====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc1+ #315 Not tainted ------------------------------------------------------ syz-executor1/6083 is trying to acquire lock: (sk_lock-AF_INET6){+.+.}, at: [<00000000f83a213b>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET6){+.+.}, at: [<00000000f83a213b>] do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000000ff9fcb9>] 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 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_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 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 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-executor1/6083: #0: (rtnl_mutex){+.+.}, at: [<000000000ff9fcb9>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 6083 Comm: syz-executor1 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 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 RIP: 0033:0x453a59 RSP: 002b:00007f4a4ce78c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f4a4ce796d4 RCX: 0000000000453a59 RDX: 000000000000001b RSI: 0000000000000029 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000000000020 R09: 0000000000000000 R10: 00000000200aa000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004f7 R14: 00000000006f77c8 R15: 0000000000000000 QAT: Invalid ioctl QAT: Invalid ioctl snd_dummy snd_dummy.0: control 120:0:0:Î:0 is already present capability: warning: `syz-executor6' uses 32-bit capabilities (legacy support in use) audit: type=1400 audit(1518815887.332:32): avc: denied { setgid } for pid=6164 comm="syz-executor4" 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 netlink: 'syz-executor5': attribute type 1 has an invalid length. netlink: 'syz-executor5': attribute type 1 has an invalid length. x86/PAT: syz-executor4:6203 map pfn RAM range req write-combining for [mem 0x19f5d0000-0x19f5d3fff], got write-back x86/PAT: syz-executor4:6203 map pfn RAM range req write-combining for [mem 0x1bbef0000-0x1bbef3fff], got write-back QAT: Invalid ioctl QAT: Invalid ioctl binder: 6342:6355 transaction failed 29189/-22, size 0-0 line 2842 binder: 6342:6355 transaction failed 29189/-22, size 0-0 line 2842 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6400 comm=syz-executor6 ipt_CLUSTERIP: Please specify destination IP SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6412 comm=syz-executor6 ipt_CLUSTERIP: Please specify destination IP SELinux: unrecognized netlink message: protocol=0 nlmsg_type=9654 sclass=netlink_route_socket pig=6451 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=9654 sclass=netlink_route_socket pig=6451 comm=syz-executor0 syz-executor7 (6580) used greatest stack depth: 14064 bytes left x_tables: ip_tables: TCPMSS target: only valid for protocol 6 kauditd_printk_skb: 8 callbacks suppressed audit: type=1400 audit(1518815889.140:41): avc: denied { read } for pid=6688 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 x_tables: ip_tables: TCPMSS target: only valid for protocol 6 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=48 sclass=netlink_audit_socket pig=6731 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=48 sclass=netlink_audit_socket pig=6740 comm=syz-executor7 binder: 6806:6809 ioctl 8004e500 203ecffc returned -22 xt_l2tp: wrong L2TP version: 0 xt_l2tp: wrong L2TP version: 0 audit: type=1400 audit(1518815889.534:42): avc: denied { set_context_mgr } for pid=6806 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=binder permissive=1 binder: 6806:6809 unknown command 0 audit: type=1400 audit(1518815889.534:43): avc: denied { call } for pid=6806 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=binder permissive=1 binder: 6806:6809 ioctl c0306201 201eafd0 returned -22 audit: type=1400 audit(1518815889.534:44): avc: denied { transfer } for pid=6806 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=binder permissive=1 binder_alloc: binder_alloc_mmap_handler: 6806 20000000-20002000 already mapped failed -16 binder: 6806:6809 ioctl 8004e500 203ecffc returned -22 binder: BINDER_SET_CONTEXT_MGR already set binder: 6806:6827 ioctl 40046207 0 returned -16 binder_alloc: 6806: binder_alloc_buf, no vma binder: 6806:6829 transaction failed 29189/-3, size 80-8 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 6806:6809 transaction 6 out, still active binder: unexpected work type, 4, not freed binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 6, target dead BUG: sleeping function called from invalid context at mm/slab.h:420 in_atomic(): 1, irqs_disabled(): 0, pid: 6904, name: syz-executor7 INFO: lockdep is turned off. CPU: 1 PID: 6904 Comm: syz-executor7 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 ___might_sleep+0x2b2/0x470 kernel/sched/core.c:6133 __might_sleep+0x95/0x190 kernel/sched/core.c:6086 slab_pre_alloc_hook mm/slab.h:420 [inline] slab_alloc mm/slab.c:3365 [inline] kmem_cache_alloc_trace+0x299/0x740 mm/slab.c:3605 kmalloc include/linux/slab.h:512 [inline] kzalloc include/linux/slab.h:701 [inline] rds_loop_conn_alloc+0xc8/0x380 net/rds/loop.c:126 __rds_conn_create+0x112f/0x1b50 net/rds/connection.c:227 rds_conn_create_outgoing+0x3f/0x50 net/rds/connection.c:309 rds_sendmsg+0xda3/0x2390 net/rds/send.c:1126 sock_sendmsg_nosec net/socket.c:630 [inline] sock_sendmsg+0xca/0x110 net/socket.c:640 SYSC_sendto+0x361/0x5c0 net/socket.c:1747 SyS_sendto+0x40/0x50 net/socket.c:1715 do_syscall_64+0x280/0x940 arch/x86/entry/common.c:287 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x453a59 RSP: 002b:00007fb78f1bfc68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fb78f1c06d4 RCX: 0000000000453a59 RDX: 0000000000000000 RSI: 00000000200eafc8 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000020472ff0 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000 device eql entered promiscuous mode device eql entered promiscuous mode sctp: [Deprecated]: syz-executor0 (pid 7032) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor0 (pid 7032) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead do_dccp_setsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app syz-executor1 uses obsolete (PF_INET,SOCK_PACKET) device eql entered promiscuous mode do_dccp_setsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app dccp_invalid_packet: P.type (REQUEST) not Data || [Data]Ack, while P.X == 0 audit: type=1400 audit(1518815890.890:45): avc: denied { map } for pid=7085 comm="syz-executor2" path="pipe:[19269]" dev="pipefs" ino=19269 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=fifo_file permissive=1 Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! audit: type=1400 audit(1518815891.194:46): avc: denied { create } for pid=7163 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_connector_socket permissive=1 audit: type=1400 audit(1518815891.229:47): avc: denied { ioctl } for pid=7160 comm="syz-executor7" path="socket:[19423]" dev="sockfs" ino=19423 ioctlcmd=0x89e2 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=sock_file permissive=1 audit: type=1400 audit(1518815891.233:48): avc: denied { getopt } for pid=7160 comm="syz-executor7" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:unlabeled_t:s0 tclass=socket permissive=1 audit: type=1400 audit(1518815891.240:49): avc: denied { write } for pid=7163 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_connector_socket permissive=1 dccp_close: ABORT with 510 bytes unread arp_tables: arp_tables: error: 'îÏ ¡˜™«arY,Gµí>+×t€ó_Ãm ' binder_alloc: 7236: binder_alloc_buf, no vma binder: 7236:7237 transaction failed 29189/-3, size -217-0 line 2957 binder: 7235:7243 BC_DEAD_BINDER_DONE 0000000000000000 not found binder: 7235:7243 BC_FREE_BUFFER u0000000000000000 no match binder: 7235:7243 got reply transaction with no transaction stack binder: 7235:7243 transaction failed 29201/-71, size 56-8 line 2757 arp_tables: arp_tables: error: 'îÏ ¡˜™«arY,Gµí>+×t€ó_Ãm ' binder: BINDER_SET_CONTEXT_MGR already set binder: 7236:7251 ioctl 40046207 0 returned -16 binder: 7235:7257 BC_DEAD_BINDER_DONE 0000000000000000 not found binder: undelivered TRANSACTION_ERROR: 29189 binder: 7235:7257 BC_FREE_BUFFER u0000000000000000 no match binder: 7235:7257 got reply transaction with no transaction stack binder: 7235:7257 transaction failed 29201/-71, size 56-8 line 2757 audit: type=1400 audit(1518815891.693:50): avc: denied { shutdown } for pid=7262 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_generic_socket permissive=1 device eql entered promiscuous mode device eql entered promiscuous mode ip6t_srh: unknown srh invflags FFFE ip6t_srh: unknown srh invflags FFFE kvm: emulating exchange as write device eql entered promiscuous mode SELinux: unrecognized netlink message: protocol=0 nlmsg_type=4 sclass=netlink_route_socket pig=7810 comm=syz-executor5 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl netlink: 'syz-executor7': attribute type 1 has an invalid length. netlink: 'syz-executor7': attribute type 1 has an invalid length. IPVS: ftp: loaded support on port[0] = 21 IPv6: ADDRCONF(NETDEV_UP): bridge0: link is not ready xt_connbytes: Forcing CT accounting to be enabled binder: 8213:8220 got transaction with invalid offset (0, min 0 max 0) or object. binder: 8213:8220 transaction failed 29201/-22, size 0-8 line 3020 binder: BINDER_SET_CONTEXT_MGR already set binder_alloc: 8213: binder_alloc_buf, no vma binder: 8213:8244 transaction failed 29189/-3, size 0-8 line 2957 binder: 8213:8232 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29201 Cannot find set identified by id 0 to match Cannot find set identified by id 0 to match