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 '10.128.0.235' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 57.010506][ T17] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 57.010513][ T12] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 57.010806][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 57.018624][ T5] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 57.026567][ T78] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 57.034263][ T1741] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 57.260518][ T17] usb 5-1: Using ep0 maxpacket: 16 [ 57.270492][ T12] usb 4-1: Using ep0 maxpacket: 16 [ 57.279414][ T1741] usb 6-1: Using ep0 maxpacket: 16 [ 57.287769][ T5] usb 2-1: Using ep0 maxpacket: 16 [ 57.300586][ T83] usb 1-1: Using ep0 maxpacket: 16 [ 57.306253][ T78] usb 3-1: Using ep0 maxpacket: 16 [ 57.380690][ T17] usb 5-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.390265][ T17] usb 5-1: config 0 has no interface number 0 [ 57.396607][ T17] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.406121][ T17] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.415631][ T17] usb 5-1: config 0 descriptor?? [ 57.420662][ T1741] usb 6-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.420682][ T1741] usb 6-1: config 0 has no interface number 0 [ 57.420715][ T1741] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.420727][ T1741] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.421386][ T12] usb 4-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.429157][ T83] usb 1-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.435454][ T12] usb 4-1: config 0 has no interface number 0 [ 57.436148][ T1741] usb 6-1: config 0 descriptor?? [ 57.444541][ T83] usb 1-1: config 0 has no interface number 0 [ 57.444661][ T78] usb 3-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.458761][ T5] usb 2-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.465642][ T78] usb 3-1: config 0 has no interface number 0 [ 57.466157][ T83] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.480456][ T5] usb 2-1: config 0 has no interface number 0 [ 57.481023][ T12] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.488671][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.488931][ T78] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.495828][ T12] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.496365][ T5] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.504375][ T78] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.515177][ T5] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.533668][ T17] rio500 5-1:0.133: USB Rio found at address 2 [ 57.539886][ T12] usb 4-1: config 0 descriptor?? [ 57.552605][ T83] usb 1-1: config 0 descriptor?? [ 57.559092][ T1741] rio500 6-1:0.133: Second USB Rio at address 2 refused [ 57.568993][ T78] usb 3-1: config 0 descriptor?? [ 57.605010][ T1741] rio500: probe of 6-1:0.133 failed with error -16 [ 57.641756][ T83] rio500 1-1:0.133: Second USB Rio at address 2 refused [ 57.652013][ T5] usb 2-1: config 0 descriptor?? [ 57.685385][ T78] rio500 3-1:0.133: Second USB Rio at address 2 refused [ 57.691833][ T12] rio500 4-1:0.133: Second USB Rio at address 2 refused [ 57.693579][ T78] rio500: probe of 3-1:0.133 failed with error -16 [ 57.704016][ T5] rio500 2-1:0.133: Second USB Rio at address 2 refused [ 57.711209][ T83] rio500: probe of 1-1:0.133 failed with error -16 executing program executing program [ 57.738760][ T83] usb 5-1: USB disconnect, device number 2 [ 57.739913][ T12] rio500: probe of 4-1:0.133 failed with error -16 [ 57.759010][ T83] rio500 5-1:0.133: USB Rio disconnected. [ 57.761117][ T5] rio500: probe of 2-1:0.133 failed with error -16 [ 57.779355][ T5] usb 6-1: USB disconnect, device number 2 executing program executing program executing program executing program [ 57.852989][ T78] usb 1-1: USB disconnect, device number 2 [ 57.862146][ T12] usb 3-1: USB disconnect, device number 2 [ 57.892050][ T17] usb 4-1: USB disconnect, device number 2 [ 57.905449][ T1741] usb 2-1: USB disconnect, device number 2 [ 58.130465][ T5] usb 6-1: new high-speed USB device number 3 using dummy_hcd [ 58.150534][ T83] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 58.220468][ T12] usb 3-1: new high-speed USB device number 3 using dummy_hcd [ 58.270475][ T78] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 58.310467][ T1741] usb 2-1: new high-speed USB device number 3 using dummy_hcd [ 58.310475][ T17] usb 4-1: new high-speed USB device number 3 using dummy_hcd [ 58.380506][ T5] usb 6-1: Using ep0 maxpacket: 16 [ 58.400465][ T83] usb 5-1: Using ep0 maxpacket: 16 [ 58.470458][ T12] usb 3-1: Using ep0 maxpacket: 16 [ 58.501057][ T5] usb 6-1: config 0 has an invalid interface number: 133 but max is 0 [ 58.512021][ T5] usb 6-1: config 0 has no interface number 0 [ 58.524921][ T5] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 58.530646][ T83] usb 5-1: config 0 has an invalid interface number: 133 but max is 0 [ 58.539298][ T5] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 58.548104][ T83] usb 5-1: config 0 has no interface number 0 [ 58.548551][ T78] usb 1-1: Using ep0 maxpacket: 16 [ 58.558365][ T5] usb 6-1: config 0 descriptor?? [ 58.564325][ T17] usb 4-1: Using ep0 maxpacket: 16 [ 58.568513][ T83] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 58.580626][ T1741] usb 2-1: Using ep0 maxpacket: 16 [ 58.594427][ T83] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 58.605119][ T83] usb 5-1: config 0 descriptor?? [ 58.610852][ T12] usb 3-1: config 0 has an invalid interface number: 133 but max is 0 [ 58.610864][ T12] usb 3-1: config 0 has no interface number 0 [ 58.610897][ T12] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 58.610910][ T12] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 58.615324][ T5] rio500 6-1:0.133: USB Rio found at address 3 [ 58.671961][ T83] rio500 5-1:0.133: USB Rio found at address 3 [ 58.676206][ T12] usb 3-1: config 0 descriptor?? [ 58.721735][ T12] rio500 3-1:0.133: Second USB Rio at address 3 refused [ 58.741460][ T12] rio500: probe of 3-1:0.133 failed with error -16 [ 58.751797][ T78] usb 1-1: config 0 has an invalid interface number: 133 but max is 0 [ 58.760366][ T78] usb 1-1: config 0 has no interface number 0 [ 58.766735][ T17] usb 4-1: config 0 has an invalid interface number: 133 but max is 0 [ 58.774931][ T17] usb 4-1: config 0 has no interface number 0 [ 58.781472][ T17] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 58.793793][ T17] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 58.801983][ T78] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 58.811177][ T78] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 executing program [ 58.820549][ T1741] usb 2-1: config 0 has an invalid interface number: 133 but max is 0 [ 58.821287][ T78] usb 1-1: config 0 descriptor?? [ 58.833602][ T1741] usb 2-1: config 0 has no interface number 0 [ 58.840727][ T17] usb 4-1: config 0 descriptor?? [ 58.858458][ T1741] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 58.871535][ T1741] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 58.883929][ T83] usb 5-1: USB disconnect, device number 3 [ 58.889474][ T12] usb 6-1: USB disconnect, device number 3 [ 58.894821][ T78] rio500 1-1:0.133: Second USB Rio at address 3 refused [ 58.899882][ T1741] usb 2-1: config 0 descriptor?? executing program executing program [ 58.908593][ T17] rio500 4-1:0.133: Second USB Rio at address 3 refused [ 58.916146][ T12] rio500 6-1:0.133: USB Rio disconnected. [ 58.940808][ T83] ================================================================== [ 58.949096][ T83] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 58.958052][ T83] [ 58.960390][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Not tainted 5.3.0+ #0 [ 58.968127][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.980052][ T83] Workqueue: usb_hub_wq hub_event [ 58.985233][ T83] Call Trace: [ 58.988522][ T83] dump_stack+0xca/0x13e [ 58.992783][ T83] print_address_description+0x6a/0x32c [ 58.998318][ T83] ? disconnect_rio+0x12b/0x1b0 [ 59.003159][ T83] kasan_report_invalid_free+0x61/0xa0 [ 59.008600][ T83] ? disconnect_rio+0x12b/0x1b0 [ 59.013426][ T83] __kasan_slab_free+0x162/0x180 [ 59.018357][ T83] ? disconnect_rio+0x12b/0x1b0 [ 59.023189][ T83] kfree+0xe4/0x2f0 [ 59.026973][ T83] disconnect_rio+0x12b/0x1b0 [ 59.031624][ T83] usb_unbind_interface+0x1bd/0x8a0 [ 59.036794][ T83] ? usb_autoresume_device+0x60/0x60 [ 59.042139][ T83] device_release_driver_internal+0x42f/0x500 [ 59.048182][ T83] bus_remove_device+0x2dc/0x4a0 [ 59.053094][ T83] device_del+0x420/0xb10 [ 59.057413][ T83] ? __device_links_no_driver+0x240/0x240 [ 59.063108][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 59.068378][ T83] ? remove_intf_ep_devs+0x13f/0x1d0 [ 59.073636][ T83] usb_disable_device+0x211/0x690 [ 59.078635][ T83] usb_disconnect+0x284/0x8d0 [ 59.083284][ T83] hub_event+0x1454/0x3640 [ 59.087690][ T83] ? find_held_lock+0x2d/0x110 [ 59.092427][ T83] ? mark_held_locks+0xe0/0xe0 [ 59.097171][ T83] ? hub_port_debounce+0x260/0x260 [ 59.102265][ T83] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.107794][ T83] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 59.113063][ T83] process_one_work+0x92b/0x1530 [ 59.117979][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 59.123371][ T83] ? do_raw_spin_lock+0x11a/0x280 [ 59.128378][ T83] worker_thread+0x96/0xe20 [ 59.132859][ T83] ? process_one_work+0x1530/0x1530 [ 59.138033][ T83] kthread+0x318/0x420 [ 59.142076][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 59.147419][ T83] ret_from_fork+0x24/0x30 [ 59.151806][ T83] [ 59.154112][ T83] Allocated by task 5: [ 59.158164][ T83] save_stack+0x1b/0x80 [ 59.162466][ T83] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 59.168075][ T83] probe_rio+0x135/0x248 [ 59.172304][ T83] usb_probe_interface+0x305/0x7a0 [ 59.177406][ T83] really_probe+0x281/0x6d0 [ 59.181880][ T83] driver_probe_device+0x101/0x1b0 [ 59.186964][ T83] __device_attach_driver+0x1c2/0x220 [ 59.192308][ T83] bus_for_each_drv+0x162/0x1e0 [ 59.197137][ T83] __device_attach+0x217/0x360 [ 59.201894][ T83] bus_probe_device+0x1e4/0x290 [ 59.206718][ T83] device_add+0xae6/0x16f0 [ 59.211119][ T83] usb_set_configuration+0xdf6/0x1670 [ 59.216467][ T83] generic_probe+0x9d/0xd5 [ 59.220943][ T83] usb_probe_device+0x99/0x100 [ 59.225680][ T83] really_probe+0x281/0x6d0 [ 59.230157][ T83] driver_probe_device+0x101/0x1b0 [ 59.235240][ T83] __device_attach_driver+0x1c2/0x220 [ 59.240593][ T83] bus_for_each_drv+0x162/0x1e0 [ 59.245442][ T83] __device_attach+0x217/0x360 [ 59.250187][ T83] bus_probe_device+0x1e4/0x290 [ 59.255024][ T83] device_add+0xae6/0x16f0 [ 59.259427][ T83] usb_new_device.cold+0x6a4/0xe79 [ 59.264513][ T83] hub_event+0x1b5c/0x3640 [ 59.268910][ T83] process_one_work+0x92b/0x1530 [ 59.273829][ T83] worker_thread+0x96/0xe20 [ 59.278319][ T83] kthread+0x318/0x420 [ 59.282373][ T83] ret_from_fork+0x24/0x30 [ 59.286755][ T83] [ 59.289061][ T83] Freed by task 12: [ 59.292845][ T83] save_stack+0x1b/0x80 [ 59.296976][ T83] __kasan_slab_free+0x130/0x180 [ 59.301897][ T83] kfree+0xe4/0x2f0 [ 59.305680][ T83] disconnect_rio+0x12b/0x1b0 [ 59.310349][ T83] usb_unbind_interface+0x1bd/0x8a0 [ 59.315531][ T83] device_release_driver_internal+0x42f/0x500 [ 59.321576][ T83] bus_remove_device+0x2dc/0x4a0 [ 59.326496][ T83] device_del+0x420/0xb10 [ 59.330810][ T83] usb_disable_device+0x211/0x690 [ 59.335821][ T83] usb_disconnect+0x284/0x8d0 [ 59.340493][ T83] hub_event+0x1454/0x3640 [ 59.344886][ T83] process_one_work+0x92b/0x1530 [ 59.349800][ T83] worker_thread+0x96/0xe20 [ 59.354277][ T83] kthread+0x318/0x420 [ 59.358325][ T83] ret_from_fork+0x24/0x30 [ 59.362763][ T83] [ 59.365136][ T83] The buggy address belongs to the object at ffff8881d2729100 [ 59.365136][ T83] which belongs to the cache kmalloc-4k of size 4096 [ 59.379219][ T83] The buggy address is located 0 bytes inside of [ 59.379219][ T83] 4096-byte region [ffff8881d2729100, ffff8881d272a100) [ 59.392392][ T83] The buggy address belongs to the page: [ 59.398000][ T83] page:ffffea000749ca00 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 59.408913][ T83] flags: 0x200000000010200(slab|head) [ 59.414263][ T83] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 59.422830][ T83] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 59.431382][ T83] page dumped because: kasan: bad access detected [ 59.437761][ T83] [ 59.440073][ T83] Memory state around the buggy address: [ 59.445687][ T83] ffff8881d2729000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 59.453721][ T83] ffff8881d2729080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 59.461756][ T83] >ffff8881d2729100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.469796][ T83] ^ [ 59.473838][ T83] ffff8881d2729180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.481875][ T83] ffff8881d2729200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 59.489907][ T83] ================================================================== [ 59.497953][ T83] Disabling lock debugging due to kernel taint [ 59.504200][ T83] Kernel panic - not syncing: panic_on_warn set ... [ 59.510796][ T83] CPU: 1 PID: 83 Comm: kworker/1:2 Tainted: G B 5.3.0+ #0 [ 59.519208][ T83] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.529272][ T83] Workqueue: usb_hub_wq hub_event [ 59.534273][ T83] Call Trace: [ 59.537552][ T83] dump_stack+0xca/0x13e [ 59.541770][ T83] panic+0x2a3/0x6da [ 59.545823][ T83] ? add_taint.cold+0x16/0x16 [ 59.550483][ T83] ? disconnect_rio+0x12b/0x1b0 [ 59.555309][ T83] ? trace_hardirqs_on+0x55/0x1e0 [ 59.560315][ T83] ? disconnect_rio+0x12b/0x1b0 [ 59.565143][ T83] end_report+0x43/0x49 [ 59.569275][ T83] kasan_report_invalid_free+0x7d/0xa0 [ 59.574710][ T83] ? disconnect_rio+0x12b/0x1b0 [ 59.579552][ T83] __kasan_slab_free+0x162/0x180 [ 59.584475][ T83] ? disconnect_rio+0x12b/0x1b0 [ 59.589299][ T83] kfree+0xe4/0x2f0 [ 59.593095][ T83] disconnect_rio+0x12b/0x1b0 [ 59.597748][ T83] usb_unbind_interface+0x1bd/0x8a0 [ 59.602932][ T83] ? usb_autoresume_device+0x60/0x60 [ 59.608197][ T83] device_release_driver_internal+0x42f/0x500 [ 59.614250][ T83] bus_remove_device+0x2dc/0x4a0 [ 59.619164][ T83] device_del+0x420/0xb10 [ 59.623471][ T83] ? __device_links_no_driver+0x240/0x240 [ 59.629165][ T83] ? lockdep_hardirqs_on+0x379/0x580 [ 59.634424][ T83] ? remove_intf_ep_devs+0x13f/0x1d0 [ 59.639691][ T83] usb_disable_device+0x211/0x690 [ 59.644689][ T83] usb_disconnect+0x284/0x8d0 [ 59.649341][ T83] hub_event+0x1454/0x3640 [ 59.653734][ T83] ? find_held_lock+0x2d/0x110 [ 59.658569][ T83] ? mark_held_locks+0xe0/0xe0 [ 59.663311][ T83] ? hub_port_debounce+0x260/0x260 [ 59.668401][ T83] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 59.673922][ T83] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 59.679192][ T83] process_one_work+0x92b/0x1530 [ 59.684116][ T83] ? pwq_dec_nr_in_flight+0x310/0x310 [ 59.689463][ T83] ? do_raw_spin_lock+0x11a/0x280 [ 59.694464][ T83] worker_thread+0x96/0xe20 [ 59.698945][ T83] ? process_one_work+0x1530/0x1530 [ 59.704115][ T83] kthread+0x318/0x420 [ 59.708157][ T83] ? kthread_create_on_node+0xf0/0xf0 [ 59.713517][ T83] ret_from_fork+0x24/0x30 [ 59.718558][ T83] Kernel Offset: disabled [ 59.722870][ T83] Rebooting in 86400 seconds..