dccp_invalid_packet: P.type (REQUEST) not Data || [Data]Ack, while P.X == 0 ====================================================== ipt_CLUSTERIP: Please specify destination IP WARNING: possible circular locking dependency detected 4.16.0-rc1+ #315 Not tainted ------------------------------------------------------ syz-executor1/5277 is trying to acquire lock: (sk_lock-AF_INET6){+.+.}, at: [<00000000bfdb7df7>] lock_sock include/net/sock.h:1463 [inline] (sk_lock-AF_INET6){+.+.}, at: [<00000000bfdb7df7>] do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000008beceb0d>] 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_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 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 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-executor1/5277: #0: (rtnl_mutex){+.+.}, at: [<000000008beceb0d>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 stack backtrace: CPU: 0 PID: 5277 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 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 RIP: 0033:0x453a59 RSP: 002b:00007f3f567c9c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 00007f3f567ca6d4 RCX: 0000000000453a59 RDX: 000000000000002a RSI: 0000000000000029 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000000000088 R09: 0000000000000000 R10: 0000000020625000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004fb R14: 00000000006f7828 R15: 0000000000000000 ipt_CLUSTERIP: Please specify destination IP 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. 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. xt_CT: You must specify a L4 protocol, and not use inversions on it. print_req_error: I/O error, dev loop0, sector 0 print_req_error: I/O error, dev loop0, sector 0 audit: type=1400 audit(1518802710.216:16): avc: denied { dac_override } for pid=5466 comm="syz-executor3" capability=1 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(1518802710.242:17): avc: denied { map } for pid=5462 comm="syz-executor4" path="/dev/dsp" dev="devtmpfs" ino=153 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=system_u:object_r:sound_device_t:s0 tclass=chr_file permissive=1 audit: type=1400 audit(1518802710.332:18): avc: denied { map } for pid=5490 comm="syz-executor3" path=2F616E6F6E5F6875676570616765202864656C6574656429 dev="hugetlbfs" ino=14284 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:object_r:hugetlbfs_t:s0 tclass=file permissive=1 sctp: [Deprecated]: syz-executor3 (pid 5508) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor3 (pid 5516) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead audit: type=1400 audit(1518802710.450:19): avc: denied { create } for pid=5526 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_generic_socket permissive=1 dccp_invalid_packet: pskb_may_pull failed sctp: [Deprecated]: syz-executor3 (pid 5536) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead audit: type=1400 audit(1518802710.478:20): avc: denied { write } for pid=5526 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_generic_socket permissive=1 audit: type=1400 audit(1518802710.503:21): avc: denied { read } for pid=5530 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_generic_socket permissive=1 sctp: [Deprecated]: syz-executor3 (pid 5551) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead audit: type=1400 audit(1518802710.779:22): avc: denied { dac_read_search } for pid=4220 comm="syz-executor5" capability=2 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 capability: warning: `syz-executor7' uses 32-bit capabilities (legacy support in use) audit: type=1400 audit(1518802711.041:23): avc: denied { net_admin } for pid=5687 comm="syz-executor5" capability=12 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(1518802711.073:24): avc: denied { map } for pid=5700 comm="modprobe" path="/bin/kmod" dev="sda1" ino=1440 scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:object_r:file_t:s0 tclass=file permissive=1 audit: type=1400 audit(1518802711.114:25): avc: denied { dac_override } for pid=5688 comm="syz-executor3" capability=1 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 ALSA: seq fatal error: cannot create timer (-16) QAT: Invalid ioctl BUG: sleeping function called from invalid context at mm/slab.h:420 in_atomic(): 1, irqs_disabled(): 0, pid: 5842, name: syz-executor5 INFO: lockdep is turned off. CPU: 1 PID: 5842 Comm: syz-executor5 Not tainted 4.16.0-rc1+ #315 QAT: Invalid ioctl 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:00007f82742c8c68 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007f82742c96d4 RCX: 0000000000453a59 RDX: 00000000000001c1 RSI: 0000000020dbf000 RDI: 0000000000000013 RBP: 000000000071bea0 R08: 0000000020b2d000 R09: 0000000000000010 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000004b9 R14: 00000000006f71f8 R15: 0000000000000000 QAT: Invalid ioctl QAT: Invalid ioctl binder: 5891 RLIMIT_NICE not set binder: 5891 RLIMIT_NICE not set binder: 5888:5905 tried to acquire reference to desc 0, got 1 instead binder: 5888:5905 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0 binder: 5888:5891 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 binder: 5891 RLIMIT_NICE not set binder: 5888:5905 BC_DEAD_BINDER_DONE 0000000000000003 not found binder: 5888:5891 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0 binder: 5891 RLIMIT_NICE not set binder: undelivered death notification, 0000000000000000 netlink: 40 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 40 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 216 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 216 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 216 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 216 bytes leftover after parsing attributes in process `syz-executor6'. xt_cgroup: invalid path, errno=-2 xt_cgroup: invalid path, errno=-2 xt_cgroup: invalid path, errno=-2 ip6t_REJECT: TCP_RESET illegal for non-tcp xt_cgroup: invalid path, errno=-2 ip6t_REJECT: TCP_RESET illegal for non-tcp netlink: 'syz-executor1': attribute type 21 has an invalid length. netlink: 'syz-executor1': attribute type 21 has an invalid length. xt_cgroup: invalid path, errno=-2 Cannot find add_set index 0 as target Cannot find add_set index 0 as target openvswitch: netlink: IP tunnel attribute has 3 unknown bytes. binder_alloc: binder_alloc_mmap_handler: 6720 20004000-20005000 already mapped failed -16 netlink: 'syz-executor1': attribute type 1 has an invalid length. netlink: 'syz-executor1': attribute type 1 has an invalid length. netlink: 'syz-executor1': attribute type 1 has an invalid length. netlink: 'syz-executor1': attribute type 1 has an invalid length. netlink: 'syz-executor1': attribute type 1 has an invalid length. kauditd_printk_skb: 37 callbacks suppressed audit: type=1400 audit(1518802715.239:63): avc: denied { net_bind_service } for pid=6941 comm="syz-executor7" capability=10 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: 6998 RLIMIT_NICE not set binder: 6998 RLIMIT_NICE not set binder: 6996:7009 tried to acquire reference to desc 0, got 1 instead binder: 6996:6998 unknown command 536907575 binder: 6996:6998 ioctl c0306201 20008fd0 returned -22 binder: 6996:7009 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 binder: 7009 RLIMIT_NICE not set binder: 6996:7009 BC_REQUEST_DEATH_NOTIFICATION death notification already set device eql entered promiscuous mode dccp_xmit_packet: Payload too large (65423) for featneg. syz-executor5 uses obsolete (PF_INET,SOCK_PACKET) device eql entered promiscuous mode dccp_xmit_packet: Payload too large (65423) for featneg. dccp_xmit_packet: Payload too large (65423) for featneg. IPVS: length: 69 != 24 IPVS: length: 69 != 24 dccp_xmit_packet: Payload too large (65423) for featneg. netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. openvswitch: netlink: ufid size 20 bytes exceeds the range (1, 16) openvswitch: netlink: ufid size 20 bytes exceeds the range (1, 16) netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 4 bytes leftover after parsing attributes in process `syz-executor4'. openvswitch: netlink: ufid size 20 bytes exceeds the range (1, 16) openvswitch: netlink: ufid size 20 bytes exceeds the range (1, 16) NFQUEUE: number of total queues is 0 audit: type=1400 audit(1518802716.795:64): avc: denied { map } for pid=7363 comm="syz-executor0" path="socket:[20270]" dev="sockfs" ino=20270 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=packet_socket permissive=1 NFQUEUE: number of total queues is 0 NFQUEUE: number of total queues is 0 NFQUEUE: number of total queues is 0 xt_connbytes: Forcing CT accounting to be enabled NFQUEUE: number of total queues is 0 audit: type=1400 audit(1518802717.293:65): avc: denied { bind } for pid=7476 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 audit: type=1400 audit(1518802717.457:66): avc: denied { setopt } for pid=7530 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_generic_socket permissive=1 arp_tables: arp_tables: error: 'îÏ ¡˜™«arY,Gµí>+×t€ó_Ãm ' audit: type=1400 audit(1518802717.904:67): avc: denied { map } for pid=7683 comm="syz-executor6" path="/dev/sg0" dev="devtmpfs" ino=100 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 NFQUEUE: number of total queues is 0 device eql entered promiscuous mode NFQUEUE: number of total queues is 0 audit: type=1400 audit(1518802718.436:68): avc: denied { setattr } for pid=7882 comm="syz-executor7" name="pagemap" dev="proc" ino=22739 scontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tcontext=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 tclass=file permissive=1 device syz6 entered promiscuous mode device syz6 left promiscuous mode