BUG: MAX_LOCKDEP_CHAINS too low! turning off the locking correctness validator. CPU: 0 PID: 26692 Comm: syz-executor.4 Not tainted 4.14.231-syzkaller #0 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+0x1b2/0x281 lib/dump_stack.c:58 add_chain_cache kernel/locking/lockdep.c:2303 [inline] lookup_chain_cache_add kernel/locking/lockdep.c:2415 [inline] validate_chain kernel/locking/lockdep.c:2435 [inline] __lock_acquire.cold+0x19a/0x97c kernel/locking/lockdep.c:3491 lock_acquire+0x170/0x3f0 kernel/locking/lockdep.c:3998 __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:152 spin_lock include/linux/spinlock.h:317 [inline] __dev_xmit_skb net/core/dev.c:3200 [inline] __dev_queue_xmit+0x1108/0x2480 net/core/dev.c:3489 neigh_hh_output include/net/neighbour.h:490 [inline] neigh_output include/net/neighbour.h:498 [inline] ip_finish_output2+0x9db/0x1340 net/ipv4/ip_output.c:230 ip_finish_output+0x37c/0xc50 net/ipv4/ip_output.c:318 NF_HOOK_COND include/linux/netfilter.h:239 [inline] ip_output+0x1cd/0x510 net/ipv4/ip_output.c:406 dst_output include/net/dst.h:470 [inline] ip_local_out+0x93/0x170 net/ipv4/ip_output.c:125 ip_queue_xmit+0x7d3/0x1a80 net/ipv4/ip_output.c:505 sctp_packet_transmit+0x1c27/0x3000 net/sctp/output.c:637 sctp_outq_flush+0xc59/0x30a0 net/sctp/outqueue.c:1187 sctp_cmd_interpreter net/sctp/sm_sideeffect.c:1308 [inline] sctp_side_effects net/sctp/sm_sideeffect.c:1179 [inline] sctp_do_sm+0x393b/0x4c70 net/sctp/sm_sideeffect.c:1150 sctp_primitive_ABORT+0x9b/0xc0 net/sctp/primitive.c:119 sctp_close+0x23d/0x710 net/sctp/socket.c:1575 audit: type=1800 audit(1619140478.343:644): pid=26708 uid=0 auid=4294967295 ses=4294967295 op="collect_data" cause="failed(directio)" comm="syz-executor.3" name=".log" dev="sda1" ino=15300 res=0 inet_release+0xdf/0x1b0 net/ipv4/af_inet.c:425 __sock_release+0xcd/0x2b0 net/socket.c:602 sock_close+0x15/0x20 net/socket.c:1139 __fput+0x25f/0x7a0 fs/file_table.c:210 task_work_run+0x11f/0x190 kernel/task_work.c:113 tracehook_notify_resume include/linux/tracehook.h:191 [inline] exit_to_usermode_loop+0x1ad/0x200 arch/x86/entry/common.c:164 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline] syscall_return_slowpath arch/x86/entry/common.c:270 [inline] do_syscall_64+0x4a3/0x640 arch/x86/entry/common.c:297 entry_SYSCALL_64_after_hwframe+0x46/0xbb RIP: 0033:0x41940b RSP: 002b:00007ffeb504e050 EFLAGS: 00000293 ORIG_RAX: 0000000000000003 RAX: 0000000000000000 RBX: 0000000000000008 RCX: 000000000041940b RDX: 0000000000571e30 RSI: 0000000008907179 RDI: 0000000000000007 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000001b2f326b10 R10: 00007ffeb504e140 R11: 0000000000000293 R12: 000000000013d5c4 R13: 00000000000003e8 R14: 000000000056bf60 R15: 000000000013d571 kvm [26709]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x40000061 kvm [26709]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x4000000e kvm [26709]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x4000004b kvm [26709]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x4000007c kvm [26709]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x40000045 kvm [26709]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x40000068 kvm [26709]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x40000027 kvm [26709]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000020 data 0x2db731 kvm [26709]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x40000057 kvm [26709]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x40000032 kvm [26709]: vcpu0, guest rIP: 0x145 Hyper-V unhandled rdmsr: 0x4000004b IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready kvm [26778]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000020 data 0x8e66d kvm [26778]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000023 data 0x3b9aca01 IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready kvm [26816]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000020 data 0xb4e89 IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready kvm [26816]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000020 data 0x13a8a4 IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready kvm [26861]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000020 data 0xabc52 IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready kvm [26861]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000020 data 0x19f577 kvm [26861]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000022 data 0x89173701 kvm [26861]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000023 data 0x3b9aca01 kvm [26861]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000022 data 0x89173701 IPv6: ADDRCONF(NETDEV_CHANGE): lo: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vxcan1: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): veth0_vlan: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan0: link becomes ready IPv6: ADDRCONF(NETDEV_CHANGE): vlan1: link becomes ready arp_tables: arptables: counters copy to user failed while replacing table arp_tables: arptables: counters copy to user failed while replacing table PF_BRIDGE: br_mdb_parse() with unknown ifindex PF_BRIDGE: br_mdb_parse() with unknown ifindex PF_BRIDGE: br_mdb_parse() with unknown ifindex PF_BRIDGE: br_mdb_parse() with unknown ifindex PF_BRIDGE: br_mdb_parse() with unknown ifindex PF_BRIDGE: br_mdb_parse() with unknown ifindex PF_BRIDGE: br_mdb_parse() with unknown ifindex PF_BRIDGE: br_mdb_parse() with unknown ifindex EXT4-fs (loop1): couldn't mount RDWR because of unsupported optional features (8000) kvm [27394]: vcpu0, guest rIP: 0x13c Hyper-V uhandled wrmsr: 0x40000029 data 0x6 kvm [27394]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x4000002b data 0x28 kvm [27394]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000015 data 0x2a kvm [27394]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000017 data 0x14 kvm [27394]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000050 data 0xaf kvm [27394]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x4000002c data 0x51 kvm [27394]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000066 data 0xe3 kvm [27394]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x4000008f data 0xc0 kvm [27394]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x40000007 data 0x8e kvm [27394]: vcpu0, guest rIP: 0x14c Hyper-V uhandled wrmsr: 0x4000005c data 0xd6 VFS: could not find a valid V7 on loop1. print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1, logical block 0, async page read VFS: could not find a valid V7 on loop1. print_req_error: I/O error, dev loop1, sector 0 Buffer I/O error on dev loop1, logical block 0, async page read