Warning: Permanently added '10.128.0.62' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 54.245928][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 54.485937][ T83] usb 1-1: Using ep0 maxpacket: 32 [ 54.606036][ T83] usb 1-1: config 0 has an invalid interface number: 66 but max is 0 [ 54.614982][ T83] usb 1-1: config 0 has no interface number 0 [ 54.621987][ T83] usb 1-1: New USB device found, idVendor=9022, idProduct=d421, bcdDevice=df.b3 [ 54.631976][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 54.642760][ T83] usb 1-1: config 0 descriptor?? [ 54.687912][ T83] dw2102: su3000_identify_state [ 54.693169][ T83] dvb-usb: found a 'TeVii S421 PCI' in warm state. [ 54.699919][ T83] dw2102: su3000_power_ctrl: 1, initialized 0 [ 54.707363][ T83] dvb-usb: bulk message failed: -22 (2/-734629312) [ 54.715527][ T83] dvb-usb: will pass the complete MPEG2 transport stream to the software demuxer. [ 54.736272][ T83] dvbdev: DVB: registering new adapter (TeVii S421 PCI) [ 54.743857][ T83] usb 1-1: media controller created [ 54.749456][ T83] dvb-usb: bulk message failed: -22 (6/-2036041824) [ 54.756510][ T83] dw2102: i2c transfer failed. [ 54.761713][ T83] dvb-usb: bulk message failed: -22 (6/-2036041824) [ 54.768515][ T83] dw2102: i2c transfer failed. [ 54.773874][ T83] dvb-usb: bulk message failed: -22 (6/-2036041824) [ 54.780838][ T83] dw2102: i2c transfer failed. [ 54.785900][ T83] dvb-usb: bulk message failed: -22 (6/-2036041824) [ 54.793044][ T83] dw2102: i2c transfer failed. [ 54.798247][ T83] dvb-usb: bulk message failed: -22 (6/-2036041824) [ 54.805288][ T83] dw2102: i2c transfer failed. [ 54.810230][ T83] dvb-usb: bulk message failed: -22 (6/-2036041824) [ 54.817218][ T83] dw2102: i2c transfer failed. [ 54.822065][ T83] dvb-usb: MAC address: 02:02:02:02:02:02 [ 54.832297][ T83] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered. [ 54.847986][ T83] dvb-usb: bulk message failed: -22 (1/0) [ 54.854012][ T83] dw2102: command 0x51 transfer failed. [ 54.861272][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 54.868024][ T83] dw2102: i2c transfer failed. [ 54.873042][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 54.880578][ T83] dw2102: i2c transfer failed. executing program [ 54.885543][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 54.892513][ T83] dw2102: i2c transfer failed. [ 54.897508][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 54.904712][ T83] dw2102: i2c transfer failed. [ 54.911079][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 54.917969][ T83] dw2102: i2c transfer failed. [ 54.922963][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 54.930172][ T83] dw2102: i2c transfer failed. [ 54.955968][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 54.963318][ T83] dw2102: i2c transfer failed. [ 54.968186][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 54.975413][ T83] dw2102: i2c transfer failed. [ 54.980900][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 54.987820][ T83] dw2102: i2c transfer failed. [ 54.992887][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 54.999826][ T83] dw2102: i2c transfer failed. [ 55.004638][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 55.011449][ T83] dw2102: i2c transfer failed. [ 55.016273][ T83] dvb-usb: bulk message failed: -22 (5/-2036041824) [ 55.023031][ T83] dw2102: i2c transfer failed. [ 55.028654][ T83] ts2020 0-0060: Montage Technology TS2020 successfully identified [ 55.037834][ T83] dw2102: Attached RS2000/TS2020! [ 55.043139][ T83] usb 1-1: DVB: registering adapter 0 frontend 0 (M88RS2000 DVB-S)... [ 55.051680][ T83] dvbdev: dvb_create_media_entity: media entity 'M88RS2000 DVB-S' registered. [ 55.126222][ T83] Registered IR keymap rc-su3000 [ 55.132253][ T83] rc rc0: TeVii S421 PCI as /devices/platform/dummy_hcd.0/usb1/1-1/rc/rc0 [ 55.142908][ T83] input: TeVii S421 PCI as /devices/platform/dummy_hcd.0/usb1/1-1/rc/rc0/input5 [ 55.153717][ T83] dvb-usb: schedule remote query interval to 150 msecs. [ 55.161071][ T83] dw2102: su3000_power_ctrl: 0, initialized 1 [ 55.167364][ T83] dvb-usb: TeVii S421 PCI successfully initialized and connected. [ 55.177078][ T83] usb 1-1: USB disconnect, device number 2 [ 55.183546][ T83] ================================================================== [ 55.191713][ T83] BUG: KASAN: use-after-free in dvb_usb_device_exit+0x19a/0x1a0 [ 55.199509][ T83] Read of size 8 at addr ffff8881d63ba4e8 by task kworker/1:2/83 [ 55.207799][ T83] [ 55.210152][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.4.0-rc1+ #0 [ 55.217512][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.227683][ T83] Workqueue: usb_hub_wq hub_event [ 55.233123][ T83] Call Trace: [ 55.236541][ T83] dump_stack+0xca/0x13e [ 55.240964][ T83] ? dvb_usb_device_exit+0x19a/0x1a0 [ 55.246248][ T83] ? dvb_usb_device_exit+0x19a/0x1a0 [ 55.252754][ T83] print_address_description.constprop.0+0x36/0x50 [ 55.259340][ T83] ? dvb_usb_device_exit+0x19a/0x1a0 [ 55.264621][ T83] ? dvb_usb_device_exit+0x19a/0x1a0 [ 55.269904][ T83] __kasan_report.cold+0x1a/0x33 [ 55.275201][ T83] ? dvb_usb_device_exit+0x19a/0x1a0 [ 55.282213][ T83] kasan_report+0xe/0x20 [ 55.286610][ T83] dvb_usb_device_exit+0x19a/0x1a0 [ 55.291812][ T83] ? dvb_usb_exit+0x290/0x290 [ 55.296621][ T83] ? mark_held_locks+0x9f/0xe0 [ 55.301665][ T83] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 55.307787][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 55.313458][ T83] ? usb_disable_interface+0x7b/0x1a0 [ 55.318917][ T83] ? __pm_runtime_resume+0x111/0x180 [ 55.324299][ T83] usb_unbind_interface+0x1bd/0x8a0 [ 55.329623][ T83] ? usb_autoresume_device+0x60/0x60 [ 55.335497][ T83] device_release_driver_internal+0x42f/0x500 [ 55.341605][ T83] bus_remove_device+0x2dc/0x4a0 [ 55.346880][ T83] device_del+0x420/0xb20 [ 55.351527][ T83] ? __device_link_del+0x2f0/0x2f0 [ 55.356926][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 55.362744][ T83] ? remove_intf_ep_devs+0x13f/0x1d0 [ 55.368844][ T83] usb_disable_device+0x211/0x690 [ 55.373871][ T83] usb_disconnect+0x284/0x8d0 [ 55.379421][ T83] hub_event+0x1454/0x3640 [ 55.384222][ T83] ? find_held_lock+0x2d/0x110 [ 55.389735][ T83] ? mark_held_locks+0xe0/0xe0 [ 55.394806][ T83] ? hub_port_debounce+0x260/0x260 [ 55.400149][ T83] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 55.405807][ T83] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 55.411123][ T83] process_one_work+0x92b/0x1530 [ 55.416174][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 55.421669][ T83] ? do_raw_spin_lock+0x11a/0x280 [ 55.426700][ T83] worker_thread+0x7ab/0xe20 [ 55.431579][ T83] ? process_one_work+0x1530/0x1530 [ 55.437036][ T83] kthread+0x318/0x420 [ 55.441113][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 55.446586][ T83] ret_from_fork+0x24/0x30 [ 55.451030][ T83] [ 55.453351][ T83] Allocated by task 83: [ 55.458816][ T83] save_stack+0x1b/0x80 [ 55.463216][ T83] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 55.468849][ T83] __kmalloc_track_caller+0xfd/0x330 [ 55.475036][ T83] kmemdup+0x23/0x50 [ 55.479350][ T83] dw2102_probe+0x627/0xc40 [ 55.484810][ T83] usb_probe_interface+0x305/0x7a0 [ 55.490806][ T83] really_probe+0x281/0x6d0 [ 55.495483][ T83] driver_probe_device+0x104/0x210 [ 55.500804][ T83] __device_attach_driver+0x1c2/0x220 [ 55.506361][ T83] bus_for_each_drv+0x162/0x1e0 [ 55.511293][ T83] __device_attach+0x217/0x360 [ 55.516152][ T83] bus_probe_device+0x1e4/0x290 [ 55.521496][ T83] device_add+0xae6/0x16f0 [ 55.525975][ T83] usb_set_configuration+0xdf6/0x1670 [ 55.531898][ T83] generic_probe+0x9d/0xd5 [ 55.536516][ T83] usb_probe_device+0x99/0x100 [ 55.543867][ T83] really_probe+0x281/0x6d0 [ 55.548495][ T83] driver_probe_device+0x104/0x210 [ 55.554130][ T83] __device_attach_driver+0x1c2/0x220 [ 55.560231][ T83] bus_for_each_drv+0x162/0x1e0 [ 55.565505][ T83] __device_attach+0x217/0x360 [ 55.570553][ T83] bus_probe_device+0x1e4/0x290 [ 55.575727][ T83] device_add+0xae6/0x16f0 [ 55.580735][ T83] usb_new_device.cold+0x6a4/0xe79 [ 55.586022][ T83] hub_event+0x1b5c/0x3640 [ 55.590601][ T83] process_one_work+0x92b/0x1530 [ 55.595599][ T83] worker_thread+0x96/0xe20 [ 55.600632][ T83] kthread+0x318/0x420 [ 55.606253][ T83] ret_from_fork+0x24/0x30 [ 55.612616][ T83] [ 55.615661][ T83] Freed by task 83: [ 55.620097][ T83] save_stack+0x1b/0x80 [ 55.624601][ T83] __kasan_slab_free+0x130/0x180 [ 55.629692][ T83] kfree+0xe4/0x2f0 [ 55.634045][ T83] dw2102_probe+0x871/0xc40 [ 55.639107][ T83] usb_probe_interface+0x305/0x7a0 [ 55.644666][ T83] really_probe+0x281/0x6d0 [ 55.649541][ T83] driver_probe_device+0x104/0x210 [ 55.655056][ T83] __device_attach_driver+0x1c2/0x220 [ 55.660680][ T83] bus_for_each_drv+0x162/0x1e0 [ 55.666068][ T83] __device_attach+0x217/0x360 [ 55.670939][ T83] bus_probe_device+0x1e4/0x290 [ 55.676206][ T83] device_add+0xae6/0x16f0 [ 55.680697][ T83] usb_set_configuration+0xdf6/0x1670 [ 55.686862][ T83] generic_probe+0x9d/0xd5 [ 55.691785][ T83] usb_probe_device+0x99/0x100 [ 55.696640][ T83] really_probe+0x281/0x6d0 [ 55.701259][ T83] driver_probe_device+0x104/0x210 [ 55.706633][ T83] __device_attach_driver+0x1c2/0x220 [ 55.712284][ T83] bus_for_each_drv+0x162/0x1e0 [ 55.717137][ T83] __device_attach+0x217/0x360 [ 55.722121][ T83] bus_probe_device+0x1e4/0x290 [ 55.727252][ T83] device_add+0xae6/0x16f0 [ 55.731950][ T83] usb_new_device.cold+0x6a4/0xe79 [ 55.737341][ T83] hub_event+0x1b5c/0x3640 [ 55.744861][ T83] process_one_work+0x92b/0x1530 [ 55.749856][ T83] worker_thread+0x96/0xe20 [ 55.756352][ T83] kthread+0x318/0x420 [ 55.760564][ T83] ret_from_fork+0x24/0x30 [ 55.764978][ T83] [ 55.767312][ T83] The buggy address belongs to the object at ffff8881d63ba200 [ 55.767312][ T83] which belongs to the cache kmalloc-4k of size 4096 [ 55.782000][ T83] The buggy address is located 744 bytes inside of [ 55.782000][ T83] 4096-byte region [ffff8881d63ba200, ffff8881d63bb200) [ 55.796141][ T83] The buggy address belongs to the page: [ 55.802358][ T83] page:ffffea000758ee00 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 55.813954][ T83] flags: 0x200000000010200(slab|head) [ 55.819704][ T83] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 55.828613][ T83] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 55.838285][ T83] page dumped because: kasan: bad access detected [ 55.845155][ T83] [ 55.847673][ T83] Memory state around the buggy address: [ 55.853470][ T83] ffff8881d63ba380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.861706][ T83] ffff8881d63ba400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.870148][ T83] >ffff8881d63ba480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.878365][ T83] ^ [ 55.885848][ T83] ffff8881d63ba500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.894073][ T83] ffff8881d63ba580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 55.902368][ T83] ================================================================== [ 55.910461][ T83] Disabling lock debugging due to kernel taint [ 55.916869][ T83] Kernel panic - not syncing: panic_on_warn set ... [ 55.923715][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Tainted: G B 5.4.0-rc1+ #0 [ 55.933418][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 55.943618][ T83] Workqueue: usb_hub_wq hub_event [ 55.948632][ T83] Call Trace: [ 55.952017][ T83] dump_stack+0xca/0x13e [ 55.956792][ T83] panic+0x2a3/0x6da [ 55.961023][ T83] ? add_taint.cold+0x16/0x16 [ 55.965898][ T83] ? retint_kernel+0x10/0x10 [ 55.970658][ T83] ? trace_hardirqs_on+0x55/0x1e0 [ 55.976002][ T83] ? dvb_usb_device_exit+0x19a/0x1a0 [ 55.981613][ T83] end_report+0x43/0x49 [ 55.985932][ T83] ? dvb_usb_device_exit+0x19a/0x1a0 [ 55.991494][ T83] __kasan_report.cold+0xd/0x33 [ 55.996546][ T83] ? dvb_usb_device_exit+0x19a/0x1a0 [ 56.001886][ T83] kasan_report+0xe/0x20 [ 56.006610][ T83] dvb_usb_device_exit+0x19a/0x1a0 [ 56.012046][ T83] ? dvb_usb_exit+0x290/0x290 [ 56.016787][ T83] ? mark_held_locks+0x9f/0xe0 [ 56.021922][ T83] ? _raw_spin_unlock_irqrestore+0x3e/0x50 [ 56.028160][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 56.033552][ T83] ? usb_disable_interface+0x7b/0x1a0 [ 56.039051][ T83] ? __pm_runtime_resume+0x111/0x180 [ 56.044369][ T83] usb_unbind_interface+0x1bd/0x8a0 [ 56.049564][ T83] ? usb_autoresume_device+0x60/0x60 [ 56.054978][ T83] device_release_driver_internal+0x42f/0x500 [ 56.061040][ T83] bus_remove_device+0x2dc/0x4a0 [ 56.065963][ T83] device_del+0x420/0xb20 [ 56.070372][ T83] ? __device_link_del+0x2f0/0x2f0 [ 56.075930][ T83] ? lockdep_hardirqs_on+0x382/0x580 [ 56.081413][ T83] ? remove_intf_ep_devs+0x13f/0x1d0 [ 56.086842][ T83] usb_disable_device+0x211/0x690 [ 56.092093][ T83] usb_disconnect+0x284/0x8d0 [ 56.097282][ T83] hub_event+0x1454/0x3640 [ 56.101720][ T83] ? find_held_lock+0x2d/0x110 [ 56.106827][ T83] ? mark_held_locks+0xe0/0xe0 [ 56.111982][ T83] ? hub_port_debounce+0x260/0x260 [ 56.117226][ T83] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 56.122992][ T83] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 56.128980][ T83] process_one_work+0x92b/0x1530 [ 56.134111][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 56.139485][ T83] ? do_raw_spin_lock+0x11a/0x280 [ 56.144755][ T83] worker_thread+0x7ab/0xe20 [ 56.149516][ T83] ? process_one_work+0x1530/0x1530 [ 56.154870][ T83] kthread+0x318/0x420 [ 56.159304][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 56.165397][ T83] ret_from_fork+0x24/0x30 [ 56.171539][ T83] Kernel Offset: disabled [ 56.177058][ T83] Rebooting in 86400 seconds..