====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc2+ #326 Not tainted ------------------------------------------------------ syz-executor4/5557 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<00000000fa68119f>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<00000000fa68119f>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000a7117c8e>] 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+0x242/0x380 net/ipv6/netfilter/ip6_tables.c:673 __do_replace+0x7ac/0xa70 net/ipv6/netfilter/ip6_tables.c:1108 do_replace net/ipv6/netfilter/ip6_tables.c:1164 [inline] do_ip6t_set_ctl+0x40f/0x5f0 net/ipv6/netfilter/ip6_tables.c:1686 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x10b/0x130 net/ipv6/ipv6_sockglue.c:927 sctp_setsockopt+0x2b6/0x61d0 net/sctp/socket.c:4104 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_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1560 udp_getsockopt+0x45/0x80 net/ipv4/udp.c:2478 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 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-executor4/5557: #0: (rtnl_mutex){+.+.}, at: [<00000000a7117c8e>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5557 Comm: syz-executor4 Not tainted 4.16.0-rc2+ #326 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+0x194/0x24d 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_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 ip_getsockopt+0x90/0x220 net/ipv4/ip_sockglue.c:1560 udp_getsockopt+0x45/0x80 net/ipv4/udp.c:2478 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 RIP: 0033:0x453de9 RSP: 002b:00007f4e111cfc68 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007f4e111d06d4 RCX: 0000000000453de9 RDX: 0000000000000030 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000072bea0 R08: 0000000020007ffd R09: 0000000000000000 R10: 0000000020008000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000f2 R14: 00000000006f1750 R15: 0000000000000000 audit: type=1400 audit(1519439669.758:21): avc: denied { map } for pid=5573 comm="syz-executor5" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=15455 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 binder: 5643:5650 transaction failed 29189/-22, size 40-8 line 2848 binder_alloc: 5643: binder_alloc_buf, no vma binder: BINDER_SET_CONTEXT_MGR already set binder: 5643:5660 transaction failed 29189/-3, size 40-8 line 2963 binder: 5643:5650 ioctl 40046207 0 returned -16 ipt_CLUSTERIP: ipt_CLUSTERIP is deprecated and it will removed soon, use xt_cluster instead QAT: Invalid ioctl QAT: Invalid ioctl xt_SECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. TCP: request_sock_TCPv6: Possible SYN flooding on port 20006. Sending cookies. Check SNMP counters. xt_SECMARK: target only valid in the 'mangle' or 'security' tables, not 'filter'. binder: 6001:6004 unknown command 0 binder: 6001:6004 ioctl c0306201 200000c0 returned -22 binder: 6001:6019 unknown command 20 binder: 6001:6019 ioctl c0306201 200000c0 returned -22 mmap: syz-executor6 (6061) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. ip6t_srh: unknown srh invflags B59 ip6t_srh: unknown srh invflags B59 QAT: Invalid ioctl QAT: Invalid ioctl xt_connbytes: Forcing CT accounting to be enabled kernel msg: ebtables bug: please report to author: counter_offset != totalcnt kernel msg: ebtables bug: please report to author: counter_offset != totalcnt MPI: mpi too large (16392 bits) kauditd_printk_skb: 28 callbacks suppressed audit: type=1400 audit(1519439673.546:50): avc: denied { prog_load } for pid=6538 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=bpf permissive=1 audit: type=1400 audit(1519439673.830:51): avc: denied { name_connect } for pid=6629 comm="syz-executor5" 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: 6626:6639 ioctl 40046207 0 returned -16 binder: release 6626:6630 transaction 5 out, still active binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 5, target dead audit: type=1400 audit(1519439674.055:52): avc: denied { map } for pid=6711 comm="syz-executor5" path="/45/file0/bus" dev="ramfs" ino=18744 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(1519439674.183:53): avc: denied { setfcap } for pid=6730 comm="syz-executor7" capability=31 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 syz-executor1 uses obsolete (PF_INET,SOCK_PACKET) device eql entered promiscuous mode audit: type=1400 audit(1519439674.315:54): avc: denied { getattr } for pid=6787 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 net_ratelimit: 8 callbacks suppressed syz0: Invalid MTU 0 requested, hw min 68 syz0: Invalid MTU 0 requested, hw min 68 audit: type=1400 audit(1519439674.595:55): avc: denied { prog_run } for pid=6869 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=bpf permissive=1 audit: type=1400 audit(1519439674.709:56): avc: denied { create } for pid=6872 comm="syz-executor4" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unlabeled_t:s0 tclass=key permissive=1 audit: type=1400 audit(1519439674.732:57): avc: denied { dac_override } for pid=6872 comm="syz-executor4" capability=1 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(1519439674.776:58): avc: denied { net_admin } for pid=4170 comm="syz-executor4" capability=12 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(1519439674.809:59): avc: denied { dac_read_search } for pid=6909 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 ipt_CLUSTERIP: no such interface syz ipt_CLUSTERIP: no such interface syz sctp: [Deprecated]: syz-executor5 (pid 7143) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor5 (pid 7153) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'. Cannot find add_set index 0 as target x_tables: ip_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT QAT: Invalid ioctl QAT: Invalid ioctl x_tables: ip_tables: socket match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT xt_connbytes: Forcing CT accounting to be enabled TCP: request_sock_TCP: Possible SYN flooding on port 20014. Sending cookies. Check SNMP counters. x_tables: ip6_tables: eui64 match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT/FORWARD x_tables: ip6_tables: eui64 match: used from hooks INPUT/OUTPUT, but only valid from PREROUTING/INPUT/FORWARD RDS: rds_bind could not find a transport for 255.255.255.255, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 255.255.255.255, load rds_tcp or rds_rdma? encrypted_key: master key parameter 'Όλ™' is invalid encrypted_key: master key parameter 'Όλ™' is invalid xt_connbytes: Forcing CT accounting to be enabled syz-executor5 (8156): /proc/8154/oom_adj is deprecated, please use /proc/8154/oom_score_adj instead.