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    SubjectRe: linux-next boot error: WARNING: suspicious RCU usage in ipmr_get_table
    On Tue, Apr 28, 2020, 10:47 syzbot
    <syzbot+1519f497f2f9f08183c6@syzkaller.appspotmail.com> wrote:
    >
    > Hello,
    >
    > syzbot found the following crash on:
    >
    > HEAD commit: 0fd02a5d Add linux-next specific files for 20200428
    > git tree: linux-next

    +linux-next for boot breakage

    > console output: https://syzkaller.appspot.com/x/log.txt?x=1696e5d8100000
    > kernel config: https://syzkaller.appspot.com/x/.config?x=9748c3e397b4529
    > dashboard link: https://syzkaller.appspot.com/bug?extid=1519f497f2f9f08183c6
    > compiler: gcc (GCC) 9.0.0 20181231 (experimental)
    >
    > Unfortunately, I don't have any reproducer for this crash yet.
    >
    > IMPORTANT: if you fix the bug, please add the following tag to the commit:
    > Reported-by: syzbot+1519f497f2f9f08183c6@syzkaller.appspotmail.com
    >
    > SCSI subsystem initialized
    > ACPI: bus type USB registered
    > usbcore: registered new interface driver usbfs
    > usbcore: registered new interface driver hub
    > usbcore: registered new device driver usb
    > mc: Linux media interface: v0.10
    > videodev: Linux video capture interface: v2.00
    > pps_core: LinuxPPS API ver. 1 registered
    > pps_core: Software ver. 5.3.6 - Copyright 2005-2007 Rodolfo Giometti <giometti@linux.it>
    > PTP clock support registered
    > EDAC MC: Ver: 3.0.0
    > Advanced Linux Sound Architecture Driver Initialized.
    > PCI: Using ACPI for IRQ routing
    > Bluetooth: Core ver 2.22
    > NET: Registered protocol family 31
    > Bluetooth: HCI device and connection manager initialized
    > Bluetooth: HCI socket layer initialized
    > Bluetooth: L2CAP socket layer initialized
    > Bluetooth: SCO socket layer initialized
    > NET: Registered protocol family 8
    > NET: Registered protocol family 20
    > NetLabel: Initializing
    > NetLabel: domain hash size = 128
    > NetLabel: protocols = UNLABELED CIPSOv4 CALIPSO
    > NetLabel: unlabeled traffic allowed by default
    > nfc: nfc_init: NFC Core ver 0.1
    > NET: Registered protocol family 39
    > clocksource: Switched to clocksource kvm-clock
    > VFS: Disk quotas dquot_6.6.0
    > VFS: Dquot-cache hash table entries: 512 (order 0, 4096 bytes)
    > FS-Cache: Loaded
    > CacheFiles: Loaded
    > TOMOYO: 2.6.0
    > Mandatory Access Control activated.
    > AppArmor: AppArmor Filesystem Enabled
    > pnp: PnP ACPI init
    > pnp: PnP ACPI: found 7 devices
    > clocksource: acpi_pm: mask: 0xffffff max_cycles: 0xffffff, max_idle_ns: 2085701024 ns
    > pci_bus 0000:00: resource 4 [io 0x0000-0x0cf7 window]
    > pci_bus 0000:00: resource 5 [io 0x0d00-0xffff window]
    > pci_bus 0000:00: resource 6 [mem 0x000a0000-0x000bffff window]
    > pci_bus 0000:00: resource 7 [mem 0xc0000000-0xfebfffff window]
    > NET: Registered protocol family 2
    > tcp_listen_portaddr_hash hash table entries: 4096 (order: 6, 327680 bytes, vmalloc)
    > TCP established hash table entries: 65536 (order: 7, 524288 bytes, vmalloc)
    > TCP bind hash table entries: 65536 (order: 10, 4718592 bytes, vmalloc)
    > TCP: Hash tables configured (established 65536 bind 65536)
    > UDP hash table entries: 4096 (order: 7, 655360 bytes, vmalloc)
    > UDP-Lite hash table entries: 4096 (order: 7, 655360 bytes, vmalloc)
    > =============================
    > WARNING: suspicious RCU usage
    > 5.7.0-rc3-next-20200428-syzkaller #0 Not tainted
    > -----------------------------
    > net/ipv4/ipmr.c:136 RCU-list traversed in non-reader section!!
    >
    > other info that might help us debug this:
    >
    >
    > rcu_scheduler_active = 2, debug_locks = 1
    > 1 lock held by swapper/0/1:
    > #0: ffffffff8a5a6330 (pernet_ops_rwsem){+.+.}-{3:3}, at: register_pernet_subsys+0x16/0x40 net/core/net_namespace.c:1257
    >
    > stack backtrace:
    > CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.7.0-rc3-next-20200428-syzkaller #0
    > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
    > Call Trace:
    > __dump_stack lib/dump_stack.c:77 [inline]
    > dump_stack+0x18f/0x20d lib/dump_stack.c:118
    > ipmr_get_table+0x130/0x160 net/ipv4/ipmr.c:136
    > ipmr_new_table net/ipv4/ipmr.c:403 [inline]
    > ipmr_rules_init net/ipv4/ipmr.c:248 [inline]
    > ipmr_net_init+0x133/0x430 net/ipv4/ipmr.c:3089
    > ops_init+0xaf/0x420 net/core/net_namespace.c:151
    > __register_pernet_operations net/core/net_namespace.c:1140 [inline]
    > register_pernet_operations+0x346/0x840 net/core/net_namespace.c:1217
    > register_pernet_subsys+0x25/0x40 net/core/net_namespace.c:1258
    > ip_mr_init+0x36/0x168 net/ipv4/ipmr.c:3140
    > inet_init+0x298/0x424 net/ipv4/af_inet.c:2005
    > do_one_initcall+0x10a/0x7d0 init/main.c:1159
    > do_initcall_level init/main.c:1232 [inline]
    > do_initcalls init/main.c:1248 [inline]
    > do_basic_setup init/main.c:1268 [inline]
    > kernel_init_freeable+0x501/0x5ae init/main.c:1454
    > kernel_init+0xd/0x1bb init/main.c:1359
    > ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
    > NET: Registered protocol family 1
    > RPC: Registered named UNIX socket transport module.
    > RPC: Registered udp transport module.
    > RPC: Registered tcp transport module.
    > RPC: Registered tcp NFSv4.1 backchannel transport module.
    > NET: Registered protocol family 44
    > pci 0000:00:00.0: Limiting direct PCI/PCI transfers
    > PCI: CLS 0 bytes, default 64
    > PCI-DMA: Using software bounce buffering for IO (SWIOTLB)
    > software IO TLB: mapped [mem 0xaa600000-0xae600000] (64MB)
    > RAPL PMU: API unit is 2^-32 Joules, 0 fixed counters, 10737418240 ms ovfl timer
    > kvm: already loaded the other module
    > clocksource: tsc: mask: 0xffffffffffffffff max_cycles: 0x212735223b2, max_idle_ns: 440795277976 ns
    > clocksource: Switched to clocksource tsc
    > mce: Machine check injector initialized
    > check: Scanning for low memory corruption every 60 seconds
    > Initialise system trusted keyrings
    > workingset: timestamp_bits=40 max_order=21 bucket_order=0
    > zbud: loaded
    > DLM installed
    > squashfs: version 4.0 (2009/01/31) Phillip Lougher
    > FS-Cache: Netfs 'nfs' registered for caching
    > NFS: Registering the id_resolver key type
    > Key type id_resolver registered
    > Key type id_legacy registered
    > nfs4filelayout_init: NFSv4 File Layout Driver Registering...
    > Installing knfsd (copyright (C) 1996 okir@monad.swb.de).
    > FS-Cache: Netfs 'cifs' registered for caching
    > Key type cifs.spnego registered
    > Key type cifs.idmap registered
    > ntfs: driver 2.1.32 [Flags: R/W].
    > fuse: init (API version 7.31)
    > JFS: nTxBlock = 8192, nTxLock = 65536
    > SGI XFS with ACLs, security attributes, realtime, quota, no debug enabled
    > 9p: Installing v9fs 9p2000 file system support
    > FS-Cache: Netfs '9p' registered for caching
    > ocfs2: Registered cluster interface o2cb
    > ocfs2: Registered cluster interface user
    > OCFS2 User DLM kernel interface loaded
    > gfs2: GFS2 installed
    > FS-Cache: Netfs 'ceph' registered for caching
    > ceph: loaded (mds proto 32)
    > NET: Registered protocol family 38
    > async_tx: api initialized (async)
    > Key type asymmetric registered
    > Asymmetric key parser 'x509' registered
    > Asymmetric key parser 'pkcs8' registered
    > Key type pkcs7_test registered
    > Asymmetric key parser 'tpm_parser' registered
    > Block layer SCSI generic (bsg) driver version 0.4 loaded (major 243)
    > io scheduler mq-deadline registered
    > io scheduler kyber registered
    > io scheduler bfq registered
    > hgafb: HGA card not detected.
    > hgafb: probe of hgafb.0 failed with error -22
    > usbcore: registered new interface driver udlfb
    > uvesafb: failed to execute /sbin/v86d
    > uvesafb: make sure that the v86d helper is installed and executable
    > uvesafb: Getting VBE info block failed (eax=0x4f00, err=-2)
    > uvesafb: vbe_init() failed with -22
    > uvesafb: probe of uvesafb.0 failed with error -22
    > vga16fb: mapped to 0x000000002f252cfb
    > Console: switching to colour frame buffer device 80x30
    > fb0: VGA16 VGA frame buffer device
    > input: Power Button as /devices/LNXSYSTM:00/LNXPWRBN:00/input/input0
    > ACPI: Power Button [PWRF]
    > input: Sleep Button as /devices/LNXSYSTM:00/LNXSLPBN:00/input/input1
    > ACPI: Sleep Button [SLPF]
    > ioatdma: Intel(R) QuickData Technology Driver 5.00
    > PCI Interrupt Link [LNKC] enabled at IRQ 11
    > virtio-pci 0000:00:03.0: virtio_pci: leaving for legacy driver
    > PCI Interrupt Link [LNKD] enabled at IRQ 10
    > virtio-pci 0000:00:04.0: virtio_pci: leaving for legacy driver
    > PCI Interrupt Link [LNKA] enabled at IRQ 10
    > virtio-pci 0000:00:05.0: virtio_pci: leaving for legacy driver
    > N_HDLC line discipline registered with maxframe=4096
    > Serial: 8250/16550 driver, 4 ports, IRQ sharing enabled
    > 00:03: ttyS0 at I/O 0x3f8 (irq = 4, base_baud = 115200) is a 16550A
    > 00:04: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200) is a 16550A
    > 00:05: ttyS2 at I/O 0x3e8 (irq = 6, base_baud = 115200) is a 16550A
    > 00:06: ttyS3 at I/O 0x2e8 (irq = 7, base_baud = 115200) is a 16550A
    > Cyclades driver 2.6
    > Initializing Nozomi driver 2.1d
    > RocketPort device driver module, version 2.09, 12-June-2003
    > No rocketport ports found; unloading driver
    > Non-volatile memory driver v1.3
    > Linux agpgart interface v0.103
    > [drm] Initialized vgem 1.0.0 20120112 for vgem on minor 0
    > [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
    > [drm] Initialized vkms 1.0.0 20180514 for vkms on minor 1
    > usbcore: registered new interface driver udl
    > brd: module loaded
    > loop: module loaded
    > zram: Added device: zram0
    > null_blk: module loaded
    > nfcsim 0.2 initialized
    > Loading iSCSI transport class v2.0-870.
    > scsi host0: Virtio SCSI HBA
    > st: Version 20160209, fixed bufsize 32768, s/g segs 256
    > slram: not enough parameters.
    > ftl_cs: FTL header not found.
    > wireguard: WireGuard 1.0.0 loaded. See www.wireguard.com for information.
    > wireguard: Copyright (C) 2015-2019 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
    > eql: Equalizer2002: Simon Janes (simon@ncm.com) and David S. Miller (davem@redhat.com)
    > MACsec IEEE 802.1AE
    > tun: Universal TUN/TAP device driver, 1.6
    > vcan: Virtual CAN interface driver
    > vxcan: Virtual CAN Tunnel driver
    > slcan: serial line CAN interface driver
    > slcan: 10 dynamic interface channels.
    > CAN device driver interface
    > e100: Intel(R) PRO/100 Network Driver, 3.5.24-k2-NAPI
    > e100: Copyright(c) 1999-2006 Intel Corporation
    > e1000: Intel(R) PRO/1000 Network Driver - version 7.3.21-k8-NAPI
    > e1000: Copyright (c) 1999-2006 Intel Corporation.
    > e1000e: Intel(R) PRO/1000 Network Driver - 3.2.6-k
    > e1000e: Copyright(c) 1999 - 2015 Intel Corporation.
    > mkiss: AX.25 Multikiss, Hans Albas PE1AYX
    > AX.25: 6pack driver, Revision: 0.3.0
    > AX.25: bpqether driver version 004
    > PPP generic driver version 2.4.2
    > PPP BSD Compression module registered
    > PPP Deflate Compression module registered
    > PPP MPPE Compression module registered
    > NET: Registered protocol family 24
    > PPTP driver version 0.8.5
    > SLIP: version 0.8.4-NET3.019-NEWTTY (dynamic channels, max=256) (6 bit encapsulation enabled).
    > CSLIP: code copyright 1989 Regents of the University of California.
    > SLIP linefill/keepalive option.
    > hdlc: HDLC support module revision 1.22
    > x25_asy: X.25 async: version 0.00 ALPHA (dynamic channels, max=256)
    > DLCI driver v0.35, 4 Jan 1997, mike.mclagan@linux.org.
    > LAPB Ethernet driver version 0.02
    > usbcore: registered new interface driver rndis_wlan
    > mac80211_hwsim: initializing netlink
    > fakelb driver is marked as deprecated, please use mac802154_hwsim!
    > ieee802154fakelb ieee802154fakelb: added 2 fake ieee802154 hardware devices
    > mac802154_hwsim mac802154_hwsim: Added 2 mac802154 hwsim hardware radios
    > VMware vmxnet3 virtual NIC driver - version 1.4.17.0-k-NAPI
    > pegasus: v0.9.3 (2013/04/25), Pegasus/Pegasus II USB Ethernet driver
    > usbcore: registered new interface driver pegasus
    > usbcore: registered new interface driver rtl8150
    > usbcore: registered new interface driver r8152
    > usbcore: registered new interface driver asix
    > usbcore: registered new interface driver ax88179_178a
    > usbcore: registered new interface driver cdc_ether
    > usbcore: registered new interface driver dm9601
    > usbcore: registered new interface driver smsc75xx
    > usbcore: registered new interface driver smsc95xx
    > usbcore: registered new interface driver net1080
    > usbcore: registered new interface driver rndis_host
    > usbcore: registered new interface driver cdc_subset
    > usbcore: registered new interface driver zaurus
    > usbcore: registered new interface driver MOSCHIP usb-ethernet driver
    > usbcore: registered new interface driver cdc_ncm
    > usbcore: registered new interface driver cdc_mbim
    > VFIO - User Level meta-driver version: 0.3
    > aoe: AoE v85 initialised.
    > ehci_hcd: USB 2.0 'Enhanced' Host Controller (EHCI) Driver
    > ehci-pci: EHCI PCI platform driver
    > ohci_hcd: USB 1.1 'Open' Host Controller (OHCI) Driver
    > ohci-pci: OHCI PCI platform driver
    > uhci_hcd: USB Universal Host Controller Interface driver
    > usbcore: registered new interface driver cdc_acm
    > cdc_acm: USB Abstract Control Model driver for USB modems and ISDN adapters
    > usbcore: registered new interface driver usblp
    > usbcore: registered new interface driver cdc_wdm
    > usbcore: registered new interface driver uas
    > usbcore: registered new interface driver usb-storage
    > usbcore: registered new interface driver ums-realtek
    > usbcore: registered new interface driver usbserial_generic
    > usbserial: USB Serial support registered for generic
    > usbcore: registered new interface driver ch341
    > usbserial: USB Serial support registered for ch341-uart
    > usbcore: registered new interface driver cp210x
    > usbserial: USB Serial support registered for cp210x
    > usbcore: registered new interface driver ftdi_sio
    > usbserial: USB Serial support registered for FTDI USB Serial Device
    > usbcore: registered new interface driver keyspan
    > usbserial: USB Serial support registered for Keyspan - (without firmware)
    > usbserial: USB Serial support registered for Keyspan 1 port adapter
    > usbserial: USB Serial support registered for Keyspan 2 port adapter
    > usbserial: USB Serial support registered for Keyspan 4 port adapter
    > usbcore: registered new interface driver option
    > usbserial: USB Serial support registered for GSM modem (1-port)
    > usbcore: registered new interface driver oti6858
    > usbserial: USB Serial support registered for oti6858
    > usbcore: registered new interface driver pl2303
    > usbserial: USB Serial support registered for pl2303
    > usbcore: registered new interface driver qcserial
    > usbserial: USB Serial support registered for Qualcomm USB modem
    > usbcore: registered new interface driver sierra
    > usbserial: USB Serial support registered for Sierra USB modem
    > usbcore: registered new interface driver usb_serial_simple
    > usbserial: USB Serial support registered for carelink
    > usbserial: USB Serial support registered for zio
    > usbserial: USB Serial support registered for funsoft
    > usbserial: USB Serial support registered for flashloader
    > usbserial: USB Serial support registered for google
    > usbserial: USB Serial support registered for libtransistor
    > usbserial: USB Serial support registered for vivopay
    > usbserial: USB Serial support registered for moto_modem
    > usbserial: USB Serial support registered for motorola_tetra
    > usbserial: USB Serial support registered for novatel_gps
    > usbserial: USB Serial support registered for hp4x
    > usbserial: USB Serial support registered for suunto
    > usbserial: USB Serial support registered for siemens_mpi
    > dummy_hcd dummy_hcd.0: USB Host+Gadget Emulator, driver 02 May 2005
    > dummy_hcd dummy_hcd.0: Dummy host controller
    > dummy_hcd dummy_hcd.0: new USB bus registered, assigned bus number 1
    > usb usb1: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb1: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb1: Product: Dummy host controller
    > usb usb1: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller dummy_hcd
    > usb usb1: SerialNumber: dummy_hcd.0
    > hub 1-0:1.0: USB hub found
    > hub 1-0:1.0: 1 port detected
    > dummy_hcd dummy_hcd.1: USB Host+Gadget Emulator, driver 02 May 2005
    > dummy_hcd dummy_hcd.1: Dummy host controller
    > dummy_hcd dummy_hcd.1: new USB bus registered, assigned bus number 2
    > usb usb2: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb2: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb2: Product: Dummy host controller
    > usb usb2: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller dummy_hcd
    > usb usb2: SerialNumber: dummy_hcd.1
    > hub 2-0:1.0: USB hub found
    > hub 2-0:1.0: 1 port detected
    > dummy_hcd dummy_hcd.2: USB Host+Gadget Emulator, driver 02 May 2005
    > dummy_hcd dummy_hcd.2: Dummy host controller
    > dummy_hcd dummy_hcd.2: new USB bus registered, assigned bus number 3
    > usb usb3: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb3: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb3: Product: Dummy host controller
    > usb usb3: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller dummy_hcd
    > usb usb3: SerialNumber: dummy_hcd.2
    > hub 3-0:1.0: USB hub found
    > hub 3-0:1.0: 1 port detected
    > dummy_hcd dummy_hcd.3: USB Host+Gadget Emulator, driver 02 May 2005
    > dummy_hcd dummy_hcd.3: Dummy host controller
    > dummy_hcd dummy_hcd.3: new USB bus registered, assigned bus number 4
    > usb usb4: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb4: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb4: Product: Dummy host controller
    > usb usb4: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller dummy_hcd
    > usb usb4: SerialNumber: dummy_hcd.3
    > hub 4-0:1.0: USB hub found
    > hub 4-0:1.0: 1 port detected
    > dummy_hcd dummy_hcd.4: USB Host+Gadget Emulator, driver 02 May 2005
    > dummy_hcd dummy_hcd.4: Dummy host controller
    > dummy_hcd dummy_hcd.4: new USB bus registered, assigned bus number 5
    > usb usb5: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb5: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb5: Product: Dummy host controller
    > usb usb5: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller dummy_hcd
    > usb usb5: SerialNumber: dummy_hcd.4
    > hub 5-0:1.0: USB hub found
    > hub 5-0:1.0: 1 port detected
    > dummy_hcd dummy_hcd.5: USB Host+Gadget Emulator, driver 02 May 2005
    > dummy_hcd dummy_hcd.5: Dummy host controller
    > dummy_hcd dummy_hcd.5: new USB bus registered, assigned bus number 6
    > usb usb6: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb6: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb6: Product: Dummy host controller
    > usb usb6: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller dummy_hcd
    > usb usb6: SerialNumber: dummy_hcd.5
    > hub 6-0:1.0: USB hub found
    > hub 6-0:1.0: 1 port detected
    > dummy_hcd dummy_hcd.6: USB Host+Gadget Emulator, driver 02 May 2005
    > dummy_hcd dummy_hcd.6: Dummy host controller
    > dummy_hcd dummy_hcd.6: new USB bus registered, assigned bus number 7
    > usb usb7: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb7: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb7: Product: Dummy host controller
    > usb usb7: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller dummy_hcd
    > usb usb7: SerialNumber: dummy_hcd.6
    > hub 7-0:1.0: USB hub found
    > hub 7-0:1.0: 1 port detected
    > dummy_hcd dummy_hcd.7: USB Host+Gadget Emulator, driver 02 May 2005
    > dummy_hcd dummy_hcd.7: Dummy host controller
    > dummy_hcd dummy_hcd.7: new USB bus registered, assigned bus number 8
    > usb usb8: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb8: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb8: Product: Dummy host controller
    > usb usb8: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller dummy_hcd
    > usb usb8: SerialNumber: dummy_hcd.7
    > hub 8-0:1.0: USB hub found
    > hub 8-0:1.0: 1 port detected
    > using random self ethernet address
    > using random host ethernet address
    > Mass Storage Function, version: 2009/09/11
    > LUN: removable file: (no medium)
    > no file given for LUN0
    > printk: console [ttyGS0] disabled
    > g_multi dummy_udc.0: failed to start g_multi: -22
    > vhci_hcd vhci_hcd.0: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.0: new USB bus registered, assigned bus number 9
    > vhci_hcd: created sysfs vhci_hcd.0
    > usb usb9: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb9: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb9: Product: USB/IP Virtual Host Controller
    > usb usb9: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb9: SerialNumber: vhci_hcd.0
    > hub 9-0:1.0: USB hub found
    > hub 9-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.0: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.0: new USB bus registered, assigned bus number 10
    > usb usb10: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb10: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb10: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb10: Product: USB/IP Virtual Host Controller
    > usb usb10: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb10: SerialNumber: vhci_hcd.0
    > hub 10-0:1.0: USB hub found
    > hub 10-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.1: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.1: new USB bus registered, assigned bus number 11
    > usb usb11: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb11: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb11: Product: USB/IP Virtual Host Controller
    > usb usb11: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb11: SerialNumber: vhci_hcd.1
    > hub 11-0:1.0: USB hub found
    > hub 11-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.1: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.1: new USB bus registered, assigned bus number 12
    > usb usb12: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb12: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb12: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb12: Product: USB/IP Virtual Host Controller
    > usb usb12: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb12: SerialNumber: vhci_hcd.1
    > hub 12-0:1.0: USB hub found
    > hub 12-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.2: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.2: new USB bus registered, assigned bus number 13
    > usb usb13: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb13: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb13: Product: USB/IP Virtual Host Controller
    > usb usb13: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb13: SerialNumber: vhci_hcd.2
    > hub 13-0:1.0: USB hub found
    > hub 13-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.2: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.2: new USB bus registered, assigned bus number 14
    > usb usb14: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb14: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb14: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb14: Product: USB/IP Virtual Host Controller
    > usb usb14: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb14: SerialNumber: vhci_hcd.2
    > hub 14-0:1.0: USB hub found
    > hub 14-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.3: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.3: new USB bus registered, assigned bus number 15
    > usb usb15: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb15: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb15: Product: USB/IP Virtual Host Controller
    > usb usb15: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb15: SerialNumber: vhci_hcd.3
    > hub 15-0:1.0: USB hub found
    > hub 15-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.3: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.3: new USB bus registered, assigned bus number 16
    > usb usb16: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb16: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb16: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb16: Product: USB/IP Virtual Host Controller
    > usb usb16: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb16: SerialNumber: vhci_hcd.3
    > hub 16-0:1.0: USB hub found
    > hub 16-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.4: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.4: new USB bus registered, assigned bus number 17
    > usb usb17: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb17: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb17: Product: USB/IP Virtual Host Controller
    > usb usb17: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb17: SerialNumber: vhci_hcd.4
    > hub 17-0:1.0: USB hub found
    > hub 17-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.4: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.4: new USB bus registered, assigned bus number 18
    > usb usb18: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb18: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb18: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb18: Product: USB/IP Virtual Host Controller
    > usb usb18: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb18: SerialNumber: vhci_hcd.4
    > hub 18-0:1.0: USB hub found
    > hub 18-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.5: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.5: new USB bus registered, assigned bus number 19
    > usb usb19: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb19: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb19: Product: USB/IP Virtual Host Controller
    > usb usb19: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb19: SerialNumber: vhci_hcd.5
    > hub 19-0:1.0: USB hub found
    > hub 19-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.5: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.5: new USB bus registered, assigned bus number 20
    > usb usb20: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb20: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb20: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb20: Product: USB/IP Virtual Host Controller
    > usb usb20: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb20: SerialNumber: vhci_hcd.5
    > hub 20-0:1.0: USB hub found
    > hub 20-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.6: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.6: new USB bus registered, assigned bus number 21
    > usb usb21: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb21: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb21: Product: USB/IP Virtual Host Controller
    > usb usb21: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb21: SerialNumber: vhci_hcd.6
    > hub 21-0:1.0: USB hub found
    > hub 21-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.6: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.6: new USB bus registered, assigned bus number 22
    > usb usb22: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb22: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb22: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb22: Product: USB/IP Virtual Host Controller
    > usb usb22: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb22: SerialNumber: vhci_hcd.6
    > hub 22-0:1.0: USB hub found
    > hub 22-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.7: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.7: new USB bus registered, assigned bus number 23
    > usb usb23: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb23: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb23: Product: USB/IP Virtual Host Controller
    > usb usb23: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb23: SerialNumber: vhci_hcd.7
    > hub 23-0:1.0: USB hub found
    > hub 23-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.7: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.7: new USB bus registered, assigned bus number 24
    > usb usb24: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb24: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb24: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb24: Product: USB/IP Virtual Host Controller
    > usb usb24: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb24: SerialNumber: vhci_hcd.7
    > hub 24-0:1.0: USB hub found
    > hub 24-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.8: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.8: new USB bus registered, assigned bus number 25
    > usb usb25: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb25: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb25: Product: USB/IP Virtual Host Controller
    > usb usb25: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb25: SerialNumber: vhci_hcd.8
    > hub 25-0:1.0: USB hub found
    > hub 25-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.8: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.8: new USB bus registered, assigned bus number 26
    > usb usb26: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb26: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb26: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb26: Product: USB/IP Virtual Host Controller
    > usb usb26: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb26: SerialNumber: vhci_hcd.8
    > hub 26-0:1.0: USB hub found
    > hub 26-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.9: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.9: new USB bus registered, assigned bus number 27
    > usb usb27: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb27: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb27: Product: USB/IP Virtual Host Controller
    > usb usb27: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb27: SerialNumber: vhci_hcd.9
    > hub 27-0:1.0: USB hub found
    > hub 27-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.9: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.9: new USB bus registered, assigned bus number 28
    > usb usb28: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb28: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb28: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb28: Product: USB/IP Virtual Host Controller
    > usb usb28: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb28: SerialNumber: vhci_hcd.9
    > hub 28-0:1.0: USB hub found
    > hub 28-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.10: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.10: new USB bus registered, assigned bus number 29
    > usb usb29: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb29: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb29: Product: USB/IP Virtual Host Controller
    > usb usb29: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb29: SerialNumber: vhci_hcd.10
    > hub 29-0:1.0: USB hub found
    > hub 29-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.10: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.10: new USB bus registered, assigned bus number 30
    > usb usb30: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb30: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb30: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb30: Product: USB/IP Virtual Host Controller
    > usb usb30: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb30: SerialNumber: vhci_hcd.10
    > hub 30-0:1.0: USB hub found
    > hub 30-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.11: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.11: new USB bus registered, assigned bus number 31
    > usb usb31: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb31: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb31: Product: USB/IP Virtual Host Controller
    > usb usb31: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb31: SerialNumber: vhci_hcd.11
    > hub 31-0:1.0: USB hub found
    > hub 31-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.11: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.11: new USB bus registered, assigned bus number 32
    > usb usb32: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb32: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb32: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb32: Product: USB/IP Virtual Host Controller
    > usb usb32: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb32: SerialNumber: vhci_hcd.11
    > hub 32-0:1.0: USB hub found
    > hub 32-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.12: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.12: new USB bus registered, assigned bus number 33
    > usb usb33: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb33: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb33: Product: USB/IP Virtual Host Controller
    > usb usb33: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb33: SerialNumber: vhci_hcd.12
    > hub 33-0:1.0: USB hub found
    > hub 33-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.12: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.12: new USB bus registered, assigned bus number 34
    > usb usb34: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb34: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb34: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb34: Product: USB/IP Virtual Host Controller
    > usb usb34: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb34: SerialNumber: vhci_hcd.12
    > hub 34-0:1.0: USB hub found
    > hub 34-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.13: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.13: new USB bus registered, assigned bus number 35
    > usb usb35: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb35: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb35: Product: USB/IP Virtual Host Controller
    > usb usb35: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb35: SerialNumber: vhci_hcd.13
    > hub 35-0:1.0: USB hub found
    > hub 35-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.13: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.13: new USB bus registered, assigned bus number 36
    > usb usb36: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb36: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb36: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb36: Product: USB/IP Virtual Host Controller
    > usb usb36: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb36: SerialNumber: vhci_hcd.13
    > hub 36-0:1.0: USB hub found
    > hub 36-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.14: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.14: new USB bus registered, assigned bus number 37
    > usb usb37: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb37: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb37: Product: USB/IP Virtual Host Controller
    > usb usb37: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb37: SerialNumber: vhci_hcd.14
    > hub 37-0:1.0: USB hub found
    > hub 37-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.14: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.14: new USB bus registered, assigned bus number 38
    > usb usb38: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb38: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb38: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb38: Product: USB/IP Virtual Host Controller
    > usb usb38: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb38: SerialNumber: vhci_hcd.14
    > hub 38-0:1.0: USB hub found
    > hub 38-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.15: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.15: new USB bus registered, assigned bus number 39
    > usb usb39: New USB device found, idVendor=1d6b, idProduct=0002, bcdDevice= 5.07
    > usb usb39: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb39: Product: USB/IP Virtual Host Controller
    > usb usb39: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb39: SerialNumber: vhci_hcd.15
    > hub 39-0:1.0: USB hub found
    > hub 39-0:1.0: 8 ports detected
    > vhci_hcd vhci_hcd.15: USB/IP Virtual Host Controller
    > vhci_hcd vhci_hcd.15: new USB bus registered, assigned bus number 40
    > usb usb40: We don't know the algorithms for LPM for this host, disabling LPM.
    > usb usb40: New USB device found, idVendor=1d6b, idProduct=0003, bcdDevice= 5.07
    > usb usb40: New USB device strings: Mfr=3, Product=2, SerialNumber=1
    > usb usb40: Product: USB/IP Virtual Host Controller
    > usb usb40: Manufacturer: Linux 5.7.0-rc3-next-20200428-syzkaller vhci_hcd
    > usb usb40: SerialNumber: vhci_hcd.15
    > hub 40-0:1.0: USB hub found
    > hub 40-0:1.0: 8 ports detected
    > usbcore: registered new device driver usbip-host
    > i8042: PNP: PS/2 Controller [PNP0303:KBD,PNP0f13:MOU] at 0x60,0x64 irq 1,12
    > i8042: Warning: Keylock active
    > serio: i8042 KBD port at 0x60,0x64 irq 1
    > serio: i8042 AUX port at 0x60,0x64 irq 12
    > mousedev: PS/2 mouse device common for all mice
    > rtc_cmos 00:00: RTC can wake from S4
    > rtc_cmos 00:00: registered as rtc0
    > rtc_cmos 00:00: alarms up to one day, 114 bytes nvram
    > i2c /dev entries driver
    > piix4_smbus 0000:00:01.3: SMBus base address uninitialized - upgrade BIOS or use force_addr=0xaddr
    > usbcore: registered new interface driver RobotFuzz Open Source InterFace, OSIF
    > usbcore: registered new interface driver i2c-tiny-usb
    > IR NEC protocol handler initialized
    > IR RC5(x/sz) protocol handler initialized
    > IR RC6 protocol handler initialized
    > IR JVC protocol handler initialized
    > IR Sony protocol handler initialized
    > IR SANYO protocol handler initialized
    > IR Sharp protocol handler initialized
    > IR MCE Keyboard/mouse protocol handler initialized
    > IR XMP protocol handler initialized
    > usbcore: registered new interface driver uvcvideo
    > USB Video Class driver (1.1.1)
    > gspca_main: v2.14.0 registered
    > vivid-000: using single planar format API
    > vivid-000: CEC adapter cec0 registered for HDMI input 0
    > vivid-000: V4L2 capture device registered as video3
    > vivid-000: CEC adapter cec1 registered for HDMI output 0
    > vivid-000: V4L2 output device registered as video4
    > vivid-000: V4L2 capture device registered as vbi0, supports raw and sliced VBI
    > vivid-000: V4L2 output device registered as vbi1, supports raw and sliced VBI
    > vivid-000: V4L2 capture device registered as swradio0
    > vivid-000: V4L2 receiver device registered as radio0
    > vivid-000: V4L2 transmitter device registered as radio1
    > vivid-000: V4L2 metadata capture device registered as video5
    > vivid-000: V4L2 metadata output device registered as video6
    > vivid-000: V4L2 touch capture device registered as v4l-touch0
    > vivid-001: using multiplanar format API
    > vivid-001: CEC adapter cec2 registered for HDMI input 0
    > vivid-001: V4L2 capture device registered as video7
    > vivid-001: CEC adapter cec3 registered for HDMI output 0
    > vivid-001: V4L2 output device registered as video8
    > vivid-001: V4L2 capture device registered as vbi2, supports raw and sliced VBI
    > vivid-001: V4L2 output device registered as vbi3, supports raw and sliced VBI
    > vivid-001: V4L2 capture device registered as swradio1
    > vivid-001: V4L2 receiver device registered as radio2
    > vivid-001: V4L2 transmitter device registered as radio3
    > vivid-001: V4L2 metadata capture device registered as video9
    > vivid-001: V4L2 metadata output device registered as video10
    > vivid-001: V4L2 touch capture device registered as v4l-touch1
    > vivid-002: using single planar format API
    > vivid-002: CEC adapter cec4 registered for HDMI input 0
    > vivid-002: V4L2 capture device registered as video11
    > vivid-002: CEC adapter cec5 registered for HDMI output 0
    > vivid-002: V4L2 output device registered as video12
    > vivid-002: V4L2 capture device registered as vbi4, supports raw and sliced VBI
    > vivid-002: V4L2 output device registered as vbi5, supports raw and sliced VBI
    > vivid-002: V4L2 capture device registered as swradio2
    > vivid-002: V4L2 receiver device registered as radio4
    > vivid-002: V4L2 transmitter device registered as radio5
    > vivid-002: V4L2 metadata capture device registered as video13
    > vivid-002: V4L2 metadata output device registered as video14
    > vivid-002: V4L2 touch capture device registered as v4l-touch2
    > vivid-003: using multiplanar format API
    > vivid-003: CEC adapter cec6 registered for HDMI input 0
    > vivid-003: V4L2 capture device registered as video15
    > vivid-003: CEC adapter cec7 registered for HDMI output 0
    > vivid-003: V4L2 output device registered as video16
    > vivid-003: V4L2 capture device registered as vbi6, supports raw and sliced VBI
    > vivid-003: V4L2 output device registered as vbi7, supports raw and sliced VBI
    > vivid-003: V4L2 capture device registered as swradio3
    > vivid-003: V4L2 receiver device registered as radio6
    > vivid-003: V4L2 transmitter device registered as radio7
    > vivid-003: V4L2 metadata capture device registered as video17
    > vivid-003: V4L2 metadata output device registered as video18
    > vivid-003: V4L2 touch capture device registered as v4l-touch3
    > vivid-004: using single planar format API
    > vivid-004: CEC adapter cec8 registered for HDMI input 0
    > vivid-004: V4L2 capture device registered as video19
    > vivid-004: CEC adapter cec9 registered for HDMI output 0
    > vivid-004: V4L2 output device registered as video20
    > vivid-004: V4L2 capture device registered as vbi8, supports raw and sliced VBI
    > vivid-004: V4L2 output device registered as vbi9, supports raw and sliced VBI
    > vivid-004: V4L2 capture device registered as swradio4
    > vivid-004: V4L2 receiver device registered as radio8
    > vivid-004: V4L2 transmitter device registered as radio9
    > vivid-004: V4L2 metadata capture device registered as video21
    > vivid-004: V4L2 metadata output device registered as video22
    > vivid-004: V4L2 touch capture device registered as v4l-touch4
    > vivid-005: using multiplanar format API
    > vivid-005: CEC adapter cec10 registered for HDMI input 0
    > vivid-005: V4L2 capture device registered as video23
    > vivid-005: CEC adapter cec11 registered for HDMI output 0
    > vivid-005: V4L2 output device registered as video24
    > vivid-005: V4L2 capture device registered as vbi10, supports raw and sliced VBI
    > vivid-005: V4L2 output device registered as vbi11, supports raw and sliced VBI
    > vivid-005: V4L2 capture device registered as swradio5
    > vivid-005: V4L2 receiver device registered as radio10
    > vivid-005: V4L2 transmitter device registered as radio11
    > vivid-005: V4L2 metadata capture device registered as video25
    > vivid-005: V4L2 metadata output device registered as video26
    > vivid-005: V4L2 touch capture device registered as v4l-touch5
    > vivid-006: using single planar format API
    > vivid-006: CEC adapter cec12 registered for HDMI input 0
    > vivid-006: V4L2 capture device registered as video27
    > vivid-006: CEC adapter cec13 registered for HDMI output 0
    > vivid-006: V4L2 output device registered as video28
    > vivid-006: V4L2 capture device registered as vbi12, supports raw and sliced VBI
    > vivid-006: V4L2 output device registered as vbi13, supports raw and sliced VBI
    > vivid-006: V4L2 capture device registered as swradio6
    > vivid-006: V4L2 receiver device registered as radio12
    > vivid-006: V4L2 transmitter device registered as radio13
    > vivid-006: V4L2 metadata capture device registered as video29
    > vivid-006: V4L2 metadata output device registered as video30
    > vivid-006: V4L2 touch capture device registered as v4l-touch6
    > vivid-007: using multiplanar format API
    > vivid-007: CEC adapter cec14 registered for HDMI input 0
    > vivid-007: V4L2 capture device registered as video31
    > vivid-007: CEC adapter cec15 registered for HDMI output 0
    > vivid-007: V4L2 output device registered as video32
    > vivid-007: V4L2 capture device registered as vbi14, supports raw and sliced VBI
    > vivid-007: V4L2 output device registered as vbi15, supports raw and sliced VBI
    > vivid-007: V4L2 capture device registered as swradio7
    > vivid-007: V4L2 receiver device registered as radio14
    > vivid-007: V4L2 transmitter device registered as radio15
    > vivid-007: V4L2 metadata capture device registered as video33
    > vivid-007: V4L2 metadata output device registered as video34
    > vivid-007: V4L2 touch capture device registered as v4l-touch7
    > vivid-008: using single planar format API
    > vivid-008: CEC adapter cec16 registered for HDMI input 0
    > vivid-008: V4L2 capture device registered as video35
    > vivid-008: CEC adapter cec17 registered for HDMI output 0
    > vivid-008: V4L2 output device registered as video36
    > vivid-008: V4L2 capture device registered as vbi16, supports raw and sliced VBI
    > vivid-008: V4L2 output device registered as vbi17, supports raw and sliced VBI
    > vivid-008: V4L2 capture device registered as swradio8
    > vivid-008: V4L2 receiver device registered as radio16
    > vivid-008: V4L2 transmitter device registered as radio17
    > vivid-008: V4L2 metadata capture device registered as video37
    > vivid-008: V4L2 metadata output device registered as video38
    > vivid-008: V4L2 touch capture device registered as v4l-touch8
    > vivid-009: using multiplanar format API
    > vivid-009: CEC adapter cec18 registered for HDMI input 0
    > vivid-009: V4L2 capture device registered as video39
    > vivid-009: CEC adapter cec19 registered for HDMI output 0
    > vivid-009: V4L2 output device registered as video40
    > vivid-009: V4L2 capture device registered as vbi18, supports raw and sliced VBI
    > vivid-009: V4L2 output device registered as vbi19, supports raw and sliced VBI
    > vivid-009: V4L2 capture device registered as swradio9
    > vivid-009: V4L2 receiver device registered as radio18
    > vivid-009: V4L2 transmitter device registered as radio19
    > vivid-009: V4L2 metadata capture device registered as video41
    > vivid-009: V4L2 metadata output device registered as video42
    > vivid-009: V4L2 touch capture device registered as v4l-touch9
    > vivid-010: using single planar format API
    > vivid-010: CEC adapter cec20 registered for HDMI input 0
    > vivid-010: V4L2 capture device registered as video43
    > vivid-010: CEC adapter cec21 registered for HDMI output 0
    > vivid-010: V4L2 output device registered as video44
    > vivid-010: V4L2 capture device registered as vbi20, supports raw and sliced VBI
    > vivid-010: V4L2 output device registered as vbi21, supports raw and sliced VBI
    > vivid-010: V4L2 capture device registered as swradio10
    > vivid-010: V4L2 receiver device registered as radio20
    > vivid-010: V4L2 transmitter device registered as radio21
    > vivid-010: V4L2 metadata capture device registered as video45
    > vivid-010: V4L2 metadata output device registered as video46
    > vivid-010: V4L2 touch capture device registered as v4l-touch10
    > vivid-011: using multiplanar format API
    > vivid-011: CEC adapter cec22 registered for HDMI input 0
    > vivid-011: V4L2 capture device registered as video47
    > vivid-011: CEC adapter cec23 registered for HDMI output 0
    > vivid-011: V4L2 output device registered as video48
    > vivid-011: V4L2 capture device registered as vbi22, supports raw and sliced VBI
    > vivid-011: V4L2 output device registered as vbi23, supports raw and sliced VBI
    > vivid-011: V4L2 capture device registered as swradio11
    > vivid-011: V4L2 receiver device registered as radio22
    > vivid-011: V4L2 transmitter device registered as radio23
    > vivid-011: V4L2 metadata capture device registered as video49
    > vivid-011: V4L2 metadata output device registered as video50
    > vivid-011: V4L2 touch capture device registered as v4l-touch11
    > vivid-012: using single planar format API
    > vivid-012: CEC adapter cec24 registered for HDMI input 0
    > vivid-012: V4L2 capture device registered as video51
    > vivid-012: CEC adapter cec25 registered for HDMI output 0
    > vivid-012: V4L2 output device registered as video52
    > vivid-012: V4L2 capture device registered as vbi24, supports raw and sliced VBI
    > vivid-012: V4L2 output device registered as vbi25, supports raw and sliced VBI
    > vivid-012: V4L2 capture device registered as swradio12
    > vivid-012: V4L2 receiver device registered as radio24
    > vivid-012: V4L2 transmitter device registered as radio25
    > vivid-012: V4L2 metadata capture device registered as video53
    > vivid-012: V4L2 metadata output device registered as video54
    > vivid-012: V4L2 touch capture device registered as v4l-touch12
    > vivid-013: using multiplanar format API
    > vivid-013: CEC adapter cec26 registered for HDMI input 0
    > vivid-013: V4L2 capture device registered as video55
    > vivid-013: CEC adapter cec27 registered for HDMI output 0
    > vivid-013: V4L2 output device registered as video56
    > vivid-013: V4L2 capture device registered as vbi26, supports raw and sliced VBI
    > vivid-013: V4L2 output device registered as vbi27, supports raw and sliced VBI
    > vivid-013: V4L2 capture device registered as swradio13
    > vivid-013: V4L2 receiver device registered as radio26
    > vivid-013: V4L2 transmitter device registered as radio27
    > vivid-013: V4L2 metadata capture device registered as video57
    > vivid-013: V4L2 metadata output device registered as video58
    > vivid-013: V4L2 touch capture device registered as v4l-touch13
    > vivid-014: using single planar format API
    > vivid-014: CEC adapter cec28 registered for HDMI input 0
    > vivid-014: V4L2 capture device registered as video59
    > vivid-014: CEC adapter cec29 registered for HDMI output 0
    > vivid-014: V4L2 output device registered as video60
    > vivid-014: V4L2 capture device registered as vbi28, supports raw and sliced VBI
    > vivid-014: V4L2 output device registered as vbi29, supports raw and sliced VBI
    > vivid-014: V4L2 capture device registered as swradio14
    > vivid-014: V4L2 receiver device registered as radio28
    > vivid-014: V4L2 transmitter device registered as radio29
    > vivid-014: V4L2 metadata capture device registered as video61
    > vivid-014: V4L2 metadata output device registered as video62
    > vivid-014: V4L2 touch capture device registered as v4l-touch14
    > vivid-015: using multiplanar format API
    > vivid-015: CEC adapter cec30 registered for HDMI input 0
    > vivid-015: V4L2 capture device registered as video63
    > vivid-015: CEC adapter cec31 registered for HDMI output 0
    > vivid-015: V4L2 output device registered as video64
    > vivid-015: V4L2 capture device registered as vbi30, supports raw and sliced VBI
    > vivid-015: V4L2 output device registered as vbi31, supports raw and sliced VBI
    > vivid-015: V4L2 capture device registered as swradio15
    > vivid-015: V4L2 receiver device registered as radio30
    > vivid-015: V4L2 transmitter device registered as radio31
    > vivid-015: V4L2 metadata capture device registered as video65
    > vivid-015: V4L2 metadata output device registered as video66
    > vivid-015: V4L2 touch capture device registered as v4l-touch15
    > vim2m vim2m.0: Device registered as /dev/video67
    > vicodec vicodec.0: Device 'stateful-encoder' registered as /dev/video68
    > vicodec vicodec.0: Device 'stateful-decoder' registered as /dev/video69
    > vicodec vicodec.0: Device 'stateless-decoder' registered as /dev/video70
    > iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
    > iTCO_vendor_support: vendor-support=0
    > device-mapper: uevent: version 1.0.3
    > device-mapper: ioctl: 4.42.0-ioctl (2020-02-27) initialised: dm-devel@redhat.com
    > device-mapper: multipath round-robin: version 1.2.0 loaded
    > device-mapper: multipath queue-length: version 0.2.0 loaded
    > device-mapper: multipath service-time: version 0.3.0 loaded
    > device-mapper: raid: Loading target version 1.15.1
    > Bluetooth: HCI UART driver ver 2.3
    > Bluetooth: HCI UART protocol H4 registered
    > Bluetooth: HCI UART protocol BCSP registered
    > Bluetooth: HCI UART protocol LL registered
    > Bluetooth: HCI UART protocol Three-wire (H5) registered
    > Bluetooth: HCI UART protocol QCA registered
    > Bluetooth: HCI UART protocol AG6XX registered
    > Bluetooth: HCI UART protocol Marvell registered
    > usbcore: registered new interface driver bfusb
    > usbcore: registered new interface driver btusb
    > CAPI 2.0 started up with major 68 (middleware)
    > Modular ISDN core version 1.1.29
    > NET: Registered protocol family 34
    > DSP module 2.0
    > mISDN_dsp: DSP clocks every 80 samples. This equals 1 jiffies.
    > mISDN: Layer-1-over-IP driver Rev. 2.00
    > 0 virtual devices registered
    > intel_pstate: CPU model not supported
    > usnic_verbs: Cisco VIC (USNIC) Verbs Driver v1.0.3 (December 19, 2013)
    > usnic_verbs:usnic_uiom_init:563:
    > IOMMU required but not present or enabled. USNIC QPs will not function w/o enabling IOMMU
    > usnic_verbs:usnic_ib_init:667:
    > Unable to initialize umem with err -1
    > iscsi: registered transport (iser)
    > SoftiWARP attached
    > Driver 'framebuffer' was unable to register with bus_type 'coreboot' because the bus was not initialized.
    > Driver 'memconsole' was unable to register with bus_type 'coreboot' because the bus was not initialized.
    > Driver 'vpd' was unable to register with bus_type 'coreboot' because the bus was not initialized.
    > hid: raw HID events driver (C) Jiri Kosina
    > usbcore: registered new interface driver usbhid
    > usbhid: USB HID core driver
    > ashmem: initialized
    > usbcore: registered new interface driver snd-usb-audio
    > drop_monitor: Initializing network drop monitor service
    > NET: Registered protocol family 26
    > GACT probability on
    > Mirror/redirect action on
    > Simple TC action Loaded
    > netem: version 1.3
    > u32 classifier
    > Performance counters on
    > input device check on
    > Actions configured
    > nf_conntrack_irc: failed to register helpers
    > nf_conntrack_sane: failed to register helpers
    > nf_conntrack_sip: failed to register helpers
    > xt_time: kernel timezone is -0000
    > IPVS: Registered protocols (TCP, UDP, SCTP, AH, ESP)
    > IPVS: Connection hash table configured (size=4096, memory=64Kbytes)
    > IPVS: ipvs loaded.
    > IPVS: [rr] scheduler registered.
    > IPVS: [wrr] scheduler registered.
    > IPVS: [lc] scheduler registered.
    > IPVS: [wlc] scheduler registered.
    > IPVS: [fo] scheduler registered.
    > IPVS: [ovf] scheduler registered.
    > IPVS: [lblc] scheduler registered.
    > IPVS: [lblcr] scheduler registered.
    > IPVS: [dh] scheduler registered.
    > IPVS: [sh] scheduler registered.
    > IPVS: [mh] scheduler registered.
    > IPVS: [sed] scheduler registered.
    > IPVS: [nq] scheduler registered.
    > IPVS: ftp: loaded support on port[0] = 21
    > IPVS: [sip] pe registered.
    > ipip: IPv4 and MPLS over IPv4 tunneling driver
    > gre: GRE over IPv4 demultiplexor driver
    > ip_gre: GRE over IPv4 tunneling driver
    > IPv4 over IPsec tunneling driver
    > ipt_CLUSTERIP: ClusterIP Version 0.8 loaded successfully
    > Initializing XFRM netlink socket
    > IPsec XFRM device driver
    > NET: Registered protocol family 10
    >
    > =============================
    > WARNING: suspicious RCU usage
    > 5.7.0-rc3-next-20200428-syzkaller #0 Not tainted
    > -----------------------------
    > net/ipv6/ip6mr.c:124 RCU-list traversed in non-reader section!!
    >
    > other info that might help us debug this:
    >
    >
    > rcu_scheduler_active = 2, debug_locks = 1
    > 1 lock held by swapper/0/1:
    > #0: ffffffff8a5a6330 (pernet_ops_rwsem){+.+.}-{3:3}, at: register_pernet_subsys+0x16/0x40 net/core/net_namespace.c:1257
    >
    > stack backtrace:
    > CPU: 0 PID: 1 Comm: swapper/0 Not tainted 5.7.0-rc3-next-20200428-syzkaller #0
    > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
    > Call Trace:
    > __dump_stack lib/dump_stack.c:77 [inline]
    > dump_stack+0x18f/0x20d lib/dump_stack.c:118
    > ip6mr_get_table+0x153/0x180 net/ipv6/ip6mr.c:124
    > ip6mr_new_table+0x1b/0x70 net/ipv6/ip6mr.c:382
    > ip6mr_rules_init net/ipv6/ip6mr.c:236 [inline]
    > ip6mr_net_init+0x133/0x3f0 net/ipv6/ip6mr.c:1310
    > ops_init+0xaf/0x420 net/core/net_namespace.c:151
    > __register_pernet_operations net/core/net_namespace.c:1140 [inline]
    > register_pernet_operations+0x346/0x840 net/core/net_namespace.c:1217
    > register_pernet_subsys+0x25/0x40 net/core/net_namespace.c:1258
    > ip6_mr_init+0x49/0x152 net/ipv6/ip6mr.c:1363
    > inet6_init+0x1d7/0x6dc net/ipv6/af_inet6.c:1032
    > do_one_initcall+0x10a/0x7d0 init/main.c:1159
    > do_initcall_level init/main.c:1232 [inline]
    > do_initcalls init/main.c:1248 [inline]
    > do_basic_setup init/main.c:1268 [inline]
    > kernel_init_freeable+0x501/0x5ae init/main.c:1454
    > kernel_init+0xd/0x1bb init/main.c:1359
    > ret_from_fork+0x24/0x30 arch/x86/entry/entry_64.S:351
    > Segment Routing with IPv6
    > mip6: Mobile IPv6
    > sit: IPv6, IPv4 and MPLS over IPv4 tunneling driver
    > ip6_gre: GRE over IPv6 tunneling driver
    > NET: Registered protocol family 17
    > NET: Registered protocol family 15
    > Bridge firewalling registered
    > NET: Registered protocol family 9
    > X25: Linux Version 0.2
    > NET: Registered protocol family 6
    > NET: Registered protocol family 11
    > NET: Registered protocol family 3
    > can: controller area network core (rev 20170425 abi 9)
    > NET: Registered protocol family 29
    > can: raw protocol (rev 20170425)
    > can: broadcast manager protocol (rev 20170425 t)
    > can: netlink gateway (rev 20190810) max_hops=1
    > can: SAE J1939
    > Bluetooth: RFCOMM TTY layer initialized
    > Bluetooth: RFCOMM socket layer initialized
    > Bluetooth: RFCOMM ver 1.11
    > Bluetooth: BNEP (Ethernet Emulation) ver 1.3
    > Bluetooth: BNEP filters: protocol multicast
    > Bluetooth: BNEP socket layer initialized
    > Bluetooth: CMTP (CAPI Emulation) ver 1.0
    > Bluetooth: CMTP socket layer initialized
    > Bluetooth: HIDP (Human Interface Emulation) ver 1.2
    > Bluetooth: HIDP socket layer initialized
    > RPC: Registered rdma transport module.
    > RPC: Registered rdma backchannel transport module.
    > NET: Registered protocol family 33
    > Key type rxrpc registered
    > Key type rxrpc_s registered
    > NET: Registered protocol family 41
    > lec:lane_module_init: lec.c: initialized
    > mpoa:atm_mpoa_init: mpc.c: initialized
    > l2tp_core: L2TP core driver, V2.0
    > l2tp_ppp: PPPoL2TP kernel driver, V2.0
    > l2tp_ip: L2TP IP encapsulation support (L2TPv3)
    > l2tp_netlink: L2TP netlink interface
    > l2tp_eth: L2TP ethernet pseudowire support (L2TPv3)
    > l2tp_ip6: L2TP IP encapsulation support for IPv6 (L2TPv3)
    > NET: Registered protocol family 35
    > 8021q: 802.1Q VLAN Support v1.8
    > DCCP: Activated CCID 2 (TCP-like)
    > DCCP: Activated CCID 3 (TCP-Friendly Rate Control)
    > sctp: Hash tables configured (bind 32/56)
    > NET: Registered protocol family 21
    > Registered RDS/infiniband transport
    > Registered RDS/tcp transport
    > tipc: Activated (version 2.0.0)
    > NET: Registered protocol family 30
    > tipc: Started in single node mode
    > NET: Registered protocol family 43
    > 9pnet: Installing 9P2000 support
    > NET: Registered protocol family 37
    > NET: Registered protocol family 36
    > Key type dns_resolver registered
    > Key type ceph registered
    > libceph: loaded (mon/osd proto 15/24)
    > batman_adv: B.A.T.M.A.N. advanced 2020.2 (compatibility version 15) loaded
    > openvswitch: Open vSwitch switching datapath
    > NET: Registered protocol family 40
    > mpls_gso: MPLS GSO support
    > IPI shorthand broadcast: enabled
    > AVX2 version of gcm_enc/dec engaged.
    > AES CTR mode by8 optimization enabled
    > sched_clock: Marking stable (17444721508, 31811971)->(17487974339, -11440860)
    > registered taskstats version 1
    > Loading compiled-in X.509 certificates
    > Loaded X.509 cert 'Build time autogenerated kernel key: 8b22f477d966bfa6cf9a482acbda6ca1892a4acc'
    > zswap: loaded using pool lzo/zbud
    > debug_vm_pgtable: debug_vm_pgtable: Validating architecture page table helpers
    > Key type ._fscrypt registered
    > Key type .fscrypt registered
    > Key type fscrypt-provisioning registered
    > kAFS: Red Hat AFS client v0.1 registering.
    > FS-Cache: Netfs 'afs' registered for caching
    > Btrfs loaded, crc32c=crc32c-intel
    > Key type big_key registered
    > Key type encrypted registered
    > AppArmor: AppArmor sha1 policy hashing enabled
    > ima: No TPM chip found, activating TPM-bypass!
    > ima: Allocated hash algorithm: sha256
    > ima: No architecture policies found
    > evm: Initialising EVM extended attributes:
    > evm: security.selinux
    > evm: security.SMACK64
    > evm: security.SMACK64EXEC
    > evm: security.SMACK64TRANSMUTE
    > evm: security.SMACK64MMAP
    > evm: security.apparmor
    > evm: security.ima
    > evm: security.capability
    > evm: HMAC attrs: 0x1
    > PM: Magic number: 0:864:473
    > printk: console [netcon0] enabled
    > netconsole: network logging started
    > gtp: GTP module loaded (pdp ctx size 104 bytes)
    > rdma_rxe: loaded
    > cfg80211: Loading compiled-in X.509 certificates for regulatory database
    > cfg80211: Loaded X.509 cert 'sforshee: 00b28ddf47aef9cea7'
    > ALSA device list:
    > #0: Dummy 1
    > #1: Loopback 1
    > #2: Virtual MIDI Card 1
    > md: Waiting for all devices to be available before autodetect
    > md: If you don't use raid, use raid=noautodetect
    > md: Autodetecting RAID arrays.
    > md: autorun ...
    > md: ... autorun DONE.
    > EXT4-fs (sda1): mounted filesystem without journal. Opts: (null)
    > VFS: Mounted root (ext4 filesystem) readonly on device 8:1.
    > devtmpfs: mounted
    > Freeing unused kernel image (initmem) memory: 2776K
    > Kernel memory protection disabled.
    > Run /sbin/init as init process
    > random: systemd: uninitialized urandom read (16 bytes read)
    > random: systemd: uninitialized urandom read (16 bytes read)
    > random: systemd: uninitialized urandom read (16 bytes read)
    > systemd[1]: systemd 232 running in system mode. (+PAM +AUDIT +SELINUX +IMA +APPARMOR +SMACK +SYSVINIT +UTMP +LIBCRYPTSETUP +GCRYPT +GNUTLS +ACL +XZ +LZ4 +SECCOMP +BLKID +ELFUTILS +KMOD +IDN)
    > systemd[1]: Detected virtualization kvm.
    > systemd[1]: Detected architecture x86-64.
    > systemd[1]: Set hostname to <syzkaller>.
    > systemd[1]: Listening on /dev/initctl Compatibility Named Pipe.
    > systemd[1]: Reached target Remote File Systems.
    > systemd[1]: Listening on Syslog Socket.
    > systemd[1]: Listening on Journal Socket.
    > systemd[1]: Listening on udev Kernel Socket.
    >
    > =============================
    > WARNING: suspicious RCU usage
    > 5.7.0-rc3-next-20200428-syzkaller #0 Not tainted
    > -----------------------------
    > security/integrity/evm/evm_main.c:231 RCU-list traversed in non-reader section!!
    >
    > other info that might help us debug this:
    >
    >
    > rcu_scheduler_active = 2, debug_locks = 1
    > 2 locks held by systemd/1:
    > #0: ffff888098dfa450 (sb_writers#8){.+.+}-{0:0}, at: sb_start_write include/linux/fs.h:1659 [inline]
    > #0: ffff888098dfa450 (sb_writers#8){.+.+}-{0:0}, at: mnt_want_write+0x3a/0xb0 fs/namespace.c:354
    > #1: ffff8880988e8310 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: inode_lock include/linux/fs.h:799 [inline]
    > #1: ffff8880988e8310 (&type->i_mutex_dir_key#6){++++}-{3:3}, at: vfs_setxattr+0x92/0xf0 fs/xattr.c:219
    >
    > stack backtrace:
    > CPU: 0 PID: 1 Comm: systemd Not tainted 5.7.0-rc3-next-20200428-syzkaller #0
    > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
    > Call Trace:
    > __dump_stack lib/dump_stack.c:77 [inline]
    > dump_stack+0x18f/0x20d lib/dump_stack.c:118
    > evm_protected_xattr+0x1c2/0x210 security/integrity/evm/evm_main.c:231
    > evm_protect_xattr.isra.0+0xb6/0x3d0 security/integrity/evm/evm_main.c:318
    > evm_inode_setxattr+0xc4/0xf0 security/integrity/evm/evm_main.c:387
    > security_inode_setxattr+0x18f/0x200 security/security.c:1297
    > vfs_setxattr+0xa7/0xf0 fs/xattr.c:220
    > setxattr+0x23d/0x330 fs/xattr.c:451
    > path_setxattr+0x170/0x190 fs/xattr.c:470
    > __do_sys_setxattr fs/xattr.c:485 [inline]
    > __se_sys_setxattr fs/xattr.c:481 [inline]
    > __x64_sys_setxattr+0xc0/0x160 fs/xattr.c:481
    > do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
    > entry_SYSCALL_64_after_hwframe+0x49/0xb3
    > RIP: 0033:0x7fe46005e67a
    > Code: 48 8b 0d 21 18 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 49 89 ca b8 bc 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d ee 17 2b 00 f7 d8 64 89 01 48
    > RSP: 002b:00007fffef423568 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc
    > RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fe46005e67a
    > RDX: 00007fffef4235e0 RSI: 0000556ea53ddf9b RDI: 0000556ea6766760
    > RBP: 0000556ea53ddf9b R08: 0000000000000000 R09: 0000000000000030
    > R10: 0000000000000020 R11: 0000000000000246 R12: 00007fffef4235e0
    > R13: 0000000000000020 R14: 0000000000000000 R15: 0000556ea6751700
    >
    > =============================
    > WARNING: suspicious RCU usage
    > 5.7.0-rc3-next-20200428-syzkaller #0 Not tainted
    > -----------------------------
    > security/device_cgroup.c:357 RCU-list traversed in non-reader section!!
    >
    > other info that might help us debug this:
    >
    >
    > rcu_scheduler_active = 2, debug_locks = 1
    > 4 locks held by systemd/1:
    > #0: ffff8880984f6450 (sb_writers#8){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2910 [inline]
    > #0: ffff8880984f6450 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x4cf/0x5d0 fs/read_write.c:558
    > #1: ffff8880a93c4888 (&of->mutex){+.+.}-{3:3}, at: kernfs_fop_write+0x1b8/0x490 fs/kernfs/file.c:306
    > #2: ffff888096d1f4d0 (kn->active#47){++++}-{0:0}, at: kernfs_fop_write+0x1db/0x490 fs/kernfs/file.c:307
    > #3: ffffffff89e5de48 (devcgroup_mutex){+.+.}-{3:3}, at: devcgroup_access_write+0x93/0x12a7 security/device_cgroup.c:762
    >
    > stack backtrace:
    > CPU: 1 PID: 1 Comm: systemd Not tainted 5.7.0-rc3-next-20200428-syzkaller #0
    > Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
    > Call Trace:
    > __dump_stack lib/dump_stack.c:77 [inline]
    > dump_stack+0x18f/0x20d lib/dump_stack.c:118
    > match_exception_partial+0x2ee/0x340 security/device_cgroup.c:357
    > verify_new_ex+0x176/0x3a0 security/device_cgroup.c:414
    > parent_has_perm security/device_cgroup.c:456 [inline]
    > devcgroup_update_access security/device_cgroup.c:731 [inline]
    > devcgroup_access_write+0xaf5/0x12a7 security/device_cgroup.c:763
    > cgroup_file_write+0x20d/0x710 kernel/cgroup/cgroup.c:3704
    > kernfs_fop_write+0x268/0x490 fs/kernfs/file.c:315
    > __vfs_write+0x76/0x100 fs/read_write.c:495
    > vfs_write+0x268/0x5d0 fs/read_write.c:559
    > ksys_write+0x12d/0x250 fs/read_write.c:612
    > do_syscall_64+0xf6/0x7d0 arch/x86/entry/common.c:295
    > entry_SYSCALL_64_after_hwframe+0x49/0xb3
    > RIP: 0033:0x7fe460052970
    > Code: 73 01 c3 48 8b 0d 28 d5 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 99 2d 2c 00 00 75 10 b8 01 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 7e 9b 01 00 48 89 04 24
    > RSP: 002b:00007fffef423128 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
    > RAX: ffffffffffffffda RBX: 000000000000000a RCX: 00007fe460052970
    > RDX: 000000000000000a RSI: 0000556ea6787c30 RDI: 0000000000000027
    > RBP: 0000556ea6787c30 R08: 0000556ea67af200 R09: 00007fe461a88500
    > R10: 0000000000000073 R11: 0000000000000246 R12: 000000000000000a
    > R13: 0000000000000001 R14: 0000556ea67af120 R15: 000000000000000a
    >
    >
    > ---
    > This bug is generated by a bot. It may contain errors.
    > See https://goo.gl/tpsmEJ for more information about syzbot.
    > syzbot engineers can be reached at syzkaller@googlegroups.com.
    >
    > syzbot will keep track of this bug report. See:
    > https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
    >
    > --
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