====================================================== WARNING: possible circular locking dependency detected 4.13.0-rc6-next-20170825+ #9 Not tainted TCP: request_sock_TCPv6: Possible SYN flooding on port 20005. Sending cookies. Check SNMP counters. ------------------------------------------------------ syz-executor7/3820 is trying to acquire lock: (cpu_hotplug_lock.rw_sem){++++}, at: [] get_online_cpus include/linux/cpu.h:126 [inline] (cpu_hotplug_lock.rw_sem){++++}, at: [] flush_all_backlogs net/core/dev.c:4592 [inline] (cpu_hotplug_lock.rw_sem){++++}, at: [] rollback_registered_many+0x587/0xe80 net/core/dev.c:7127 but task is already holding lock: (rtnl_mutex){+.+.}, at: [] 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: -> #3 (rtnl_mutex){+.+.}: check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x3286/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 __mutex_lock_common kernel/locking/mutex.c:756 [inline] __mutex_lock+0x16f/0x1870 kernel/locking/mutex.c:893 mutex_lock_nested+0x16/0x20 kernel/locking/mutex.c:908 rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72 reg_todo+0xc6/0xbe0 net/wireless/reg.c:2337 process_one_work+0xbfd/0x1be0 kernel/workqueue.c:2098 worker_thread+0x223/0x1860 kernel/workqueue.c:2233 kthread+0x39c/0x470 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 -> #2 (reg_work){+.+.}: process_one_work+0xba5/0x1be0 kernel/workqueue.c:2095 worker_thread+0x223/0x1860 kernel/workqueue.c:2233 kthread+0x39c/0x470 kernel/kthread.c:231 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 0xffffffffffffffff -> #1 ((complete)&rcu.completion){+.+.}: check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x3286/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 complete_acquire include/linux/completion.h:39 [inline] __wait_for_common kernel/sched/completion.c:108 [inline] wait_for_common kernel/sched/completion.c:122 [inline] wait_for_completion+0xc8/0x770 kernel/sched/completion.c:143 __synchronize_srcu+0x1b5/0x250 kernel/rcu/srcutree.c:898 synchronize_srcu_expedited kernel/rcu/srcutree.c:923 [inline] synchronize_srcu+0x1a3/0x560 kernel/rcu/srcutree.c:974 quarantine_remove_cache+0xd7/0xf0 mm/kasan/quarantine.c:327 kasan_cache_shrink+0x9/0x10 mm/kasan/kasan.c:380 kmem_cache_shrink+0x15/0x30 mm/slab_common.c:857 acpi_os_purge_cache+0x15/0x20 drivers/acpi/osl.c:1560 acpi_purge_cached_objects+0x38/0xc9 drivers/acpi/acpica/utxface.c:271 acpi_initialize_objects+0xc5/0x112 drivers/acpi/acpica/utxfinit.c:302 acpi_bus_init drivers/acpi/bus.c:1131 [inline] acpi_init+0x23c/0x8e6 drivers/acpi/bus.c:1220 do_one_initcall+0x9e/0x330 init/main.c:826 do_initcall_level init/main.c:892 [inline] do_initcalls init/main.c:900 [inline] do_basic_setup init/main.c:918 [inline] kernel_init_freeable+0x469/0x521 init/main.c:1066 kernel_init+0x13/0x172 init/main.c:993 ret_from_fork+0x2a/0x40 arch/x86/entry/entry_64.S:431 -> #0 (cpu_hotplug_lock.rw_sem){++++}: check_prev_add+0x865/0x1520 kernel/locking/lockdep.c:1894 check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x3286/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:35 [inline] percpu_down_read include/linux/percpu-rwsem.h:58 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:218 get_online_cpus include/linux/cpu.h:126 [inline] flush_all_backlogs net/core/dev.c:4592 [inline] rollback_registered_many+0x587/0xe80 net/core/dev.c:7127 rollback_registered+0x1be/0x3c0 net/core/dev.c:7183 unregister_netdevice_queue+0x2e3/0x5d0 net/core/dev.c:8171 unregister_netdevice include/linux/netdevice.h:2428 [inline] __tun_detach+0x1020/0x1390 drivers/net/tun.c:576 tun_detach drivers/net/tun.c:587 [inline] tun_chr_close+0x44/0x60 drivers/net/tun.c:2595 __fput+0x333/0x7f0 fs/file_table.c:210 ____fput+0x15/0x20 fs/file_table.c:246 task_work_run+0x199/0x270 kernel/task_work.c:112 exit_task_work include/linux/task_work.h:21 [inline] do_exit+0xa52/0x1b40 kernel/exit.c:865 do_group_exit+0x149/0x400 kernel/exit.c:968 get_signal+0x7e8/0x17e0 kernel/signal.c:2334 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808 exit_to_usermode_loop+0x224/0x300 arch/x86/entry/common.c:158 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath+0x42f/0x500 arch/x86/entry/common.c:266 entry_SYSCALL_64_fastpath+0xbc/0xbe other info that might help us debug this: Chain exists of: cpu_hotplug_lock.rw_sem --> reg_work --> rtnl_mutex Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(rtnl_mutex); lock(reg_work); lock(rtnl_mutex); lock(cpu_hotplug_lock.rw_sem); *** DEADLOCK *** 1 lock held by syz-executor7/3820: #0: (rtnl_mutex){+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72 stack backtrace: CPU: 1 PID: 3820 Comm: syz-executor7 Not tainted 4.13.0-rc6-next-20170825+ #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 print_circular_bug+0x503/0x710 kernel/locking/lockdep.c:1259 check_prev_add+0x865/0x1520 kernel/locking/lockdep.c:1894 check_prevs_add kernel/locking/lockdep.c:2020 [inline] validate_chain kernel/locking/lockdep.c:2469 [inline] __lock_acquire+0x3286/0x4620 kernel/locking/lockdep.c:3498 lock_acquire+0x1d5/0x580 kernel/locking/lockdep.c:4002 percpu_down_read_preempt_disable include/linux/percpu-rwsem.h:35 [inline] percpu_down_read include/linux/percpu-rwsem.h:58 [inline] cpus_read_lock+0x42/0x90 kernel/cpu.c:218 get_online_cpus include/linux/cpu.h:126 [inline] flush_all_backlogs net/core/dev.c:4592 [inline] rollback_registered_many+0x587/0xe80 net/core/dev.c:7127 rollback_registered+0x1be/0x3c0 net/core/dev.c:7183 unregister_netdevice_queue+0x2e3/0x5d0 net/core/dev.c:8171 unregister_netdevice include/linux/netdevice.h:2428 [inline] __tun_detach+0x1020/0x1390 drivers/net/tun.c:576 tun_detach drivers/net/tun.c:587 [inline] tun_chr_close+0x44/0x60 drivers/net/tun.c:2595 __fput+0x333/0x7f0 fs/file_table.c:210 ____fput+0x15/0x20 fs/file_table.c:246 task_work_run+0x199/0x270 kernel/task_work.c:112 exit_task_work include/linux/task_work.h:21 [inline] do_exit+0xa52/0x1b40 kernel/exit.c:865 do_group_exit+0x149/0x400 kernel/exit.c:968 get_signal+0x7e8/0x17e0 kernel/signal.c:2334 do_signal+0x94/0x1ee0 arch/x86/kernel/signal.c:808 exit_to_usermode_loop+0x224/0x300 arch/x86/entry/common.c:158 prepare_exit_to_usermode arch/x86/entry/common.c:197 [inline] syscall_return_slowpath+0x42f/0x500 arch/x86/entry/common.c:266 entry_SYSCALL_64_fastpath+0xbc/0xbe RIP: 0033:0x446749 RSP: 002b:00007fe821e22cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: fffffffffffffe00 RBX: 0000000000708020 RCX: 0000000000446749 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000708020 RBP: 0000000000708000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe821e239c0 R15: 00007fe821e23700 sctp: [Deprecated]: syz-executor3 (pid 3834) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor3 (pid 3859) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead device  entered promiscuous mode device  left promiscuous mode device  entered promiscuous mode audit: type=1326 audit(1503885586.328:8): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=3985 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 audit: type=1326 audit(1503885586.337:9): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=3985 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 TCP: request_sock_TCP: Possible SYN flooding on port 20008. Sending cookies. Check SNMP counters. netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 8 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 16 bytes leftover after parsing attributes in process `syz-executor3'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=14917 sclass=netlink_route_socket pig=4106 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=14917 sclass=netlink_route_socket pig=4117 comm=syz-executor3 raw_sendmsg: syz-executor2 forgot to set AF_INET. Fix it! kvm [4181]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008f kvm [4181]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008e kvm [4181]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008d kvm [4181]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008c kvm [4181]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008b kvm [4181]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008a kvm [4181]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000089 kvm [4181]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000088 kvm [4181]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000087 kvm [4181]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000086 kvm [4181]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000023 data 0x66c900003b9a1043 kvm [4181]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000022 data 0x66c90000cb211043 kvm [4181]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000023 data 0x66c900003b9a1043 kvm [4181]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000022 data 0x66c90000cb211043 kvm [4181]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000020 data 0x66c90000000e1043 kvm: vcpu 0: requested 316 ns lapic timer period limited to 500000 ns kvm: vcpu 0: requested 316 ns lapic timer period limited to 500000 ns syz-executor7 uses obsolete (PF_INET,SOCK_PACKET) netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. *** Guest State *** CR0: actual=0x0000000080000039, shadow=0x00000000e0000019, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002050, shadow=0x0000000000000010, gh_mask=ffffffffffffe871 CR3 = 0x0000000000004000 RSP = 0x0000000000000f80 RIP = 0x0000000000009104 RFLAGS=0x00020002 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000f80 CS:RIP=0030:0000000000002810 CS: sel=0x0030, attr=0x0409b, limit=0x000fffff, base=0x0000000000000000 DS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 SS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 ES: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 FS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. GS: sel=0x0038, attr=0x04093, limit=0x000fffff, base=0x0000000000000000 GDTR: limit=0x000007ff, base=0x0000000000001000 LDTR: sel=0x0008, attr=0x04082, limit=0x000007ff, base=0x0000000000001800 IDTR: limit=0x000001ff, base=0x0000000000003800 TR: sel=0x00d0, attr=0x0008b, limit=0x000001ff, base=0x0000000000004e00 EFER = 0x0000000000000001 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 BndCfgS = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811b8fd7 RSP = 0xffff880051caf4c8 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f4b861af700 GSBase=ffff88006df00000 TRBase=ffff88003ec23100 GDTBase=ffffffffff577000 IDTBase=ffffffffff57b000 CR0=0000000080050033 CR3=0000000067e88000 CR4=00000000000026e0 Sysenter RSP=0000000000000000 CS:RIP=0010:ffffffff84da5a70 EFER = 0x0000000000000d01 PAT = 0x0007040600070406 *** Control State *** PinBased=0000003f CPUBased=b6a06dfa SecondaryExec=000000e3 EntryControls=0001d1ff ExitControls=00afefff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=00000000 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000001 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffddc6f4597a TPR Threshold = 0x00 EPT pointer = 0x000000006843b01e Virtual processor ID = 0x0027 capability: warning: `syz-executor2' uses 32-bit capabilities (legacy support in use) audit: type=1326 audit(1503885587.603:10): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4484 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 audit: type=1326 audit(1503885587.654:11): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4484 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 netlink: 2 bytes leftover after parsing attributes in process `syz-executor0'. device lo entered promiscuous mode netlink: 2 bytes leftover after parsing attributes in process `syz-executor0'. kauditd_printk_skb: 2 callbacks suppressed audit: type=1326 audit(1503885587.938:14): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4588 comm="syz-executor0" exe="/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 audit: type=1326 audit(1503885588.036:15): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4588 comm="syz-executor0" exe="/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 netlink: 5 bytes leftover after parsing attributes in process `syz-executor3'. do_dccp_setsockopt: sockopt(CHANGE_L/R) is deprecated: fix your app audit: type=1326 audit(1503885588.293:16): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4705 comm="syz-executor6" exe="/syz-executor6" sig=9 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 audit: type=1326 audit(1503885588.363:17): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4705 comm="syz-executor6" exe="/syz-executor6" sig=9 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 do_dccp_setsockopt: sockopt(CHANGE_L/R) is deprecated: fix your app device syz4 entered promiscuous mode device syz4 left promiscuous mode device syz4 entered promiscuous mode nla_parse: 3 callbacks suppressed netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor4'. kvm [4878]: vcpu0, guest rIP: 0x9110 Hyper-V uhandled wrmsr: 0x4000008f data 0x4d1ba6600a9 kvm [4878]: vcpu0, guest rIP: 0x9110 Hyper-V uhandled wrmsr: 0x4000008e data 0x4d1ba6600a9 kvm [4878]: vcpu0, guest rIP: 0x9110 Hyper-V uhandled wrmsr: 0x4000008d data 0x4d1ba6600a9 kvm [4878]: vcpu0, guest rIP: 0x9110 Hyper-V uhandled wrmsr: 0x4000008c data 0x4d1ba6600a9 kvm [4878]: vcpu0, guest rIP: 0x9110 Hyper-V uhandled wrmsr: 0x4000008b data 0x4d1ba6600a9 kvm [4878]: vcpu0, guest rIP: 0x9110 Hyper-V uhandled wrmsr: 0x4000008a data 0x4d1ba6600a9 kvm [4878]: vcpu0, guest rIP: 0x9110 Hyper-V uhandled wrmsr: 0x40000020 data 0x4d1ba6600a9 audit: type=1326 audit(1503885588.947:18): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4929 comm="syz-executor5" exe="/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 audit: type=1326 audit(1503885589.060:19): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4929 comm="syz-executor5" exe="/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 QAT: Invalid ioctl QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=0 nlmsg_type=14606 sclass=netlink_route_socket pig=5125 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=14606 sclass=netlink_route_socket pig=5148 comm=syz-executor3 PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=5288 comm=syz-executor6 device lo entered promiscuous mode SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=5288 comm=syz-executor6 *** Guest State *** CR0: actual=0x0000000000000024, shadow=0x0000000000000004, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002050, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x0000000100000000 RIP = 0x000000000010f002 RFLAGS=0xfffffffffffffffe DR7 = 0x0000000000000400 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 CS: sel=0x0000, attr=0x10000, limit=0x00017004, base=0x0000000000000004 DS: sel=0x0003, attr=0x10000, limit=0x00015000, base=0x0000000000004000 SS: sel=0x000d, attr=0x10000, limit=0x00003000, base=0x0000000000100000 ES: sel=0x000d, attr=0x030a1, limit=0x00005000, base=0x0000000000000002 FS: sel=0x000d, attr=0x10000, limit=0x00003000, base=0x0000000000006000 GS: sel=0x0000, attr=0x10000, limit=0x00007000, base=0x0000000000016000 GDTR: limit=0x0000f000, base=0x0000000000103006 LDTR: sel=0x0003, attr=0x10000, limit=0x00005000, base=0x0000000000010000 IDTR: limit=0x0000d000, base=0x0000000000001000 TR: sel=0x000f, attr=0x05099, limit=0x00103000, base=0x0000000000001000 EFER = 0x0000000000004000 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 BndCfgS = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811b8fd7 RSP = 0xffff8800516bf4c8 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007fe160c17700 GSBase=ffff88003ed00000 TRBase=ffff88003ed23100 GDTBase=ffffffffff576000 IDTBase=ffffffffff57b000 CR0=0000000080050033 CR3=0000000053b68000 CR4=00000000000026e0 Sysenter RSP=0000000000000000 CS:RIP=0010:ffffffff84da5a70 EFER = 0x0000000000000d01 PAT = 0x0007040600070406 *** Control State *** PinBased=0000003f CPUBased=b6a1edfa SecondaryExec=000000e3 EntryControls=0001d1ff ExitControls=00afefff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=80000001 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 *** Guest State *** CR0: actual=0x0000000000000024, shadow=0x0000000000000004, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002050, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x0000000100000000 RIP = 0x000000000010f002 RFLAGS=0xfffffffffffffffe DR7 = 0x0000000000000400 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 CS: sel=0x0000, attr=0x10000, limit=0x00017004, base=0x0000000000000004 DS: sel=0x0003, attr=0x10000, limit=0x00015000, base=0x0000000000004000 SS: sel=0x000d, attr=0x10000, limit=0x00003000, base=0x0000000000100000 ES: sel=0x000d, attr=0x030a1, limit=0x00005000, base=0x0000000000000002 FS: sel=0x000d, attr=0x10000, limit=0x00003000, base=0x0000000000006000 GS: sel=0x0000, attr=0x10000, limit=0x00007000, base=0x0000000000016000 GDTR: limit=0x0000f000, base=0x0000000000103006 LDTR: sel=0x0003, attr=0x10000, limit=0x00005000, base=0x0000000000010000 IDTR: limit=0x0000d000, base=0x0000000000001000 TR: sel=0x000f, attr=0x05099, limit=0x00103000, base=0x0000000000001000 EFER = 0x0000000000004000 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 BndCfgS = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811b8fd7 RSP = 0xffff880055b9f4c8 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007fe160bf4700 GSBase=ffff88006de00000 TRBase=ffff88006de23100 GDTBase=ffffffffff575000 IDTBase=ffffffffff57b000 CR0=0000000080050033 CR3=0000000053b68000 CR4=00000000000026e0 Sysenter RSP=0000000000000000 CS:RIP=0010:ffffffff84da5a70 EFER = 0x0000000000000d01 PAT = 0x0007040600070406 *** Control State *** PinBased=0000003f CPUBased=b6a1edfa SecondaryExec=000000e3 EntryControls=0001d1ff ExitControls=00afefff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=80000001 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffdb955c9884 TPR Threshold = 0x00 EPT pointer = 0x000000005454101e Virtual processor ID = 0x0039 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffdb9ceeb4f6 TPR Threshold = 0x00 EPT pointer = 0x000000003aab401e Virtual processor ID = 0x0037 netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor1'. NFS: bad mount option value specified: v; rfkill: input handler disabled rfkill: input handler enabled netlink: 3 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor0'. rfkill: input handler disabled netlink: 3 bytes leftover after parsing attributes in process `syz-executor0'. rfkill: input handler enabled NFS: bad mount option value specified: v; audit: type=1326 audit(1503885590.491:20): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=5511 comm="syz-executor1" exe="/syz-executor1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 audit: type=1326 audit(1503885590.592:21): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=5511 comm="syz-executor1" exe="/syz-executor1" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=88 sclass=netlink_audit_socket pig=5643 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=88 sclass=netlink_audit_socket pig=5648 comm=syz-executor6 QAT: Invalid ioctl QAT: Invalid ioctl mmap: syz-executor0 (5688): VmData 16941056 exceed data ulimit 0. Update limits or use boot option ignore_rlimit_data. QAT: Invalid ioctl QAT: Invalid ioctl FAULT_FLAG_ALLOW_RETRY missing 70 CPU: 0 PID: 5742 Comm: syz-executor5 Not tainted 4.13.0-rc6-next-20170825+ #9 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS Bochs 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:16 [inline] dump_stack+0x194/0x257 lib/dump_stack.c:52 handle_userfault+0x11ec/0x2390 fs/userfaultfd.c:427 do_anonymous_page mm/memory.c:3095 [inline] handle_pte_fault mm/memory.c:3908 [inline] __handle_mm_fault+0x2d46/0x39c0 mm/memory.c:4034 handle_mm_fault+0x3bb/0x860 mm/memory.c:4071 __do_page_fault+0x4f6/0xb60 arch/x86/mm/fault.c:1445 trace_do_page_fault+0x141/0x730 arch/x86/mm/fault.c:1538 do_async_page_fault+0x72/0xc0 arch/x86/kernel/kvm.c:266 async_page_fault+0x22/0x30 arch/x86/entry/entry_64.S:1093 RIP: 0033:0x4301cf RSP: 002b:00007eff9ded27c0 EFLAGS: 00010206 RAX: 0000000000000000 RBX: 00007eff9ded27f0 RCX: 00007eff9ded27ef RDX: 0000000000000400 RSI: 0000000020012ff7 RDI: 00007eff9ded27f0 RBP: 0000000000708000 R08: 0000000000000000 R09: 0000000000000100 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000000056f0 R14: 00000000006e77b0 R15: 000020000000a5ae SELinux: unrecognized netlink message: protocol=9 nlmsg_type=32 sclass=netlink_audit_socket pig=5794 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=32 sclass=netlink_audit_socket pig=5810 comm=syz-executor3 capability: warning: `syz-executor5' uses deprecated v2 capabilities in a way that may be insecure audit: type=1326 audit(1503885591.607:22): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=5900 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 PF_BRIDGE: RTM_SETLINK with unknown ifindex PF_BRIDGE: RTM_SETLINK with unknown ifindex QAT: Invalid ioctl QAT: Invalid ioctl 9pnet_virtio: no channels available for device ./control sg_write: data in/out 327644/2 bytes for SCSI command 0x0-- guessing data in; program syz-executor0 not setting count and/or reply_len properly sg_write: data in/out 327644/2 bytes for SCSI command 0x0-- guessing data in; program syz-executor0 not setting count and/or reply_len properly SELinux: unrecognized netlink message: protocol=0 nlmsg_type=5 sclass=netlink_route_socket pig=6181 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6181 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=128 sclass=netlink_route_socket pig=6208 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=5 sclass=netlink_route_socket pig=6208 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6208 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=128 sclass=netlink_route_socket pig=6213 comm=syz-executor2 RDS: rds_bind could not find a transport for 255.255.255.255, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 255.255.255.255, load rds_tcp or rds_rdma? kauditd_printk_skb: 1 callbacks suppressed audit: type=1326 audit(1503885593.309:24): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=6353 comm="syz-executor7" exe="/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 pit: kvm: requested 2514 ns i8254 timer period limited to 500000 ns pit: kvm: requested 2514 ns i8254 timer period limited to 500000 ns audit: type=1326 audit(1503885593.374:25): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=6364 comm="syz-executor5" exe="/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 audit: type=1326 audit(1503885593.426:26): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=6353 comm="syz-executor7" exe="/syz-executor7" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 audit: type=1326 audit(1503885593.474:27): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=6364 comm="syz-executor5" exe="/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 sctp: [Deprecated]: syz-executor3 (pid 6512) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor3 (pid 6532) Use of int in maxseg socket option. Use struct sctp_assoc_value instead SELinux: unrecognized netlink message: protocol=6 nlmsg_type=65535 sclass=netlink_xfrm_socket pig=6648 comm=syz-executor3 nla_parse: 19 callbacks suppressed netlink: 60 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 4052 bytes leftover after parsing attributes in process `syz-executor3'. SELinux: unrecognized netlink message: protocol=9 nlmsg_type=32 sclass=netlink_audit_socket pig=6666 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=6 nlmsg_type=65535 sclass=netlink_xfrm_socket pig=6657 comm=syz-executor3 SELinux: unrecognized netlink message: protocol=9 nlmsg_type=32 sclass=netlink_audit_socket pig=6670 comm=syz-executor6 netlink: 1 bytes leftover after parsing attributes in process `syz-executor2'. IPv6: NLM_F_REPLACE set, but no existing node found! device lo entered promiscuous mode netlink: 1 bytes leftover after parsing attributes in process `syz-executor2'. IPv6: NLM_F_REPLACE set, but no existing node found! print_req_error: I/O error, dev loop3, sector 0 Buffer I/O error on dev loop3, logical block 0, lost async page write netlink: 11 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor2'. sctp: [Deprecated]: syz-executor5 (pid 6860) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor5 (pid 6867) Use of int in maxseg socket option. Use struct sctp_assoc_value instead