====================================================== WARNING: possible circular locking dependency detected netlink: 12 bytes leftover after parsing attributes in process `syz-executor7'. 4.15.0+ #221 Not tainted ------------------------------------------------------ syz-executor3/5675 is trying to acquire lock: (sk_lock-AF_INET){+.+.}, at: [<000000007ea53636>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET){+.+.}, at: [<000000007ea53636>] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 but task is already holding lock: netlink: 12 bytes leftover after parsing attributes in process `syz-executor7'. (rtnl_mutex){+.+.}, at: [<000000005feb2887>] 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 clusterip_config_entry_put net/ipv4/netfilter/ipt_CLUSTERIP.c:114 [inline] clusterip_tg_destroy+0x389/0x6e0 net/ipv4/netfilter/ipt_CLUSTERIP.c:518 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 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #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: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 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #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 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 entry_SYSCALL_64_fastpath+0x29/0xa0 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-executor3/5675: #0: (rtnl_mutex){+.+.}, at: [<000000005feb2887>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 0 PID: 5675 Comm: syz-executor3 Not tainted 4.15.0+ #221 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 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 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fbee039ac58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000025 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00000000000005d3 R08: 000000000000000c R09: 0000000000000000 R10: 00000000204f4000 R11: 0000000000000212 R12: 00000000006f7c68 R13: 00000000ffffffff R14: 00007fbee039b6d4 R15: 0000000000000000 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=29 sclass=netlink_tcpdiag_socket pig=5709 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=29 sclass=netlink_tcpdiag_socket pig=5709 comm=syz-executor7 KCM: Hard failure on kcm_write_msgs xt_TCPMSS: Only works on TCP SYN packets can: request_module (can-proto-0) failed. openvswitch: netlink: Flow get message rejected, Key attribute missing. openvswitch: netlink: Flow get message rejected, Key attribute missing. can: request_module (can-proto-0) failed. Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! xt_CT: You must specify a L4 protocol, and not use inversions on it. xt_CT: You must specify a L4 protocol, and not use inversions on it. netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 'syz-executor5': attribute type 21 has an invalid length. netlink: 'syz-executor5': attribute type 1 has an invalid length. netlink: 'syz-executor5': attribute type 21 has an invalid length. netlink: 'syz-executor5': attribute type 1 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'. mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium netlink: 'syz-executor6': attribute type 15 has an invalid length. netlink: 'syz-executor3': attribute type 1 has an invalid length. sctp: [Deprecated]: syz-executor5 (pid 6410) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor5 (pid 6410) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead xt_nfacct: accounting object with name `syz0' does not exists xt_nfacct: accounting object with name `syz0' does not exists netlink: 'syz-executor6': attribute type 3 has an invalid length. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=54 sclass=netlink_route_socket pig=6541 comm=syz-executor6 IPv4: Oversized IP packet from 127.0.0.1 IPv4: Oversized IP packet from 127.0.0.1 can: request_module (can-proto-0) failed. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=54 sclass=netlink_route_socket pig=6558 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=54 sclass=netlink_route_socket pig=6579 comm=syz-executor6 kauditd_printk_skb: 20 callbacks suppressed audit: type=1400 audit(1517962631.226:43): avc: denied { relabelto } for pid=6581 comm="syz-executor1" scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:auditctl_exec_t:s0 tclass=packet permissive=1 can: request_module (can-proto-0) failed. audit: type=1400 audit(1517962631.297:44): avc: denied { accept } for pid=6606 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_netfilter_socket permissive=1 dccp_invalid_packet: P.Data Offset(66) too large dccp_invalid_packet: P.Data Offset(66) too large audit: type=1400 audit(1517962631.477:45): avc: denied { ioctl } for pid=6667 comm="syz-executor2" path="socket:[16236]" dev="sockfs" ino=16236 ioctlcmd=0x8933 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 IPv4: Oversized IP packet from 127.0.0.1 device syz3 entered promiscuous mode device syz3 left promiscuous mode ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' audit: type=1400 audit(1517962631.911:46): avc: denied { accept } for pid=6822 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_generic_socket permissive=1 ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' l2tp_ppp: tunl 59: set debug=f55d40e ipt_CLUSTERIP: Please specify destination IP ipt_CLUSTERIP: Please specify destination IP audit: type=1400 audit(1517962632.216:47): avc: denied { bind } for pid=6947 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: 3 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. audit: type=1400 audit(1517962632.255:48): avc: denied { setopt } for pid=6947 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 Cannot find set identified by id 0 to match Cannot find set identified by id 0 to match tc_dump_action: action bad kind mip6: mip6_rthdr_init_state: state's mode is not 2: 0 RDS: rds_bind could not find a transport for 224.0.0.1, load rds_tcp or rds_rdma? dst_release: dst:00000000ca03e412 refcnt:-1 sctp: [Deprecated]: syz-executor3 (pid 7240) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor3 (pid 7254) Use of int in maxseg socket option. Use struct sctp_assoc_value instead netlink: 40 bytes leftover after parsing attributes in process `syz-executor5'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor5'. ICMPv6: NA: 00:00:00:00:00:00 advertised our address fe80::aa on syz0! ICMPv6: NA: 00:00:00:00:00:00 advertised our address fe80::aa on syz0! audit: type=1400 audit(1517962633.662:49): avc: denied { create } for pid=7477 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=netlink_fib_lookup_socket permissive=1 audit: type=1400 audit(1517962633.662:50): avc: denied { write } for pid=7477 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=netlink_fib_lookup_socket permissive=1 sctp: [Deprecated]: syz-executor0 (pid 7565) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor0 (pid 7557) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead audit: type=1400 audit(1517962634.019:51): avc: denied { write } for pid=7597 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_crypto_socket permissive=1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=32348 sclass=netlink_route_socket pig=7804 comm=syz-executor1 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=32348 sclass=netlink_route_socket pig=7804 comm=syz-executor1 Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! sctp: [Deprecated]: syz-executor0 (pid 7971) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor0 (pid 7971) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead netlink: 'syz-executor5': attribute type 1 has an invalid length. netlink: 'syz-executor5': attribute type 1 has an invalid length. dccp_invalid_packet: P.type (REQUEST) not Data || [Data]Ack, while P.X == 0 syz-executor1 (8129) used greatest stack depth: 16368 bytes left audit: type=1400 audit(1517962635.538:52): avc: denied { setopt } for pid=8194 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 netlink: 'syz-executor6': attribute type 18 has an invalid length. netlink: 'syz-executor6': attribute type 18 has an invalid length. netlink: 'syz-executor0': attribute type 21 has an invalid length. do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app netlink: 'syz-executor0': attribute type 21 has an invalid length. do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app netlink: 'syz-executor6': attribute type 39 has an invalid length. can: request_module (can-proto-6) failed. can: request_module (can-proto-6) failed. kauditd_printk_skb: 2 callbacks suppressed audit: type=1400 audit(1517962636.245:55): avc: denied { ioctl } for pid=8475 comm="syz-executor1" path="socket:[19754]" dev="sockfs" ino=19754 ioctlcmd=0x8933 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=8611 comm=syz-executor4 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=8619 comm=syz-executor4 dccp_xmit_packet: Payload too large (65423) for featneg. dccp_close: ABORT with 65423 bytes unread xt_HMARK: spi-mask and port-mask can't be combined Protocol error: SET target dimension is over the limit! Protocol error: SET target dimension is over the limit! ipt_REJECT: TCP_RESET invalid for non-tcp ipt_REJECT: TCP_RESET invalid for non-tcp netlink: 'syz-executor2': attribute type 3 has an invalid length. netlink: 'syz-executor2': attribute type 3 has an invalid length. netlink: 16 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 13 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 13 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor6'. sctp: [Deprecated]: syz-executor7 (pid 9185) Use of int in maxseg socket option. Use struct sctp_assoc_value instead Cannot find set identified by id 1 to match