Warning: Permanently added '10.128.1.22' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [  119.726663][   T78] usb 1-1: new high-speed USB device number 2 using dummy_hcd
[  119.816885][   T78] usb 1-1: Using ep0 maxpacket: 32
[  119.937475][   T78] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x82 has invalid wMaxPacketSize 0
[  120.106742][   T78] usb 1-1: New USB device found, idVendor=eb1a, idProduct=a316, bcdDevice=5c.26
[  120.115918][   T78] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  120.124068][   T78] usb 1-1: Product: syz
[  120.128360][   T78] usb 1-1: Manufacturer: syz
[  120.132959][   T78] usb 1-1: SerialNumber: syz
[  120.139471][   T78] usb 1-1: config 0 descriptor??
[  120.178345][   T78] em28xx 1-1:0.0: New device syz syz @ 480 Mbps (eb1a:a316, interface 0, class 0)
[  120.187956][   T78] em28xx 1-1:0.0: Video interface 0 found:
executing program
[  120.416743][   T78] em28xx 1-1:0.0: unknown em28xx chip ID (0)
[  120.636785][   T78] em28xx 1-1:0.0: reading from i2c device at 0xa0 failed (error=-5)
[  120.645012][   T78] em28xx 1-1:0.0: board has no eeprom
[  120.757090][   T78] em28xx 1-1:0.0: Identified as Kworld PlusTV HD Hybrid 330 (card=57)
[  120.765529][   T78] em28xx 1-1:0.0: analog set to bulk mode.
[  120.773909][   T78] usb 1-1: USB disconnect, device number 2
[  120.783740][   T78] em28xx 1-1:0.0: Disconnecting em28xx
[  120.789676][ T1793] em28xx 1-1:0.0: Registering V4L2 extension
[  120.805140][ T1793] em28xx 1-1:0.0: Config register raw data: 0xffffffed
[  120.812182][ T1793] em28xx 1-1:0.0: AC97 chip type couldn't be determined
[  120.819351][ T1793] em28xx 1-1:0.0: No AC97 audio processor
[  120.826471][ T1793] usb 1-1: Decoder not found
[  120.831268][ T1793] em28xx 1-1:0.0: failed to create media graph
[  120.837687][ T1793] em28xx 1-1:0.0: V4L2 device video0 deregistered
[  120.845520][ T1793] em28xx 1-1:0.0: Binding DVB extension
[  120.851814][ T1793] em28xx 1-1:0.0: no endpoint for DVB mode and transfer type 0
[  120.859422][ T1793] em28xx 1-1:0.0: failed to pre-allocate USB transfer buffers for DVB.
[  120.867779][ T1793] em28xx 1-1:0.0: Remote control support is not available for this card.
[  120.876450][   T78] em28xx 1-1:0.0: Closing input extension
[  120.884603][   T78] em28xx 1-1:0.0: Freeing device
[  121.266645][   T78] usb 1-1: new high-speed USB device number 3 using dummy_hcd
[  121.356783][   T78] usb 1-1: Using ep0 maxpacket: 32
[  121.477183][   T78] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x82 has invalid wMaxPacketSize 0
[  121.646721][   T78] usb 1-1: New USB device found, idVendor=eb1a, idProduct=a316, bcdDevice=5c.26
[  121.656330][   T78] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  121.664545][   T78] usb 1-1: Product: syz
[  121.668744][   T78] usb 1-1: Manufacturer: syz
[  121.673456][   T78] usb 1-1: SerialNumber: syz
[  121.679638][   T78] usb 1-1: config 0 descriptor??
[  121.718111][   T78] em28xx 1-1:0.0: New device syz syz @ 480 Mbps (eb1a:a316, interface 0, class 0)
[  121.727777][   T78] em28xx 1-1:0.0: Video interface 0 found:
executing program
[  121.956813][   T78] em28xx 1-1:0.0: unknown em28xx chip ID (0)
[  122.176701][   T78] em28xx 1-1:0.0: reading from i2c device at 0xa0 failed (error=-5)
[  122.185256][   T78] em28xx 1-1:0.0: board has no eeprom
[  122.297211][   T78] em28xx 1-1:0.0: Identified as Kworld PlusTV HD Hybrid 330 (card=57)
[  122.305823][   T78] em28xx 1-1:0.0: analog set to bulk mode.
[  122.313793][   T78] usb 1-1: USB disconnect, device number 3
[  122.320285][   T78] em28xx 1-1:0.0: Disconnecting em28xx
[  122.325999][ T1793] em28xx 1-1:0.0: Registering V4L2 extension
[  122.344877][ T1793] em28xx 1-1:0.0: Config register raw data: 0xffffffed
[  122.351826][ T1793] em28xx 1-1:0.0: AC97 chip type couldn't be determined
[  122.359081][ T1793] em28xx 1-1:0.0: No AC97 audio processor
[  122.365578][ T1793] usb 1-1: Decoder not found
[  122.370262][ T1793] em28xx 1-1:0.0: failed to create media graph
[  122.376740][ T1793] em28xx 1-1:0.0: V4L2 device video0 deregistered
[  122.383834][ T1793] em28xx 1-1:0.0: Binding DVB extension
[  122.389556][ T1793] em28xx 1-1:0.0: no endpoint for DVB mode and transfer type 0
[  122.397221][ T1793] em28xx 1-1:0.0: failed to pre-allocate USB transfer buffers for DVB.
[  122.405797][ T1793] em28xx 1-1:0.0: Remote control support is not available for this card.
[  122.414401][   T78] em28xx 1-1:0.0: Closing input extension
[  122.421314][   T78] em28xx 1-1:0.0: Freeing device
[  122.786711][   T78] usb 1-1: new high-speed USB device number 4 using dummy_hcd
[  122.876759][   T78] usb 1-1: Using ep0 maxpacket: 32
[  122.997187][   T78] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x82 has invalid wMaxPacketSize 0
[  123.166781][   T78] usb 1-1: New USB device found, idVendor=eb1a, idProduct=a316, bcdDevice=5c.26
[  123.176107][   T78] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  123.184246][   T78] usb 1-1: Product: syz
[  123.188533][   T78] usb 1-1: Manufacturer: syz
[  123.193148][   T78] usb 1-1: SerialNumber: syz
[  123.199208][   T78] usb 1-1: config 0 descriptor??
[  123.237984][   T78] em28xx 1-1:0.0: New device syz syz @ 480 Mbps (eb1a:a316, interface 0, class 0)
[  123.247403][   T78] em28xx 1-1:0.0: Video interface 0 found:
executing program
[  123.476793][   T78] em28xx 1-1:0.0: unknown em28xx chip ID (0)
[  123.696705][   T78] em28xx 1-1:0.0: reading from i2c device at 0xa0 failed (error=-5)
[  123.704733][   T78] em28xx 1-1:0.0: board has no eeprom
[  123.817192][   T78] em28xx 1-1:0.0: Identified as Kworld PlusTV HD Hybrid 330 (card=57)
[  123.825527][   T78] em28xx 1-1:0.0: analog set to bulk mode.
[  123.833340][   T78] usb 1-1: USB disconnect, device number 4
[  123.839831][   T78] em28xx 1-1:0.0: Disconnecting em28xx
[  123.845372][ T1793] em28xx 1-1:0.0: Registering V4L2 extension
[  123.861897][ T1793] em28xx 1-1:0.0: Config register raw data: 0xffffffed
[  123.868858][ T1793] em28xx 1-1:0.0: AC97 chip type couldn't be determined
[  123.875983][ T1793] em28xx 1-1:0.0: No AC97 audio processor
[  123.882916][ T1793] usb 1-1: Decoder not found
[  123.887653][ T1793] em28xx 1-1:0.0: failed to create media graph
[  123.894039][ T1793] em28xx 1-1:0.0: V4L2 device video0 deregistered
[  123.901923][ T1793] em28xx 1-1:0.0: Binding DVB extension
[  123.907837][ T1793] em28xx 1-1:0.0: no endpoint for DVB mode and transfer type 0
[  123.915399][ T1793] em28xx 1-1:0.0: failed to pre-allocate USB transfer buffers for DVB.
[  123.923957][ T1793] em28xx 1-1:0.0: Remote control support is not available for this card.
[  123.932655][   T78] em28xx 1-1:0.0: Closing input extension
[  123.939537][   T78] em28xx 1-1:0.0: Freeing device
[  124.296665][   T78] usb 1-1: new high-speed USB device number 5 using dummy_hcd
[  124.386736][   T78] usb 1-1: Using ep0 maxpacket: 32
[  124.507180][   T78] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x82 has invalid wMaxPacketSize 0
[  124.676735][   T78] usb 1-1: New USB device found, idVendor=eb1a, idProduct=a316, bcdDevice=5c.26
[  124.686171][   T78] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  124.694353][   T78] usb 1-1: Product: syz
[  124.698561][   T78] usb 1-1: Manufacturer: syz
[  124.703245][   T78] usb 1-1: SerialNumber: syz
[  124.709599][   T78] usb 1-1: config 0 descriptor??
[  124.748119][   T78] em28xx 1-1:0.0: New device syz syz @ 480 Mbps (eb1a:a316, interface 0, class 0)
[  124.758372][   T78] em28xx 1-1:0.0: Video interface 0 found:
executing program
[  125.006686][   T78] em28xx 1-1:0.0: unknown em28xx chip ID (0)
[  125.236696][   T78] em28xx 1-1:0.0: reading from i2c device at 0xa0 failed (error=-5)
[  125.245029][   T78] em28xx 1-1:0.0: board has no eeprom
[  125.357003][   T78] em28xx 1-1:0.0: Identified as Kworld PlusTV HD Hybrid 330 (card=57)
[  125.365746][   T78] em28xx 1-1:0.0: analog set to bulk mode.
[  125.373852][   T78] usb 1-1: USB disconnect, device number 5
[  125.381017][   T78] em28xx 1-1:0.0: Disconnecting em28xx
[  125.387338][ T1793] em28xx 1-1:0.0: Registering V4L2 extension
[  125.403106][ T1793] em28xx 1-1:0.0: Config register raw data: 0xffffffed
[  125.410220][ T1793] em28xx 1-1:0.0: AC97 chip type couldn't be determined
[  125.417590][ T1793] em28xx 1-1:0.0: No AC97 audio processor
[  125.424047][ T1793] usb 1-1: Decoder not found
[  125.428756][ T1793] em28xx 1-1:0.0: failed to create media graph
[  125.435175][ T1793] em28xx 1-1:0.0: V4L2 device video0 deregistered
[  125.443105][ T1793] em28xx 1-1:0.0: Binding DVB extension
[  125.449040][ T1793] em28xx 1-1:0.0: no endpoint for DVB mode and transfer type 0
[  125.457187][ T1793] em28xx 1-1:0.0: failed to pre-allocate USB transfer buffers for DVB.
[  125.465805][ T1793] em28xx 1-1:0.0: Remote control support is not available for this card.
[  125.474455][   T78] em28xx 1-1:0.0: Closing input extension
[  125.481339][   T78] em28xx 1-1:0.0: Freeing device
[  125.846668][   T78] usb 1-1: new high-speed USB device number 6 using dummy_hcd
[  125.936724][   T78] usb 1-1: Using ep0 maxpacket: 32
[  126.056804][   T78] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x82 has invalid wMaxPacketSize 0
[  126.226770][   T78] usb 1-1: New USB device found, idVendor=eb1a, idProduct=a316, bcdDevice=5c.26
[  126.236213][   T78] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  126.244441][   T78] usb 1-1: Product: syz
[  126.248950][   T78] usb 1-1: Manufacturer: syz
[  126.254086][   T78] usb 1-1: SerialNumber: syz
[  126.260555][   T78] usb 1-1: config 0 descriptor??
[  126.308122][   T78] em28xx 1-1:0.0: New device syz syz @ 480 Mbps (eb1a:a316, interface 0, class 0)
[  126.317799][   T78] em28xx 1-1:0.0: Video interface 0 found:
executing program
[  126.546826][   T78] em28xx 1-1:0.0: unknown em28xx chip ID (0)
[  126.766743][   T78] em28xx 1-1:0.0: reading from i2c device at 0xa0 failed (error=-5)
[  126.774935][   T78] em28xx 1-1:0.0: board has no eeprom
[  126.887171][   T78] em28xx 1-1:0.0: Identified as Kworld PlusTV HD Hybrid 330 (card=57)
[  126.895421][   T78] em28xx 1-1:0.0: analog set to bulk mode.
[  126.901872][ T1793] em28xx 1-1:0.0: Registering V4L2 extension
[  126.917776][   T78] usb 1-1: USB disconnect, device number 6
[  126.924324][   T78] em28xx 1-1:0.0: Disconnecting em28xx
[  126.936721][ T1793] em28xx 1-1:0.0: reading from i2c device at 0xb8 failed (error=-5)
[  126.950224][ T1793] em28xx 1-1:0.0: Config register raw data: 0xffffffed
[  126.957172][ T1793] em28xx 1-1:0.0: AC97 chip type couldn't be determined
[  126.964314][ T1793] em28xx 1-1:0.0: No AC97 audio processor
[  126.971420][ T1793] usb 1-1: Decoder not found
[  126.976120][ T1793] em28xx 1-1:0.0: failed to create media graph
[  126.982658][ T1793] em28xx 1-1:0.0: V4L2 device video0 deregistered
[  126.989930][ T1793] em28xx 1-1:0.0: Binding DVB extension
[  126.995764][ T1793] em28xx 1-1:0.0: no endpoint for DVB mode and transfer type 0
[  127.003924][ T1793] em28xx 1-1:0.0: failed to pre-allocate USB transfer buffers for DVB.
[  127.012361][ T1793] em28xx 1-1:0.0: Remote control support is not available for this card.
[  127.021456][   T78] em28xx 1-1:0.0: Closing input extension
[  127.028578][   T78] em28xx 1-1:0.0: Freeing device
[  127.386677][   T78] usb 1-1: new high-speed USB device number 7 using dummy_hcd
[  127.476730][   T78] usb 1-1: Using ep0 maxpacket: 32
[  127.597274][   T78] usb 1-1: config 0 interface 0 altsetting 0 endpoint 0x82 has invalid wMaxPacketSize 0
[  127.766755][   T78] usb 1-1: New USB device found, idVendor=eb1a, idProduct=a316, bcdDevice=5c.26
[  127.776228][   T78] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[  127.784490][   T78] usb 1-1: Product: syz
[  127.788894][   T78] usb 1-1: Manufacturer: syz
[  127.793611][   T78] usb 1-1: SerialNumber: syz
[  127.799941][   T78] usb 1-1: config 0 descriptor??
[  127.838100][   T78] em28xx 1-1:0.0: New device syz syz @ 480 Mbps (eb1a:a316, interface 0, class 0)
[  127.847751][   T78] em28xx 1-1:0.0: Video interface 0 found:
executing program
[  128.076732][   T78] em28xx 1-1:0.0: unknown em28xx chip ID (0)
[  128.296737][   T78] em28xx 1-1:0.0: reading from i2c device at 0xa0 failed (error=-5)
[  128.305323][   T78] em28xx 1-1:0.0: board has no eeprom
[  128.417161][   T78] em28xx 1-1:0.0: Identified as Kworld PlusTV HD Hybrid 330 (card=57)
[  128.425590][   T78] em28xx 1-1:0.0: analog set to bulk mode.
[  128.432131][ T1793] em28xx 1-1:0.0: Registering V4L2 extension
[  128.439973][   T78] usb 1-1: USB disconnect, device number 7
[  128.454432][ T1793] em28xx 1-1:0.0: reading from i2c device at 0xb8 failed (error=-19)
[  128.463229][   T78] em28xx 1-1:0.0: Disconnecting em28xx
[  128.473365][ T1793] em28xx 1-1:0.0: Config register raw data: 0xffffffed
[  128.480388][ T1793] em28xx 1-1:0.0: AC97 chip type couldn't be determined
[  128.487825][ T1793] em28xx 1-1:0.0: No AC97 audio processor
[  128.494453][ T1793] usb 1-1: Decoder not found
[  128.499272][ T1793] em28xx 1-1:0.0: failed to create media graph
[  128.505547][ T1793] em28xx 1-1:0.0: V4L2 device video0 deregistered
[  128.513461][ T1793] em28xx 1-1:0.0: Binding DVB extension
[  128.513623][ T1835] ==================================================================
[  128.519530][ T1793] em28xx 1-1:0.0: no endpoint for DVB mode and transfer type 0
[  128.527649][ T1835] BUG: KASAN: use-after-free in v4l2_fh_init+0x279/0x2c0
[  128.527660][ T1835] Read of size 8 at addr ffff8881cca78870 by task v4l_id/1835
[  128.527663][ T1835] 
[  128.527676][ T1835] CPU: 0 PID: 1835 Comm: v4l_id Not tainted 5.6.0-rc3-syzkaller #0
[  128.527682][ T1835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  128.527686][ T1835] Call Trace:
[  128.527702][ T1835]  dump_stack+0xef/0x16e
[  128.527712][ T1835]  ? v4l2_fh_init+0x279/0x2c0
[  128.527721][ T1835]  ? v4l2_fh_init+0x279/0x2c0
[  128.527737][ T1835]  print_address_description.constprop.0.cold+0xd3/0x314
[  128.527748][ T1835]  ? v4l2_fh_init+0x279/0x2c0
[  128.527759][ T1835]  ? v4l2_fh_init+0x279/0x2c0
[  128.527779][ T1835]  __kasan_report.cold+0x37/0x77
[  128.527790][ T1835]  ? v4l2_fh_init+0x279/0x2c0
[  128.527802][ T1835]  kasan_report+0xe/0x20
[  128.527813][ T1835]  v4l2_fh_init+0x279/0x2c0
[  128.527824][ T1835]  v4l2_fh_open+0x88/0xc0
[  128.527837][ T1835]  em28xx_v4l2_open+0x11a/0x570
[  128.527849][ T1835]  v4l2_open+0x20f/0x3d0
[  128.527861][ T1835]  ? v4l2_release+0x390/0x390
[  128.527871][ T1835]  chrdev_open+0x219/0x5c0
[  128.527881][ T1835]  ? cdev_put.part.0+0x50/0x50
[  128.527902][ T1835]  do_dentry_open+0x494/0x1120
[  128.535604][ T1793] em28xx 1-1:0.0: failed to pre-allocate USB transfer buffers for DVB.
[  128.542777][ T1835]  ? cdev_put.part.0+0x50/0x50
[  128.542792][ T1835]  ? chmod_common+0x3c0/0x3c0
[  128.542804][ T1835]  ? inode_permission+0xbe/0x3a0
[  128.542814][ T1835]  path_openat+0x1222/0x32a0
[  128.542827][ T1835]  ? path_mountpoint.isra.0+0x370/0x370
[  128.542839][ T1835]  ? __lock_acquire+0x145e/0x3b60
[  128.542852][ T1835]  do_filp_open+0x192/0x260
[  128.542872][ T1835]  ? may_open_dev+0xf0/0xf0
[  128.550440][ T1793] em28xx 1-1:0.0: Remote control support is not available for this card.
[  128.552704][ T1835]  ? __alloc_fd+0x46d/0x600
[  128.560737][   T78] em28xx 1-1:0.0: Closing input extension
[  128.570671][ T1835]  ? do_raw_spin_lock+0x129/0x290
[  128.570685][ T1835]  ? _raw_spin_unlock+0x1a/0x30
[  128.570696][ T1835]  ? __alloc_fd+0x46d/0x600
[  128.570706][ T1835]  do_sys_openat2+0x54c/0x740
[  128.570718][ T1835]  ? file_open_root+0x3d0/0x3d0
[  128.570736][ T1835]  ? up_read+0x1ab/0x750
[  128.754749][ T1835]  do_sys_open+0xc3/0x140
[  128.759224][ T1835]  ? filp_open+0x70/0x70
[  128.763646][ T1835]  ? trace_hardirqs_off_caller+0x55/0x200
[  128.769506][ T1835]  do_syscall_64+0xb6/0x5a0
[  128.774079][ T1835]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  128.780268][ T1835] RIP: 0033:0x7f72c6426120
[  128.784846][ T1835] Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24
[  128.805409][ T1835] RSP: 002b:00007fff155c5798 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
[  128.813868][ T1835] RAX: ffffffffffffffda RBX: 00007fff155c58f8 RCX: 00007f72c6426120
[  128.821889][ T1835] RDX: 00007f72c66db138 RSI: 0000000000000000 RDI: 00007fff155c6f1e
[  128.829917][ T1835] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[  128.837892][ T1835] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000400884
[  128.846005][ T1835] R13: 00007fff155c58f0 R14: 0000000000000000 R15: 0000000000000000
[  128.854035][ T1835] 
[  128.856395][ T1835] Allocated by task 1793:
[  128.861136][ T1835]  save_stack+0x1b/0x80
[  128.865547][ T1835]  __kasan_kmalloc.constprop.0+0xbf/0xd0
[  128.871212][ T1835]  em28xx_v4l2_init.cold+0x93/0x33eb
[  128.876688][ T1835]  em28xx_init_extension+0x12f/0x1f0
[  128.882267][ T1835]  request_module_async+0x5d/0x70
[  128.887862][ T1835]  process_one_work+0x94b/0x1620
[  128.893196][ T1835]  worker_thread+0x96/0xe20
[  128.898472][ T1835]  kthread+0x318/0x420
[  128.902724][ T1835]  ret_from_fork+0x24/0x30
[  128.907179][ T1835] 
[  128.909507][ T1835] Freed by task 1793:
[  128.913498][ T1835]  save_stack+0x1b/0x80
[  128.917653][ T1835]  __kasan_slab_free+0x117/0x160
[  128.922633][ T1835]  kfree+0xd5/0x300
[  128.926868][ T1835]  em28xx_v4l2_init.cold+0x2d4/0x33eb
[  128.932769][ T1835]  em28xx_init_extension+0x12f/0x1f0
[  128.939719][ T1835]  request_module_async+0x5d/0x70
[  128.945197][ T1835]  process_one_work+0x94b/0x1620
[  128.951362][ T1835]  worker_thread+0x96/0xe20
[  128.955916][ T1835]  kthread+0x318/0x420
[  128.960204][ T1835]  ret_from_fork+0x24/0x30
[  128.964609][ T1835] 
[  128.967061][ T1835] The buggy address belongs to the object at ffff8881cca78000
[  128.967061][ T1835]  which belongs to the cache kmalloc-8k of size 8192
[  128.981468][ T1835] The buggy address is located 2160 bytes inside of
[  128.981468][ T1835]  8192-byte region [ffff8881cca78000, ffff8881cca7a000)
[  128.995092][ T1835] The buggy address belongs to the page:
[  129.000732][ T1835] page:ffffea0007329e00 refcount:1 mapcount:0 mapping:ffff8881da00c500 index:0x0 compound_mapcount: 0
[  129.011665][ T1835] flags: 0x200000000010200(slab|head)
[  129.017083][ T1835] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c500
[  129.025671][ T1835] raw: 0000000000000000 0000000080020002 00000001ffffffff 0000000000000000
[  129.034530][ T1835] page dumped because: kasan: bad access detected
[  129.041061][ T1835] 
[  129.043387][ T1835] Memory state around the buggy address:
[  129.049162][ T1835]  ffff8881cca78700: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  129.057288][ T1835]  ffff8881cca78780: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  129.065495][ T1835] >ffff8881cca78800: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  129.073765][ T1835]                                                              ^
[  129.081819][ T1835]  ffff8881cca78880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  129.091567][ T1835]  ffff8881cca78900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
[  129.100085][ T1835] ==================================================================
[  129.109127][ T1835] Disabling lock debugging due to kernel taint
[  129.115630][ T1835] Kernel panic - not syncing: panic_on_warn set ...
[  129.122396][ T1835] CPU: 0 PID: 1835 Comm: v4l_id Tainted: G    B             5.6.0-rc3-syzkaller #0
[  129.132439][ T1835] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[  129.142972][ T1835] Call Trace:
[  129.146265][ T1835]  dump_stack+0xef/0x16e
[  129.150744][ T1835]  panic+0x2aa/0x6e1
[  129.154989][ T1835]  ? add_taint.cold+0x16/0x16
[  129.160095][ T1835]  ? retint_kernel+0x10/0x10
[  129.165030][ T1835]  ? trace_hardirqs_on+0x55/0x200
[  129.170233][ T1835]  ? v4l2_fh_init+0x279/0x2c0
[  129.175140][ T1835]  end_report+0x43/0x49
[  129.179526][ T1835]  ? v4l2_fh_init+0x279/0x2c0
[  129.184643][ T1835]  __kasan_report.cold+0x55/0x77
[  129.189798][ T1835]  ? v4l2_fh_init+0x279/0x2c0
[  129.194625][ T1835]  kasan_report+0xe/0x20
[  129.198982][ T1835]  v4l2_fh_init+0x279/0x2c0
[  129.203509][ T1835]  v4l2_fh_open+0x88/0xc0
[  129.207843][ T1835]  em28xx_v4l2_open+0x11a/0x570
[  129.212698][ T1835]  v4l2_open+0x20f/0x3d0
[  129.217047][ T1835]  ? v4l2_release+0x390/0x390
[  129.221723][ T1835]  chrdev_open+0x219/0x5c0
[  129.226149][ T1835]  ? cdev_put.part.0+0x50/0x50
[  129.230920][ T1835]  do_dentry_open+0x494/0x1120
[  129.237128][ T1835]  ? cdev_put.part.0+0x50/0x50
[  129.242071][ T1835]  ? chmod_common+0x3c0/0x3c0
[  129.246748][ T1835]  ? inode_permission+0xbe/0x3a0
[  129.251817][ T1835]  path_openat+0x1222/0x32a0
[  129.256734][ T1835]  ? path_mountpoint.isra.0+0x370/0x370
[  129.262281][ T1835]  ? __lock_acquire+0x145e/0x3b60
[  129.267478][ T1835]  do_filp_open+0x192/0x260
[  129.272041][ T1835]  ? may_open_dev+0xf0/0xf0
[  129.276556][ T1835]  ? __alloc_fd+0x46d/0x600
[  129.281075][ T1835]  ? do_raw_spin_lock+0x129/0x290
[  129.287914][ T1835]  ? _raw_spin_unlock+0x1a/0x30
[  129.293109][ T1835]  ? __alloc_fd+0x46d/0x600
[  129.297800][ T1835]  do_sys_openat2+0x54c/0x740
[  129.302794][ T1835]  ? file_open_root+0x3d0/0x3d0
[  129.307646][ T1835]  ? up_read+0x1ab/0x750
[  129.311932][ T1835]  do_sys_open+0xc3/0x140
[  129.316586][ T1835]  ? filp_open+0x70/0x70
[  129.321470][ T1835]  ? trace_hardirqs_off_caller+0x55/0x200
[  129.327729][ T1835]  do_syscall_64+0xb6/0x5a0
[  129.332583][ T1835]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[  129.338593][ T1835] RIP: 0033:0x7f72c6426120
[  129.343114][ T1835] Code: 48 8b 15 1b 4d 2b 00 f7 d8 64 89 02 83 c8 ff c3 90 90 90 90 90 90 90 90 90 90 83 3d d5 a4 2b 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 5e 8c 01 00 48 89 04 24
[  129.363819][ T1835] RSP: 002b:00007fff155c5798 EFLAGS: 00000246 ORIG_RAX: 0000000000000002
[  129.372817][ T1835] RAX: ffffffffffffffda RBX: 00007fff155c58f8 RCX: 00007f72c6426120
[  129.381135][ T1835] RDX: 00007f72c66db138 RSI: 0000000000000000 RDI: 00007fff155c6f1e
[  129.389277][ T1835] RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000
[  129.397674][ T1835] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000400884
[  129.406761][ T1835] R13: 00007fff155c58f0 R14: 0000000000000000 R15: 0000000000000000
[  129.415700][ T1835] Kernel Offset: disabled
[  129.420198][ T1835] Rebooting in 86400 seconds..