====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #297 Not tainted ------------------------------------------------------ syz-executor5/21081 is trying to acquire lock: (rtnl_mutex){+.+.}, at: [<000000006d831d6d>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 but task is already holding lock: (&xt[i].mutex){+.+.}, at: [<00000000fe33f573>] xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1041 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #2 (&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:1041 xt_request_find_table_lock+0x28/0xc0 net/netfilter/x_tables.c:1088 get_info+0x154/0x690 net/ipv6/netfilter/ip6_tables.c:989 do_ipt_get_ctl+0x159/0xac0 net/ipv4/netfilter/ip_tables.c:1699 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+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b -> #1 (sk_lock-AF_INET){+.+.}: 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 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+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b -> #0 (rtnl_mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 __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+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b other info that might help us debug this: Chain exists of: rtnl_mutex --> sk_lock-AF_INET --> &xt[i].mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&xt[i].mutex); lock(sk_lock-AF_INET); lock(&xt[i].mutex); lock(rtnl_mutex); *** DEADLOCK *** 1 lock held by syz-executor5/21081: #0: (&xt[i].mutex){+.+.}, at: [<00000000fe33f573>] xt_find_table_lock+0x3e/0x3e0 net/netfilter/x_tables.c:1041 stack backtrace: CPU: 0 PID: 21081 Comm: syz-executor5 Not tainted 4.15.0+ #297 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 __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+0x282/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x26/0x9b RIP: 0033:0x453299 RSP: 002b:00007fc5af48ec58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000014 RBP: 00000000000004d4 R08: 00000000000002e0 R09: 0000000000000000 R10: 0000000020777825 R11: 0000000000000212 R12: 00000000006f6480 R13: 00000000ffffffff R14: 00007fc5af48f6d4 R15: 0000000000000000 ipt_CLUSTERIP: bad local_nodes[1] 0 xt_hashlimit: hashlimit invalid interval xt_hashlimit: hashlimit invalid interval ipt_CLUSTERIP: bad local_nodes[1] 0 xt_l2tp: missing protocol rule (udp|l2tpip) QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl xt_l2tp: missing protocol rule (udp|l2tpip) QAT: Invalid ioctl device eql entered promiscuous mode do_dccp_setsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app do_dccp_setsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app x_tables: ip6_tables: .0 target: invalid size 8 (kernel) != (user) 0 x_tables: ip6_tables: .0 target: invalid size 8 (kernel) != (user) 0 binder: 21724:21731 ERROR: BC_REGISTER_LOOPER called without request binder: 21724:21739 transaction failed 29189/-22, size 0-0 line 2842 binder_alloc: binder_alloc_mmap_handler: 21724 20000000-20002000 already mapped failed -16 binder: 21724:21731 ERROR: BC_REGISTER_LOOPER called without request binder: 21724:21739 transaction failed 29189/-22, size 0-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 binder: 21750:21752 ERROR: BC_REGISTER_LOOPER called without request binder_alloc: 21750: binder_alloc_buf, no vma binder: 21750:21752 transaction failed 29189/-3, size 0-0 line 2957 binder: 21750:21767 got reply transaction with no transaction stack binder: 21750:21767 transaction failed 29201/-71, size 0-16 line 2757 openvswitch: netlink: Flow actions attr not present in new flow. binder: BINDER_SET_CONTEXT_MGR already set binder: 21750:21752 ERROR: BC_REGISTER_LOOPER called without request binder: 21750:21767 ioctl 40046207 0 returned -16 binder_alloc: 21750: binder_alloc_buf, no vma binder: 21750:21782 transaction failed 29189/-3, size 0-0 line 2957 binder: 21752 RLIMIT_NICE not set openvswitch: netlink: Flow actions attr not present in new flow. binder: 21750:21767 got reply transaction with no transaction stack binder: 21750:21767 transaction failed 29201/-71, size 0-16 line 2757 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 QAT: Invalid ioctl QAT: Invalid ioctl xt_TCPMSS: Only works on TCP SYN packets xt_TCPMSS: Only works on TCP SYN packets netlink: 'syz-executor6': attribute type 33 has an invalid length. netlink: 'syz-executor6': attribute type 33 has an invalid length. binder: 22027:22030 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 22027:22030 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0 binder: 22041 RLIMIT_NICE not set binder: 22027:22030 BC_DEAD_BINDER_DONE 0000000000000000 not found binder: 22027:22030 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 22027:22064 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0 binder: 22070 RLIMIT_NICE not set binder: 22027:22064 BC_DEAD_BINDER_DONE 0000000000000000 not found device eql entered promiscuous mode netlink: 'syz-executor7': attribute type 3 has an invalid length. kauditd_printk_skb: 57 callbacks suppressed audit: type=1326 audit(1517835685.195:450): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=22141 comm="syz-executor6" exe="/root/syz-executor6" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 netlink: 'syz-executor7': attribute type 3 has an invalid length. audit: type=1326 audit(1517835685.196:451): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=22141 comm="syz-executor6" exe="/root/syz-executor6" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517835685.248:452): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=22141 comm="syz-executor6" exe="/root/syz-executor6" sig=0 arch=c000003e syscall=2 compat=0 ip=0x40d591 code=0x7ffc0000 audit: type=1400 audit(1517835685.257:453): avc: denied { write } for pid=22131 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_fib_lookup_socket permissive=1 audit: type=1400 audit(1517835685.328:455): avc: denied { sys_chroot } for pid=22167 comm="syz-executor7" capability=18 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=1326 audit(1517835685.326:454): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=22168 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517835685.329:456): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=22168 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=257 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517835685.332:457): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=22168 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517835685.333:458): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=22168 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=2 compat=0 ip=0x40d591 code=0x7ffc0000 audit: type=1326 audit(1517835685.333:459): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=22168 comm="syz-executor3" exe="/root/syz-executor3" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 can: request_module (can-proto-3) failed. can: request_module (can-proto-3) failed. binder: 22331:22333 transaction failed 29189/-22, size 96-16 line 2842 binder: 22331:22348 transaction failed 29189/-22, size 96-16 line 2842 binder: 22460 RLIMIT_NICE not set binder: BINDER_SET_CONTEXT_MGR already set binder: 22459:22472 ioctl 40046207 0 returned -16 binder_alloc: 22459: binder_alloc_buf, no vma binder: 22459:22474 transaction failed 29189/-3, size 0-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_COMPLETE device eql entered promiscuous mode netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. kvm [22578]: vcpu0, guest rIP: 0xfff0 disabled perfctr wrmsr: 0x186 data 0x9 netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. binder_alloc: 22605: binder_alloc_buf, no vma binder: 22605:22607 transaction failed 29189/-3, size 40-8 line 2957 binder_alloc: binder_alloc_mmap_handler: 22605 20000000-20002000 already mapped failed -16 binder: BINDER_SET_CONTEXT_MGR already set binder: 22605:22610 ioctl 40046207 0 returned -16 binder_alloc: 22605: binder_alloc_buf, no vma binder: 22605:22610 got transaction to invalid handle binder: 22605:22607 transaction failed 29189/-3, size 40-8 line 2957 binder: 22605:22610 transaction failed 29201/-22, size 0-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 binder: undelivered TRANSACTION_ERROR: 29189 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=3845 sclass=netlink_route_socket pig=22739 comm=syz-executor3 binder: 22732:22735 ioctl c0306201 20013fd0 returned -14 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=3845 sclass=netlink_route_socket pig=22747 comm=syz-executor3 binder: 22732:22735 BC_CLEAR_DEATH_NOTIFICATION death notification not active binder: 22732:22735 BC_DEAD_BINDER_DONE 0000000000000000 not found binder: 22732:22735 got transaction to invalid handle binder: 22732:22735 transaction failed 29201/-22, size 0-0 line 2842 binder: BINDER_SET_CONTEXT_MGR already set binder: 22732:22748 ioctl 40046207 0 returned -16 binder: 22732:22735 ioctl c0306201 20013fd0 returned -14 binder: 22732:22748 BC_CLEAR_DEATH_NOTIFICATION death notification not active binder: undelivered TRANSACTION_ERROR: 29201 binder: BINDER_SET_CONTEXT_MGR already set binder: 22899:22912 ioctl 40046207 0 returned -16 binder: 22899:22912 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0 QAT: Invalid ioctl QAT: Invalid ioctl binder_alloc: 23176: binder_alloc_buf, no vma binder: 23176:23194 transaction failed 29189/-3, size 0-0 line 2957 binder: BINDER_SET_CONTEXT_MGR already set binder: 23176:23194 ioctl 40046207 0 returned -16 binder: 23176:23214 BC_FREE_BUFFER uffffffffffffffff no match binder_alloc: 23176: binder_alloc_buf, no vma binder: 23214 RLIMIT_NICE not set binder: 23176:23194 transaction failed 29189/-3, size 0-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189