====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc1+ #314 Not tainted ------------------------------------------------------ syz-executor4/5865 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<0000000058dcd701>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000058dcd701>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000004a1b70ab>] 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_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_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xa0 net/ipv4/ip_sockglue.c:1252 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 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_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-executor4/5865: #0: (rtnl_mutex){+.+.}, at: [<000000004a1b70ab>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5865 Comm: syz-executor4 Not tainted 4.16.0-rc1+ #314 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_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xa0 net/ipv4/ip_sockglue.c:1252 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 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:00007f6742fb7c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f6742fb86d4 RCX: 0000000000453a59 RDX: 0000000000000027 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 000000000000000c R09: 0000000000000000 R10: 0000000020e48000 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000000000000523 R14: 00000000006f7be8 R15: 0000000000000000 binder: 6147:6149 transaction failed 29189/-22, size 0-0 line 2842 QAT: Invalid ioctl QAT: Invalid ioctl binder: BINDER_SET_CONTEXT_MGR already set binder: 6147:6169 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29189 binder: BINDER_SET_CONTEXT_MGR already set binder: 6276:6284 ioctl 40046207 0 returned -16 binder: release 6276:6278 transaction 4 out, still active binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 4, target dead ip6t_REJECT: TCP_RESET illegal for non-tcp syz-executor5 uses obsolete (PF_INET,SOCK_PACKET) device lo entered promiscuous mode ip6t_REJECT: TCP_RESET illegal for non-tcp RDS: rds_bind could not find a transport for 224.0.0.1, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 224.0.0.1, load rds_tcp or rds_rdma? kauditd_printk_skb: 14 callbacks suppressed audit: type=1400 audit(1518771131.766:47): avc: denied { ipc_lock } for pid=6589 comm="syz-executor6" 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 device eql entered promiscuous mode device eql entered promiscuous mode SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6732 comm=syz-executor6 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl audit: type=1400 audit(1518771132.935:48): avc: denied { name_bind } for pid=6814 comm="syz-executor6" src=20024 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:port_t:s0 tclass=dccp_socket permissive=1 audit: type=1400 audit(1518771132.935:49): avc: denied { node_bind } for pid=6814 comm="syz-executor6" saddr=::1 src=20024 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:node_t:s0 tclass=dccp_socket permissive=1 audit: type=1400 audit(1518771133.343:50): avc: denied { setgid } for pid=6922 comm="syz-executor0" 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 binder: 6988 RLIMIT_NICE not set binder: 7000 RLIMIT_NICE not set binder: undelivered death notification, 0000000000000000 binder: undelivered death notification, 0000000000000000 x86/PAT: syz-executor0:7033 map pfn RAM range req write-combining for [mem 0x1aa8d0000-0x1aa8d3fff], got write-back device eql entered promiscuous mode x86/PAT: syz-executor0:7041 map pfn RAM range req write-combining for [mem 0x1aa820000-0x1aa823fff], got write-back QAT: Invalid ioctl QAT: Invalid ioctl bpf: check failed: parse error mip6: mip6_rthdr_init_state: spi is not 0: 3842244608 bpf: check failed: parse error mip6: mip6_rthdr_init_state: spi is not 0: 3842244608 device eql entered promiscuous mode audit: type=1400 audit(1518771134.637:51): avc: denied { validate_trans } for pid=7278 comm="syz-executor0" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:security_t:s0 tclass=security permissive=1 device eql entered promiscuous mode sctp: [Deprecated]: syz-executor4 (pid 7367) Use of int in maxseg socket option. Use struct sctp_assoc_value instead audit: type=1400 audit(1518771134.896:52): avc: denied { write } for pid=7368 comm="syz-executor0" name="net" dev="proc" ino=19887 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(1518771134.897:53): avc: denied { add_name } for pid=7368 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(1518771134.898:54): avc: denied { create } for pid=7368 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 netlink: 40 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor4'. SELinux: policydb magic number 0x0 does not match expected magic number 0xf97cff8c SELinux: failed to load policy SELinux: policydb magic number 0x0 does not match expected magic number 0xf97cff8c SELinux: failed to load policy WARNING: CPU: 1 PID: 6552 at net/ipv6/xfrm6_tunnel.c:345 xfrm6_tunnel_net_exit+0x253/0x460 net/ipv6/xfrm6_tunnel.c:345