kernel msg: ebtables bug: please report to author: Wrong len argument ====================================================== WARNING: possible circular locking dependency detected 4.16.0-rc1+ #315 Not tainted ------------------------------------------------------ syz-executor3/5783 is trying to acquire lock: (sk_lock-AF_INET6){+.+.}, at: [<00000000dc186bbd>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET6){+.+.}, at: [<00000000dc186bbd>] do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<00000000c4459fa4>] 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 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 ipv6_setsockopt+0xa0/0x130 net/ipv6/ipv6_sockglue.c:917 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 -> #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-executor3/5783: #0: (rtnl_mutex){+.+.}, at: [<00000000c4459fa4>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 1 PID: 5783 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 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:00007f3424fe8c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f3424fe96d4 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 audit: type=1400 audit(1518822889.878:31): avc: denied { map_create } for pid=5800 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=bpf permissive=1 xt_CT: You must specify a L4 protocol, and not use inversions on it. audit: type=1400 audit(1518822889.904:32): avc: denied { setgid } for pid=5803 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 xt_HMARK: hash modulus can't be zero xt_HMARK: hash modulus can't be zero dccp_invalid_packet: pskb_may_pull failed dccp_invalid_packet: pskb_may_pull failed SELinux: unrecognized netlink message: protocol=9 nlmsg_type=24 sclass=netlink_audit_socket pig=6028 comm=syz-executor7 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=24 sclass=netlink_audit_socket pig=6044 comm=syz-executor7 Disabled LAPIC found during irq injection binder: BINDER_SET_CONTEXT_MGR already set binder_alloc: 6145: binder_alloc_buf, no vma binder: 6145:6160 ioctl 40046207 0 returned -16 binder: 6145:6169 transaction failed 29189/-3, size 40-0 line 2957 binder_alloc: 6145: binder_alloc_buf, no vma binder: 6145:6160 transaction failed 29189/-3, size 0-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_COMPLETE binder: undelivered transaction 3, process died. binder: undelivered transaction 2, process died. QAT: Invalid ioctl QAT: Invalid ioctl capability: warning: `syz-executor0' uses 32-bit capabilities (legacy support in use) SELinux: unrecognized netlink message: protocol=0 nlmsg_type=31 sclass=netlink_route_socket pig=6287 comm=syz-executor0 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=31 sclass=netlink_route_socket pig=6287 comm=syz-executor0 xt_nfacct: accounting object with name `syz0' does not exists kauditd_printk_skb: 17 callbacks suppressed audit: type=1400 audit(1518822891.756:50): avc: denied { map } for pid=6372 comm="syz-executor3" path="/dev/sg0" dev="devtmpfs" ino=1118 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:scsi_generic_device_t:s0 tclass=chr_file permissive=1 sctp: [Deprecated]: syz-executor5 (pid 6479) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor5 (pid 6487) Use of int in maxseg socket option. Use struct sctp_assoc_value instead Cannot find del_set index 0 as target audit: type=1400 audit(1518822892.208:51): avc: denied { map } for pid=6497 comm="syz-executor0" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=17197 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 Cannot find del_set index 0 as target audit: type=1400 audit(1518822892.365:52): avc: denied { getattr } for pid=6571 comm="syz-executor5" path="socket:[17235]" dev="sockfs" ino=17235 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 audit: type=1400 audit(1518822892.407:53): avc: denied { ioctl } for pid=6571 comm="syz-executor5" path="socket:[17235]" dev="sockfs" ino=17235 ioctlcmd=0x8904 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 audit: type=1400 audit(1518822892.410:54): avc: denied { getopt } for pid=6571 comm="syz-executor5" 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 audit: type=1400 audit(1518822892.411:55): avc: denied { setuid } for pid=6571 comm="syz-executor5" capability=7 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(1518822892.452:56): avc: denied { setopt } for pid=6596 comm="syz-executor5" 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 binder: 6679:6683 got transaction with invalid offset (0, min 0 max 0) or object. binder: 6679:6683 transaction failed 29201/-22, size 0-8 line 3020 binder: BINDER_SET_CONTEXT_MGR already set binder: 6679:6698 ioctl 40046207 0 returned -16 binder: undelivered TRANSACTION_ERROR: 29201 audit: type=1400 audit(1518822892.922:57): avc: denied { map } for pid=6721 comm="syz-executor5" path="/54/file0/bus" dev="tmpfs" ino=17361 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:tmpfs_t:s0 tclass=file permissive=1 audit: type=1400 audit(1518822892.992:58): avc: denied { read } for pid=6741 comm="syz-executor3" path="socket:[18388]" dev="sockfs" ino=18388 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 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=56 sclass=netlink_route_socket pig=6757 comm=syz-executor5 netlink: 'syz-executor5': attribute type 16 has an invalid length. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=56 sclass=netlink_route_socket pig=6757 comm=syz-executor5 netlink: 'syz-executor5': attribute type 16 has an invalid length. audit: type=1400 audit(1518822893.732:59): avc: denied { net_bind_service } for pid=1232 comm="kworker/u5:0" capability=10 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=cap_userns permissive=1 binder: 7074:7077 ERROR: BC_REGISTER_LOOPER called without request binder: 7085:7091 transaction failed 29189/-22, size 0-0 line 2842 binder: BINDER_SET_CONTEXT_MGR already set binder: 7085:7101 transaction failed 29189/-22, size 0-0 line 2842 binder: 7074:7077 ioctl 40046207 0 returned -16 binder: 7074:7107 ERROR: BC_REGISTER_LOOPER called without request binder_alloc: 7074: binder_alloc_buf, no vma binder: 7074:7094 transaction failed 29189/-3, size 0-0 line 2957 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 7074:7077 transaction 10 out, still active binder: undelivered TRANSACTION_COMPLETE binder: send failed reply for transaction 10, target dead device eql entered promiscuous mode binder: undelivered TRANSACTION_ERROR: 29189 syz-executor7 (7176) used greatest stack depth: 15952 bytes left device eql entered promiscuous mode xt_cgroup: both path and classid specified NFQUEUE: number of total queues is 0 xt_connbytes: Forcing CT accounting to be enabled NFQUEUE: number of total queues is 0 xt_connbytes: Forcing CT accounting to be enabled Option ' Ï' to dns_resolver key: bad/missing value Option ' Ï' to dns_resolver key: bad/missing value dccp_xmit_packet: Payload too large (65423) for featneg. dccp_xmit_packet: Payload too large (65423) for featneg. binder: 7893 RLIMIT_NICE not set binder: 7882:7894 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 7882:7894 unknown command 0 binder: 7882:7894 ioctl c0306201 2000a000 returned -22 binder: 7882:7904 transaction failed 29189/-22, size 56-8 line 2842 binder: BINDER_SET_CONTEXT_MGR already set binder: 7884:7893 ioctl 40046207 0 returned -16 binder: 7884:7903 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0 binder_alloc: binder_alloc_mmap_handler: 7882 20000000-20002000 already mapped failed -16 binder: 7884:7893 BC_CLEAR_DEATH_NOTIFICATION death notification not active binder: 7882:7894 Acquire 1 refcount change on invalid ref 0 ret -22 binder: 7882:7894 unknown command 0 binder: 7882:7919 transaction failed 29189/-22, size 56-8 line 2842 binder: 7882:7894 ioctl c0306201 2000a000 returned -22 binder: undelivered TRANSACTION_ERROR: 29189 binder: undelivered TRANSACTION_ERROR: 29189 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl BUG: sleeping function called from invalid context at mm/slab.h:420 in_atomic(): 1, irqs_disabled(): 0, pid: 8151, name: syz-executor5 INFO: lockdep is turned off. CPU: 0 PID: 8151 Comm: syz-executor5 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:00007fdca4c25c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fdca4c266d4 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 netlink: 'syz-executor0': attribute type 1 has an invalid length. netlink: 'syz-executor0': attribute type 1 has an invalid length. binder: 8270 RLIMIT_NICE not set binder: 8267:8279 transaction failed 29189/-22, size 0-0 line 2842 binder: 8267:8281 transaction failed 29189/-22, size 0-0 line 2842 binder: 8298 RLIMIT_NICE not set binder: 8288:8311 transaction failed 29189/-22, size 0-0 line 2842 netlink: 'syz-executor5': attribute type 21 has an invalid length. kauditd_printk_skb: 4 callbacks suppressed audit: type=1400 audit(1518822898.877:64): avc: denied { listen } for pid=8444 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_crypto_socket permissive=1 netlink: 'syz-executor5': attribute type 21 has an invalid length. QAT: Invalid ioctl