[info] Using makefile-style concurrent boot in runlevel 2. [ 14.442709][ C1] random: crng init done [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.44' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 42.255099][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 42.265095][ T22] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 42.265447][ T1733] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 42.280524][ T5] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 42.285112][ T101] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 42.288045][ T1734] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 42.495066][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 42.525574][ T22] usb 6-1: Using ep0 maxpacket: 8 [ 42.535110][ T101] usb 5-1: Using ep0 maxpacket: 8 [ 42.535242][ T5] usb 4-1: Using ep0 maxpacket: 8 [ 42.545706][ T1733] usb 2-1: Using ep0 maxpacket: 8 [ 42.550777][ T1734] usb 3-1: Using ep0 maxpacket: 8 [ 42.625262][ T12] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 42.633607][ T12] usb 1-1: config 0 has no interface number 0 [ 42.639893][ T12] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 42.645143][ T22] usb 6-1: config 0 has an invalid interface number: 67 but max is 0 [ 42.649037][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 42.657148][ T22] usb 6-1: config 0 has no interface number 0 [ 42.666921][ T12] usb 1-1: config 0 descriptor?? [ 42.674758][ T101] usb 5-1: config 0 has an invalid interface number: 67 but max is 0 [ 42.676863][ T1733] usb 2-1: config 0 has an invalid interface number: 67 but max is 0 [ 42.684289][ T101] usb 5-1: config 0 has no interface number 0 [ 42.692475][ T1733] usb 2-1: config 0 has no interface number 0 [ 42.698736][ T22] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 42.705884][ T1733] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 42.713695][ T22] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 42.722811][ T1733] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 42.730830][ T101] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 42.738959][ T5] usb 4-1: config 0 has an invalid interface number: 67 but max is 0 [ 42.747865][ T101] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 42.753004][ T101] usb 5-1: config 0 descriptor?? [ 42.755974][ T5] usb 4-1: config 0 has no interface number 0 [ 42.756025][ T1734] usb 3-1: config 0 has an invalid interface number: 67 but max is 0 [ 42.756038][ T1734] usb 3-1: config 0 has no interface number 0 [ 42.768594][ T22] usb 6-1: config 0 descriptor?? [ 42.770646][ T12] rio500 1-1:0.67: USB Rio found at address 2 [ 42.796755][ T101] rio500 5-1:0.67: USB Rio found at address 2 [ 42.800552][ T1734] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 42.815569][ T1734] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 42.816348][ T22] rio500 6-1:0.67: Second USB Rio at address 2 refused [ 42.823573][ T5] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 42.839487][ T5] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 42.849251][ T1733] usb 2-1: config 0 descriptor?? [ 42.854579][ T22] rio500: probe of 6-1:0.67 failed with error -16 [ 42.861227][ T1734] usb 3-1: config 0 descriptor?? [ 42.861628][ T5] usb 4-1: config 0 descriptor?? [ 42.886150][ T1733] rio500 2-1:0.67: Second USB Rio at address 2 refused [ 42.893049][ T1733] rio500: probe of 2-1:0.67 failed with error -16 [ 42.901095][ T1734] rio500 3-1:0.67: Second USB Rio at address 2 refused [ 42.916488][ T5] rio500 4-1:0.67: Second USB Rio at address 2 refused [ 42.923418][ T5] rio500: probe of 4-1:0.67 failed with error -16 [ 42.930417][ T1734] rio500: probe of 3-1:0.67 failed with error -16 executing program executing program [ 42.978202][ T5] usb 1-1: USB disconnect, device number 2 [ 42.985865][ T5] rio500 1-1:0.67: USB Rio disconnected. [ 42.997026][ T22] usb 5-1: USB disconnect, device number 2 [ 43.005953][ T22] ================================================================== [ 43.014132][ T22] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 43.022451][ T22] [ 43.024769][ T22] CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.4.0-rc1+ #0 [ 43.032115][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.042188][ T22] Workqueue: usb_hub_wq hub_event [ 43.047203][ T22] Call Trace: [ 43.050478][ T22] dump_stack+0xca/0x13e [ 43.054705][ T22] print_address_description.constprop.0+0x36/0x50 [ 43.061237][ T22] ? disconnect_rio+0x12b/0x1b0 [ 43.066067][ T22] kasan_report_invalid_free+0x61/0xa0 [ 43.072993][ T22] ? disconnect_rio+0x12b/0x1b0 executing program [ 43.077840][ T22] __kasan_slab_free+0x162/0x180 [ 43.082770][ T22] ? disconnect_rio+0x12b/0x1b0 [ 43.086406][ T1734] usb 2-1: USB disconnect, device number 2 [ 43.087610][ T22] kfree+0xe4/0x2f0 [ 43.097200][ T22] disconnect_rio+0x12b/0x1b0 [ 43.101203][ T1733] usb 3-1: USB disconnect, device number 2 [ 43.101881][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 43.112956][ T22] ? usb_autoresume_device+0x60/0x60 [ 43.117842][ T12] usb 4-1: USB disconnect, device number 2 executing program executing program [ 43.118248][ T22] device_release_driver_internal+0x42f/0x500 [ 43.130088][ T22] bus_remove_device+0x2dc/0x4a0 [ 43.135184][ T22] device_del+0x420/0xb20 [ 43.139508][ T22] ? __device_link_del+0x2f0/0x2f0 [ 43.144627][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 43.149916][ T22] ? remove_intf_ep_devs+0x13f/0x1d0 [ 43.155204][ T22] usb_disable_device+0x211/0x690 [ 43.160232][ T22] usb_disconnect+0x284/0x8d0 [ 43.164903][ T22] hub_event+0x1454/0x3640 [ 43.169407][ T22] ? find_held_lock+0x2d/0x110 [ 43.174177][ T22] ? mark_held_locks+0xe0/0xe0 [ 43.178934][ T22] ? hub_port_debounce+0x260/0x260 [ 43.184029][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 43.189575][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 43.194849][ T22] process_one_work+0x92b/0x1530 [ 43.199778][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 43.205141][ T22] ? do_raw_spin_lock+0x11a/0x280 [ 43.210148][ T22] worker_thread+0x96/0xe20 [ 43.214744][ T22] ? process_one_work+0x1530/0x1530 [ 43.219926][ T22] kthread+0x318/0x420 [ 43.223984][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 43.229343][ T22] ret_from_fork+0x24/0x30 [ 43.233749][ T22] [ 43.236065][ T22] Allocated by task 12: [ 43.240200][ T22] save_stack+0x1b/0x80 [ 43.244444][ T22] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 43.250174][ T22] probe_rio+0x135/0x248 [ 43.254402][ T22] usb_probe_interface+0x305/0x7a0 [ 43.259491][ T22] really_probe+0x281/0x6d0 [ 43.263977][ T22] driver_probe_device+0x104/0x210 [ 43.269160][ T22] __device_attach_driver+0x1c2/0x220 [ 43.274516][ T22] bus_for_each_drv+0x162/0x1e0 [ 43.279350][ T22] __device_attach+0x217/0x360 [ 43.284093][ T22] bus_probe_device+0x1e4/0x290 [ 43.288934][ T22] device_add+0xae6/0x16f0 [ 43.293335][ T22] usb_set_configuration+0xdf6/0x1670 [ 43.298687][ T22] generic_probe+0x9d/0xd5 [ 43.303094][ T22] usb_probe_device+0x99/0x100 [ 43.307842][ T22] really_probe+0x281/0x6d0 [ 43.313725][ T22] driver_probe_device+0x104/0x210 [ 43.318821][ T22] __device_attach_driver+0x1c2/0x220 [ 43.324193][ T22] bus_for_each_drv+0x162/0x1e0 [ 43.329022][ T22] __device_attach+0x217/0x360 [ 43.333761][ T22] bus_probe_device+0x1e4/0x290 [ 43.338597][ T22] device_add+0xae6/0x16f0 [ 43.343350][ T22] usb_new_device.cold+0x6a4/0xe79 [ 43.348445][ T22] hub_event+0x1b5c/0x3640 [ 43.352845][ T22] process_one_work+0x92b/0x1530 [ 43.357775][ T22] worker_thread+0x96/0xe20 [ 43.362258][ T22] kthread+0x318/0x420 [ 43.366319][ T22] ret_from_fork+0x24/0x30 [ 43.370734][ T22] [ 43.373055][ T22] Freed by task 5: [ 43.376760][ T22] save_stack+0x1b/0x80 [ 43.380901][ T22] __kasan_slab_free+0x130/0x180 [ 43.385828][ T22] kfree+0xe4/0x2f0 [ 43.389616][ T22] disconnect_rio+0x12b/0x1b0 [ 43.394275][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 43.399452][ T22] device_release_driver_internal+0x42f/0x500 [ 43.406107][ T22] bus_remove_device+0x2dc/0x4a0 [ 43.411021][ T22] device_del+0x420/0xb20 [ 43.415327][ T22] usb_disable_device+0x211/0x690 [ 43.420344][ T22] usb_disconnect+0x284/0x8d0 [ 43.425000][ T22] hub_event+0x1454/0x3640 [ 43.429401][ T22] process_one_work+0x92b/0x1530 [ 43.434317][ T22] worker_thread+0x96/0xe20 [ 43.438794][ T22] kthread+0x318/0x420 [ 43.442857][ T22] ret_from_fork+0x24/0x30 [ 43.447261][ T22] [ 43.449585][ T22] The buggy address belongs to the object at ffff8881d2c88000 [ 43.449585][ T22] which belongs to the cache kmalloc-4k of size 4096 [ 43.463626][ T22] The buggy address is located 0 bytes inside of [ 43.463626][ T22] 4096-byte region [ffff8881d2c88000, ffff8881d2c89000) [ 43.476785][ T22] The buggy address belongs to the page: [ 43.482402][ T22] page:ffffea00074b2200 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 43.493320][ T22] flags: 0x200000000010200(slab|head) [ 43.498676][ T22] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 43.507239][ T22] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 43.515806][ T22] page dumped because: kasan: bad access detected [ 43.522223][ T22] [ 43.524527][ T22] Memory state around the buggy address: [ 43.530134][ T22] ffff8881d2c87f00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.538180][ T22] ffff8881d2c87f80: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 43.546232][ T22] >ffff8881d2c88000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.554275][ T22] ^ [ 43.558322][ T22] ffff8881d2c88080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.566359][ T22] ffff8881d2c88100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program [ 43.574392][ T22] ================================================================== [ 43.582437][ T22] Disabling lock debugging due to kernel taint [ 43.588761][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 43.593147][ T1737] usb 6-1: USB disconnect, device number 2 [ 43.595346][ T22] CPU: 1 PID: 22 Comm: kworker/1:1 Tainted: G B 5.4.0-rc1+ #0 [ 43.595357][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.620025][ T22] Workqueue: usb_hub_wq hub_event [ 43.625027][ T22] Call Trace: [ 43.628296][ T22] dump_stack+0xca/0x13e [ 43.632519][ T22] panic+0x2a3/0x6da [ 43.636391][ T22] ? add_taint.cold+0x16/0x16 [ 43.641043][ T22] ? disconnect_rio+0x12b/0x1b0 [ 43.645878][ T22] ? trace_hardirqs_on+0x55/0x1e0 [ 43.650878][ T22] ? disconnect_rio+0x12b/0x1b0 [ 43.655704][ T22] end_report+0x43/0x49 [ 43.659845][ T22] kasan_report_invalid_free+0x7d/0xa0 [ 43.665293][ T22] ? disconnect_rio+0x12b/0x1b0 [ 43.670127][ T22] __kasan_slab_free+0x162/0x180 [ 43.675038][ T22] ? disconnect_rio+0x12b/0x1b0 [ 43.679867][ T22] kfree+0xe4/0x2f0 [ 43.683651][ T22] disconnect_rio+0x12b/0x1b0 [ 43.688310][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 43.693493][ T22] ? usb_autoresume_device+0x60/0x60 [ 43.698755][ T22] device_release_driver_internal+0x42f/0x500 [ 43.704808][ T22] bus_remove_device+0x2dc/0x4a0 [ 43.709741][ T22] device_del+0x420/0xb20 [ 43.714054][ T22] ? __device_link_del+0x2f0/0x2f0 [ 43.719141][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 43.724402][ T22] ? remove_intf_ep_devs+0x13f/0x1d0 [ 43.729671][ T22] usb_disable_device+0x211/0x690 [ 43.734672][ T22] usb_disconnect+0x284/0x8d0 [ 43.739323][ T22] hub_event+0x1454/0x3640 [ 43.743716][ T22] ? find_held_lock+0x2d/0x110 [ 43.748454][ T22] ? mark_held_locks+0xe0/0xe0 [ 43.753201][ T22] ? hub_port_debounce+0x260/0x260 [ 43.758288][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 43.763808][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 43.769088][ T22] process_one_work+0x92b/0x1530 [ 43.774276][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 43.779619][ T22] ? do_raw_spin_lock+0x11a/0x280 [ 43.784616][ T22] worker_thread+0x96/0xe20 [ 43.789091][ T22] ? process_one_work+0x1530/0x1530 [ 43.794262][ T22] kthread+0x318/0x420 [ 43.798306][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 43.803654][ T22] ret_from_fork+0x24/0x30 [ 43.808811][ T22] Kernel Offset: disabled [ 43.813123][ T22] Rebooting in 86400 seconds..