[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 14.545250][ 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 '10.128.0.209' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 63.853926][ T12] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 63.853934][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 63.864044][ T102] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 63.869305][ T17] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 63.877287][ T5] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 63.884147][ T22] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 64.093938][ T12] usb 6-1: Using ep0 maxpacket: 8 [ 64.123872][ T102] usb 5-1: Using ep0 maxpacket: 8 [ 64.129055][ T5] usb 3-1: Using ep0 maxpacket: 8 [ 64.143866][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 64.149114][ T17] usb 4-1: Using ep0 maxpacket: 8 [ 64.154467][ T22] usb 2-1: Using ep0 maxpacket: 8 [ 64.214103][ T12] usb 6-1: config 0 has an invalid interface number: 67 but max is 0 [ 64.222432][ T12] usb 6-1: config 0 has no interface number 0 [ 64.228752][ T12] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 64.237842][ T12] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.246022][ T102] usb 5-1: config 0 has an invalid interface number: 67 but max is 0 [ 64.254117][ T102] usb 5-1: config 0 has no interface number 0 [ 64.260880][ T102] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 64.270014][ T102] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.278684][ T12] usb 6-1: config 0 descriptor?? [ 64.283914][ T5] usb 3-1: config 0 has an invalid interface number: 67 but max is 0 [ 64.284384][ T17] usb 4-1: config 0 has an invalid interface number: 67 but max is 0 [ 64.291994][ T5] usb 3-1: config 0 has no interface number 0 [ 64.292034][ T5] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 64.292047][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.294317][ T5] usb 3-1: config 0 descriptor?? [ 64.300266][ T17] usb 4-1: config 0 has no interface number 0 [ 64.306982][ T102] usb 5-1: config 0 descriptor?? [ 64.320023][ T83] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 64.325527][ T12] rio500 6-1:0.67: USB Rio found at address 2 [ 64.328547][ T83] usb 1-1: config 0 has no interface number 0 [ 64.359946][ T22] usb 2-1: config 0 has an invalid interface number: 67 but max is 0 [ 64.368090][ T22] usb 2-1: config 0 has no interface number 0 [ 64.374469][ T22] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 64.375223][ T5] rio500 3-1:0.67: Second USB Rio at address 2 refused [ 64.383490][ T22] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.391593][ T102] rio500 5-1:0.67: Second USB Rio at address 2 refused [ 64.398937][ T17] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 64.413082][ T102] rio500: probe of 5-1:0.67 failed with error -16 [ 64.414802][ T17] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.415384][ T83] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 64.422030][ T5] rio500: probe of 3-1:0.67 failed with error -16 [ 64.429470][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.429766][ T22] usb 2-1: config 0 descriptor?? [ 64.458816][ T17] usb 4-1: config 0 descriptor?? [ 64.465325][ T83] usb 1-1: config 0 descriptor?? executing program [ 64.525251][ T17] rio500 4-1:0.67: Second USB Rio at address 2 refused [ 64.525787][ T5] usb 6-1: USB disconnect, device number 2 [ 64.532199][ T17] rio500: probe of 4-1:0.67 failed with error -16 [ 64.550681][ T83] rio500 1-1:0.67: Second USB Rio at address 2 refused [ 64.557875][ T22] rio500 2-1:0.67: Second USB Rio at address 2 refused [ 64.566500][ T5] rio500 6-1:0.67: USB Rio disconnected. executing program executing program [ 64.569531][ T83] rio500: probe of 1-1:0.67 failed with error -16 [ 64.580643][ T22] rio500: probe of 2-1:0.67 failed with error -16 [ 64.600158][ T83] usb 5-1: USB disconnect, device number 2 [ 64.614937][ T102] usb 3-1: USB disconnect, device number 2 executing program executing program executing program [ 64.725347][ T12] usb 2-1: USB disconnect, device number 2 [ 64.746152][ T22] usb 4-1: USB disconnect, device number 2 [ 64.746717][ T1737] usb 1-1: USB disconnect, device number 2 [ 64.953886][ T5] usb 6-1: new high-speed USB device number 3 using dummy_hcd [ 64.973920][ T83] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 64.973992][ T102] usb 3-1: new high-speed USB device number 3 using dummy_hcd [ 65.083887][ T12] usb 2-1: new high-speed USB device number 3 using dummy_hcd [ 65.103994][ T1737] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 65.163947][ T22] usb 4-1: new high-speed USB device number 3 using dummy_hcd [ 65.193861][ T5] usb 6-1: Using ep0 maxpacket: 8 [ 65.223871][ T83] usb 5-1: Using ep0 maxpacket: 8 [ 65.233963][ T102] usb 3-1: Using ep0 maxpacket: 8 [ 65.314045][ T5] usb 6-1: config 0 has an invalid interface number: 67 but max is 0 [ 65.322187][ T5] usb 6-1: config 0 has no interface number 0 [ 65.328320][ T12] usb 2-1: Using ep0 maxpacket: 8 [ 65.333737][ T5] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 65.342836][ T5] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 65.351016][ T1737] usb 1-1: Using ep0 maxpacket: 8 [ 65.353935][ T83] usb 5-1: config 0 has an invalid interface number: 67 but max is 0 [ 65.357572][ T5] usb 6-1: config 0 descriptor?? [ 65.364291][ T83] usb 5-1: config 0 has no interface number 0 [ 65.368240][ T83] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 65.369555][ T102] usb 3-1: config 0 has an invalid interface number: 67 but max is 0 [ 65.375482][ T83] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 65.383128][ T83] usb 5-1: config 0 descriptor?? [ 65.384651][ T102] usb 3-1: config 0 has no interface number 0 [ 65.384848][ T102] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 65.421181][ T102] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 65.423894][ T22] usb 4-1: Using ep0 maxpacket: 8 [ 65.430663][ T5] rio500 6-1:0.67: USB Rio found at address 3 [ 65.435868][ T83] rio500 5-1:0.67: USB Rio found at address 3 [ 65.456229][ T102] usb 3-1: config 0 descriptor?? [ 65.464121][ T12] usb 2-1: config 0 has an invalid interface number: 67 but max is 0 [ 65.472229][ T12] usb 2-1: config 0 has no interface number 0 [ 65.478743][ T12] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 65.488084][ T12] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 65.497552][ T102] rio500 3-1:0.67: Second USB Rio at address 3 refused [ 65.504779][ T1737] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 65.512870][ T1737] usb 1-1: config 0 has no interface number 0 [ 65.519062][ T102] rio500: probe of 3-1:0.67 failed with error -16 [ 65.527373][ T12] usb 2-1: config 0 descriptor?? [ 65.532565][ T1737] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 65.541773][ T1737] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 65.550809][ T1737] usb 1-1: config 0 descriptor?? [ 65.565193][ T12] rio500 2-1:0.67: Second USB Rio at address 3 refused [ 65.572504][ T12] rio500: probe of 2-1:0.67 failed with error -16 [ 65.583998][ T22] usb 4-1: config 0 has an invalid interface number: 67 but max is 0 [ 65.592214][ T22] usb 4-1: config 0 has no interface number 0 [ 65.595194][ T1737] rio500 1-1:0.67: Second USB Rio at address 3 refused [ 65.598822][ T22] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 executing program executing program [ 65.605595][ T1737] rio500: probe of 1-1:0.67 failed with error -16 [ 65.614473][ T22] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 65.632332][ T22] usb 4-1: config 0 descriptor?? [ 65.638516][ T1737] usb 5-1: USB disconnect, device number 3 [ 65.646177][ T1737] rio500 5-1:0.67: USB Rio disconnected. [ 65.653741][ T12] usb 6-1: USB disconnect, device number 3 executing program [ 65.661815][ T12] ================================================================== [ 65.670101][ T12] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 65.678418][ T12] [ 65.680764][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0+ #0 [ 65.687815][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.697715][ T83] usb 3-1: USB disconnect, device number 3 [ 65.697887][ T12] Workqueue: usb_hub_wq hub_event [ 65.708746][ T12] Call Trace: [ 65.712045][ T12] dump_stack+0xca/0x13e [ 65.716307][ T12] print_address_description.constprop.0+0x36/0x50 [ 65.722876][ T12] ? disconnect_rio+0x12b/0x1b0 [ 65.727733][ T12] kasan_report_invalid_free+0x61/0xa0 [ 65.733245][ T12] ? disconnect_rio+0x12b/0x1b0 [ 65.738107][ T12] __kasan_slab_free+0x162/0x180 [ 65.743042][ T12] ? disconnect_rio+0x12b/0x1b0 [ 65.747885][ T12] kfree+0xe4/0x2f0 [ 65.751712][ T12] disconnect_rio+0x12b/0x1b0 [ 65.756381][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 65.761565][ T12] ? usb_autoresume_device+0x60/0x60 [ 65.765468][ T17] usb 2-1: USB disconnect, device number 3 [ 65.766846][ T12] device_release_driver_internal+0x42f/0x500 [ 65.778693][ T12] bus_remove_device+0x2dc/0x4a0 [ 65.783644][ T12] device_del+0x420/0xb10 [ 65.787967][ T12] ? __device_links_no_driver+0x240/0x240 [ 65.793704][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 65.798992][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 65.804266][ T12] usb_disable_device+0x211/0x690 [ 65.809278][ T12] usb_disconnect+0x284/0x8d0 executing program [ 65.813964][ T12] hub_event+0x1454/0x3640 [ 65.818360][ T12] ? find_held_lock+0x2d/0x110 [ 65.823278][ T12] ? mark_held_locks+0xe0/0xe0 [ 65.828023][ T12] ? hub_port_debounce+0x260/0x260 [ 65.833128][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.838685][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 65.843974][ T12] process_one_work+0x92b/0x1530 [ 65.848997][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.854448][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 65.859454][ T12] worker_thread+0x96/0xe20 [ 65.863950][ T12] ? process_one_work+0x1530/0x1530 [ 65.869145][ T12] kthread+0x318/0x420 [ 65.873292][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 65.878670][ T12] ret_from_fork+0x24/0x30 [ 65.883104][ T12] [ 65.885436][ T12] Allocated by task 83: [ 65.889590][ T12] save_stack+0x1b/0x80 [ 65.893801][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 65.899484][ T12] probe_rio+0x135/0x248 [ 65.903726][ T12] usb_probe_interface+0x305/0x7a0 [ 65.908833][ T12] really_probe+0x281/0x6d0 [ 65.913335][ T12] driver_probe_device+0x104/0x210 [ 65.918429][ T12] __device_attach_driver+0x1c2/0x220 [ 65.923780][ T12] bus_for_each_drv+0x162/0x1e0 [ 65.928627][ T12] __device_attach+0x217/0x360 [ 65.933384][ T12] bus_probe_device+0x1e4/0x290 [ 65.938211][ T12] device_add+0xae6/0x16f0 [ 65.942607][ T12] usb_set_configuration+0xdf6/0x1670 [ 65.947964][ T12] generic_probe+0x9d/0xd5 [ 65.952371][ T12] usb_probe_device+0x99/0x100 [ 65.957137][ T12] really_probe+0x281/0x6d0 [ 65.961639][ T12] driver_probe_device+0x104/0x210 [ 65.966732][ T12] __device_attach_driver+0x1c2/0x220 [ 65.972095][ T12] bus_for_each_drv+0x162/0x1e0 [ 65.976928][ T12] __device_attach+0x217/0x360 [ 65.982539][ T12] bus_probe_device+0x1e4/0x290 [ 65.987363][ T12] device_add+0xae6/0x16f0 [ 65.991758][ T12] usb_new_device.cold+0x6a4/0xe79 [ 65.996850][ T12] hub_event+0x1b5c/0x3640 [ 66.001243][ T12] process_one_work+0x92b/0x1530 [ 66.006161][ T12] worker_thread+0x96/0xe20 [ 66.010649][ T12] kthread+0x318/0x420 [ 66.014713][ T12] ret_from_fork+0x24/0x30 [ 66.019108][ T12] [ 66.021422][ T12] Freed by task 1737: [ 66.025394][ T12] save_stack+0x1b/0x80 [ 66.029537][ T12] __kasan_slab_free+0x130/0x180 [ 66.034463][ T12] kfree+0xe4/0x2f0 [ 66.038265][ T12] disconnect_rio+0x12b/0x1b0 [ 66.042930][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 66.048120][ T12] device_release_driver_internal+0x42f/0x500 [ 66.058687][ T12] bus_remove_device+0x2dc/0x4a0 [ 66.063612][ T12] device_del+0x420/0xb10 [ 66.068187][ T12] usb_disable_device+0x211/0x690 [ 66.073217][ T12] usb_disconnect+0x284/0x8d0 [ 66.077874][ T12] hub_event+0x1454/0x3640 [ 66.082288][ T12] process_one_work+0x92b/0x1530 [ 66.087202][ T12] worker_thread+0x96/0xe20 [ 66.091691][ T12] kthread+0x318/0x420 [ 66.095745][ T12] ret_from_fork+0x24/0x30 [ 66.100142][ T12] [ 66.102463][ T12] The buggy address belongs to the object at ffff8881c6604400 [ 66.102463][ T12] which belongs to the cache kmalloc-4k of size 4096 [ 66.116512][ T12] The buggy address is located 0 bytes inside of [ 66.116512][ T12] 4096-byte region [ffff8881c6604400, ffff8881c6605400) [ 66.129684][ T12] The buggy address belongs to the page: [ 66.135300][ T12] page:ffffea0007198000 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 66.146215][ T12] flags: 0x200000000010200(slab|head) [ 66.151571][ T12] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 66.160235][ T12] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 66.168837][ T12] page dumped because: kasan: bad access detected [ 66.175221][ T12] [ 66.177538][ T12] Memory state around the buggy address: [ 66.183159][ T12] ffff8881c6604300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 66.191202][ T12] ffff8881c6604380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 66.199424][ T12] >ffff8881c6604400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.207463][ T12] ^ executing program [ 66.211525][ T12] ffff8881c6604480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.219566][ T12] ffff8881c6604500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 66.227613][ T12] ================================================================== [ 66.235663][ T12] Disabling lock debugging due to kernel taint [ 66.241894][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 66.246097][ T22] rio500 4-1:0.67: USB Rio found at address 3 [ 66.248918][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.3.0+ #0 [ 66.263388][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.263699][ T1738] usb 1-1: USB disconnect, device number 3 [ 66.273459][ T12] Workqueue: usb_hub_wq hub_event [ 66.273464][ T12] Call Trace: [ 66.273479][ T12] dump_stack+0xca/0x13e [ 66.273490][ T12] panic+0x2a3/0x6da [ 66.273498][ T12] ? add_taint.cold+0x16/0x16 [ 66.273508][ T12] ? disconnect_rio+0x12b/0x1b0 [ 66.273526][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 66.310199][ T12] ? disconnect_rio+0x12b/0x1b0 [ 66.315044][ T12] end_report+0x43/0x49 [ 66.319177][ T12] kasan_report_invalid_free+0x7d/0xa0 [ 66.324611][ T12] ? disconnect_rio+0x12b/0x1b0 [ 66.329455][ T12] __kasan_slab_free+0x162/0x180 [ 66.334386][ T12] ? disconnect_rio+0x12b/0x1b0 [ 66.339221][ T12] kfree+0xe4/0x2f0 [ 66.343008][ T12] disconnect_rio+0x12b/0x1b0 [ 66.347673][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 66.352850][ T12] ? usb_autoresume_device+0x60/0x60 [ 66.358113][ T12] device_release_driver_internal+0x42f/0x500 [ 66.364157][ T12] bus_remove_device+0x2dc/0x4a0 [ 66.369070][ T12] device_del+0x420/0xb10 [ 66.373374][ T12] ? __device_links_no_driver+0x240/0x240 [ 66.379167][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 66.384442][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 66.389719][ T12] usb_disable_device+0x211/0x690 [ 66.394729][ T12] usb_disconnect+0x284/0x8d0 [ 66.399386][ T12] hub_event+0x1454/0x3640 [ 66.403780][ T12] ? find_held_lock+0x2d/0x110 [ 66.408526][ T12] ? mark_held_locks+0xe0/0xe0 [ 66.413265][ T12] ? hub_port_debounce+0x260/0x260 executing program [ 66.418352][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.423872][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 66.429139][ T12] process_one_work+0x92b/0x1530 [ 66.434076][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.439430][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 66.444453][ T12] worker_thread+0x96/0xe20 [ 66.448955][ T12] ? process_one_work+0x1530/0x1530 [ 66.454156][ T12] kthread+0x318/0x420 [ 66.458207][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 66.463584][ T12] ret_from_fork+0x24/0x30 [ 66.468573][ T12] Kernel Offset: disabled [ 66.472910][ T12] Rebooting in 86400 seconds..