INIT: Entering runlevel: 2 [info] Using makefile-style concurrent boot in runlevel 2. [....] 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 '10.128.0.87' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 68.482283][ T83] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 68.482291][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 68.497440][ T1738] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 68.505055][ T5] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 68.512570][ T1737] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 68.512676][ T17] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 68.742247][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 68.752242][ T12] usb 1-1: Using ep0 maxpacket: 16 [ 68.757672][ T5] usb 4-1: Using ep0 maxpacket: 16 [ 68.762302][ T17] usb 3-1: Using ep0 maxpacket: 16 [ 68.764238][ T1737] usb 5-1: Using ep0 maxpacket: 16 [ 68.774534][ T1738] usb 2-1: Using ep0 maxpacket: 16 [ 68.862341][ T83] usb 6-1: config 0 has an invalid interface number: 133 but max is 0 [ 68.870811][ T83] usb 6-1: config 0 has no interface number 0 [ 68.876966][ T83] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 68.882448][ T12] usb 1-1: config 0 has an invalid interface number: 133 but max is 0 [ 68.886064][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 68.894324][ T12] usb 1-1: config 0 has no interface number 0 [ 68.902266][ T17] usb 3-1: config 0 has an invalid interface number: 133 but max is 0 [ 68.908373][ T1738] usb 2-1: config 0 has an invalid interface number: 133 but max is 0 [ 68.916434][ T17] usb 3-1: config 0 has no interface number 0 [ 68.924582][ T1738] usb 2-1: config 0 has no interface number 0 [ 68.936764][ T5] usb 4-1: config 0 has an invalid interface number: 133 but max is 0 [ 68.936831][ T83] usb 6-1: config 0 descriptor?? [ 68.944948][ T5] usb 4-1: config 0 has no interface number 0 [ 68.945101][ T1737] usb 5-1: config 0 has an invalid interface number: 133 but max is 0 [ 68.950661][ T17] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 68.956044][ T1737] usb 5-1: config 0 has no interface number 0 [ 68.956210][ T5] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 68.964269][ T17] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 68.969623][ T17] usb 3-1: config 0 descriptor?? [ 68.973341][ T5] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 68.973459][ T1737] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 68.973473][ T1737] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 68.973982][ T12] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 69.003887][ T83] rio500 6-1:0.133: USB Rio found at address 2 [ 69.009630][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 69.025955][ T17] rio500 3-1:0.133: USB Rio found at address 2 [ 69.026914][ T1737] usb 5-1: config 0 descriptor?? [ 69.061678][ T1738] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 69.070775][ T1738] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 69.079088][ T5] usb 4-1: config 0 descriptor?? [ 69.085178][ T1738] usb 2-1: config 0 descriptor?? [ 69.091115][ T12] usb 1-1: config 0 descriptor?? [ 69.133800][ T5] rio500 4-1:0.133: Second USB Rio at address 2 refused [ 69.140935][ T5] rio500: probe of 4-1:0.133 failed with error -16 [ 69.148703][ T1737] rio500 5-1:0.133: Second USB Rio at address 2 refused [ 69.157015][ T1738] rio500 2-1:0.133: Second USB Rio at address 2 refused [ 69.165264][ T12] rio500 1-1:0.133: Second USB Rio at address 2 refused [ 69.172315][ T1737] rio500: probe of 5-1:0.133 failed with error -16 executing program [ 69.180173][ T1738] rio500: probe of 2-1:0.133 failed with error -16 [ 69.186808][ T12] rio500: probe of 1-1:0.133 failed with error -16 [ 69.223934][ T12] usb 6-1: USB disconnect, device number 2 executing program [ 69.224014][ T17] usb 3-1: USB disconnect, device number 2 [ 69.235101][ T12] rio500 6-1:0.133: USB Rio disconnected. [ 69.246032][ T17] ================================================================== [ 69.254209][ T17] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 69.262520][ T17] [ 69.264834][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.4.0-rc1+ #0 [ 69.272177][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.282220][ T17] Workqueue: usb_hub_wq hub_event [ 69.287217][ T17] Call Trace: [ 69.290504][ T17] dump_stack+0xca/0x13e [ 69.294729][ T17] print_address_description.constprop.0+0x36/0x50 [ 69.301211][ T17] ? disconnect_rio+0x12b/0x1b0 [ 69.306036][ T17] kasan_report_invalid_free+0x61/0xa0 [ 69.311472][ T17] ? disconnect_rio+0x12b/0x1b0 [ 69.316309][ T17] __kasan_slab_free+0x162/0x180 [ 69.321231][ T17] ? disconnect_rio+0x12b/0x1b0 [ 69.326056][ T17] kfree+0xe4/0x2f0 [ 69.329842][ T17] disconnect_rio+0x12b/0x1b0 [ 69.334505][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 69.339679][ T17] ? usb_autoresume_device+0x60/0x60 [ 69.344951][ T17] device_release_driver_internal+0x42f/0x500 [ 69.351018][ T17] bus_remove_device+0x2dc/0x4a0 [ 69.355937][ T17] device_del+0x420/0xb20 [ 69.360266][ T17] ? __device_link_del+0x2f0/0x2f0 [ 69.365359][ T17] ? lockdep_hardirqs_on+0x382/0x580 [ 69.370624][ T17] ? remove_intf_ep_devs+0x13f/0x1d0 [ 69.375894][ T17] usb_disable_device+0x211/0x690 [ 69.380916][ T17] usb_disconnect+0x284/0x8d0 [ 69.385574][ T17] hub_event+0x1454/0x3640 [ 69.389969][ T17] ? find_held_lock+0x2d/0x110 [ 69.394707][ T17] ? mark_held_locks+0xe0/0xe0 [ 69.399462][ T17] ? hub_port_debounce+0x260/0x260 [ 69.404564][ T17] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 69.410091][ T17] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 69.415366][ T17] process_one_work+0x92b/0x1530 [ 69.420289][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 69.425639][ T17] ? do_raw_spin_lock+0x11a/0x280 [ 69.430642][ T17] worker_thread+0x96/0xe20 [ 69.435137][ T17] ? process_one_work+0x1530/0x1530 [ 69.440322][ T17] kthread+0x318/0x420 [ 69.444369][ T17] ? kthread_create_on_node+0xf0/0xf0 [ 69.449722][ T17] ret_from_fork+0x24/0x30 [ 69.454118][ T17] [ 69.456440][ T17] Allocated by task 17: [ 69.460579][ T17] save_stack+0x1b/0x80 [ 69.464714][ T17] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 69.470345][ T17] probe_rio+0x135/0x248 [ 69.474571][ T17] usb_probe_interface+0x305/0x7a0 [ 69.479658][ T17] really_probe+0x281/0x6d0 [ 69.484137][ T17] driver_probe_device+0x104/0x210 [ 69.489227][ T17] __device_attach_driver+0x1c2/0x220 [ 69.494573][ T17] bus_for_each_drv+0x162/0x1e0 [ 69.499734][ T17] __device_attach+0x217/0x360 [ 69.504486][ T17] bus_probe_device+0x1e4/0x290 [ 69.509424][ T17] device_add+0xae6/0x16f0 [ 69.513828][ T17] usb_set_configuration+0xdf6/0x1670 [ 69.519354][ T17] generic_probe+0x9d/0xd5 [ 69.523758][ T17] usb_probe_device+0x99/0x100 [ 69.528506][ T17] really_probe+0x281/0x6d0 [ 69.533095][ T17] driver_probe_device+0x104/0x210 [ 69.538181][ T17] __device_attach_driver+0x1c2/0x220 [ 69.543554][ T17] bus_for_each_drv+0x162/0x1e0 [ 69.548407][ T17] __device_attach+0x217/0x360 [ 69.553207][ T17] bus_probe_device+0x1e4/0x290 [ 69.558199][ T17] device_add+0xae6/0x16f0 [ 69.562621][ T17] usb_new_device.cold+0x6a4/0xe79 [ 69.567723][ T17] hub_event+0x1b5c/0x3640 [ 69.572123][ T17] process_one_work+0x92b/0x1530 [ 69.577040][ T17] worker_thread+0x96/0xe20 [ 69.581518][ T17] kthread+0x318/0x420 [ 69.585572][ T17] ret_from_fork+0x24/0x30 [ 69.590225][ T17] [ 69.592532][ T17] Freed by task 12: [ 69.596320][ T17] save_stack+0x1b/0x80 [ 69.600501][ T17] __kasan_slab_free+0x130/0x180 [ 69.605428][ T17] kfree+0xe4/0x2f0 [ 69.609221][ T17] disconnect_rio+0x12b/0x1b0 [ 69.613883][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 69.619064][ T17] device_release_driver_internal+0x42f/0x500 [ 69.625157][ T17] bus_remove_device+0x2dc/0x4a0 [ 69.630069][ T17] device_del+0x420/0xb20 [ 69.634492][ T17] usb_disable_device+0x211/0x690 [ 69.639504][ T17] usb_disconnect+0x284/0x8d0 [ 69.644166][ T17] hub_event+0x1454/0x3640 [ 69.648557][ T17] process_one_work+0x92b/0x1530 [ 69.653468][ T17] worker_thread+0x96/0xe20 [ 69.657956][ T17] kthread+0x318/0x420 [ 69.662009][ T17] ret_from_fork+0x24/0x30 [ 69.666405][ T17] [ 69.668725][ T17] The buggy address belongs to the object at ffff8881d285a200 [ 69.668725][ T17] which belongs to the cache kmalloc-4k of size 4096 [ 69.683572][ T17] The buggy address is located 0 bytes inside of [ 69.683572][ T17] 4096-byte region [ffff8881d285a200, ffff8881d285b200) [ 69.696846][ T17] The buggy address belongs to the page: [ 69.702456][ T17] page:ffffea00074a1600 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 69.713365][ T17] flags: 0x200000000010200(slab|head) [ 69.718722][ T17] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 69.727300][ T17] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 69.735869][ T17] page dumped because: kasan: bad access detected [ 69.742258][ T17] [ 69.744571][ T17] Memory state around the buggy address: [ 69.750180][ T17] ffff8881d285a100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.758220][ T17] ffff8881d285a180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 69.766268][ T17] >ffff8881d285a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.774306][ T17] ^ [ 69.778357][ T17] ffff8881d285a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.786401][ T17] ffff8881d285a300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.794495][ T17] ================================================================== [ 69.802539][ T17] Disabling lock debugging due to kernel taint [ 69.808869][ T17] Kernel panic - not syncing: panic_on_warn set ... [ 69.814417][ T1738] usb 5-1: USB disconnect, device number 2 [ 69.815458][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Tainted: G B 5.4.0-rc1+ #0 executing program executing program executing program executing program [ 69.815469][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.821756][ T1742] usb 4-1: USB disconnect, device number 2 [ 69.829989][ T17] Workqueue: usb_hub_wq hub_event [ 69.829996][ T17] Call Trace: [ 69.830010][ T17] dump_stack+0xca/0x13e [ 69.830025][ T17] panic+0x2a3/0x6da [ 69.840246][ T1737] usb 1-1: USB disconnect, device number 2 [ 69.845834][ T17] ? add_taint.cold+0x16/0x16 [ 69.845846][ T17] ? disconnect_rio+0x12b/0x1b0 [ 69.845861][ T17] ? trace_hardirqs_on+0x55/0x1e0 [ 69.850889][ T5] usb 2-1: USB disconnect, device number 2 [ 69.854126][ T17] ? disconnect_rio+0x12b/0x1b0 [ 69.854136][ T17] end_report+0x43/0x49 [ 69.854149][ T17] kasan_report_invalid_free+0x7d/0xa0 [ 69.902704][ T17] ? disconnect_rio+0x12b/0x1b0 [ 69.907557][ T17] __kasan_slab_free+0x162/0x180 [ 69.912470][ T17] ? disconnect_rio+0x12b/0x1b0 [ 69.917300][ T17] kfree+0xe4/0x2f0 [ 69.921084][ T17] disconnect_rio+0x12b/0x1b0 [ 69.925744][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 69.930925][ T17] ? usb_autoresume_device+0x60/0x60 [ 69.936182][ T17] device_release_driver_internal+0x42f/0x500 [ 69.942249][ T17] bus_remove_device+0x2dc/0x4a0 [ 69.947692][ T17] device_del+0x420/0xb20 [ 69.952005][ T17] ? __device_link_del+0x2f0/0x2f0 [ 69.957138][ T17] ? lockdep_hardirqs_on+0x382/0x580 [ 69.962408][ T17] ? remove_intf_ep_devs+0x13f/0x1d0 [ 69.967667][ T17] usb_disable_device+0x211/0x690 [ 69.972704][ T17] usb_disconnect+0x284/0x8d0 [ 69.977356][ T17] hub_event+0x1454/0x3640 [ 69.981752][ T17] ? find_held_lock+0x2d/0x110 [ 69.986490][ T17] ? mark_held_locks+0xe0/0xe0 [ 69.991227][ T17] ? hub_port_debounce+0x260/0x260 [ 69.996312][ T17] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 70.001829][ T17] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 70.007084][ T17] process_one_work+0x92b/0x1530 [ 70.011998][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 70.017341][ T17] ? do_raw_spin_lock+0x11a/0x280 [ 70.022353][ T17] worker_thread+0x96/0xe20 [ 70.026830][ T17] ? process_one_work+0x1530/0x1530 [ 70.032007][ T17] kthread+0x318/0x420 [ 70.036061][ T17] ? kthread_create_on_node+0xf0/0xf0 [ 70.041406][ T17] ret_from_fork+0x24/0x30 [ 70.046645][ T17] Kernel Offset: disabled [ 70.050954][ T17] Rebooting in 86400 seconds..