[info] Using makefile-style concurrent boot in runlevel 2. [ 14.469873][ C1] random: crng init done [....] 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 '10.128.0.71' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 80.167372][ T17] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 80.167380][ T12] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 80.167677][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 80.177637][ T5] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 80.197810][ T1729] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 80.205427][ T102] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 80.407399][ T12] usb 6-1: Using ep0 maxpacket: 16 [ 80.417322][ T17] usb 4-1: Using ep0 maxpacket: 16 [ 80.422915][ T83] usb 1-1: Using ep0 maxpacket: 16 [ 80.437314][ T1729] usb 3-1: Using ep0 maxpacket: 16 [ 80.447630][ T102] usb 2-1: Using ep0 maxpacket: 16 [ 80.452889][ T5] usb 5-1: Using ep0 maxpacket: 16 [ 80.537520][ T12] usb 6-1: config 0 has an invalid interface number: 133 but max is 0 [ 80.545843][ T12] usb 6-1: config 0 has no interface number 0 [ 80.552265][ T12] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 80.557436][ T17] usb 4-1: config 0 has an invalid interface number: 133 but max is 0 [ 80.561416][ T12] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 80.569544][ T17] usb 4-1: config 0 has no interface number 0 [ 80.569639][ T83] usb 1-1: config 0 has an invalid interface number: 133 but max is 0 [ 80.577766][ T1729] usb 3-1: config 0 has an invalid interface number: 133 but max is 0 [ 80.583684][ T83] usb 1-1: config 0 has no interface number 0 [ 80.583821][ T17] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 80.591900][ T1729] usb 3-1: config 0 has no interface number 0 [ 80.592036][ T102] usb 2-1: config 0 has an invalid interface number: 133 but max is 0 [ 80.600068][ T17] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 80.600194][ T83] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 80.606129][ T102] usb 2-1: config 0 has no interface number 0 [ 80.606707][ T102] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 80.615400][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 80.619938][ T17] usb 4-1: config 0 descriptor?? [ 80.621697][ T102] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 80.621754][ T5] usb 5-1: config 0 has an invalid interface number: 133 but max is 0 [ 80.630729][ T83] usb 1-1: config 0 descriptor?? [ 80.637943][ T5] usb 5-1: config 0 has no interface number 0 [ 80.641106][ T1729] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 80.692409][ T17] rio500 4-1:0.133: USB Rio found at address 2 [ 80.696232][ T1729] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 80.696773][ T5] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 80.707045][ T83] rio500 1-1:0.133: USB Rio found at address 2 [ 80.711598][ T5] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 80.749804][ T102] usb 2-1: config 0 descriptor?? [ 80.755066][ T12] usb 6-1: config 0 descriptor?? [ 80.761268][ T1729] usb 3-1: config 0 descriptor?? [ 80.767983][ T5] usb 5-1: config 0 descriptor?? [ 80.799109][ T102] rio500 2-1:0.133: Second USB Rio at address 2 refused [ 80.806324][ T102] rio500: probe of 2-1:0.133 failed with error -16 [ 80.814296][ T12] rio500 6-1:0.133: Second USB Rio at address 2 refused [ 80.822538][ T1729] rio500 3-1:0.133: Second USB Rio at address 2 refused [ 80.830801][ T5] rio500 5-1:0.133: Second USB Rio at address 2 refused [ 80.837880][ T1729] rio500: probe of 3-1:0.133 failed with error -16 [ 80.845745][ T12] rio500: probe of 6-1:0.133 failed with error -16 [ 80.852399][ T5] rio500: probe of 5-1:0.133 failed with error -16 [ 80.889382][ T17] usb 4-1: USB disconnect, device number 2 executing program executing program [ 80.890723][ T5] usb 1-1: USB disconnect, device number 2 [ 80.903192][ T5] rio500 1-1:0.133: USB Rio disconnected. [ 80.911836][ T17] ================================================================== [ 80.920001][ T17] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 80.928425][ T17] [ 80.930744][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0+ #0 [ 80.937742][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 80.947785][ T17] Workqueue: usb_hub_wq hub_event [ 80.952783][ T17] Call Trace: [ 80.956057][ T17] dump_stack+0xca/0x13e [ 80.960630][ T17] print_address_description+0x6a/0x32c [ 80.966167][ T17] ? disconnect_rio+0x12b/0x1b0 [ 80.970994][ T17] kasan_report_invalid_free+0x61/0xa0 [ 80.976430][ T17] ? disconnect_rio+0x12b/0x1b0 [ 80.981270][ T17] __kasan_slab_free+0x162/0x180 [ 80.986189][ T17] ? disconnect_rio+0x12b/0x1b0 [ 80.991029][ T17] kfree+0xe4/0x2f0 [ 80.994827][ T17] disconnect_rio+0x12b/0x1b0 [ 80.999496][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 81.004672][ T17] ? usb_autoresume_device+0x60/0x60 [ 81.009936][ T17] device_release_driver_internal+0x42f/0x500 [ 81.015980][ T17] bus_remove_device+0x2dc/0x4a0 [ 81.020910][ T17] device_del+0x420/0xb10 [ 81.025259][ T17] ? __device_links_no_driver+0x240/0x240 [ 81.030966][ T17] ? lockdep_hardirqs_on+0x379/0x580 [ 81.036232][ T17] ? remove_intf_ep_devs+0x13f/0x1d0 [ 81.041499][ T17] usb_disable_device+0x211/0x690 [ 81.046501][ T17] usb_disconnect+0x284/0x8d0 [ 81.051164][ T17] hub_event+0x1454/0x3640 [ 81.055587][ T17] ? find_held_lock+0x2d/0x110 [ 81.060356][ T17] ? mark_held_locks+0xe0/0xe0 [ 81.065098][ T17] ? hub_port_debounce+0x260/0x260 [ 81.070187][ T17] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 81.075710][ T17] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 81.080977][ T17] process_one_work+0x92b/0x1530 [ 81.085904][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 81.091252][ T17] ? do_raw_spin_lock+0x11a/0x280 [ 81.096264][ T17] worker_thread+0x96/0xe20 [ 81.100944][ T17] ? process_one_work+0x1530/0x1530 [ 81.106129][ T17] kthread+0x318/0x420 [ 81.110347][ T17] ? kthread_create_on_node+0xf0/0xf0 [ 81.115708][ T17] ret_from_fork+0x24/0x30 [ 81.120100][ T17] [ 81.122517][ T17] Allocated by task 83: [ 81.126667][ T17] save_stack+0x1b/0x80 [ 81.130802][ T17] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 81.136528][ T17] probe_rio+0x135/0x248 [ 81.140755][ T17] usb_probe_interface+0x305/0x7a0 [ 81.145847][ T17] really_probe+0x281/0x6d0 [ 81.150329][ T17] driver_probe_device+0x101/0x1b0 [ 81.155427][ T17] __device_attach_driver+0x1c2/0x220 [ 81.160867][ T17] bus_for_each_drv+0x162/0x1e0 [ 81.165699][ T17] __device_attach+0x217/0x360 [ 81.170443][ T17] bus_probe_device+0x1e4/0x290 [ 81.176718][ T17] device_add+0xae6/0x16f0 [ 81.181126][ T17] usb_set_configuration+0xdf6/0x1670 [ 81.186486][ T17] generic_probe+0x9d/0xd5 [ 81.190886][ T17] usb_probe_device+0x99/0x100 [ 81.195723][ T17] really_probe+0x281/0x6d0 [ 81.200266][ T17] driver_probe_device+0x101/0x1b0 [ 81.205359][ T17] __device_attach_driver+0x1c2/0x220 [ 81.210720][ T17] bus_for_each_drv+0x162/0x1e0 [ 81.215590][ T17] __device_attach+0x217/0x360 [ 81.220340][ T17] bus_probe_device+0x1e4/0x290 [ 81.225170][ T17] device_add+0xae6/0x16f0 [ 81.229608][ T17] usb_new_device.cold+0x6a4/0xe79 [ 81.234753][ T17] hub_event+0x1b5c/0x3640 [ 81.239153][ T17] process_one_work+0x92b/0x1530 [ 81.244069][ T17] worker_thread+0x96/0xe20 [ 81.248648][ T17] kthread+0x318/0x420 [ 81.252721][ T17] ret_from_fork+0x24/0x30 [ 81.257124][ T17] [ 81.257334][ T5] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 81.259441][ T17] Freed by task 5: [ 81.259466][ T17] save_stack+0x1b/0x80 [ 81.259480][ T17] __kasan_slab_free+0x130/0x180 [ 81.279727][ T17] kfree+0xe4/0x2f0 [ 81.283535][ T17] disconnect_rio+0x12b/0x1b0 [ 81.288190][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 81.293368][ T17] device_release_driver_internal+0x42f/0x500 [ 81.299506][ T17] bus_remove_device+0x2dc/0x4a0 [ 81.304428][ T17] device_del+0x420/0xb10 [ 81.308778][ T17] usb_disable_device+0x211/0x690 [ 81.313779][ T17] usb_disconnect+0x284/0x8d0 [ 81.318450][ T17] hub_event+0x1454/0x3640 [ 81.322845][ T17] process_one_work+0x92b/0x1530 [ 81.327763][ T17] worker_thread+0x96/0xe20 [ 81.332241][ T17] kthread+0x318/0x420 [ 81.336286][ T17] ret_from_fork+0x24/0x30 [ 81.340686][ T17] [ 81.342997][ T17] The buggy address belongs to the object at ffff8881d2e01100 [ 81.342997][ T17] which belongs to the cache kmalloc-4k of size 4096 [ 81.357026][ T17] The buggy address is located 0 bytes inside of [ 81.357026][ T17] 4096-byte region [ffff8881d2e01100, ffff8881d2e02100) [ 81.370201][ T17] The buggy address belongs to the page: [ 81.375833][ T17] page:ffffea00074b8000 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 81.386743][ T17] flags: 0x200000000010200(slab|head) [ 81.392097][ T17] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 81.400657][ T17] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 81.409215][ T17] page dumped because: kasan: bad access detected [ 81.415597][ T17] [ 81.417899][ T17] Memory state around the buggy address: [ 81.423519][ T17] ffff8881d2e01000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 81.431560][ T17] ffff8881d2e01080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 81.439600][ T17] >ffff8881d2e01100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 81.447635][ T17] ^ [ 81.451680][ T17] ffff8881d2e01180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 81.459718][ T17] ffff8881d2e01200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 81.467756][ T17] ================================================================== [ 81.475801][ T17] Disabling lock debugging due to kernel taint [ 81.482158][ T17] Kernel panic - not syncing: panic_on_warn set ... [ 81.488759][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Tainted: G B 5.3.0+ #0 executing program [ 81.491833][ T12] usb 6-1: USB disconnect, device number 2 [ 81.497506][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 81.497522][ T17] Workqueue: usb_hub_wq hub_event [ 81.497527][ T17] Call Trace: [ 81.497542][ T17] dump_stack+0xca/0x13e [ 81.497552][ T17] panic+0x2a3/0x6da [ 81.497566][ T17] ? add_taint.cold+0x16/0x16 [ 81.503407][ T1730] usb 2-1: USB disconnect, device number 2 [ 81.513404][ T17] ? disconnect_rio+0x12b/0x1b0 [ 81.513416][ T17] ? trace_hardirqs_on+0x55/0x1e0 executing program executing program executing program [ 81.513426][ T17] ? disconnect_rio+0x12b/0x1b0 [ 81.513436][ T17] end_report+0x43/0x49 [ 81.513451][ T17] kasan_report_invalid_free+0x7d/0xa0 [ 81.518503][ T1729] usb 3-1: USB disconnect, device number 2 [ 81.521714][ T17] ? disconnect_rio+0x12b/0x1b0 [ 81.526763][ T102] usb 5-1: USB disconnect, device number 2 [ 81.529809][ T17] __kasan_slab_free+0x162/0x180 [ 81.529822][ T17] ? disconnect_rio+0x12b/0x1b0 [ 81.529831][ T17] kfree+0xe4/0x2f0 [ 81.529844][ T17] disconnect_rio+0x12b/0x1b0 [ 81.540724][ T5] usb 1-1: Using ep0 maxpacket: 16 [ 81.545206][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 81.545218][ T17] ? usb_autoresume_device+0x60/0x60 [ 81.545234][ T17] device_release_driver_internal+0x42f/0x500 [ 81.620877][ T17] bus_remove_device+0x2dc/0x4a0 [ 81.625793][ T17] device_del+0x420/0xb10 [ 81.630101][ T17] ? __device_links_no_driver+0x240/0x240 [ 81.635797][ T17] ? lockdep_hardirqs_on+0x379/0x580 [ 81.641058][ T17] ? remove_intf_ep_devs+0x13f/0x1d0 [ 81.646316][ T17] usb_disable_device+0x211/0x690 [ 81.651331][ T17] usb_disconnect+0x284/0x8d0 [ 81.656038][ T17] hub_event+0x1454/0x3640 [ 81.660433][ T17] ? find_held_lock+0x2d/0x110 [ 81.665172][ T17] ? mark_held_locks+0xe0/0xe0 [ 81.667348][ T5] usb 1-1: config 0 has an invalid interface number: 133 but max is 0 [ 81.669910][ T17] ? hub_port_debounce+0x260/0x260 [ 81.669924][ T17] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 81.669934][ T17] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 81.669949][ T17] process_one_work+0x92b/0x1530 [ 81.678645][ T5] usb 1-1: config 0 has no interface number 0 [ 81.683696][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 81.689954][ T5] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 81.694483][ T17] ? do_raw_spin_lock+0x11a/0x280 [ 81.694496][ T17] worker_thread+0x96/0xe20 [ 81.694510][ T17] ? process_one_work+0x1530/0x1530 [ 81.699470][ T5] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 81.705566][ T17] kthread+0x318/0x420 [ 81.714650][ T5] usb 1-1: config 0 descriptor?? [ 81.719902][ T17] ? kthread_create_on_node+0xf0/0xf0 [ 81.719915][ T17] ret_from_fork+0x24/0x30 [ 81.720551][ T17] Kernel Offset: disabled [ 81.766091][ T17] Rebooting in 86400 seconds..