====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc2+ #324 Not tainted ------------------------------------------------------ syz-executor4/6534 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<0000000052325891>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000052325891>] do_ip_getsockopt+0x1b3/0x2170 net/ipv4/ip_sockglue.c:1329 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<0000000089c8e985>] 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 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2406 ipv6_setsockopt+0xa0/0x130 net/ipv6/ipv6_sockglue.c:917 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_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-executor4/6534: #0: (rtnl_mutex){+.+.}, at: [<0000000089c8e985>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 0 PID: 6534 Comm: syz-executor4 Not tainted 4.16.0-rc2+ #324 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:00007f1c98a51c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000037 RAX: ffffffffffffffda RBX: 00007f1c98a526d4 RCX: 0000000000453de9 RDX: 0000000000000029 RSI: 0000000000000000 RDI: 0000000000000014 RBP: 000000000072bea0 R08: 0000000020000080 R09: 0000000000000000 R10: 0000000020000040 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000000f2 R14: 00000000006f1750 R15: 0000000000000000 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=28005 sclass=netlink_route_socket pig=6600 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=28005 sclass=netlink_route_socket pig=6600 comm=syz-executor7 mmap: syz-executor6 (6693) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. binder: 6700:6712 transaction failed 29189/-22, size 0-0 line 2842 binder: 6700:6720 transaction failed 29189/-22, size 0-0 line 2842 kauditd_printk_skb: 17 callbacks suppressed audit: type=1400 audit(1519356408.826:39): avc: denied { getopt } for pid=6747 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(1519356408.907:40): avc: denied { setuid } for pid=6762 comm="syz-executor3" capability=7 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 binder: 6790:6799 ioctl c0306201 20019fd0 returned -14 binder: 6793:6796 ioctl c0306201 20008fd0 returned -11 binder: 6790:6799 ioctl c0306201 20019fd0 returned -14 audit: type=1400 audit(1519356409.000:41): avc: denied { set_context_mgr } for pid=6793 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=binder permissive=1 device eql entered promiscuous mode binder: BINDER_SET_CONTEXT_MGR already set binder: 6793:6796 ioctl 40046207 0 returned -16 audit: type=1400 audit(1519356409.313:42): avc: denied { create } for pid=6844 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_crypto_socket permissive=1 audit: type=1400 audit(1519356409.392:43): avc: denied { setopt } for pid=6873 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_netfilter_socket permissive=1 audit: type=1400 audit(1519356409.419:44): avc: denied { getopt } for pid=6873 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_netfilter_socket permissive=1 ipt_REJECT: TCP_RESET invalid for non-tcp audit: type=1400 audit(1519356409.484:45): avc: denied { map } for pid=6848 comm="syz-executor1" path="socket:[19485]" dev="sockfs" ino=19485 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=socket permissive=1 ipt_REJECT: TCP_RESET invalid for non-tcp audit: type=1400 audit(1519356409.488:46): avc: denied { map } for pid=6884 comm="syz-executor4" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=18346 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=28265 sclass=netlink_route_socket pig=6991 comm=syz-executor3 audit: type=1400 audit(1519356410.105:47): avc: denied { create } for pid=7158 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_connector_socket permissive=1 device eql entered promiscuous mode audit: type=1400 audit(1519356410.432:48): avc: denied { ipc_lock } for pid=7286 comm="syz-executor5" capability=14 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 QAT: Invalid ioctl QAT: Invalid ioctl x_tables: ip6_tables: TCPMSS target: only valid for protocol 6 x_tables: ip6_tables: TCPMSS target: only valid for protocol 6 device eql entered promiscuous mode xt_connbytes: Forcing CT accounting to be enabled ipt_REJECT: ECHOREPLY no longer supported. ipt_REJECT: ECHOREPLY no longer supported. ipt_ECN: cannot use TCP operations on a non-tcp rule ipt_ECN: cannot use TCP operations on a non-tcp rule kernel msg: ebtables bug: please report to author: bad policy SELinux: ebitmap: map size 0 does not match my size 64 (high bit was 0) SELinux: failed to load policy kernel msg: ebtables bug: please report to author: bad policy SELinux: policydb string SE Lin does not match my string SE Linux SELinux: failed to load policy xt_CT: You must specify a L4 protocol, and not use inversions on it. xt_connbytes: Forcing CT accounting to be enabled device eql entered promiscuous mode TCP: request_sock_TCPv6: Possible SYN flooding on port 20018. Sending cookies. Check SNMP counters. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=10257 sclass=netlink_route_socket pig=7989 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=10257 sclass=netlink_route_socket pig=7996 comm=syz-executor3 SELinux: failed to load policy TCP: request_sock_TCPv6: Possible SYN flooding on port 20026. Sending cookies. Check SNMP counters. kauditd_printk_skb: 10 callbacks suppressed audit: type=1400 audit(1519356413.957:59): avc: denied { ioctl } for pid=8433 comm="syz-executor7" path="socket:[24589]" dev="sockfs" ino=24589 ioctlcmd=0x8934 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 QAT: Invalid ioctl QAT: Invalid ioctl binder: 8559:8564 ioctl c0105303 20000000 returned -22 QAT: Invalid ioctl binder: 8559:8564 ioctl 541c 20000040 returned -22 QAT: Invalid ioctl binder_alloc: 8559: binder_alloc_buf, no vma QAT: Invalid ioctl binder: 8559:8579 transaction failed 29189/-3, size 80-16 line 2957 audit: type=1400 audit(1519356414.448:60): avc: denied { call } for pid=8559 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=binder permissive=1 binder: 8559:8564 DecRefs 0 refcount change on invalid ref 2 ret -22 audit: type=1400 audit(1519356414.487:61): avc: denied { attach_queue } for pid=8601 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=tun_socket permissive=1 binder: 8606:8609 ioctl c0306201 20cf7000 returned -14 binder: 8559:8611 ioctl c0105303 20000000 returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 8559:8579 ioctl 541c 20000040 returned -22 binder: 8559:8611 DecRefs 0 refcount change on invalid ref 2 ret -22 binder: 8559:8564 ioctl 40046207 0 returned -16 binder_alloc: 8559: binder_alloc_buf, no vma binder: 8606:8615 ioctl c0306201 20cf7000 returned -14 binder: 8559:8579 transaction failed 29189/-3, size 80-16 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 syz-executor1 (8625) used greatest stack depth: 15664 bytes left sg_write: data in/out 67144954/82 bytes for SCSI command 0x67-- guessing data in; program syz-executor5 not setting count and/or reply_len properly QAT: Invalid ioctl rpcbind: RPC call returned error 22 kvm: vcpu 0: requested 68374 ns lapic timer period limited to 500000 ns rpcbind: RPC call returned error 22 kvm: vcpu 0: requested 68374 ns lapic timer period limited to 500000 ns QAT: Invalid ioctl audit: type=1400 audit(1519356417.190:62): avc: denied { accept } for pid=9253 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 netlink: 'syz-executor3': attribute type 1 has an invalid length. netlink: 'syz-executor3': attribute type 1 has an invalid length.