====================================================== WARNING: possible circular locking dependency detected 4.13.0-rc6-next-20170825+ #9 Not tainted ------------------------------------------------------ syz-executor2/3706 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] unregister_netdev+0x1c/0x30 net/core/dev.c:8212 sirdev_put_instance+0x240/0x350 drivers/net/irda/sir_dev.c:961 irtty_close+0xb1/0x1c0 drivers/net/irda/irtty-sir.c:512 tty_ldisc_close.isra.0+0x99/0xd0 drivers/tty/tty_ldisc.c:490 tty_set_ldisc+0x1b6/0x7a0 drivers/tty/tty_ldisc.c:588 tiocsetd drivers/tty/tty_io.c:2220 [inline] tty_ioctl+0x48a/0x15f0 drivers/tty/tty_io.c:2464 vfs_ioctl fs/ioctl.c:45 [inline] do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685 SYSC_ioctl fs/ioctl.c:700 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 entry_SYSCALL_64_fastpath+0x1f/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 *** 3 locks held by syz-executor2/3706: #0: (&tty->legacy_mutex){+.+.}, at: [] tty_lock+0x5d/0x90 drivers/tty/tty_mutex.c:18 #1: (&tty->ldisc_sem){++++}, at: [] ldsem_down_write+0x37/0x3c drivers/tty/tty_ldsem.c:393 #2: (rtnl_mutex){+.+.}, at: [] rtnl_lock+0x17/0x20 net/core/rtnetlink.c:72 stack backtrace: CPU: 2 PID: 3706 Comm: syz-executor2 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] unregister_netdev+0x1c/0x30 net/core/dev.c:8212 sirdev_put_instance+0x240/0x350 drivers/net/irda/sir_dev.c:961 irtty_close+0xb1/0x1c0 drivers/net/irda/irtty-sir.c:512 tty_ldisc_close.isra.0+0x99/0xd0 drivers/tty/tty_ldisc.c:490 tty_set_ldisc+0x1b6/0x7a0 drivers/tty/tty_ldisc.c:588 tiocsetd drivers/tty/tty_io.c:2220 [inline] tty_ioctl+0x48a/0x15f0 drivers/tty/tty_io.c:2464 vfs_ioctl fs/ioctl.c:45 [inline] do_vfs_ioctl+0x1b1/0x1530 fs/ioctl.c:685 SYSC_ioctl fs/ioctl.c:700 [inline] SyS_ioctl+0x8f/0xc0 fs/ioctl.c:691 entry_SYSCALL_64_fastpath+0x1f/0xbe RIP: 0033:0x446749 RSP: 002b:00007f74a271fc08 EFLAGS: 00000282 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000006 RCX: 0000000000446749 RDX: 0000000020010000 RSI: 0000000000005423 RDI: 0000000000000006 RBP: 0000000000000086 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000282 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f74a27209c0 R15: 00007f74a2720700 QAT: Invalid ioctl QAT: Invalid ioctl TCP: request_sock_TCPv6: Possible SYN flooding on port 20021. Sending cookies. Check SNMP counters. netlink: 2 bytes leftover after parsing attributes in process `syz-executor6'. netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 2 bytes leftover after parsing attributes in process `syz-executor6'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=3 sclass=netlink_route_socket pig=3884 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=3884 comm=syz-executor6 netlink: 11 bytes leftover after parsing attributes in process `syz-executor0'. SELinux: unrecognized netlink message: protocol=0 nlmsg_type=51 sclass=netlink_route_socket pig=3884 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=3884 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=3914 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=3 sclass=netlink_route_socket pig=3905 comm=syz-executor6 netlink: 13 bytes leftover after parsing attributes in process `syz-executor5'. device lo entered promiscuous mode devpts: called with bogus options capability: warning: `syz-executor2' uses deprecated v2 capabilities in a way that may be insecure sctp: [Deprecated]: syz-executor0 (pid 4115) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead ata1.00: non-matching transfer count (256/92) sctp: [Deprecated]: syz-executor0 (pid 4143) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead ata1.00: non-matching transfer count (256/92) 9pnet_virtio: no channels available for device ./bus 9pnet_virtio: no channels available for device ./bus sctp: [Deprecated]: syz-executor5 (pid 4154) Use of int in max_burst socket option. Use struct sctp_assoc_value instead *** Guest State *** CR0: actual=0x0000000000000030, shadow=0x0000000060000010, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002050, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x0000000000000002 RIP = 0x0000000000006000 RFLAGS=0x00000300 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 CS: sel=0xf000, attr=0x0009b, limit=0x0000ffff, base=0x00000000ffff0000 DS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 SS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 ES: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 FS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 GS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 GDTR: limit=0x0000ffff, base=0x0000000000000000 LDTR: sel=0x0000, attr=0x00082, limit=0x0000ffff, base=0x0000000000000000 IDTR: limit=0x0000ffff, base=0x0000000000000000 TR: sel=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000 EFER = 0x0000000000000000 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 BndCfgS = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811b8fd7 RSP = 0xffff88006d30f4c8 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f05db300700 GSBase=ffff88006de00000 TRBase=ffff88006de23100 GDTBase=ffffffffff575000 IDTBase=ffffffffff57b000 CR0=0000000080050033 CR3=00000000682e3000 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=00000000 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffe397f0d6f2 TPR Threshold = 0x00 EPT pointer = 0x0000000055b9201e Virtual processor ID = 0x001a sctp: [Deprecated]: syz-executor5 (pid 4154) Use of int in max_burst socket option. Use struct sctp_assoc_value instead *** Guest State *** CR0: actual=0x0000000000000030, shadow=0x0000000060000010, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002050, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x0000000000000002 RIP = 0x0000000000006000 RFLAGS=0x00000300 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 CS: sel=0xf000, attr=0x0009b, limit=0x0000ffff, base=0x00000000ffff0000 DS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 SS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 ES: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 FS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 GS: sel=0x0000, attr=0x00093, limit=0x0000ffff, base=0x0000000000000000 GDTR: limit=0x0000ffff, base=0x0000000000000000 LDTR: sel=0x0000, attr=0x00082, limit=0x0000ffff, base=0x0000000000000000 IDTR: limit=0x0000ffff, base=0x0000000000000000 TR: sel=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000 EFER = 0x0000000000000000 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 BndCfgS = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811b8fd7 RSP = 0xffff88006ce8f4c8 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f05db2dd700 GSBase=ffff88006de00000 TRBase=ffff88006de23100 GDTBase=ffffffffff575000 IDTBase=ffffffffff57b000 CR0=0000000080050033 CR3=00000000682e3000 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=00000000 errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000000 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffe392040f30 TPR Threshold = 0x00 EPT pointer = 0x0000000068d6f01e Virtual processor ID = 0x001e device lo entered promiscuous mode audit: type=1326 audit(1503780356.130:6): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4237 comm="syz-executor5" exe="/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 capability: warning: `syz-executor4' uses 32-bit capabilities (legacy support in use) *** Guest State *** CR0: actual=0x0000000000000030, shadow=0x0000000060000010, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002050, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x0000000000000002 RIP = 0x0000000000006000 RFLAGS=0x00000300 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 CS: sel=0x0010, attr=0x0009b, limit=0x000fffff, base=0x0000000000000000 DS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 SS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 ES: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 FS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 GS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 GDTR: limit=0x000007ff, base=0x0000000000001000 LDTR: sel=0x0008, attr=0x04082, limit=0x000007ff, base=0x0000000000001800 IDTR: limit=0x0000ffff, base=0x0000000000000000 TR: sel=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000 EFER = 0x0000000000000000 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 BndCfgS = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811b8fd7 RSP = 0xffff88003935f4c8 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f81c2d50700 GSBase=ffff88006df00000 TRBase=ffff88006df23100 GDTBase=ffffffffff574000 IDTBase=ffffffffff57b000 CR0=0000000080050033 CR3=0000000069f5a000 CR4=00000000000026e0 Sysenter RSP=0000000000000000 CS:RIP=0010:ffffffff84da5a70 EFER = 0x0000000000000d01 PAT = 0x0007040600070406 *** Control State *** PinBased=0000003f CPUBased=b699edfa SecondaryExec=000000e2 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=00000000 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 audit: type=1326 audit(1503780356.187:7): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4237 comm="syz-executor5" exe="/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 TSC Offset = 0xffffffe38138c1c4 EPT pointer = 0x000000006c10601e Virtual processor ID = 0x001a device lo entered promiscuous mode kvm: MWAIT instruction emulated as NOP! kvm: MONITOR instruction emulated as NOP! audit: type=1326 audit(1503780356.476:8): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4447 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 audit: type=1326 audit(1503780356.525:9): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4447 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 IPv6: NLM_F_REPLACE set, but no existing node found! kvm [4470]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008f kvm [4470]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008e kvm [4470]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008d kvm [4470]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008c kvm [4470]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008b kvm [4470]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x4000008a kvm [4470]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000089 kvm [4470]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000088 IPv6: NLM_F_REPLACE set, but no existing node found! kvm [4470]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000087 kvm [4470]: vcpu0, guest rIP: 0x9135 Hyper-V unhandled rdmsr: 0x40000086 kvm [4470]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000023 data 0x66c900003b9a1043 kvm [4470]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000022 data 0x66c90000cb211043 kvm [4470]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000023 data 0x66c900003b9a1043 kvm [4470]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000022 data 0x66c90000cb211043 kvm [4470]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000020 data 0x66c9000000061043 kvm: vcpu 0: requested 316 ns lapic timer period limited to 500000 ns kvm [4470]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000023 data 0x66c900003b9a1043 kvm [4470]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000022 data 0x66c90000cb211043 kvm [4470]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000023 data 0x66c900003b9a1043 kvm [4470]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000022 data 0x66c90000cb211043 kvm [4470]: vcpu0, guest rIP: 0x9112 Hyper-V uhandled wrmsr: 0x40000020 data 0x66c90000000b1043 kvm: vcpu 0: requested 316 ns lapic timer period limited to 500000 ns syz-executor0 uses obsolete (PF_INET,SOCK_PACKET) sctp: [Deprecated]: syz-executor2 (pid 4698) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor2 (pid 4731) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor5 (pid 4743) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor5 (pid 4759) Use of int in maxseg socket option. Use struct sctp_assoc_value instead device lo entered promiscuous mode audit: type=1326 audit(1503780357.308:10): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4762 comm="syz-executor5" exe="/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 device lo left promiscuous mode device lo entered promiscuous mode device lo left promiscuous mode audit: type=1326 audit(1503780357.351:11): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=4762 comm="syz-executor5" exe="/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 sctp: [Deprecated]: syz-executor0 (pid 4943) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead 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? sctp: [Deprecated]: syz-executor0 (pid 5002) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead sctp: [Deprecated]: syz-executor3 (pid 5087) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead hid-generic 0003:0627:0001.0001: pid 5041 passed too large report sctp: [Deprecated]: syz-executor3 (pid 5087) Use of struct sctp_assoc_value in delayed_ack socket option. Use struct sctp_sack_info instead semctl(GETNCNT/GETZCNT) is since 3.16 Single Unix Specification compliant. The task syz-executor6 (5189) triggered the difference, watch for misbehavior. tc_dump_action: action bad kind PF_BRIDGE: br_mdb_parse() with invalid ifindex PF_BRIDGE: br_mdb_parse() with invalid ifindex rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl *** Guest State *** CR0: actual=0x0000000000000031, shadow=0x0000000060000011, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000002050, shadow=0x0000000000000000, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x0000000000000f80 RIP = 0x0000000000000000 RFLAGS=0x003cf702 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 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=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000 EFER = 0x0000000000000001 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 BndCfgS = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811b8fd7 RSP = 0xffff880055767378 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f05db300700 GSBase=ffff88003ed00000 TRBase=ffff88003ed23100 GDTBase=ffffffffff576000 IDTBase=ffffffffff57b000 CR0=0000000080050033 CR3=0000000038870000 CR4=00000000000026e0 Sysenter RSP=0000000000000000 CS:RIP=0010:ffffffff84da5a70 EFER = 0x0000000000000d01 PAT = 0x0007040600070406 *** Control State *** PinBased=0000007f CPUBased=b6a1edfa SecondaryExec=000000e3 EntryControls=0001d1ff ExitControls=00afefff ExceptionBitmap=00060042 PFECmask=00000000 PFECmatch=00000000 VMEntry: intr_info=800000fc errcode=00000000 ilen=00000000 VMExit: intr_info=00000000 errcode=00000000 ilen=00000004 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffe1a73abc44 TPR Threshold = 0x00 EPT pointer = 0x000000003de4901e Virtual processor ID = 0x0045 RDS: rds_bind could not find a transport for 224.0.0.1, load rds_tcp or rds_rdma? RDS: rds_bind could not find a transport for 224.0.0.1, load rds_tcp or rds_rdma? device syz5 entered promiscuous mode device syz5 left promiscuous mode device syz5 entered promiscuous mode rpcbind: RPC call returned error 22 rpcbind: RPC call returned error 22 kauditd_printk_skb: 5 callbacks suppressed audit: type=1326 audit(1503780358.765:17): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=5640 comm="syz-executor5" exe="/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 audit: type=1326 audit(1503780358.843:18): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=5640 comm="syz-executor5" exe="/syz-executor5" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 dccp_invalid_packet: P.Data Offset(4) too small dccp_invalid_packet: P.Data Offset(4) too small sctp: [Deprecated]: syz-executor1 (pid 5824) Use of int in maxseg socket option. Use struct sctp_assoc_value instead dccp_v6_rcv: dropped packet with invalid checksum QAT: Invalid ioctl dccp_v6_rcv: dropped packet with invalid checksum QAT: Invalid ioctl sctp: [Deprecated]: syz-executor1 (pid 5872) Use of int in maxseg socket option. Use struct sctp_assoc_value instead audit: type=1326 audit(1503780359.372:19): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=5889 comm="syz-executor0" exe="/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 TCP: request_sock_TCPv6: Possible SYN flooding on port 20017. Sending cookies. Check SNMP counters. nla_parse: 34 callbacks suppressed netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor3'. audit: type=1326 audit(1503780359.460:20): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=5889 comm="syz-executor0" exe="/syz-executor0" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 netlink: 3 bytes leftover after parsing attributes in process `syz-executor3'. netlink: 1 bytes leftover after parsing attributes in process `syz-executor3'. PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex TCP: request_sock_TCP: Possible SYN flooding on port 20024. Sending cookies. Check SNMP counters. loop_reread_partitions: partition scan of loop0 (-\t@r9hxGQ:[il L*@R-Tr-x) failed (rc=-13) print_req_error: I/O error, dev loop0, sector 0 print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read PF_BRIDGE: RTM_NEWNEIGH with unknown ifindex print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read print_req_error: I/O error, dev loop0, sector 0 Buffer I/O error on dev loop0, logical block 0, async page read Buffer I/O error on dev loop0, logical block 0, async page read QAT: Invalid ioctl QAT: Invalid ioctl selinux_nlmsg_perm: 15 callbacks suppressed SELinux: unrecognized netlink message: protocol=4 nlmsg_type=30 sclass=netlink_tcpdiag_socket pig=6110 comm=syz-executor2 netlink: 5 bytes leftover after parsing attributes in process `syz-executor7'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor7'. RDS: rds_bind could not find a transport for 172.20.6.187, load rds_tcp or rds_rdma? netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. netlink: 3 bytes leftover after parsing attributes in process `syz-executor2'. QAT: Invalid ioctl QAT: Invalid ioctl *** Guest State *** CR0: actual=0x0000000000000030, shadow=0x0000000060000010, gh_mask=fffffffffffffff7 CR4: actual=0x0000000000022050, shadow=0x0000000000020000, gh_mask=ffffffffffffe871 CR3 = 0x00000000fffbc000 RSP = 0x0000000000000f80 RIP = 0x0000000000000000 RFLAGS=0x00000002 DR7 = 0x0000000000000400 Sysenter RSP=0000000000000000 CS:RIP=0000:0000000000000000 CS: sel=0x0010, attr=0x0009b, limit=0x000fffff, base=0x0000000000000000 DS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 SS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 device  entered promiscuous mode ES: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 FS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 GS: sel=0x0018, attr=0x00093, limit=0x000fffff, base=0x0000000000000000 GDTR: limit=0x000007ff, base=0x0000000000001000 LDTR: sel=0x0008, attr=0x04082, limit=0x000007ff, base=0x0000000000001800 device  left promiscuous mode netlink: 11 bytes leftover after parsing attributes in process `syz-executor4'. IDTR: limit=0x0000ffff, base=0x0000000000000000 TR: sel=0x0000, attr=0x0008b, limit=0x0000ffff, base=0x0000000000000000 EFER = 0x0000000000000000 PAT = 0x0007040600070406 DebugCtl = 0x0000000000000000 DebugExceptions = 0x0000000000000000 BndCfgS = 0x0000000000000000 Interruptibility = 00000000 ActivityState = 00000000 *** Host State *** RIP = 0xffffffff811b8fd7 RSP = 0xffff8800545d74c8 CS=0010 SS=0018 DS=0000 ES=0000 FS=0000 GS=0000 TR=0040 FSBase=00007f3b21cfa700 GSBase=ffff88006df00000 TRBase=ffff88006df23100 GDTBase=ffffffffff574000 IDTBase=ffffffffff57b000 CR0=0000000080050033 CR3=000000006a440000 CR4=00000000000026e0 Sysenter RSP=0000000000000000 CS:RIP=0010:ffffffff84da5a70 EFER = 0x0000000000000d01 PAT = 0x0007040600070406 RDS: rds_bind could not find a transport for 172.20.6.187, load rds_tcp or rds_rdma? audit: type=1326 audit(1503780360.313:21): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=6179 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 *** Control State *** PinBased=0000003f CPUBased=b6a1edfa 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=00000000 reason=80000021 qualification=0000000000000000 IDTVectoring: info=00000000 errcode=00000000 TSC Offset = 0xffffffe03e1fae2a TPR Threshold = 0x00 EPT pointer = 0x0000000068d6f01e Virtual processor ID = 0x005a device  entered promiscuous mode device  left promiscuous mode QAT: Invalid ioctl QAT: Invalid ioctl netlink: 11 bytes leftover after parsing attributes in process `syz-executor4'. QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl dccp_invalid_packet: invalid packet type irq bypass consumer (token ffff880039765240) registration fails: -16 device lo entered promiscuous mode PF_BRIDGE: RTM_SETLINK with unknown ifindex device  entered promiscuous mode pit: kvm: requested 2514 ns i8254 timer period limited to 500000 ns device  left promiscuous mode PF_BRIDGE: RTM_SETLINK with unknown ifindex pit: kvm: requested 2514 ns i8254 timer period limited to 500000 ns QAT: Invalid ioctl QAT: Invalid ioctl device  entered promiscuous mode SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6532 comm=syz-executor4 device  left promiscuous mode A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. audit: type=1326 audit(1503780361.288:22): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=6542 comm="syz-executor4" exe="/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. audit: type=1326 audit(1503780361.380:23): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=6542 comm="syz-executor4" exe="/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 loop_reread_partitions: partition scan of loop0 () failed (rc=-13) QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=4 nlmsg_type=25 sclass=netlink_tcpdiag_socket pig=6730 comm=syz-executor5 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=14606 sclass=netlink_route_socket pig=6735 comm=syz-executor2 SELinux: unrecognized netlink message: protocol=4 nlmsg_type=25 sclass=netlink_tcpdiag_socket pig=6738 comm=syz-executor5 rpcbind: RPC call returned error 22 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=14606 sclass=netlink_route_socket pig=6752 comm=syz-executor2 rpcbind: RPC call returned error 22 irq bypass consumer (token ffff88003d5456c0) registration fails: -16 irq bypass consumer (token ffff8800389416c0) registration fails: -16 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=6847 comm=syz-executor0 rfkill: input handler disabled rfkill: input handler enabled insert transport fail, errno -17 sctp: [Deprecated]: syz-executor2 (pid 6963) Use of int in maxseg socket option. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor2 (pid 6968) Use of int in maxseg socket option. Use struct sctp_assoc_value instead QAT: Invalid ioctl QAT: Invalid ioctl SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7044 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7044 comm=syz-executor6 SELinux: unrecognized netlink message: protocol=0 nlmsg_type=0 sclass=netlink_route_socket pig=7044 comm=syz-executor6 Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable do_dccp_setsockopt: sockopt(CHANGE_L/R) is deprecated: fix your app Can not set IPV6_FL_F_REFLECT if flowlabel_consistency sysctl is enable audit: type=1326 audit(1503780362.281:24): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=7077 comm="syz-executor3" exe="/syz-executor3" sig=9 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 audit: type=1326 audit(1503780362.363:25): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=7077 comm="syz-executor3" exe="/syz-executor3" sig=9 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 sctp: [Deprecated]: syz-executor1 (pid 7132) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead sctp: [Deprecated]: syz-executor1 (pid 7151) Use of int in max_burst socket option deprecated. Use struct sctp_assoc_value instead device lo entered promiscuous mode TCP: request_sock_TCP: Possible SYN flooding on port 20024. Sending cookies. Check SNMP counters. sctp: [Deprecated]: syz-executor5 (pid 7491) Use of int in maxseg socket option. Use struct sctp_assoc_value instead TCP: request_sock_TCP: Possible SYN flooding on port 20024. Sending cookies. Check SNMP counters. ata1.00: invalid cdb length 11 TCP: request_sock_TCP: Possible SYN flooding on port 20008. Sending cookies. Check SNMP counters. QAT: Invalid ioctl audit: type=1326 audit(1503780363.292:26): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=7739 comm="syz-executor4" exe="/syz-executor4" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 QAT: Invalid ioctl QAT: Invalid ioctl kvm pmu: pin control bit is ignored kvm_pmu: event creation failed -2 pit: kvm: requested 2514 ns i8254 timer period limited to 500000 ns pit: kvm: requested 2514 ns i8254 timer period limited to 500000 ns ata1.00: invalid multi_count 64 ignored ata1.00: exception Emask 0x0 SAct 0x1 SErr 0x0 action 0x0 ata1.00: failed command: WRITE MULTIPLE FUA EXT ata1.00: cmd ce/07:00:00:00:03/00:00:00:00:00/09 tag 0 ncq nodata 188 out res 50/00:00:28:25:00/00:00:28:25:00/a0 Emask 0x40 (internal error) ata1.00: status: { DRDY } ata1.00: ATA Identify Device Log not supported ata1.00: Security Log not supported ata1.00: ATA Identify Device Log not supported ata1.00: Security Log not supported ata1.00: configured for MWDMA2 ata1: EH complete pit: kvm: requested 2514 ns i8254 timer period limited to 500000 ns pit: kvm: requested 2514 ns i8254 timer period limited to 500000 ns rfkill: input handler disabled rfkill: input handler enabled rfkill: input handler disabled rfkill: input handler enabled kauditd_printk_skb: 4 callbacks suppressed audit: type=1326 audit(1503780364.343:31): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=8318 comm="syz-executor7" exe="/syz-executor7" sig=9 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 net_ratelimit: 1 callbacks suppressed A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. audit: type=1326 audit(1503780364.396:32): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=8384 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 audit: type=1326 audit(1503780364.417:33): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=8318 comm="syz-executor7" exe="/syz-executor7" sig=9 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 nla_parse: 23 callbacks suppressed netlink: 9 bytes leftover after parsing attributes in process `syz-executor2'. A link change request failed with some changes committed already. Interface lo may have been left with an inconsistent configuration, please check. audit: type=1326 audit(1503780364.456:34): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=8384 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0xffff0000 sd 0:0:0:0: tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE sd 0:0:0:0: tag#0 Sense Key : No Sense [current] sd 0:0:0:0: tag#0 Add. Sense: No additional sense information sd 0:0:0:0: tag#0 CDB: Request Sense 03 00 00 00 71 75 sd 0:0:0:0: tag#0 FAILED Result: hostbyte=DID_OK driverbyte=DRIVER_SENSE sd 0:0:0:0: tag#0 Sense Key : No Sense [current] sd 0:0:0:0: tag#0 Add. Sense: No additional sense information sd 0:0:0:0: tag#0 CDB: Request Sense 03 00 00 00 71 75 rfkill: input handler disabled rfkill: input handler enabled netlink: 5 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 5 bytes leftover after parsing attributes in process `syz-executor0'. kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read kvm: pic: non byte read audit: type=1326 audit(1503780364.844:35): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=8622 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 netlink: 13 bytes leftover after parsing attributes in process `syz-executor0'. netlink: 13 bytes leftover after parsing attributes in process `syz-executor0'. audit: type=1326 audit(1503780364.907:36): auid=4294967295 uid=0 gid=0 ses=4294967295 subj=kernel pid=8622 comm="syz-executor2" exe="/syz-executor2" sig=31 arch=c000003e syscall=202 compat=0 ip=0x446749 code=0x0 print_req_error: 100 callbacks suppressed print_req_error: I/O error, dev loop0, sector 0 print_req_error: I/O error, dev loop0, sector 0