====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc1+ #314 Not tainted ------------------------------------------------------ syz-executor3/5442 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<0000000041e4bad9>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000041e4bad9>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<0000000007969c3e>] 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 tee_tg_destroy+0x61/0xc0 net/netfilter/xt_TEE.c:123 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 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #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:1046 xt_request_find_table_lock+0x28/0xc0 net/netfilter/x_tables.c:1093 get_info+0x154/0x690 net/ipv6/netfilter/ip6_tables.c:989 do_arpt_get_ctl+0x2a9/0xa00 net/ipv4/netfilter/arp_tables.c:1481 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 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 -> #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 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 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-executor3/5442: #0: (rtnl_mutex){+.+.}, at: [<0000000007969c3e>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5442 Comm: syz-executor3 Not tainted 4.16.0-rc1+ #314 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 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453a59 RSP: 002b:00007f03e91ecc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f03e91ed6d4 RCX: 0000000000453a59 RDX: 0000000000000023 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 000000000000000c R09: 0000000000000000 R10: 0000000020282000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000522 R14: 00000000006f7bd0 R15: 0000000000000000 audit: type=1400 audit(1518790237.603:23): avc: denied { set_context_mgr } for pid=5440 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=binder permissive=1 audit: type=1400 audit(1518790238.652:24): avc: denied { dac_read_search } for pid=5556 comm="syz-executor4" capability=2 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 audit: type=1400 audit(1518790238.652:25): avc: denied { write } for pid=5558 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 audit: type=1400 audit(1518790238.653:26): avc: denied { map } for pid=5556 comm="syz-executor4" path="/11/file0/bus" dev="ramfs" ino=14855 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:ramfs_t:s0 tclass=file permissive=1 audit: type=1400 audit(1518790238.778:27): avc: denied { prog_run } for pid=5576 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=bpf permissive=1 Option ' ' to dns_resolver key: bad/missing value netlink: 'syz-executor2': attribute type 21 has an invalid length. audit: type=1400 audit(1518790239.079:28): avc: denied { map } for pid=5675 comm="syz-executor3" path="socket:[15563]" dev="sockfs" ino=15563 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=packet_socket permissive=1 netlink: 'syz-executor2': attribute type 21 has an invalid length. audit: type=1400 audit(1518790239.341:29): avc: denied { map } for pid=5734 comm="syz-executor2" path=2F6D656D66643A64657620202864656C6574656429 dev="tmpfs" ino=15711 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:tmpfs_t:s0 tclass=file permissive=1 binder: 5805:5806 ioctl c0306201 20006fd0 returned -14 netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. audit: type=1400 audit(1518790239.497:30): avc: denied { write } for pid=5779 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(1518790239.512:31): avc: denied { name_bind } for pid=5801 comm="syz-executor5" src=20020 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 binder: BINDER_SET_CONTEXT_MGR already set binder: 5805:5815 ioctl 40046207 0 returned -16 netlink: 8 bytes leftover after parsing attributes in process `syz-executor4'. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl binder: BINDER_SET_CONTEXT_MGR already set binder: 5894:5912 ioctl 40046207 0 returned -16 binder_alloc: binder_alloc_mmap_handler: 5894 20dbd000-20dbe000 already mapped failed -16 binder: release 5894:5912 transaction 4 out, still active binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 4, target dead Protocol error: SET target dimension is over the limit! netlink: 60 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 60 bytes leftover after parsing attributes in process `syz-executor6'. Protocol error: SET target dimension is over the limit! capability: warning: `syz-executor1' uses 32-bit capabilities (legacy support in use) xt_connbytes: Forcing CT accounting to be enabled x_tables: ip_tables: rpfilter match: used from hooks PREROUTING/OUTPUT, but only valid from PREROUTING x_tables: ip_tables: rpfilter match: used from hooks PREROUTING/OUTPUT, but only valid from PREROUTING netlink: 292 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 292 bytes leftover after parsing attributes in process `syz-executor7'. sctp: [Deprecated]: syz-executor2 (pid 6173) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor2 (pid 6185) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead x86/PAT: syz-executor5:6226 map pfn RAM range req write-combining for [mem 0x1a9950000-0x1a9953fff], got write-back x86/PAT: syz-executor5:6233 map pfn RAM range req write-combining for [mem 0x1c1340000-0x1c1343fff], got write-back SELinux: unrecognized netlink message: protocol=0 nlmsg_type=256 sclass=netlink_route_socket pig=6287 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=256 sclass=netlink_route_socket pig=6287 comm=syz-executor3 binder_alloc: binder_alloc_mmap_handler: 6321 20fa2000-20fa3000 already mapped failed -16 device eql entered promiscuous mode binder_alloc: binder_alloc_mmap_handler: 6321 20000000-20002000 already mapped failed -16 netlink: 'syz-executor7': attribute type 1 has an invalid length. IPVS: set_ctl: invalid protocol: 1 0.0.0.0:24827 @@md$h! IPVS: set_ctl: invalid protocol: 1 0.0.0.0:24827 @d$h! SELinux: unrecognized netlink message: protocol=4 nlmsg_type=25 sclass=netlink_tcpdiag_socket pig=6538 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=25 sclass=netlink_tcpdiag_socket pig=6552 comm=syz-executor0 A link change request failed with some changes committed already. Interface syz2 may have been left with an inconsistent configuration, please check. kauditd_printk_skb: 15 callbacks suppressed audit: type=1400 audit(1518790243.208:47): avc: denied { getattr } for pid=6583 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_netfilter_socket permissive=1 A link change request failed with some changes committed already. Interface syz2 may have been left with an inconsistent configuration, please check. binder: 6729:6734 BC_INCREFS_DONE u0000000000000000 no match binder: 6729:6734 BC_INCREFS_DONE u0000000000000000 no match RDS: rds_bind could not find a transport for 172.20.0.170, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 172.20.0.170, load rds_tcp or rds_rdma? mmap: syz-executor3 (6869) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. arp_tables: arptables: counters copy to user failed while replacing table audit: type=1400 audit(1518790244.859:48): avc: denied { map } for pid=6941 comm="syz-executor2" path="/dev/snd/controlC0" dev="devtmpfs" ino=1184 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file permissive=1 tc_ctl_action: received NO action attribs tc_ctl_action: received NO action attribs QAT: Invalid ioctl xt_CT: netfilter: NOTRACK target is deprecated, use CT instead or upgrade iptables QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl NFQUEUE: number of total queues is 0 NFQUEUE: number of total queues is 0 ipt_REJECT: TCP_RESET invalid for non-tcp ip6_tables: ip6tables: counters copy to user failed while replacing table ipt_CLUSTERIP: Please specify destination IP ipt_REJECT: TCP_RESET invalid for non-tcp ip6_tables: ip6tables: counters copy to user failed while replacing table ipt_CLUSTERIP: Please specify destination IP audit: type=1400 audit(1518790245.857:49): avc: denied { net_broadcast } for pid=7255 comm="syz-executor7" 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 openvswitch: netlink: Message has 8 unknown bytes. openvswitch: netlink: Message has 8 unknown bytes. ion_ioctl: ioctl validate failed do_dccp_setsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app do_dccp_setsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app audit: type=1400 audit(1518790246.541:50): avc: denied { map } for pid=7496 comm="syz-executor7" path="/dev/sg0" dev="devtmpfs" ino=9118 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:scsi_generic_device_t:s0 tclass=chr_file permissive=1 syz-executor2 uses obsolete (PF_INET,SOCK_PACKET) netlink: 'syz-executor3': attribute type 1 has an invalid length. binder: undelivered TRANSACTION_COMPLETE binder: undelivered transaction 12, process died. audit: type=1400 audit(1518790246.962:51): avc: denied { map } for pid=7587 comm="syz-executor5" path="/selinux/user" dev="selinuxfs" ino=9 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:security_t:s0 tclass=file permissive=1 binder_alloc: 7587: binder_alloc_buf, no vma binder: 7587:7588 transaction failed 29189/-3, size 0-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=18 sclass=netlink_audit_socket pig=7638 comm=syz-executor1 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=18 sclass=netlink_audit_socket pig=7638 comm=syz-executor1 QAT: Invalid ioctl ALSA: seq fatal error: cannot create timer (-16) binder: 7732:7736 transaction failed 29189/-22, size 48-8 line 2842 xt_CT: You must specify a L4 protocol, and not use inversions on it. binder: 7732:7736 ioctl c0306201 2000b000 returned -14 ALSA: seq fatal error: cannot create timer (-16) binder_alloc: binder_alloc_mmap_handler: 7732 20007000-20008000 already mapped failed -16 QAT: Invalid ioctl binder: 7732:7736 transaction failed 29189/-22, size 48-8 line 2842 binder: 7732:7736 ioctl c0306201 2000b000 returned -14 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189