====================================================== WARNING: possible circular locking dependency detected 4.15.0-rc9+ #283 Not tainted ------------------------------------------------------ syz-executor4/5473 is trying to acquire lock: (sk_lock-AF_INET6){+.+.}, at: [<000000001d70602a>] lock_sock include/net/sock.h:1461 [inline] (sk_lock-AF_INET6){+.+.}, at: [<000000001d70602a>] do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 but task is already holding lock: (rtnl_mutex){+.+.}, at: [<000000002255dade>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (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:72 register_netdevice_notifier+0xad/0x860 net/core/dev.c:1590 tee_tg_check+0x1a0/0x280 net/netfilter/xt_TEE.c:106 xt_check_target+0x22c/0x7d0 net/netfilter/x_tables.c:845 check_target net/ipv6/netfilter/ip6_tables.c:538 [inline] find_check_entry.isra.7+0x935/0xcf0 net/ipv6/netfilter/ip6_tables.c:580 translate_table+0xf52/0x1690 net/ipv6/netfilter/ip6_tables.c:749 do_replace net/ipv6/netfilter/ip6_tables.c:1167 [inline] do_ip6t_set_ctl+0x370/0x5f0 net/ipv6/netfilter/ip6_tables.c:1693 nf_sockopt net/netfilter/nf_sockopt.c:106 [inline] nf_setsockopt+0x67/0xc0 net/netfilter/nf_sockopt.c:115 ipv6_setsockopt+0x115/0x150 net/ipv6/ipv6_sockglue.c:928 udpv6_setsockopt+0x45/0x80 net/ipv6/udp.c:1452 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1831 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1810 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #0 (sk_lock-AF_INET6){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 lock_sock_nested+0xc2/0x110 net/core/sock.c:2770 lock_sock include/net/sock.h:1461 [inline] do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 ipv6_setsockopt+0xd7/0x150 net/ipv6/ipv6_sockglue.c:922 sctp_setsockopt+0x2a0/0x5de0 net/sctp/socket.c:4074 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1831 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1810 entry_SYSCALL_64_fastpath+0x29/0xa0 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(sk_lock-AF_INET6); lock(rtnl_mutex); lock(sk_lock-AF_INET6); *** DEADLOCK *** 1 lock held by syz-executor4/5473: #0: (rtnl_mutex){+.+.}, at: [<000000002255dade>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72 stack backtrace: CPU: 1 PID: 5473 Comm: syz-executor4 Not tainted 4.15.0-rc9+ #283 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.37+0x2cd/0x2dc kernel/locking/lockdep.c:1218 check_prev_add kernel/locking/lockdep.c:1858 [inline] check_prevs_add kernel/locking/lockdep.c:1971 [inline] validate_chain kernel/locking/lockdep.c:2412 [inline] __lock_acquire+0x30a8/0x3e00 kernel/locking/lockdep.c:3426 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3914 lock_sock_nested+0xc2/0x110 net/core/sock.c:2770 lock_sock include/net/sock.h:1461 [inline] do_ipv6_setsockopt.isra.8+0x3c5/0x39d0 net/ipv6/ipv6_sockglue.c:167 ipv6_setsockopt+0xd7/0x150 net/ipv6/ipv6_sockglue.c:922 sctp_setsockopt+0x2a0/0x5de0 net/sctp/socket.c:4074 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2968 SYSC_setsockopt net/socket.c:1831 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1810 entry_SYSCALL_64_fastpath+0x29/0xa0 RIP: 0033:0x453299 RSP: 002b:00007fa26cdb7c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 000000000000002a RSI: 0000000000000029 RDI: 0000000000000013 RBP: 00000000000000ae R08: 0000000000000088 R09: 0000000000000000 R10: 0000000020058000 R11: 0000000000000212 R12: 00000000006f00f0 R13: 00000000ffffffff R14: 00007fa26cdb86d4 R15: 0000000000000000 netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. l2tp_core: tunl 59: sockfd_lookup(fd=0) returned -88 l2tp_core: tunl 59: sockfd_lookup(fd=0) returned -88 device eql entered promiscuous mode device eql entered promiscuous mode dccp_invalid_packet: P.Data Offset(131) too large kauditd_printk_skb: 22 callbacks suppressed audit: type=1326 audit(1517156609.898:48): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=5676 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1400 audit(1517156609.902:49): avc: denied { create } for pid=5686 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 audit: type=1326 audit(1517156609.909:50): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=5676 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=45 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156609.910:51): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=5676 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156609.913:52): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=5676 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=16 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156609.914:53): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=5676 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156609.914:54): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=5676 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=55 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156609.914:55): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=5676 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156609.914:56): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=5676 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=213 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156609.915:57): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=5676 comm="syz-executor5" exe="/root/syz-executor5" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 netlink: 'syz-executor4': attribute type 21 has an invalid length. netlink: 'syz-executor4': attribute type 21 has an invalid length. netlink: 8 bytes leftover after parsing attributes in process `syz-executor7'. futex_wake_op: syz-executor0 tries to shift op by -1; fix this program futex_wake_op: syz-executor0 tries to shift op by -1; fix this program mac80211_hwsim: wmediumd released netlink socket, switching to perfect channel medium Protocol error: SET target dimension is over the limit! Cannot find add_set index 0 as target Cannot find add_set index 0 as target Protocol error: SET target dimension is over the limit! ieee80211 phy2: Selected rate control algorithm 'minstrel_ht' ieee80211 phy3: Selected rate control algorithm 'minstrel_ht' binder: 5997:6003 BC_INCREFS_DONE u0000000000000000 no match device eql entered promiscuous mode mmap: syz-executor0 (6053) uses deprecated remap_file_pages() syscall. See Documentation/vm/remap_file_pages.txt. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl raw_sendmsg: syz-executor0 forgot to set AF_INET. Fix it! IPv4: Oversized IP packet from 172.20.2.12 netlink: 'syz-executor2': attribute type 39 has an invalid length. netlink: 28 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 'syz-executor2': attribute type 39 has an invalid length. netlink: 28 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 1 has an invalid length. netlink: 'syz-executor6': attribute type 1 has an invalid length. binder: 6921:6933 ioctl 8905 2077effc returned -22 binder: 6921:6933 ERROR: BC_REGISTER_LOOPER called without request binder: 6921:6933 BC_DEAD_BINDER_DONE 0000000000000000 not found binder: BINDER_SET_CONTEXT_MGR already set binder: 6921:6953 ioctl 40046207 0 returned -16 binder: 6921:6962 ioctl 8905 2077effc returned -22 binder: 6921:6933 ERROR: BC_REGISTER_LOOPER called without request binder_alloc: 6921: binder_alloc_buf, no vma binder: 6921:6962 transaction failed 29189/-3, size 0-0 line 2903 binder: undelivered TRANSACTION_ERROR: 29189 binder: release 6921:6933 transaction 7 out, still active binder: send failed reply for transaction 6 to 6921:6933 binder: send failed reply for transaction 7, target dead binder: undelivered TRANSACTION_COMPLETE binder: undelivered TRANSACTION_ERROR: 29189 ptrace attach of "/root/syz-executor1"[3735] was attempted by "/root/syz-executor1"[7048] kauditd_printk_skb: 57 callbacks suppressed audit: type=1326 audit(1517156615.156:114): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7067 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 ptrace attach of "/root/syz-executor1"[3735] was attempted by "/root/syz-executor1"[7071] audit: type=1326 audit(1517156615.157:115): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7067 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=154 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156615.157:116): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7067 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156615.157:117): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7067 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=2 compat=0 ip=0x40d591 code=0x7ffc0000 audit: type=1326 audit(1517156615.157:118): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7067 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156615.157:119): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7067 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=16 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156615.157:120): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7067 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 device eql entered promiscuous mode audit: type=1326 audit(1517156615.157:121): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7067 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=9 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156615.157:122): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7067 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517156615.165:123): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=7067 comm="syz-executor0" exe="/root/syz-executor0" sig=0 arch=c000003e syscall=154 compat=0 ip=0x453299 code=0x7ffc0000 8021q: VLANs not supported on lo 8021q: VLANs not supported on lo QAT: Invalid ioctl QAT: Invalid ioctl binder: 7467:7471 ERROR: BC_REGISTER_LOOPER called without request netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. binder: 7467:7481 ERROR: BC_REGISTER_LOOPER called without request netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. binder: 7700 RLIMIT_NICE not set atomic_op 00000000a1d73159 conn xmit_atomic (null) binder: 7697:7716 tried to acquire reference to desc 0, got 1 instead binder: 7716 RLIMIT_NICE not set do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app do_dccp_getsockopt: sockopt(PACKET_SIZE) is deprecated: fix your app