[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[ 14.110692][ T1661] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 15.206241][ C1] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.72' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 39.815918][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 39.815926][ T12] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 39.831031][ T102] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 39.846356][ T17] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 39.853879][ T78] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 39.861519][ T1729] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 40.065861][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 40.075984][ T12] usb 6-1: Using ep0 maxpacket: 8 [ 40.081156][ T102] usb 2-1: Using ep0 maxpacket: 8 [ 40.105949][ T78] usb 5-1: Using ep0 maxpacket: 8 [ 40.111094][ T17] usb 4-1: Using ep0 maxpacket: 8 [ 40.116556][ T1729] usb 3-1: Using ep0 maxpacket: 8 [ 40.196039][ T12] usb 6-1: config 0 has an invalid interface number: 67 but max is 0 [ 40.196070][ T83] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 40.196094][ T83] usb 1-1: config 0 has no interface number 0 [ 40.204204][ T12] usb 6-1: config 0 has no interface number 0 [ 40.212633][ T83] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 40.218652][ T102] usb 2-1: config 0 has an invalid interface number: 67 but max is 0 [ 40.224502][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 40.233521][ T102] usb 2-1: config 0 has no interface number 0 [ 40.233794][ T102] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 40.244214][ T83] usb 1-1: config 0 descriptor?? [ 40.249847][ T102] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 40.253413][ T12] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 40.256284][ T78] usb 5-1: config 0 has an invalid interface number: 67 but max is 0 [ 40.265193][ T12] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 40.266932][ T12] usb 6-1: config 0 descriptor?? [ 40.270266][ T78] usb 5-1: config 0 has no interface number 0 [ 40.285378][ T102] usb 2-1: config 0 descriptor?? [ 40.288900][ T17] usb 4-1: config 0 has an invalid interface number: 67 but max is 0 [ 40.288912][ T17] usb 4-1: config 0 has no interface number 0 [ 40.288941][ T17] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 40.337537][ T12] rio500 6-1:0.67: USB Rio found at address 2 [ 40.344124][ T17] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 40.354973][ T102] rio500 2-1:0.67: USB Rio found at address 2 [ 40.358231][ T1729] usb 3-1: config 0 has an invalid interface number: 67 but max is 0 [ 40.358242][ T1729] usb 3-1: config 0 has no interface number 0 [ 40.358270][ T1729] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 40.387531][ T1729] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 40.396290][ T78] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 40.405337][ T78] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 40.413733][ T1729] usb 3-1: config 0 descriptor?? [ 40.419521][ T78] usb 5-1: config 0 descriptor?? [ 40.425075][ T17] usb 4-1: config 0 descriptor?? [ 40.431388][ T83] rio500 1-1:0.67: Second USB Rio at address 2 refused [ 40.438712][ T83] rio500: probe of 1-1:0.67 failed with error -16 [ 40.467338][ T1729] rio500 3-1:0.67: Second USB Rio at address 2 refused [ 40.474268][ T1729] rio500: probe of 3-1:0.67 failed with error -16 [ 40.482001][ T78] rio500 5-1:0.67: Second USB Rio at address 2 refused [ 40.490274][ T17] rio500 4-1:0.67: Second USB Rio at address 2 refused [ 40.497254][ T78] rio500: probe of 5-1:0.67 failed with error -16 [ 40.505030][ T17] rio500: probe of 4-1:0.67 failed with error -16 executing program executing program [ 40.554812][ T12] usb 6-1: USB disconnect, device number 2 [ 40.555162][ T17] usb 2-1: USB disconnect, device number 2 [ 40.568572][ T12] rio500 6-1:0.67: USB Rio disconnected. [ 40.574842][ T17] ================================================================== [ 40.582992][ T17] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 40.591302][ T17] [ 40.593661][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Not tainted 5.3.0+ #0 executing program [ 40.600652][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 40.610693][ T17] Workqueue: usb_hub_wq hub_event [ 40.615688][ T17] Call Trace: [ 40.618959][ T17] dump_stack+0xca/0x13e [ 40.623184][ T17] print_address_description+0x6a/0x32c [ 40.628714][ T17] ? disconnect_rio+0x12b/0x1b0 [ 40.631583][ T102] usb 1-1: USB disconnect, device number 2 [ 40.633558][ T17] kasan_report_invalid_free+0x61/0xa0 [ 40.644789][ T17] ? disconnect_rio+0x12b/0x1b0 [ 40.649643][ T17] __kasan_slab_free+0x162/0x180 [ 40.654577][ T17] ? disconnect_rio+0x12b/0x1b0 [ 40.659410][ T17] kfree+0xe4/0x2f0 [ 40.663196][ T17] disconnect_rio+0x12b/0x1b0 [ 40.667853][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 40.673029][ T17] ? usb_autoresume_device+0x60/0x60 [ 40.678306][ T17] device_release_driver_internal+0x42f/0x500 [ 40.684348][ T17] bus_remove_device+0x2dc/0x4a0 [ 40.689277][ T17] device_del+0x420/0xb10 [ 40.690397][ T1732] usb 4-1: USB disconnect, device number 2 [ 40.693617][ T17] ? __device_links_no_driver+0x240/0x240 executing program [ 40.693631][ T17] ? lockdep_hardirqs_on+0x379/0x580 [ 40.693642][ T17] ? remove_intf_ep_devs+0x13f/0x1d0 [ 40.693652][ T17] usb_disable_device+0x211/0x690 [ 40.693661][ T17] usb_disconnect+0x284/0x8d0 [ 40.693670][ T17] hub_event+0x1454/0x3640 [ 40.693681][ T17] ? find_held_lock+0x2d/0x110 [ 40.693691][ T17] ? mark_held_locks+0xe0/0xe0 [ 40.693699][ T17] ? hub_port_debounce+0x260/0x260 [ 40.693712][ T17] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 40.693727][ T17] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 40.693741][ T17] process_one_work+0x92b/0x1530 [ 40.693751][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 40.693760][ T17] ? do_raw_spin_lock+0x11a/0x280 [ 40.693772][ T17] worker_thread+0x96/0xe20 [ 40.693782][ T17] ? process_one_work+0x1530/0x1530 [ 40.693796][ T17] kthread+0x318/0x420 [ 40.784221][ T17] ? kthread_create_on_node+0xf0/0xf0 [ 40.789585][ T17] ret_from_fork+0x24/0x30 [ 40.793983][ T17] [ 40.796297][ T17] Allocated by task 12: [ 40.800432][ T17] save_stack+0x1b/0x80 [ 40.804563][ T17] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 40.810171][ T17] probe_rio+0x135/0x248 [ 40.814400][ T17] usb_probe_interface+0x305/0x7a0 [ 40.819485][ T17] really_probe+0x281/0x6d0 [ 40.823972][ T17] driver_probe_device+0x101/0x1b0 [ 40.829056][ T17] __device_attach_driver+0x1c2/0x220 [ 40.834402][ T17] bus_for_each_drv+0x162/0x1e0 [ 40.839232][ T17] __device_attach+0x217/0x360 [ 40.843988][ T17] bus_probe_device+0x1e4/0x290 [ 40.848827][ T17] device_add+0xae6/0x16f0 [ 40.853231][ T17] usb_set_configuration+0xdf6/0x1670 [ 40.858576][ T17] generic_probe+0x9d/0xd5 [ 40.862983][ T17] usb_probe_device+0x99/0x100 [ 40.867721][ T17] really_probe+0x281/0x6d0 [ 40.872196][ T17] driver_probe_device+0x101/0x1b0 [ 40.877292][ T17] __device_attach_driver+0x1c2/0x220 [ 40.882635][ T17] bus_for_each_drv+0x162/0x1e0 [ 40.887457][ T17] __device_attach+0x217/0x360 [ 40.892193][ T17] bus_probe_device+0x1e4/0x290 [ 40.897024][ T17] device_add+0xae6/0x16f0 [ 40.901414][ T17] usb_new_device.cold+0x6a4/0xe79 [ 40.906497][ T17] hub_event+0x1b5c/0x3640 [ 40.910887][ T17] process_one_work+0x92b/0x1530 [ 40.915801][ T17] worker_thread+0x96/0xe20 [ 40.920299][ T17] kthread+0x318/0x420 [ 40.924345][ T17] ret_from_fork+0x24/0x30 [ 40.928727][ T17] [ 40.931031][ T17] Freed by task 12: [ 40.934819][ T17] save_stack+0x1b/0x80 [ 40.935862][ T12] usb 6-1: new high-speed USB device number 3 using dummy_hcd [ 40.938958][ T17] __kasan_slab_free+0x130/0x180 [ 40.938966][ T17] kfree+0xe4/0x2f0 [ 40.938977][ T17] disconnect_rio+0x12b/0x1b0 [ 40.938988][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 40.939000][ T17] device_release_driver_internal+0x42f/0x500 [ 40.939010][ T17] bus_remove_device+0x2dc/0x4a0 [ 40.939019][ T17] device_del+0x420/0xb10 [ 40.939029][ T17] usb_disable_device+0x211/0x690 [ 40.939036][ T17] usb_disconnect+0x284/0x8d0 [ 40.939044][ T17] hub_event+0x1454/0x3640 [ 40.939055][ T17] process_one_work+0x92b/0x1530 [ 40.939064][ T17] worker_thread+0x96/0xe20 [ 40.939073][ T17] kthread+0x318/0x420 [ 40.939085][ T17] ret_from_fork+0x24/0x30 [ 40.939147][ T17] [ 41.014653][ T17] The buggy address belongs to the object at ffff8881d2e5d500 [ 41.014653][ T17] which belongs to the cache kmalloc-4k of size 4096 [ 41.028709][ T17] The buggy address is located 0 bytes inside of [ 41.028709][ T17] 4096-byte region [ffff8881d2e5d500, ffff8881d2e5e500) [ 41.041863][ T17] The buggy address belongs to the page: [ 41.045871][ T102] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 41.047475][ T17] page:ffffea00074b9600 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 41.047489][ T17] flags: 0x200000000010200(slab|head) [ 41.047505][ T17] raw: 0200000000010200 0000000000000000 0000000200000001 ffff8881da00c280 [ 41.047517][ T17] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 41.088341][ T17] page dumped because: kasan: bad access detected [ 41.094731][ T17] [ 41.097044][ T17] Memory state around the buggy address: [ 41.102656][ T17] ffff8881d2e5d400: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.105887][ T1732] usb 4-1: new high-speed USB device number 3 using dummy_hcd [ 41.110794][ T17] ffff8881d2e5d480: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 41.110803][ T17] >ffff8881d2e5d500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.110808][ T17] ^ [ 41.110816][ T17] ffff8881d2e5d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.110825][ T17] ffff8881d2e5d600: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.110829][ T17] ================================================================== [ 41.110837][ T17] Disabling lock debugging due to kernel taint [ 41.168756][ T17] Kernel panic - not syncing: panic_on_warn set ... [ 41.175351][ T17] CPU: 1 PID: 17 Comm: kworker/1:0 Tainted: G B 5.3.0+ #0 [ 41.183735][ T17] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 41.193774][ T17] Workqueue: usb_hub_wq hub_event [ 41.198776][ T17] Call Trace: [ 41.202045][ T17] dump_stack+0xca/0x13e [ 41.206261][ T17] panic+0x2a3/0x6da [ 41.210135][ T17] ? add_taint.cold+0x16/0x16 [ 41.214786][ T17] ? disconnect_rio+0x12b/0x1b0 [ 41.219623][ T17] ? trace_hardirqs_on+0x55/0x1e0 [ 41.224622][ T17] ? disconnect_rio+0x12b/0x1b0 [ 41.229448][ T17] end_report+0x43/0x49 [ 41.233579][ T17] kasan_report_invalid_free+0x7d/0xa0 [ 41.239013][ T17] ? disconnect_rio+0x12b/0x1b0 [ 41.243841][ T17] __kasan_slab_free+0x162/0x180 [ 41.248755][ T17] ? disconnect_rio+0x12b/0x1b0 [ 41.253578][ T17] kfree+0xe4/0x2f0 [ 41.257363][ T17] disconnect_rio+0x12b/0x1b0 [ 41.262026][ T17] usb_unbind_interface+0x1bd/0x8a0 [ 41.267206][ T17] ? usb_autoresume_device+0x60/0x60 [ 41.272469][ T17] device_release_driver_internal+0x42f/0x500 [ 41.278517][ T17] bus_remove_device+0x2dc/0x4a0 [ 41.283430][ T17] device_del+0x420/0xb10 [ 41.287743][ T17] ? __device_links_no_driver+0x240/0x240 [ 41.293437][ T17] ? lockdep_hardirqs_on+0x379/0x580 [ 41.298696][ T17] ? remove_intf_ep_devs+0x13f/0x1d0 [ 41.303963][ T17] usb_disable_device+0x211/0x690 [ 41.308972][ T17] usb_disconnect+0x284/0x8d0 [ 41.313621][ T17] hub_event+0x1454/0x3640 [ 41.318012][ T17] ? find_held_lock+0x2d/0x110 [ 41.322748][ T17] ? mark_held_locks+0xe0/0xe0 [ 41.327483][ T17] ? hub_port_debounce+0x260/0x260 [ 41.333188][ T17] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 41.338709][ T17] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 41.343969][ T17] process_one_work+0x92b/0x1530 [ 41.348892][ T17] ? pwq_dec_nr_in_flight+0x310/0x310 [ 41.354239][ T17] ? do_raw_spin_lock+0x11a/0x280 [ 41.359240][ T17] worker_thread+0x96/0xe20 [ 41.363725][ T17] ? process_one_work+0x1530/0x1530 [ 41.368896][ T17] kthread+0x318/0x420 [ 41.372938][ T17] ? kthread_create_on_node+0xf0/0xf0 [ 41.378302][ T17] ret_from_fork+0x24/0x30 [ 41.383262][ T17] Kernel Offset: disabled [ 41.387570][ T17] Rebooting in 86400 seconds..