====================================================== WARNING: possible circular locking dependency detected 4.15.0+ #290 Not tainted ------------------------------------------------------ syz-executor3/23006 is trying to acquire lock: (rtnl_mutex){+.+.}, at: [<0000000013ea55e8>] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:74 but task is already holding lock: (sk_lock-AF_INET){+.+.}, at: [<0000000037a64ff8>] lock_sock include/net/sock.h:1461 [inline] (sk_lock-AF_INET){+.+.}, at: [<0000000037a64ff8>] ip_setsockopt+0x8c/0xb0 net/ipv4/ip_sockglue.c:1259 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (sk_lock-AF_INET){+.+.}: lock_sock_nested+0xc2/0x110 net/core/sock.c:2780 lock_sock include/net/sock.h:1461 [inline] do_ip_setsockopt.isra.12+0x1d9/0x3210 net/ipv4/ip_sockglue.c:646 ip_setsockopt+0x3a/0xb0 net/ipv4/ip_sockglue.c:1252 dccp_setsockopt+0x85/0xd0 net/dccp/proto.c:576 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 SYSC_setsockopt net/socket.c:1849 [inline] SyS_setsockopt+0x189/0x360 net/socket.c:1828 entry_SYSCALL_64_fastpath+0x29/0xa0 -> #0 (rtnl_mutex){+.+.}: lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:3920 __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 register_netdevice_notifier+0xad/0x860 net/core/dev.c:1607 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/ipv4/netfilter/ip_tables.c:513 [inline] find_check_entry.isra.8+0x8c8/0xcb0 net/ipv4/netfilter/ip_tables.c:554 translate_table+0xed1/0x1610 net/ipv4/netfilter/ip_tables.c:725 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline] do_ipt_set_ctl+0x370/0x5f0 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+0xa1/0xb0 net/ipv4/ip_sockglue.c:1260 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 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: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(sk_lock-AF_INET); lock(rtnl_mutex); lock(sk_lock-AF_INET); lock(rtnl_mutex); *** DEADLOCK *** 1 lock held by syz-executor3/23006: #0: (sk_lock-AF_INET){+.+.}, at: [<0000000037a64ff8>] lock_sock include/net/sock.h:1461 [inline] #0: (sk_lock-AF_INET){+.+.}, at: [<0000000037a64ff8>] ip_setsockopt+0x8c/0xb0 net/ipv4/ip_sockglue.c:1259 stack backtrace: CPU: 1 PID: 23006 Comm: syz-executor3 Not tainted 4.15.0+ #290 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 __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 register_netdevice_notifier+0xad/0x860 net/core/dev.c:1607 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/ipv4/netfilter/ip_tables.c:513 [inline] find_check_entry.isra.8+0x8c8/0xcb0 net/ipv4/netfilter/ip_tables.c:554 translate_table+0xed1/0x1610 net/ipv4/netfilter/ip_tables.c:725 do_replace net/ipv4/netfilter/ip_tables.c:1141 [inline] do_ipt_set_ctl+0x370/0x5f0 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+0xa1/0xb0 net/ipv4/ip_sockglue.c:1260 udp_setsockopt+0x45/0x80 net/ipv4/udp.c:2401 sock_common_setsockopt+0x95/0xd0 net/core/sock.c:2978 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:00007f8ed1184c58 EFLAGS: 00000212 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 000000000071bea0 RCX: 0000000000453299 RDX: 0000000000000040 RSI: 0000000000000000 RDI: 0000000000000013 RBP: 00000000000003fe R08: 00000000000002e0 R09: 0000000000000000 R10: 000000002002ccf8 R11: 0000000000000212 R12: 00000000006f5070 R13: 00000000ffffffff R14: 00007f8ed11856d4 R15: 0000000000000000 QAT: Invalid ioctl dccp_invalid_packet: P.Data Offset(124) too large dccp_invalid_packet: P.Data Offset(124) too large device eql entered promiscuous mode netlink: 'syz-executor7': attribute type 1 has an invalid length. QAT: Invalid ioctl QAT: Invalid ioctl binder: undelivered death notification, 0000000000000000 binder: BINDER_SET_CONTEXT_MGR already set binder: 23488:23499 ioctl 40046207 0 returned -16 binder: undelivered death notification, 0000000000000000 netlink: 8 bytes leftover after parsing attributes in process `syz-executor1'. kvm [23562]: vcpu0, guest rIP: 0xfff0 Hyper-V uhandled wrmsr: 0x40000020 data 0x0 QAT: Invalid ioctl rfkill: input handler disabled QAT: Invalid ioctl rfkill: input handler enabled kvm [23562]: vcpu0, guest rIP: 0xfff0 Hyper-V uhandled wrmsr: 0x40000020 data 0x0 x_tables: ip_tables: osf match: only valid for protocol 6 x_tables: ip_tables: osf match: only valid for protocol 6 kvm: vcpu 0: requested 10176 ns lapic timer period limited to 500000 ns kauditd_printk_skb: 99 callbacks suppressed audit: type=1326 audit(1517489256.743:1686): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23761 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489256.744:1687): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23761 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489256.744:1688): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23761 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=53 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489256.746:1689): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23761 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489256.746:1690): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23761 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489256.747:1691): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23761 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=72 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489256.747:1692): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23761 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489256.747:1693): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23761 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489256.747:1694): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23761 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=109 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489256.748:1695): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=23761 comm="syz-executor2" exe="/root/syz-executor2" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 encrypted_key: master key parameter 'ƞ g*<-et4I`rE:lAPSevQ*u1lOlFyOWֿ$mi' is invalid encrypted_key: master key parameter 'ƞ g*<-et4I`rE:lAPSevQ*u1lOlFyOWֿ$mi' is invalid ip6t_REJECT: TCP_RESET illegal for non-tcp ip6t_REJECT: TCP_RESET illegal for non-tcp kvm [24257]: vcpu0, guest rIP: 0xfff0 Hyper-V unhandled rdmsr: 0x40000085 kvm [24257]: vcpu0, guest rIP: 0xfff0 Hyper-V unhandled rdmsr: 0x40000085 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. mip6: mip6_rthdr_init_state: state's mode is not 2: 0 mip6: mip6_rthdr_init_state: state's mode is not 2: 0 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl --map-set only usable from mangle table --map-set only usable from mangle table xt_l2tp: missing protocol rule (udp|l2tpip) xt_l2tp: missing protocol rule (udp|l2tpip) sock: sock_set_timeout: `syz-executor2' (pid 24766) tries to set negative timeout sock: sock_set_timeout: `syz-executor2' (pid 24766) tries to set negative timeout netlink: 'syz-executor1': attribute type 16 has an invalid length. netlink: 'syz-executor1': attribute type 16 has an invalid length. semctl(GETNCNT/GETZCNT) is since 3.16 Single Unix Specification compliant. The task syz-executor7 (24851) triggered the difference, watch for misbehavior. PPPIOCDETACH file->f_count=2 PPPIOCDETACH file->f_count=2 netlink: 'syz-executor4': attribute type 21 has an invalid length. kauditd_printk_skb: 134 callbacks suppressed audit: type=1326 audit(1517489261.794:1830): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=25201 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489261.796:1831): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=25201 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=321 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489261.797:1832): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=25201 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 binder: 25211 RLIMIT_NICE not set audit: type=1326 audit(1517489261.797:1833): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=25201 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=257 compat=0 ip=0x453299 code=0x7ffc0000 binder: 25208:25211 Acquire 1 refcount change on invalid ref 0 ret -22 audit: type=1326 audit(1517489261.797:1834): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=25201 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 binder: 25208:25211 BC_REQUEST_DEATH_NOTIFICATION invalid ref 0 binder: 25208:25223 BC_CLEAR_DEATH_NOTIFICATION invalid ref 0 binder: 25223 RLIMIT_NICE not set binder: undelivered death notification, 0000000000000000 audit: type=1326 audit(1517489261.797:1835): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=25201 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=16 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489261.797:1836): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=25201 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489261.797:1837): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=25201 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=55 compat=0 ip=0x453299 code=0x7ffc0000 audit: type=1326 audit(1517489261.797:1838): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=unconfined_u:system_r:insmod_t:s0-s0:c0.c1023 pid=25201 comm="syz-executor1" exe="/root/syz-executor1" sig=0 arch=c000003e syscall=202 compat=0 ip=0x453299 code=0x7ffc0000