[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[ 14.418806][ C1] random: crng init done [?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 '10.128.1.62' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 35.260523][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 35.260531][ T83] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 35.280551][ T22] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 35.281134][ T5] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 35.288086][ T1733] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 35.303216][ T17] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 35.510503][ T12] usb 1-1: Using ep0 maxpacket: 8 [ 35.510529][ T83] usb 6-1: Using ep0 maxpacket: 8 [ 35.530545][ T5] usb 4-1: Using ep0 maxpacket: 8 [ 35.550507][ T22] usb 3-1: Using ep0 maxpacket: 8 [ 35.555683][ T17] usb 2-1: Using ep0 maxpacket: 8 [ 35.560832][ T1733] usb 5-1: Using ep0 maxpacket: 8 [ 35.630606][ T12] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 35.638828][ T12] usb 1-1: config 0 has no interface number 0 [ 35.641106][ T83] usb 6-1: config 0 has an invalid interface number: 67 but max is 0 [ 35.645271][ T12] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 35.653080][ T83] usb 6-1: config 0 has no interface number 0 [ 35.662099][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 35.662177][ T5] usb 4-1: config 0 has an invalid interface number: 67 but max is 0 [ 35.668466][ T83] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 35.676207][ T5] usb 4-1: config 0 has no interface number 0 [ 35.676557][ T5] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 35.684461][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 35.693430][ T5] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 35.698432][ T12] usb 1-1: config 0 descriptor?? [ 35.699827][ T22] usb 3-1: config 0 has an invalid interface number: 67 but max is 0 [ 35.713988][ T5] usb 4-1: config 0 descriptor?? [ 35.717395][ T22] usb 3-1: config 0 has no interface number 0 [ 35.749396][ T1733] usb 5-1: config 0 has an invalid interface number: 67 but max is 0 [ 35.752273][ T12] rio500 1-1:0.67: USB Rio found at address 2 [ 35.757533][ T1733] usb 5-1: config 0 has no interface number 0 [ 35.769682][ T17] usb 2-1: config 0 has an invalid interface number: 67 but max is 0 [ 35.770846][ T5] rio500 4-1:0.67: USB Rio found at address 2 [ 35.777796][ T17] usb 2-1: config 0 has no interface number 0 [ 35.799520][ T1733] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 35.808609][ T1733] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 35.817171][ T17] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 35.826241][ T17] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 35.834571][ T83] usb 6-1: config 0 descriptor?? [ 35.840223][ T1733] usb 5-1: config 0 descriptor?? [ 35.846456][ T17] usb 2-1: config 0 descriptor?? [ 35.851789][ T22] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 35.860979][ T22] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 35.870172][ T22] usb 3-1: config 0 descriptor?? [ 35.876537][ T83] rio500 6-1:0.67: Second USB Rio at address 2 refused [ 35.884776][ T1733] rio500 5-1:0.67: Second USB Rio at address 2 refused [ 35.893047][ T17] rio500 2-1:0.67: Second USB Rio at address 2 refused [ 35.900038][ T17] rio500: probe of 2-1:0.67 failed with error -16 [ 35.906720][ T1733] rio500: probe of 5-1:0.67 failed with error -16 [ 35.913242][ T83] rio500: probe of 6-1:0.67 failed with error -16 executing program executing program [ 35.941879][ T22] rio500 3-1:0.67: Second USB Rio at address 2 refused [ 35.949621][ T22] rio500: probe of 3-1:0.67 failed with error -16 [ 35.953204][ T5] usb 1-1: USB disconnect, device number 2 [ 35.969733][ T5] rio500 1-1:0.67: USB Rio disconnected. [ 35.982015][ T12] usb 4-1: USB disconnect, device number 2 [ 35.992472][ T12] ================================================================== [ 36.000629][ T12] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 36.008940][ T12] [ 36.011268][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0+ #0 [ 36.018260][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.028300][ T12] Workqueue: usb_hub_wq hub_event [ 36.033305][ T12] Call Trace: [ 36.036684][ T12] dump_stack+0xca/0x13e [ 36.040925][ T12] print_address_description+0x6a/0x32c [ 36.046457][ T12] ? disconnect_rio+0x12b/0x1b0 [ 36.051286][ T12] kasan_report_invalid_free+0x61/0xa0 [ 36.056730][ T12] ? disconnect_rio+0x12b/0x1b0 [ 36.061687][ T12] __kasan_slab_free+0x162/0x180 [ 36.066610][ T12] ? disconnect_rio+0x12b/0x1b0 [ 36.071438][ T12] kfree+0xe4/0x2f0 [ 36.075233][ T12] disconnect_rio+0x12b/0x1b0 [ 36.079886][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 36.085063][ T12] ? usb_autoresume_device+0x60/0x60 [ 36.090330][ T12] device_release_driver_internal+0x42f/0x500 [ 36.096373][ T12] bus_remove_device+0x2dc/0x4a0 [ 36.101285][ T12] device_del+0x420/0xb10 [ 36.105594][ T12] ? __device_links_no_driver+0x240/0x240 [ 36.111291][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 36.116548][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 36.121829][ T12] usb_disable_device+0x211/0x690 [ 36.126830][ T12] usb_disconnect+0x284/0x8d0 [ 36.131485][ T12] hub_event+0x1454/0x3640 [ 36.135893][ T12] ? find_held_lock+0x2d/0x110 executing program [ 36.140646][ T12] ? mark_held_locks+0xe0/0xe0 [ 36.143224][ T22] usb 3-1: USB disconnect, device number 2 [ 36.145404][ T12] ? hub_port_debounce+0x260/0x260 [ 36.145427][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 36.145439][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 36.145452][ T12] process_one_work+0x92b/0x1530 [ 36.145467][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 36.177392][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 36.182400][ T12] worker_thread+0x96/0xe20 [ 36.186882][ T12] ? process_one_work+0x1530/0x1530 [ 36.192062][ T12] kthread+0x318/0x420 [ 36.196114][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 36.201571][ T12] ret_from_fork+0x24/0x30 [ 36.205989][ T12] [ 36.208313][ T12] Allocated by task 5: [ 36.212365][ T12] save_stack+0x1b/0x80 [ 36.216690][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 36.222305][ T12] probe_rio+0x135/0x248 [ 36.226538][ T12] usb_probe_interface+0x305/0x7a0 [ 36.231640][ T12] really_probe+0x281/0x6d0 [ 36.236116][ T12] driver_probe_device+0x101/0x1b0 [ 36.241707][ T12] __device_attach_driver+0x1c2/0x220 [ 36.247053][ T12] bus_for_each_drv+0x162/0x1e0 [ 36.251880][ T12] __device_attach+0x217/0x360 [ 36.256636][ T12] bus_probe_device+0x1e4/0x290 [ 36.261466][ T12] device_add+0xae6/0x16f0 [ 36.265864][ T12] usb_set_configuration+0xdf6/0x1670 [ 36.271220][ T12] generic_probe+0x9d/0xd5 [ 36.275642][ T12] usb_probe_device+0x99/0x100 [ 36.280420][ T12] really_probe+0x281/0x6d0 [ 36.284921][ T12] driver_probe_device+0x101/0x1b0 [ 36.290023][ T12] __device_attach_driver+0x1c2/0x220 [ 36.295553][ T12] bus_for_each_drv+0x162/0x1e0 [ 36.300383][ T12] __device_attach+0x217/0x360 [ 36.305123][ T12] bus_probe_device+0x1e4/0x290 [ 36.309955][ T12] device_add+0xae6/0x16f0 [ 36.314351][ T12] usb_new_device.cold+0x6a4/0xe79 [ 36.319439][ T12] hub_event+0x1b5c/0x3640 [ 36.323869][ T12] process_one_work+0x92b/0x1530 [ 36.328821][ T12] worker_thread+0x96/0xe20 [ 36.333307][ T12] kthread+0x318/0x420 [ 36.337364][ T12] ret_from_fork+0x24/0x30 [ 36.341802][ T12] [ 36.344109][ T12] Freed by task 5: [ 36.347808][ T12] save_stack+0x1b/0x80 [ 36.351939][ T12] __kasan_slab_free+0x130/0x180 [ 36.356850][ T12] kfree+0xe4/0x2f0 [ 36.360644][ T12] disconnect_rio+0x12b/0x1b0 [ 36.365306][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 36.370483][ T12] device_release_driver_internal+0x42f/0x500 [ 36.376700][ T12] bus_remove_device+0x2dc/0x4a0 [ 36.381617][ T12] device_del+0x420/0xb10 [ 36.386365][ T12] usb_disable_device+0x211/0x690 [ 36.391361][ T12] usb_disconnect+0x284/0x8d0 [ 36.396010][ T12] hub_event+0x1454/0x3640 [ 36.400403][ T12] process_one_work+0x92b/0x1530 [ 36.405464][ T12] worker_thread+0x96/0xe20 [ 36.409953][ T12] kthread+0x318/0x420 [ 36.414054][ T12] ret_from_fork+0x24/0x30 [ 36.418442][ T12] [ 36.420791][ T12] The buggy address belongs to the object at ffff8881d317d500 [ 36.420791][ T12] which belongs to the cache kmalloc-4k of size 4096 [ 36.434820][ T12] The buggy address is located 0 bytes inside of [ 36.434820][ T12] 4096-byte region [ffff8881d317d500, ffff8881d317e500) [ 36.447977][ T12] The buggy address belongs to the page: [ 36.453588][ T12] page:ffffea00074c5e00 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 36.464502][ T12] flags: 0x200000000010200(slab|head) [ 36.469866][ T12] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 36.478495][ T12] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 36.487123][ T12] page dumped because: kasan: bad access detected [ 36.493534][ T12] [ 36.495841][ T12] Memory state around the buggy address: [ 36.501450][ T12] ffff8881d317d400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.509488][ T12] ffff8881d317d480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.511333][ T22] usb 3-1: new high-speed USB device number 3 using dummy_hcd [ 36.517875][ T12] >ffff8881d317d500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.517880][ T12] ^ executing program executing program executing program [ 36.517888][ T12] ffff8881d317d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.517897][ T12] ffff8881d317d600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.517902][ T12] ================================================================== [ 36.517906][ T12] Disabling lock debugging due to kernel taint [ 36.517996][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 36.534940][ T1733] usb 5-1: USB disconnect, device number 2 [ 36.537462][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.3.0+ #0 [ 36.537468][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 36.537484][ T12] Workqueue: usb_hub_wq hub_event [ 36.545686][ T83] usb 6-1: USB disconnect, device number 2 [ 36.553550][ T12] Call Trace: [ 36.553566][ T12] dump_stack+0xca/0x13e [ 36.553577][ T12] panic+0x2a3/0x6da [ 36.553585][ T12] ? add_taint.cold+0x16/0x16 [ 36.553601][ T12] ? disconnect_rio+0x12b/0x1b0 [ 36.562059][ T17] usb 2-1: USB disconnect, device number 2 [ 36.567787][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 36.567797][ T12] ? disconnect_rio+0x12b/0x1b0 [ 36.567812][ T12] end_report+0x43/0x49 [ 36.650925][ T12] kasan_report_invalid_free+0x7d/0xa0 [ 36.656371][ T12] ? disconnect_rio+0x12b/0x1b0 [ 36.661237][ T12] __kasan_slab_free+0x162/0x180 [ 36.666159][ T12] ? disconnect_rio+0x12b/0x1b0 [ 36.670999][ T12] kfree+0xe4/0x2f0 [ 36.674781][ T12] disconnect_rio+0x12b/0x1b0 [ 36.679438][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 36.684613][ T12] ? usb_autoresume_device+0x60/0x60 [ 36.689875][ T12] device_release_driver_internal+0x42f/0x500 [ 36.695939][ T12] bus_remove_device+0x2dc/0x4a0 [ 36.700879][ T12] device_del+0x420/0xb10 [ 36.705192][ T12] ? __device_links_no_driver+0x240/0x240 [ 36.710899][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 36.716234][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 36.721500][ T12] usb_disable_device+0x211/0x690 [ 36.726507][ T12] usb_disconnect+0x284/0x8d0 [ 36.731164][ T12] hub_event+0x1454/0x3640 [ 36.735557][ T12] ? find_held_lock+0x2d/0x110 [ 36.740309][ T12] ? mark_held_locks+0xe0/0xe0 [ 36.745059][ T12] ? hub_port_debounce+0x260/0x260 [ 36.750153][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 36.755676][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 36.760944][ T12] process_one_work+0x92b/0x1530 [ 36.765861][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 36.770717][ T22] usb 3-1: Using ep0 maxpacket: 8 [ 36.771213][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 36.771225][ T12] worker_thread+0x96/0xe20 [ 36.771236][ T12] ? process_one_work+0x1530/0x1530 [ 36.771249][ T12] kthread+0x318/0x420 [ 36.795073][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 36.800430][ T12] ret_from_fork+0x24/0x30 [ 36.805428][ T12] Kernel Offset: disabled [ 36.809742][ T12] Rebooting in 86400 seconds..