executor0 netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor7'. audit: type=1400 audit(1517265459.590:48): avc: denied { map } for pid=7528 comm="syz-executor4" path="socket:[17839]" dev="sockfs" ino=17839 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 IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. device syz2 entered promiscuous mode netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. device syz2 left promiscuous mode openvswitch: netlink: Flow key attr not present in new flow. openvswitch: netlink: Flow key attr not present in new flow. can: request_module (can-proto-4) failed. can: request_module (can-proto-4) failed. validate_nla: 2 callbacks suppressed netlink: 'syz-executor7': attribute type 12 has an invalid length. netlink: 'syz-executor7': attribute type 12 has an invalid length. syz-executor6 (8024) used greatest stack depth: 12928 bytes left netlink: 2 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor5'. RDS: rds_bind could not find a transport for 172.20.0.187, load rds_tcp or rds_rdma? device lo entered promiscuous mode RDS: rds_bind could not find a transport for 172.20.0.187, load rds_tcp or rds_rdma? audit: type=1400 audit(1517265461.364:49): avc: denied { create } for pid=8099 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_fib_lookup_socket permissive=1 audit: type=1400 audit(1517265461.364:50): avc: denied { write } for pid=8099 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_fib_lookup_socket permissive=1 dccp_close: ABORT with 214 bytes unread audit: type=1400 audit(1517265462.036:51): avc: denied { map } for pid=8339 comm="syz-executor5" path="socket:[18979]" dev="sockfs" ino=18979 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 netlink: 12 bytes leftover after parsing attributes in process `syz-executor4'. audit: type=1400 audit(1517265462.581:52): avc: denied { map } for pid=8541 comm="syz-executor4" path="socket:[19128]" dev="sockfs" ino=19128 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=rawip_socket permissive=1 audit: type=1400 audit(1517265462.757:53): avc: denied { setopt } for pid=8582 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 audit: type=1400 audit(1517265462.931:54): avc: denied { bind } for pid=8649 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_fib_lookup_socket permissive=1 audit: type=1400 audit(1517265462.932:55): avc: denied { getattr } for pid=8649 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_fib_lookup_socket permissive=1