[info] Using makefile-style concurrent boot in runlevel 2. [....] Starting enhanced syslogd: rsyslogd[ 14.927979][ C0] 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 '10.128.1.52' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 29.186984][ T5] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 29.186991][ T83] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 29.187296][ T102] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 29.194670][ T17] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 29.217478][ T1741] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 29.224996][ T22] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 29.426951][ T5] usb 4-1: Using ep0 maxpacket: 8 [ 29.426957][ T83] usb 6-1: Using ep0 maxpacket: 8 [ 29.437261][ T102] usb 1-1: Using ep0 maxpacket: 8 [ 29.467482][ T22] usb 3-1: Using ep0 maxpacket: 8 [ 29.472651][ T1741] usb 5-1: Using ep0 maxpacket: 8 [ 29.477733][ T17] usb 2-1: Using ep0 maxpacket: 8 [ 29.547117][ T83] usb 6-1: config 0 has an invalid interface number: 67 but max is 0 [ 29.555322][ T83] usb 6-1: config 0 has no interface number 0 [ 29.561905][ T83] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 29.567061][ T102] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 29.570984][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 29.579165][ T102] usb 1-1: config 0 has no interface number 0 [ 29.579316][ T5] usb 4-1: config 0 has an invalid interface number: 67 but max is 0 [ 29.590599][ T83] usb 6-1: config 0 descriptor?? [ 29.593360][ T5] usb 4-1: config 0 has no interface number 0 [ 29.597338][ T5] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 29.601831][ T1741] usb 5-1: config 0 has an invalid interface number: 67 but max is 0 [ 29.606566][ T5] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 29.606661][ T102] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 29.612703][ T1741] usb 5-1: config 0 has no interface number 0 [ 29.612777][ T22] usb 3-1: config 0 has an invalid interface number: 67 but max is 0 [ 29.621749][ T102] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 29.623924][ T5] usb 4-1: config 0 descriptor?? [ 29.629870][ T22] usb 3-1: config 0 has no interface number 0 [ 29.629921][ T17] usb 2-1: config 0 has an invalid interface number: 67 but max is 0 [ 29.629931][ T17] usb 2-1: config 0 has no interface number 0 [ 29.629964][ T17] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 29.629978][ T17] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 29.630494][ T1741] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 29.646714][ T102] usb 1-1: config 0 descriptor?? [ 29.647143][ T1741] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 29.647486][ T17] usb 2-1: config 0 descriptor?? [ 29.698648][ T102] rio500 1-1:0.67: USB Rio found at address 2 [ 29.706508][ T22] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 29.721760][ T5] rio500 4-1:0.67: USB Rio found at address 2 [ 29.723616][ T22] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 29.774982][ T83] rio500 6-1:0.67: Second USB Rio at address 2 refused [ 29.782068][ T83] rio500: probe of 6-1:0.67 failed with error -16 [ 29.790184][ T1741] usb 5-1: config 0 descriptor?? [ 29.797803][ T22] usb 3-1: config 0 descriptor?? [ 29.828295][ T1741] rio500 5-1:0.67: Second USB Rio at address 2 refused [ 29.835230][ T1741] rio500: probe of 5-1:0.67 failed with error -16 [ 29.843170][ T17] rio500 2-1:0.67: Second USB Rio at address 2 refused [ 29.851328][ T22] rio500 3-1:0.67: Second USB Rio at address 2 refused [ 29.858307][ T17] rio500: probe of 2-1:0.67 failed with error -16 [ 29.866045][ T22] rio500: probe of 3-1:0.67 failed with error -16 executing program executing program [ 29.919024][ T102] usb 1-1: USB disconnect, device number 2 [ 29.921156][ T22] usb 4-1: USB disconnect, device number 2 [ 29.931112][ T102] rio500 1-1:0.67: USB Rio disconnected. [ 29.941283][ T22] ================================================================== [ 29.950080][ T22] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 29.966029][ T5] usb 6-1: USB disconnect, device number 2 [ 29.969064][ T22] [ 29.969082][ T22] CPU: 1 PID: 22 Comm: kworker/1:1 Not tainted 5.3.0+ #0 [ 29.969089][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 29.969104][ T22] Workqueue: usb_hub_wq hub_event [ 29.999378][ T22] Call Trace: [ 30.002673][ T22] dump_stack+0xca/0x13e [ 30.006908][ T22] print_address_description.constprop.0+0x36/0x50 [ 30.013424][ T22] ? disconnect_rio+0x12b/0x1b0 [ 30.018267][ T22] kasan_report_invalid_free+0x61/0xa0 [ 30.023713][ T22] ? disconnect_rio+0x12b/0x1b0 [ 30.028558][ T22] __kasan_slab_free+0x162/0x180 [ 30.029234][ T1743] usb 2-1: USB disconnect, device number 2 [ 30.033493][ T22] ? disconnect_rio+0x12b/0x1b0 [ 30.044108][ T22] kfree+0xe4/0x2f0 [ 30.047921][ T22] disconnect_rio+0x12b/0x1b0 [ 30.052600][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 30.054534][ T1754] usb 5-1: USB disconnect, device number 2 [ 30.057798][ T22] ? usb_autoresume_device+0x60/0x60 executing program [ 30.057815][ T22] device_release_driver_internal+0x42f/0x500 [ 30.057826][ T22] bus_remove_device+0x2dc/0x4a0 [ 30.057836][ T22] device_del+0x420/0xb10 [ 30.057847][ T22] ? __device_links_no_driver+0x240/0x240 [ 30.057866][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 30.070017][ T12] usb 3-1: USB disconnect, device number 2 [ 30.074973][ T22] ? remove_intf_ep_devs+0x13f/0x1d0 [ 30.074986][ T22] usb_disable_device+0x211/0x690 [ 30.074997][ T22] usb_disconnect+0x284/0x8d0 [ 30.075012][ T22] hub_event+0x1454/0x3640 [ 30.120265][ T22] ? find_held_lock+0x2d/0x110 [ 30.125008][ T22] ? mark_held_locks+0xe0/0xe0 [ 30.129752][ T22] ? hub_port_debounce+0x260/0x260 [ 30.134844][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 30.140371][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 30.145638][ T22] process_one_work+0x92b/0x1530 [ 30.150555][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 30.155907][ T22] ? do_raw_spin_lock+0x11a/0x280 [ 30.160910][ T22] worker_thread+0x96/0xe20 [ 30.165394][ T22] ? process_one_work+0x1530/0x1530 [ 30.170578][ T22] kthread+0x318/0x420 [ 30.174626][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 30.179982][ T22] ret_from_fork+0x24/0x30 [ 30.184370][ T22] [ 30.186688][ T22] Allocated by task 102: [ 30.190914][ T22] save_stack+0x1b/0x80 [ 30.195054][ T22] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 30.200672][ T22] probe_rio+0x135/0x248 [ 30.204888][ T22] usb_probe_interface+0x305/0x7a0 [ 30.210055][ T22] really_probe+0x281/0x6d0 [ 30.214707][ T22] driver_probe_device+0x104/0x210 [ 30.219810][ T22] __device_attach_driver+0x1c2/0x220 [ 30.225169][ T22] bus_for_each_drv+0x162/0x1e0 [ 30.229996][ T22] __device_attach+0x217/0x360 [ 30.234748][ T22] bus_probe_device+0x1e4/0x290 [ 30.239575][ T22] device_add+0xae6/0x16f0 [ 30.243970][ T22] usb_set_configuration+0xdf6/0x1670 [ 30.249317][ T22] generic_probe+0x9d/0xd5 [ 30.254059][ T22] usb_probe_device+0x99/0x100 [ 30.258813][ T22] really_probe+0x281/0x6d0 [ 30.263293][ T22] driver_probe_device+0x104/0x210 [ 30.268383][ T22] __device_attach_driver+0x1c2/0x220 [ 30.273747][ T22] bus_for_each_drv+0x162/0x1e0 [ 30.278584][ T22] __device_attach+0x217/0x360 [ 30.283335][ T22] bus_probe_device+0x1e4/0x290 [ 30.286956][ T102] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 30.288163][ T22] device_add+0xae6/0x16f0 [ 30.288176][ T22] usb_new_device.cold+0x6a4/0xe79 [ 30.288186][ T22] hub_event+0x1b5c/0x3640 [ 30.288199][ T22] process_one_work+0x92b/0x1530 [ 30.288212][ T22] worker_thread+0x96/0xe20 [ 30.318905][ T22] kthread+0x318/0x420 [ 30.322976][ T22] ret_from_fork+0x24/0x30 [ 30.327377][ T22] [ 30.329685][ T22] Freed by task 102: [ 30.333572][ T22] save_stack+0x1b/0x80 [ 30.337725][ T22] __kasan_slab_free+0x130/0x180 [ 30.342649][ T22] kfree+0xe4/0x2f0 [ 30.346436][ T22] disconnect_rio+0x12b/0x1b0 [ 30.351091][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 30.356303][ T22] device_release_driver_internal+0x42f/0x500 [ 30.362346][ T22] bus_remove_device+0x2dc/0x4a0 [ 30.367260][ T22] device_del+0x420/0xb10 [ 30.371577][ T22] usb_disable_device+0x211/0x690 [ 30.376579][ T22] usb_disconnect+0x284/0x8d0 [ 30.381242][ T22] hub_event+0x1454/0x3640 [ 30.385637][ T22] process_one_work+0x92b/0x1530 [ 30.390560][ T22] worker_thread+0x96/0xe20 [ 30.395040][ T22] kthread+0x318/0x420 [ 30.399089][ T22] ret_from_fork+0x24/0x30 [ 30.403475][ T22] [ 30.405792][ T22] The buggy address belongs to the object at ffff8881d54bd500 [ 30.405792][ T22] which belongs to the cache kmalloc-4k of size 4096 [ 30.419830][ T22] The buggy address is located 0 bytes inside of [ 30.419830][ T22] 4096-byte region [ffff8881d54bd500, ffff8881d54be500) [ 30.433007][ T22] The buggy address belongs to the page: [ 30.438626][ T22] page:ffffea0007552e00 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 30.449548][ T22] flags: 0x200000000010200(slab|head) [ 30.454909][ T22] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 30.463582][ T22] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 30.466969][ T1754] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 30.472144][ T22] page dumped because: kasan: bad access detected [ 30.472149][ T22] [ 30.472152][ T22] Memory state around the buggy address: [ 30.472162][ T22] ffff8881d54bd400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.472172][ T22] ffff8881d54bd480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.472181][ T22] >ffff8881d54bd500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb executing program executing program executing program [ 30.472185][ T22] ^ [ 30.472197][ T22] ffff8881d54bd580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.526948][ T102] usb 1-1: Using ep0 maxpacket: 8 [ 30.530144][ T22] ffff8881d54bd600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.530149][ T22] ================================================================== [ 30.530153][ T22] Disabling lock debugging due to kernel taint [ 30.530229][ T22] Kernel panic - not syncing: panic_on_warn set ... [ 30.563978][ T22] CPU: 1 PID: 22 Comm: kworker/1:1 Tainted: G B 5.3.0+ #0 [ 30.572360][ T22] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 30.582402][ T22] Workqueue: usb_hub_wq hub_event [ 30.587928][ T22] Call Trace: [ 30.591205][ T22] dump_stack+0xca/0x13e [ 30.595477][ T22] panic+0x2a3/0x6da [ 30.599352][ T22] ? add_taint.cold+0x16/0x16 [ 30.604016][ T22] ? disconnect_rio+0x12b/0x1b0 [ 30.608846][ T22] ? trace_hardirqs_on+0x55/0x1e0 [ 30.613866][ T22] ? disconnect_rio+0x12b/0x1b0 [ 30.619048][ T22] end_report+0x43/0x49 [ 30.623179][ T22] kasan_report_invalid_free+0x7d/0xa0 [ 30.628613][ T22] ? disconnect_rio+0x12b/0x1b0 [ 30.633440][ T22] __kasan_slab_free+0x162/0x180 [ 30.638354][ T22] ? disconnect_rio+0x12b/0x1b0 [ 30.643179][ T22] kfree+0xe4/0x2f0 [ 30.646968][ T22] disconnect_rio+0x12b/0x1b0 [ 30.647004][ T102] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 30.651659][ T22] usb_unbind_interface+0x1bd/0x8a0 [ 30.651672][ T22] ? usb_autoresume_device+0x60/0x60 [ 30.651692][ T22] device_release_driver_internal+0x42f/0x500 [ 30.651709][ T22] bus_remove_device+0x2dc/0x4a0 [ 30.659820][ T102] usb 1-1: config 0 has no interface number 0 [ 30.664942][ T22] device_del+0x420/0xb10 [ 30.671042][ T102] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 30.676260][ T22] ? __device_links_no_driver+0x240/0x240 [ 30.676274][ T22] ? lockdep_hardirqs_on+0x382/0x580 [ 30.676282][ T22] ? remove_intf_ep_devs+0x13f/0x1d0 [ 30.676296][ T22] usb_disable_device+0x211/0x690 [ 30.681246][ T102] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 30.687256][ T22] usb_disconnect+0x284/0x8d0 [ 30.687267][ T22] hub_event+0x1454/0x3640 [ 30.687278][ T22] ? find_held_lock+0x2d/0x110 [ 30.687287][ T22] ? mark_held_locks+0xe0/0xe0 [ 30.687296][ T22] ? hub_port_debounce+0x260/0x260 [ 30.687308][ T22] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 30.687323][ T22] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 30.695439][ T102] usb 1-1: config 0 descriptor?? [ 30.700626][ T22] process_one_work+0x92b/0x1530 [ 30.700639][ T22] ? pwq_dec_nr_in_flight+0x310/0x310 [ 30.700649][ T22] ? do_raw_spin_lock+0x11a/0x280 [ 30.700659][ T22] worker_thread+0x96/0xe20 [ 30.700668][ T22] ? process_one_work+0x1530/0x1530 [ 30.700688][ T22] kthread+0x318/0x420 [ 30.717035][ T1754] usb 5-1: Using ep0 maxpacket: 8 [ 30.721905][ T22] ? kthread_create_on_node+0xf0/0xf0 [ 30.721919][ T22] ret_from_fork+0x24/0x30 [ 30.730551][ T22] Kernel Offset: disabled [ 30.817773][ T22] Rebooting in 86400 seconds..