ci2 starts bisection 2023-07-12 22:55:17.701910682 +0000 UTC m=+34704.899522862
bisecting fixing commit since 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95
building syzkaller on 90c93c40627cb0ac3c2c7cb99d807fd4c137adcb
ensuring issue is reproducible on original commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95

testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: d0c44caf6f7cc1ba18c2dd35684368284b148277112fe7b7939424e55bfc0227
all runs: crashed: WARNING in media_create_pad_link
representative crash: WARNING in media_create_pad_link, types: [WARNING]
check whether we can drop unnecessary instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: a2ba0a22eadd3fcb058fd30431be204fa09788d4c7f7a6fc502b83235578566f
all runs: crashed: WARNING in media_create_pad_link
representative crash: WARNING in media_create_pad_link, types: [WARNING]
the bug reproduces without the instrumentation
disabling configs for [KASAN LOCKDEP ATOMIC_SLEEP HANG LEAK UBSAN], they are not needed
kconfig minimization: base=3705 full=7272 leaves diff=1985
split chunks (needed=false): <1985>
split chunk #0 of len 1985 into 5 parts
testing without sub-chunk 1/5
testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: c69735bb05caa64427eeefd915a2c60fd6ba9a8fb80f18d1b21645a2e5b6d87f
all runs: crashed: WARNING in media_create_pad_link
representative crash: WARNING in media_create_pad_link, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 2/5
testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 2a90af6f95ac6142c6171567fd260f00f0a7fe84d74dc5f77e4c35849e01d33c
all runs: crashed: WARNING in media_create_pad_link
representative crash: WARNING in media_create_pad_link, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 3/5
testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: f729a9b76d50a38ffc7ca42e3be1fc93ace7cfc9105f00cbe3ba95c403ce3b67
all runs: crashed: WARNING in media_create_pad_link
representative crash: WARNING in media_create_pad_link, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 4/5
testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: fbef8ec08cfa7f97efefbd3efe4b87281393ed04746e7fe5c0389d64498d2b33
all runs: crashed: WARNING in media_create_pad_link
representative crash: WARNING in media_create_pad_link, types: [WARNING]
the chunk can be dropped
testing without sub-chunk 5/5
testing commit 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: fed56eb870813c4d6c82d1837043327586a118ec83cce0adbe5de120b4dd131d
all runs: OK
minimized to 397 configs; suspects: [ARCH_ENABLE_MEMORY_HOTREMOVE ATM BCMA BLK_DEV_ZONED BPF_SYSCALL CARDBUS CFG80211 CFG80211_WEXT CMA CONTIG_ALLOC CRYPTO_842 CRYPTO_LZ4 CRYPTO_LZ4HC CRYPTO_LZO CRYPTO_ZSTD DVB_CORE EXTCON FB FRONTSWAP GPIOLIB HID_ZEROPLUS I2C_MUX IIO IRQ_REMAP LIBNVDIMM MEDIA_ANALOG_TV_SUPPORT MEDIA_CAMERA_SUPPORT MEDIA_CEC_SUPPORT MEDIA_CONTROLLER MEDIA_DIGITAL_TV_SUPPORT MEDIA_RADIO_SUPPORT MEDIA_SDR_SUPPORT MEDIA_SUPPORT MEDIA_TEST_SUPPORT MEDIA_USB_SUPPORT MEMORY_HOTPLUG MEMORY_HOTPLUG_SPARSE MEMORY_HOTREMOVE MFD_VIPERBOARD PARPORT PCCARD PCMCIA PHONET RADIO_ADAPTERS RADIO_SI470X RADIO_SI4713 RC_CORE RFKILL SND SOUND SPI SSB TAP TARGET_CORE TUN USB_AMD5536UDC USB_ATM USB_CONFIGFS USB_CONFIGFS_F_MIDI USB_CONFIGFS_F_PRINTER USB_CONFIGFS_F_TCM USB_CONFIGFS_F_UAC1 USB_CONFIGFS_F_UAC1_LEGACY USB_CONFIGFS_F_UAC2 USB_CONFIGFS_F_UVC USB_CONFIGFS_MASS_STORAGE USB_CONFIGFS_NCM USB_CONFIGFS_OBEX USB_CONFIGFS_PHONET USB_CONFIGFS_RNDIS USB_CONFIGFS_SERIAL USB_CXACRU USB_CYPRESS_CY7C63 USB_CYTHERM USB_DSBR USB_DUMMY_HCD USB_DWC2 USB_DWC2_HOST USB_DWC2_PCI USB_DWC3 USB_DWC3_GADGET USB_DWC3_OF_SIMPLE USB_DWC3_PCI USB_DWC3_ULPI USB_DYNAMIC_MINORS USB_EG20T USB_EHCI_HCD_PLATFORM USB_EHCI_ROOT_HUB_TT USB_EHSET_TEST_FIXTURE USB_EMI26 USB_EMI62 USB_EPSON2888 USB_EZUSB_FX2 USB_FEW_INIT_RETRIES USB_FOTG210_HCD USB_FOTG210_UDC USB_FTDI_ELAN USB_F_ACM USB_F_ECM USB_F_EEM USB_F_FS USB_F_HID USB_F_MASS_STORAGE USB_F_MIDI USB_F_NCM USB_F_OBEX USB_F_PHONET USB_F_PRINTER USB_F_RNDIS USB_F_SERIAL USB_F_SS_LB USB_F_SUBSET USB_F_TCM USB_F_UAC1 USB_F_UAC1_LEGACY USB_F_UAC2 USB_F_UVC USB_GADGET USB_GADGETFS USB_GADGET_DEBUG_FILES USB_GADGET_DEBUG_FS USB_GL860 USB_GOKU USB_GPIO_VBUS USB_GR_UDC USB_GSPCA USB_GSPCA_BENQ USB_GSPCA_CONEX USB_GSPCA_CPIA1 USB_GSPCA_DTCS033 USB_GSPCA_ETOMS USB_GSPCA_FINEPIX USB_GSPCA_JEILINJ USB_GSPCA_JL2005BCD USB_GSPCA_KINECT USB_GSPCA_KONICA USB_GSPCA_MARS USB_GSPCA_MR97310A USB_GSPCA_NW80X USB_GSPCA_OV519 USB_GSPCA_OV534 USB_GSPCA_OV534_9 USB_GSPCA_PAC207 USB_GSPCA_PAC7302 USB_GSPCA_PAC7311 USB_GSPCA_SE401 USB_GSPCA_SN9C2028 USB_GSPCA_SN9C20X USB_GSPCA_SONIXB USB_GSPCA_SONIXJ USB_GSPCA_SPCA1528 USB_GSPCA_SPCA500 USB_GSPCA_SPCA501 USB_GSPCA_SPCA505 USB_GSPCA_SPCA506 USB_GSPCA_SPCA508 USB_GSPCA_SPCA561 USB_GSPCA_SQ905 USB_GSPCA_SQ905C USB_GSPCA_SQ930X USB_GSPCA_STK014 USB_GSPCA_STK1135 USB_GSPCA_STV0680 USB_GSPCA_SUNPLUS USB_GSPCA_T613 USB_GSPCA_TOPRO USB_GSPCA_TOUPTEK USB_GSPCA_TV8532 USB_GSPCA_VC032X USB_GSPCA_VICAM USB_GSPCA_XIRLINK_CIT USB_GSPCA_ZC3XX USB_HACKRF USB_HCD_BCMA USB_HCD_SSB USB_HSIC_USB3503 USB_HSIC_USB4604 USB_HSO USB_HUB_USB251XB USB_IDMOUSE USB_IOWARRIOR USB_IPHETH USB_ISIGHTFW USB_ISP116X_HCD USB_ISP1301 USB_ISP1760 USB_ISP1760_DUAL_ROLE USB_ISP1760_HCD USB_ISP1761_UDC USB_KAWETH USB_KC2190 USB_KEENE USB_LAN78XX USB_LCD USB_LD USB_LEDS_TRIGGER_USBPORT USB_LED_TRIG USB_LEGOTOWER USB_LIBCOMPOSITE USB_LINK_LAYER_TEST USB_M5602 USB_MA901 USB_MAX3421_HCD USB_MDC800 USB_MICROTEK USB_MR800 USB_MSI2500 USB_MUSB_DUAL_ROLE USB_MUSB_HDRC USB_MV_U3D USB_MV_UDC USB_NET2272 USB_NET2272_DMA USB_NET2280 USB_NET_AX88179_178A USB_NET_AX8817X USB_NET_CDCETHER USB_NET_CDC_EEM USB_NET_CDC_MBIM USB_NET_CDC_NCM USB_NET_CDC_SUBSET USB_NET_CDC_SUBSET_ENABLE USB_NET_CH9200 USB_NET_CX82310_ETH USB_NET_DM9601 USB_NET_GL620A USB_NET_HUAWEI_CDC_NCM USB_NET_INT51X1 USB_NET_KALMIA USB_NET_MCS7830 USB_NET_NET1080 USB_NET_PLUSB USB_NET_QMI_WWAN USB_NET_RNDIS_HOST USB_NET_RNDIS_WLAN USB_NET_SMSC75XX USB_NET_SMSC95XX USB_NET_SR9700 USB_NET_SR9800 USB_NET_ZAURUS USB_OHCI_HCD_PLATFORM USB_OTG USB_OTG_FSM USB_OXU210HP_HCD USB_PEGASUS USB_PULSE8_CEC USB_PWC USB_PWC_INPUT_EVDEV USB_PXA27X USB_R8A66597 USB_R8A66597_HCD USB_RAINSHADOW_CEC USB_RAREMONO USB_RAW_GADGET USB_RTL8150 USB_RTL8152 USB_RTL8153_ECM USB_S2255 USB_SERIAL USB_SERIAL_AIRCABLE USB_SERIAL_ARK3116 USB_SERIAL_BELKIN USB_SERIAL_CH341 USB_SERIAL_CONSOLE USB_SERIAL_CP210X USB_SERIAL_CYBERJACK USB_SERIAL_CYPRESS_M8 USB_SERIAL_DEBUG USB_SERIAL_DIGI_ACCELEPORT USB_SERIAL_EDGEPORT USB_SERIAL_EDGEPORT_TI USB_SERIAL_EMPEG USB_SERIAL_F81232 USB_SERIAL_F8153X USB_SERIAL_FTDI_SIO USB_SERIAL_GARMIN USB_SERIAL_GENERIC USB_SERIAL_IPAQ USB_SERIAL_IPW USB_SERIAL_IR USB_SERIAL_IUU USB_SERIAL_KEYSPAN USB_SERIAL_KEYSPAN_PDA USB_SERIAL_KLSI USB_SERIAL_KOBIL_SCT USB_SERIAL_MCT_U232 USB_SERIAL_METRO USB_SERIAL_MOS7715_PARPORT USB_SERIAL_MOS7720 USB_SERIAL_MOS7840 USB_SERIAL_MXUPORT USB_SERIAL_NAVMAN USB_SERIAL_OMNINET USB_SERIAL_OPTICON USB_SERIAL_OPTION USB_SERIAL_OTI6858 USB_SERIAL_PL2303 USB_SERIAL_QCAUX USB_SERIAL_QT2 USB_SERIAL_QUALCOMM USB_SERIAL_SAFE USB_SERIAL_SIERRAWIRELESS USB_SERIAL_SIMPLE USB_SERIAL_SPCP8X5 USB_SERIAL_SSU100 USB_SERIAL_SYMBOL USB_SERIAL_TI USB_SERIAL_UPD78F0730 USB_SERIAL_VISOR USB_SERIAL_WHITEHEAT USB_SERIAL_WISHBONE USB_SERIAL_WWAN USB_SERIAL_XR USB_SERIAL_XSENS_MT USB_SEVSEG USB_SI470X USB_SI4713 USB_SIERRA_NET USB_SISUSBVGA USB_SL811_CS USB_SL811_HCD USB_SL811_HCD_ISO USB_SNP_CORE USB_SPEEDTOUCH USB_STKWEBCAM USB_STORAGE_ALAUDA USB_STORAGE_CYPRESS_ATACB USB_STORAGE_DATAFAB USB_STORAGE_ENE_UB6250 USB_STORAGE_FREECOM USB_STORAGE_ISD200 USB_STORAGE_JUMPSHOT USB_STORAGE_KARMA USB_STORAGE_ONETOUCH USB_STORAGE_SDDR09 USB_STORAGE_SDDR55 USB_STORAGE_USBAT USB_STV06XX USB_TEST USB_TMC USB_TRANCEVIBRATOR USB_U132_HCD USB_UAS USB_UEAGLEATM USB_ULPI_BUS USB_USBNET USB_USS720 USB_U_AUDIO USB_U_ETHER USB_U_SERIAL USB_VIDEO_CLASS USB_VIDEO_CLASS_INPUT_EVDEV USB_VL600 USB_WDM USB_XHCI_DBGCAP USB_XHCI_PLATFORM USB_XUSBATM USB_YUREX USB_ZR364XX USERFAULTFD USERIO USERMODE_DRIVER USER_RETURN_NOTIFIER U_SERIAL_CONSOLE V4L2_MEM2MEM_DEV V4L_TEST_DRIVERS VALIDATE_FS_PARSER VDPA VETH VFIO VFIO_IOMMU_TYPE1 VFIO_PCI VFIO_PCI_CORE VFIO_PCI_INTX VFIO_PCI_MMAP VFIO_VIRQFD VGASTATE VHOST VHOST_CROSS_ENDIAN_LEGACY VHOST_IOTLB VHOST_NET VHOST_RING VHOST_VDPA VHOST_VSOCK VIDEOBUF2_CORE VIDEOBUF2_DMA_CONTIG VIDEOBUF2_DMA_SG VIDEOBUF2_MEMOPS VIDEOBUF2_V4L2 VIDEOBUF2_VMALLOC VIDEOBUF_GEN VIDEOBUF_VMALLOC VIDEO_AU0828 VIDEO_AU0828_RC VIDEO_AU0828_V4L2 VIDEO_CPIA2 VIDEO_CS53L32A VIDEO_CX231XX VIDEO_CX231XX_ALSA VIDEO_CX231XX_DVB VIDEO_CX231XX_RC VIDEO_CX2341X VIDEO_CX25840 VIDEO_DEV VIDEO_EM28XX VIDEO_EM28XX_ALSA VIDEO_EM28XX_DVB VIDEO_EM28XX_RC VIDEO_EM28XX_V4L2 VIDEO_GO7007 VIDEO_GO7007_LOADER VIDEO_GO7007_USB VIDEO_GO7007_USB_S2250_BOARD VIDEO_HDPVR VIDEO_MSP3400 VIDEO_PVRUSB2 VIDEO_PVRUSB2_DVB VIDEO_PVRUSB2_SYSFS VIDEO_SAA711X VIDEO_STK1160 VIDEO_STK1160_COMMON VIDEO_TM6000 VIDEO_TM6000_ALSA VIDEO_TM6000_DVB VIDEO_TUNER VIDEO_TVEEPROM VIDEO_USBTV VIDEO_V4L2 VIDEO_V4L2_I2C VIDEO_V4L2_SUBDEV_API VIDEO_V4L2_TPG VIDEO_VICODEC VIDEO_VIM2M VIDEO_VIMC VIDEO_VIVID VIDEO_VIVID_CEC VIDEO_WM8775 VIPERBOARD_ADC VIRTIO_BALLOON VIRTIO_DMA_SHARED_BUFFER VIRTIO_MEM VIRTIO_MMIO VIRTIO_MMIO_CMDLINE_DEVICES VIRTIO_PMEM VIRTIO_VDPA VIRTIO_VSOCKETS VIRTIO_VSOCKETS_COMMON VIRT_WIFI VLAN_8021Q VLAN_8021Q_GVRP VLAN_8021Q_MVRP VMAP_PFN VMWARE_VMCI VMXNET3 VP_VDPA VSOCKETS VSOCKETS_DIAG VSOCKETS_LOOPBACK VSOCKMON VT_HW_CONSOLE_BINDING VXFS_FS WANT_DEV_COREDUMP WEXT_CORE WEXT_PRIV WEXT_PROC WIREGUARD WIRELESS WIRELESS_EXT WLAN WLAN_VENDOR_ADMTEK X86_SGX X86_X2APIC X86_X32 XARRAY_MULTI XDP_SOCKETS XDP_SOCKETS_DIAG XFRM_ESPINTCP XFRM_INTERFACE XFRM_IPCOMP XFRM_MIGRATE XFRM_OFFLOAD XFRM_STATISTICS XFRM_SUB_POLICY XFRM_USER_COMPAT XFS_FS XFS_POSIX_ACL XFS_QUOTA XFS_RT XFS_SUPPORT_V4 XOR_BLOCKS YENTA YENTA_ENE_TUNE YENTA_O2 YENTA_RICOH YENTA_TI YENTA_TOSHIBA ZBUD ZEROPLUS_FF ZONEFS_FS ZPOOL ZRAM ZRAM_DEF_COMP_LZORLE ZSMALLOC ZSTD_COMPRESS ZSWAP ZSWAP_COMPRESSOR_DEFAULT_LZO ZSWAP_ZPOOL_DEFAULT_ZBUD]
disabling configs for [ATOMIC_SLEEP HANG LEAK UBSAN KASAN LOCKDEP], they are not needed
testing current HEAD d54cfc420586425d418a53871290cc4a59d33501
testing commit d54cfc420586425d418a53871290cc4a59d33501 gcc
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.40
kernel signature: 16684371bca4011ac35b1556a54fc202081f38517f0c8422b1bce48adada0725
all runs: crashed: WARNING in media_create_pad_link
representative crash: WARNING in media_create_pad_link, types: [WARNING]
crash still not fixed/happens on the oldest tested release
revisions tested: 8, total time: 2h51m0.131329373s (build: 2h20m21.400874348s, test: 28m17.463781603s)
crash still not fixed on HEAD or HEAD had kernel test errors
commit msg: Linux 5.15.120
crash: WARNING in media_create_pad_link
usb 1-1: New USB device found, idVendor=0bd3, idProduct=0d55, bcdDevice=69.6a
usb 1-1: New USB device strings: Mfr=64, Product=0, SerialNumber=0
usb 1-1: Manufacturer: syz
usb 1-1: config 0 descriptor??
usb 1-1: Found UVC 0.00 device <unnamed> (0bd3:0d55)
uvcvideo 1-1:0.0: Entity type for entity Output 255 was not initialized!
------------[ cut here ]------------
WARNING: CPU: 0 PID: 664 at drivers/media/mc/mc-entity.c:667 media_create_pad_link+0x138/0x180 drivers/media/mc/mc-entity.c:713
Modules linked in:
CPU: 0 PID: 664 Comm: kworker/0:2 Not tainted 5.15.120-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
Workqueue: usb_hub_wq hub_event
RIP: 0010:media_create_pad_link+0x138/0x180 drivers/media/mc/mc-entity.c:667
Code: 41 83 47 3a 01 48 83 c4 08 5b 5d 41 5c 41 5d 41 5e 41 5f c3 0f 0b 48 83 c4 08 b8 ea ff ff ff 5b 5d 41 5c 41 5d 41 5e 41 5f c3 <0f> 0b b8 ea ff ff ff eb d2 0f 0b b8 ea ff ff ff eb c9 0f 0b b8 ea
RSP: 0018:ffffc90000f53748 EFLAGS: 00010246
RAX: ffff88810dac3c80 RBX: ffff88810dac2880 RCX: 0000000000000000
RDX: ffff88810dac2880 RSI: 0000000000000000 RDI: ffff88810dac3c80
RBP: ffff88810dac2880 R08: 0000000000000003 R09: 0000000000000001
R10: 0000000000000000 R11: 0000000000000001 R12: ffff88810f1c6918
R13: 0000000000000000 R14: ffff88810dac2800 R15: ffff88810dac3c80
FS:  0000000000000000(0000) GS:ffff888237c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffe8f749718 CR3: 0000000110ca5000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 uvc_mc_create_links drivers/media/usb/uvc/uvc_entity.c:50 [inline]
 uvc_mc_register_entities+0x1c6/0x270 drivers/media/usb/uvc/uvc_entity.c:151
 uvc_register_chains drivers/media/usb/uvc/uvc_driver.c:2306 [inline]
 uvc_probe.cold+0x731/0xfb3 drivers/media/usb/uvc/uvc_driver.c:2443
 usb_probe_interface+0xda/0x290 drivers/usb/core/driver.c:396
 call_driver_probe drivers/base/dd.c:516 [inline]
 really_probe+0xbc/0x3b0 drivers/base/dd.c:595
 __driver_probe_device+0xd1/0x120 drivers/base/dd.c:755
 driver_probe_device+0x19/0x90 drivers/base/dd.c:785
 __device_attach_driver+0x71/0xf0 drivers/base/dd.c:907
 bus_for_each_drv+0x79/0xc0 drivers/base/bus.c:427
 __device_attach+0xb9/0x210 drivers/base/dd.c:979
 bus_probe_device+0x97/0xb0 drivers/base/bus.c:487
 device_add+0x421/0x930 drivers/base/core.c:3394
 usb_set_configuration+0x4f7/0x8e0 drivers/usb/core/message.c:2170
 usb_generic_driver_probe+0x47/0x70 drivers/usb/core/generic.c:238
 usb_probe_device+0x2b/0xf0 drivers/usb/core/driver.c:293
 call_driver_probe drivers/base/dd.c:516 [inline]
 really_probe+0xbc/0x3b0 drivers/base/dd.c:595
 __driver_probe_device+0xd1/0x120 drivers/base/dd.c:755
 driver_probe_device+0x19/0x90 drivers/base/dd.c:785
 __device_attach_driver+0x71/0xf0 drivers/base/dd.c:907
 bus_for_each_drv+0x79/0xc0 drivers/base/bus.c:427
 __device_attach+0xb9/0x210 drivers/base/dd.c:979
 bus_probe_device+0x97/0xb0 drivers/base/bus.c:487
 device_add+0x421/0x930 drivers/base/core.c:3394
 usb_new_device.cold+0xbc/0x3be drivers/usb/core/hub.c:2568
 hub_port_connect drivers/usb/core/hub.c:5358 [inline]
 hub_port_connect_change drivers/usb/core/hub.c:5502 [inline]
 port_event drivers/usb/core/hub.c:5648 [inline]
 hub_event+0xe9a/0x1860 drivers/usb/core/hub.c:5730
 process_one_work+0x26f/0x4e0 kernel/workqueue.c:2307
 worker_thread+0x4d/0x3b0 kernel/workqueue.c:2454
 kthread+0x122/0x140 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298
 </TASK>