binder: undelivered TRANSACTION_ERROR: 29189 ====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc1+ #315 Not tainted ------------------------------------------------------ syz-executor3/5398 is trying to acquire lock: (sk_lock-AF_INET6){+.+.}, at: [<0000000017a44cc4>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET6){+.+.}, at: [<0000000017a44cc4>] do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<0000000072f785ef>] 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 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 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_ip6t_get_ctl+0x159/0xaf0 net/ipv6/netfilter/ip6_tables.c:1710 nf_sockopt net/netfilter/nf_sockopt.c:104 [inline] nf_getsockopt+0x6a/0xc0 net/netfilter/nf_sockopt.c:122 ipv6_getsockopt+0x1df/0x2e0 net/ipv6/ipv6_sockglue.c:1371 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_INET6){+.+.}: 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_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 ipv6_setsockopt+0xd7/0x130 net/ipv6/ipv6_sockglue.c:922 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 other info that might help us debug this: Chain exists of: sk_lock-AF_INET6 --> &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_INET6); *** DEADLOCK *** 1 lock held by syz-executor3/5398: #0: (rtnl_mutex){+.+.}, at: [<0000000072f785ef>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 0 PID: 5398 Comm: syz-executor3 Not tainted 4.16.0-rc1+ #315 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_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 ipv6_setsockopt+0xd7/0x130 net/ipv6/ipv6_sockglue.c:922 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 RIP: 0033:0x453a59 RSP: 002b:00007fb6be8d3c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007fb6be8d46d4 RCX: 0000000000453a59 RDX: 000000000000002c RSI: 0000000000000029 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000000000108 R09: 0000000000000000 R10: 0000000020c6c000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000506 R14: 00000000006f7930 R15: 0000000000000000 binder: release 5365:5367 transaction 2 out, still active binder: unexpected work type, 4, not freed binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 2, target dead audit: type=1400 audit(1518841177.795:27): avc: denied { create } for pid=5409 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 capability: warning: `syz-executor0' uses 32-bit capabilities (legacy support in use) audit: type=1400 audit(1518841177.831:28): avc: denied { write } for pid=5409 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(1518841177.861:29): avc: denied { map } for pid=5424 comm="syz-executor0" path="/selinux/mls" dev="selinuxfs" ino=12 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:security_t:s0 tclass=file permissive=1 audit: type=1400 audit(1518841177.885:30): avc: denied { prog_load } for pid=5426 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=bpf permissive=1 xt_l2tp: unknown flags: d0 xt_l2tp: missing protocol rule (udp|l2tpip) xt_l2tp: unknown flags: d0 xt_l2tp: missing protocol rule (udp|l2tpip) audit: type=1400 audit(1518841178.041:31): avc: denied { map_create } for pid=5471 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 audit: type=1400 audit(1518841178.070:32): avc: denied { map_read map_write } for pid=5471 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 mmap: syz-executor0 (5570) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. audit: type=1400 audit(1518841178.436:33): avc: denied { create } for pid=5584 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_fib_lookup_socket permissive=1 audit: type=1400 audit(1518841178.436:34): avc: denied { write } for pid=5584 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_fib_lookup_socket permissive=1 audit: type=1400 audit(1518841178.461:35): avc: denied { create } for pid=5590 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 binder: 5631:5634 transaction failed 29201/-22, size -346-479 line 2957 binder_alloc: binder_alloc_mmap_handler: 5631 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 5631:5642 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29201 IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready TCP: request_sock_TCP: Possible SYN flooding on port 20026. Sending cookies. Check SNMP counters. xt_connbytes: Forcing CT accounting to be enabled dccp_invalid_packet: pskb_may_pull failed dccp_invalid_packet: pskb_may_pull failed TCP: request_sock_TCP: Possible SYN flooding on port 20014. Sending cookies. Check SNMP counters. netlink: 'syz-executor0': attribute type 3 has an invalid length. netlink: 'syz-executor0': attribute type 3 has an invalid length. dccp_invalid_packet: P.type (REQUEST) not Data || [Data]Ack, while P.X == 0 dccp_invalid_packet: P.type (REQUEST) not Data || [Data]Ack, while P.X == 0 kauditd_printk_skb: 8 callbacks suppressed audit: type=1400 audit(1518841182.170:44): avc: denied { ipc_lock } for pid=6173 comm="syz-executor2" 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 irq bypass consumer (token 00000000578fbbf3) registration fails: -16 capability: warning: `syz-executor2' uses deprecated v2 capabilities in a way that may be insecure SELinux: unrecognized netlink message: protocol=9 nlmsg_type=22 sclass=netlink_audit_socket pig=6315 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=22 sclass=netlink_audit_socket pig=6325 comm=syz-executor6 audit: type=1400 audit(1518841182.679:45): avc: denied { setopt } for pid=6330 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 QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1400 audit(1518841182.810:46): avc: denied { map } for pid=6365 comm="syz-executor3" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=17674 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 QAT: Invalid ioctl QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6363 comm=syz-executor4 netlink: 40 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor0'. audit: type=1400 audit(1518841183.013:47): avc: denied { setgid } for pid=6406 comm="syz-executor2" capability=6 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(1518841183.040:48): avc: denied { net_admin } for pid=4217 comm="syz-executor7" 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(1518841183.067:49): avc: denied { dac_override } for pid=6409 comm="syz-executor0" 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(1518841183.068:50): avc: denied { write } for pid=6409 comm="syz-executor0" name="net" dev="proc" ino=17814 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=dir permissive=1 audit: type=1400 audit(1518841183.068:51): avc: denied { add_name } for pid=6409 comm="syz-executor0" name="pfkey" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=dir permissive=1 audit: type=1400 audit(1518841183.069:52): avc: denied { create } for pid=6409 comm="syz-executor0" name="pfkey" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:insmod_t:s0 tclass=file permissive=1 audit: type=1400 audit(1518841183.073:53): avc: denied { net_raw } for pid=6406 comm="syz-executor2" capability=13 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 netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor0'. binder: 6529:6534 got transaction with invalid data ptr binder: 6529:6534 transaction failed 29201/-14, size 99-0 line 2976 binder: BINDER_SET_CONTEXT_MGR already set binder: 6529:6550 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29201 kvm: emulating exchange as write xt_CT: No such helper "pptp" xt_CT: No such helper "pptp" SELinux: unrecognized netlink message: protocol=0 nlmsg_type=2054 sclass=netlink_route_socket pig=6660 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=2054 sclass=netlink_route_socket pig=6666 comm=syz-executor7 QAT: Invalid ioctl netlink: 'syz-executor0': attribute type 6 has an invalid length. syz-executor6 uses obsolete (PF_INET,SOCK_PACKET) netlink: 1 bytes leftover after parsing attributes in process `syz-executor0'. QAT: Invalid ioctl netlink: 'syz-executor0': attribute type 6 has an invalid length. netlink: 1 bytes leftover after parsing attributes in process `syz-executor0'. binder: 6841 RLIMIT_NICE not set binder: 6841 RLIMIT_NICE not set binder: BINDER_SET_CONTEXT_MGR already set binder: 6829:6852 ioctl 40046207 0 returned -16 binder: 6841 RLIMIT_NICE not set binder_alloc: 6829: binder_alloc_buf, no vma binder: 6829:6854 transaction failed 29189/-3, size 0-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 6829:6841 transaction 13 in, still active binder: send failed reply for transaction 13 to 6829:6852 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 ip6t_srh: unknown srh invflags FFFE ip6t_srh: unknown srh invflags FFFE IPv6: NLM_F_REPLACE set, but no existing node found! IPv6: NLM_F_REPLACE set, but no existing node found! ip6t_srh: unknown srh invflags FFFE ip6t_srh: unknown srh invflags FFFE QAT: Invalid ioctl semctl(GETNCNT/GETZCNT) is since 3.16 Single Unix Specification compliant. The task syz-executor7 (7148) triggered the difference, watch for misbehavior. QAT: Invalid ioctl xt_hashlimit: overflow, try lower: 0/0 xt_hashlimit: overflow, try lower: 0/0 binder_alloc: binder_alloc_mmap_handler: 7211 20000000-20002000 already mapped failed -16 irq bypass consumer (token 000000001e61d191) registration fails: -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 7211:7220 ioctl 40046207 0 returned -16 binder_alloc: 7211: binder_alloc_buf, no vma binder: 7211:7229 transaction failed 29189/-3, size 0-0 line 2957 encrypted_key: master key parameter 'm¤ªŸÝ‘¸Oû)Ñu(÷p¡Ý뽿¼NèÀ¹-CÁÙ°' is invalid binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_COMPLETE binder: undelivered transaction 16, process died. x_tables: ip_tables: DNAT target: used from hooks INPUT, but only usable from PREROUTING/OUTPUT x_tables: ip_tables: DNAT target: used from hooks INPUT, but only usable from PREROUTING/OUTPUT Cannot find add_set index 0 as target IPVS: ftp: loaded support on port[0] = 21 Cannot find add_set index 0 as target netlink: 'syz-executor0': attribute type 21 has an invalid length. netlink: 'syz-executor0': attribute type 21 has an invalid length.