[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 14.454410][ C1] random: crng init done [....] 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 '10.128.10.59' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 442.456567][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 442.456574][ T12] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 442.466897][ T17] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 442.479812][ T1733] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 442.486418][ T102] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 442.487456][ T1735] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 442.696475][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 442.717026][ T12] usb 6-1: Using ep0 maxpacket: 8 [ 442.726889][ T102] usb 2-1: Using ep0 maxpacket: 8 [ 442.736495][ T17] usb 4-1: Using ep0 maxpacket: 8 [ 442.741699][ T1733] usb 5-1: Using ep0 maxpacket: 8 [ 442.746772][ T1735] usb 3-1: Using ep0 maxpacket: 8 [ 442.836528][ T12] usb 6-1: config 0 has an invalid interface number: 67 but max is 0 [ 442.844815][ T12] usb 6-1: config 0 has no interface number 0 [ 442.846839][ T83] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 442.851246][ T102] usb 2-1: config 0 has an invalid interface number: 67 but max is 0 [ 442.859102][ T83] usb 1-1: config 0 has no interface number 0 [ 442.867132][ T102] usb 2-1: config 0 has no interface number 0 [ 442.867616][ T12] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 442.873426][ T17] usb 4-1: config 0 has an invalid interface number: 67 but max is 0 [ 442.879282][ T12] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 442.879571][ T102] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 442.888375][ T17] usb 4-1: config 0 has no interface number 0 [ 442.896422][ T102] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 442.904842][ T83] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 442.920741][ T12] usb 6-1: config 0 descriptor?? [ 442.927739][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 442.945774][ T102] usb 2-1: config 0 descriptor?? [ 442.949842][ T1733] usb 5-1: config 0 has an invalid interface number: 67 but max is 0 [ 442.962978][ T1733] usb 5-1: config 0 has no interface number 0 [ 442.969120][ T1735] usb 3-1: config 0 has an invalid interface number: 67 but max is 0 [ 442.977231][ T1735] usb 3-1: config 0 has no interface number 0 [ 442.983311][ T17] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 442.992542][ T17] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 442.999430][ T102] rio500 2-1:0.67: USB Rio found at address 2 [ 443.000608][ T1735] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 443.014093][ T12] rio500 6-1:0.67: USB Rio found at address 2 [ 443.015657][ T1735] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 443.015899][ T1733] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 443.038849][ T1733] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 443.050870][ T1735] usb 3-1: config 0 descriptor?? [ 443.056241][ T17] usb 4-1: config 0 descriptor?? [ 443.062292][ T83] usb 1-1: config 0 descriptor?? [ 443.068357][ T1733] usb 5-1: config 0 descriptor?? [ 443.088122][ T1735] rio500 3-1:0.67: Second USB Rio at address 2 refused [ 443.095160][ T1735] rio500: probe of 3-1:0.67 failed with error -16 [ 443.103079][ T17] rio500 4-1:0.67: Second USB Rio at address 2 refused [ 443.111366][ T83] rio500 1-1:0.67: Second USB Rio at address 2 refused [ 443.119480][ T1733] rio500 5-1:0.67: Second USB Rio at address 2 refused [ 443.126463][ T83] rio500: probe of 1-1:0.67 failed with error -16 [ 443.136463][ T17] rio500: probe of 4-1:0.67 failed with error -16 [ 443.143972][ T1733] rio500: probe of 5-1:0.67 failed with error -16 executing program executing program [ 443.211800][ T12] usb 2-1: USB disconnect, device number 2 [ 443.212117][ T1733] usb 6-1: USB disconnect, device number 2 [ 443.227270][ T1733] rio500 6-1:0.67: USB Rio disconnected. [ 443.236407][ T12] ================================================================== [ 443.244783][ T12] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 443.253089][ T12] [ 443.255423][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0+ #0 [ 443.262418][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 443.272698][ T12] Workqueue: usb_hub_wq hub_event [ 443.277703][ T12] Call Trace: [ 443.281013][ T12] dump_stack+0xca/0x13e [ 443.285275][ T12] print_address_description+0x6a/0x32c [ 443.290803][ T12] ? disconnect_rio+0x12b/0x1b0 [ 443.295633][ T12] kasan_report_invalid_free+0x61/0xa0 [ 443.301065][ T12] ? disconnect_rio+0x12b/0x1b0 [ 443.305891][ T12] __kasan_slab_free+0x162/0x180 [ 443.310812][ T12] ? disconnect_rio+0x12b/0x1b0 [ 443.315639][ T12] kfree+0xe4/0x2f0 [ 443.319429][ T12] disconnect_rio+0x12b/0x1b0 [ 443.324112][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 443.329288][ T12] ? usb_autoresume_device+0x60/0x60 [ 443.334620][ T12] device_release_driver_internal+0x42f/0x500 [ 443.340670][ T12] bus_remove_device+0x2dc/0x4a0 [ 443.345586][ T12] device_del+0x420/0xb10 [ 443.349893][ T12] ? __device_links_no_driver+0x240/0x240 [ 443.355592][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 443.360857][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 443.366125][ T12] usb_disable_device+0x211/0x690 [ 443.371129][ T12] usb_disconnect+0x284/0x8d0 [ 443.375801][ T12] hub_event+0x1454/0x3640 [ 443.380200][ T12] ? find_held_lock+0x2d/0x110 [ 443.384940][ T12] ? mark_held_locks+0xe0/0xe0 [ 443.389680][ T12] ? hub_port_debounce+0x260/0x260 [ 443.394828][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 443.400352][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 443.405631][ T12] process_one_work+0x92b/0x1530 [ 443.410552][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 443.415914][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 443.420913][ T12] worker_thread+0x96/0xe20 [ 443.425759][ T12] ? process_one_work+0x1530/0x1530 [ 443.430940][ T12] kthread+0x318/0x420 [ 443.434998][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 443.440399][ T12] ret_from_fork+0x24/0x30 [ 443.444835][ T12] [ 443.447170][ T12] Allocated by task 12: [ 443.451307][ T12] save_stack+0x1b/0x80 [ 443.455437][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 443.461047][ T12] probe_rio+0x135/0x248 [ 443.465269][ T12] usb_probe_interface+0x305/0x7a0 [ 443.470357][ T12] really_probe+0x281/0x6d0 [ 443.474834][ T12] driver_probe_device+0x101/0x1b0 [ 443.479917][ T12] __device_attach_driver+0x1c2/0x220 [ 443.485262][ T12] bus_for_each_drv+0x162/0x1e0 [ 443.490086][ T12] __device_attach+0x217/0x360 [ 443.494824][ T12] bus_probe_device+0x1e4/0x290 [ 443.499652][ T12] device_add+0xae6/0x16f0 [ 443.504066][ T12] usb_set_configuration+0xdf6/0x1670 [ 443.509469][ T12] generic_probe+0x9d/0xd5 [ 443.513864][ T12] usb_probe_device+0x99/0x100 [ 443.518606][ T12] really_probe+0x281/0x6d0 [ 443.523086][ T12] driver_probe_device+0x101/0x1b0 [ 443.528179][ T12] __device_attach_driver+0x1c2/0x220 [ 443.533537][ T12] bus_for_each_drv+0x162/0x1e0 [ 443.538379][ T12] __device_attach+0x217/0x360 [ 443.543123][ T12] bus_probe_device+0x1e4/0x290 [ 443.547966][ T12] device_add+0xae6/0x16f0 [ 443.552369][ T12] usb_new_device.cold+0x6a4/0xe79 [ 443.557463][ T12] hub_event+0x1b5c/0x3640 [ 443.561858][ T12] process_one_work+0x92b/0x1530 [ 443.566775][ T12] worker_thread+0x96/0xe20 [ 443.571259][ T12] kthread+0x318/0x420 [ 443.575336][ T12] ret_from_fork+0x24/0x30 [ 443.579735][ T12] [ 443.582048][ T12] Freed by task 1733: [ 443.586029][ T12] save_stack+0x1b/0x80 [ 443.590174][ T12] __kasan_slab_free+0x130/0x180 [ 443.595160][ T12] kfree+0xe4/0x2f0 [ 443.598952][ T12] disconnect_rio+0x12b/0x1b0 [ 443.603649][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 443.608919][ T12] device_release_driver_internal+0x42f/0x500 [ 443.614974][ T12] bus_remove_device+0x2dc/0x4a0 [ 443.619896][ T12] device_del+0x420/0xb10 [ 443.624238][ T12] usb_disable_device+0x211/0x690 [ 443.629238][ T12] usb_disconnect+0x284/0x8d0 [ 443.633893][ T12] hub_event+0x1454/0x3640 [ 443.638290][ T12] process_one_work+0x92b/0x1530 [ 443.643202][ T12] worker_thread+0x96/0xe20 [ 443.647680][ T12] kthread+0x318/0x420 [ 443.651724][ T12] ret_from_fork+0x24/0x30 [ 443.656109][ T12] [ 443.658417][ T12] The buggy address belongs to the object at ffff8881d2869100 [ 443.658417][ T12] which belongs to the cache kmalloc-4k of size 4096 [ 443.672445][ T12] The buggy address is located 0 bytes inside of [ 443.672445][ T12] 4096-byte region [ffff8881d2869100, ffff8881d286a100) [ 443.685602][ T12] The buggy address belongs to the page: [ 443.691214][ T12] page:ffffea00074a1a00 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 443.702162][ T12] flags: 0x200000000010200(slab|head) [ 443.708122][ T12] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 443.716683][ T12] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 443.725238][ T12] page dumped because: kasan: bad access detected [ 443.731621][ T12] [ 443.733929][ T12] Memory state around the buggy address: [ 443.739649][ T12] ffff8881d2869000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 443.747685][ T12] ffff8881d2869080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 443.755725][ T12] >ffff8881d2869100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 443.763758][ T12] ^ [ 443.767817][ T12] ffff8881d2869180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 443.775856][ T12] ffff8881d2869200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 443.783890][ T12] ================================================================== [ 443.791924][ T12] Disabling lock debugging due to kernel taint [ 443.798184][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 443.804792][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.3.0+ #0 [ 443.805125][ T1735] usb 5-1: USB disconnect, device number 2 [ 443.813188][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 443.813206][ T12] Workqueue: usb_hub_wq hub_event [ 443.813213][ T12] Call Trace: [ 443.813230][ T12] dump_stack+0xca/0x13e [ 443.813242][ T12] panic+0x2a3/0x6da [ 443.813250][ T12] ? add_taint.cold+0x16/0x16 [ 443.813263][ T12] ? disconnect_rio+0x12b/0x1b0 [ 443.813365][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 443.813380][ T12] ? disconnect_rio+0x12b/0x1b0 [ 443.819260][ T17] usb 4-1: USB disconnect, device number 2 [ 443.829204][ T12] end_report+0x43/0x49 [ 443.829216][ T12] kasan_report_invalid_free+0x7d/0xa0 [ 443.829226][ T12] ? disconnect_rio+0x12b/0x1b0 [ 443.829239][ T12] __kasan_slab_free+0x162/0x180 [ 443.834292][ T1738] usb 3-1: USB disconnect, device number 2 [ 443.837500][ T12] ? disconnect_rio+0x12b/0x1b0 [ 443.837508][ T12] kfree+0xe4/0x2f0 [ 443.837516][ T12] disconnect_rio+0x12b/0x1b0 [ 443.837530][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 443.837541][ T12] ? usb_autoresume_device+0x60/0x60 [ 443.837555][ T12] device_release_driver_internal+0x42f/0x500 [ 443.837568][ T12] bus_remove_device+0x2dc/0x4a0 [ 443.841819][ T83] usb 1-1: USB disconnect, device number 2 [ 443.845652][ T12] device_del+0x420/0xb10 [ 443.845667][ T12] ? __device_links_no_driver+0x240/0x240 [ 443.946169][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 443.951437][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 443.956716][ T12] usb_disable_device+0x211/0x690 [ 443.961720][ T12] usb_disconnect+0x284/0x8d0 [ 443.966375][ T12] hub_event+0x1454/0x3640 [ 443.970792][ T12] ? find_held_lock+0x2d/0x110 [ 443.975534][ T12] ? mark_held_locks+0xe0/0xe0 [ 443.980363][ T12] ? hub_port_debounce+0x260/0x260 [ 443.985454][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 443.990975][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 443.996238][ T12] process_one_work+0x92b/0x1530 [ 444.001153][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 444.006499][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 444.011498][ T12] worker_thread+0x96/0xe20 [ 444.015985][ T12] ? process_one_work+0x1530/0x1530 [ 444.021157][ T12] kthread+0x318/0x420 [ 444.025206][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 444.030557][ T12] ret_from_fork+0x24/0x30 [ 444.035686][ T12] Kernel Offset: disabled [ 444.040005][ T12] Rebooting in 86400 seconds..