[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[ 14.786710][ T1666] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 15.071372][ C1] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.47' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 64.387806][ T17] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 64.395697][ T83] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 64.397700][ T102] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 64.403662][ T22] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 64.410693][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 64.426039][ T1733] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 64.637891][ T17] usb 2-1: Using ep0 maxpacket: 16 [ 64.667729][ T1733] usb 3-1: Using ep0 maxpacket: 16 [ 64.667734][ T12] usb 1-1: Using ep0 maxpacket: 16 [ 64.667832][ T102] usb 4-1: Using ep0 maxpacket: 16 [ 64.673064][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 64.688853][ T22] usb 5-1: Using ep0 maxpacket: 16 [ 64.767905][ T17] usb 2-1: config 0 has an invalid interface number: 133 but max is 0 [ 64.777271][ T17] usb 2-1: config 0 has no interface number 0 [ 64.783555][ T17] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 64.792675][ T17] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.800840][ T1733] usb 3-1: config 0 has an invalid interface number: 133 but max is 0 [ 64.807937][ T12] usb 1-1: config 0 has an invalid interface number: 133 but max is 0 [ 64.809022][ T1733] usb 3-1: config 0 has no interface number 0 [ 64.809062][ T1733] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 64.817473][ T12] usb 1-1: config 0 has no interface number 0 [ 64.823624][ T1733] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.833073][ T102] usb 4-1: config 0 has an invalid interface number: 133 but max is 0 [ 64.838674][ T22] usb 5-1: config 0 has an invalid interface number: 133 but max is 0 [ 64.846619][ T102] usb 4-1: config 0 has no interface number 0 [ 64.854793][ T22] usb 5-1: config 0 has no interface number 0 [ 64.863467][ T12] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 64.869075][ T83] usb 6-1: config 0 has an invalid interface number: 133 but max is 0 [ 64.875108][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.884146][ T83] usb 6-1: config 0 has no interface number 0 [ 64.892793][ T102] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 64.901859][ T17] usb 2-1: config 0 descriptor?? [ 64.906378][ T102] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.919882][ T1733] usb 3-1: config 0 descriptor?? [ 64.927440][ T12] usb 1-1: config 0 descriptor?? [ 64.928561][ T22] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 64.941404][ T102] usb 4-1: config 0 descriptor?? [ 64.947285][ T22] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.947337][ T83] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 64.947351][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 64.978975][ T17] rio500 2-1:0.133: USB Rio found at address 2 [ 64.979127][ T12] rio500 1-1:0.133: USB Rio found at address 2 [ 64.995944][ T22] usb 5-1: config 0 descriptor?? [ 65.004074][ T83] usb 6-1: config 0 descriptor?? [ 65.009301][ T102] rio500 4-1:0.133: Second USB Rio at address 2 refused [ 65.029142][ T1733] rio500 3-1:0.133: Second USB Rio at address 2 refused [ 65.029436][ T102] rio500: probe of 4-1:0.133 failed with error -16 [ 65.036139][ T1733] rio500: probe of 3-1:0.133 failed with error -16 [ 65.039925][ T22] rio500 5-1:0.133: Second USB Rio at address 2 refused [ 65.058015][ T83] rio500 6-1:0.133: Second USB Rio at address 2 refused [ 65.065033][ T83] rio500: probe of 6-1:0.133 failed with error -16 [ 65.076070][ T22] rio500: probe of 5-1:0.133 failed with error -16 executing program executing program [ 65.154999][ T102] usb 2-1: USB disconnect, device number 2 [ 65.162687][ T102] rio500 2-1:0.133: USB Rio disconnected. [ 65.179498][ T12] usb 1-1: USB disconnect, device number 2 [ 65.186275][ T12] ================================================================== [ 65.194445][ T12] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 65.202746][ T12] executing program [ 65.205062][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.4.0-rc1+ #0 [ 65.212444][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.222600][ T12] Workqueue: usb_hub_wq hub_event [ 65.227597][ T12] Call Trace: [ 65.229248][ T22] usb 3-1: USB disconnect, device number 2 [ 65.230968][ T12] dump_stack+0xca/0x13e [ 65.240118][ T83] usb 5-1: USB disconnect, device number 2 [ 65.240991][ T12] print_address_description.constprop.0+0x36/0x50 executing program [ 65.253264][ T12] ? disconnect_rio+0x12b/0x1b0 [ 65.258109][ T12] kasan_report_invalid_free+0x61/0xa0 [ 65.263563][ T12] ? disconnect_rio+0x12b/0x1b0 [ 65.268417][ T12] __kasan_slab_free+0x162/0x180 [ 65.273351][ T12] ? disconnect_rio+0x12b/0x1b0 [ 65.278188][ T12] kfree+0xe4/0x2f0 [ 65.281982][ T12] disconnect_rio+0x12b/0x1b0 [ 65.286635][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 65.291808][ T12] ? usb_autoresume_device+0x60/0x60 [ 65.297106][ T12] device_release_driver_internal+0x42f/0x500 [ 65.303165][ T12] bus_remove_device+0x2dc/0x4a0 [ 65.308079][ T12] device_del+0x420/0xb20 [ 65.312394][ T12] ? __device_link_del+0x2f0/0x2f0 [ 65.317487][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 65.322761][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 65.328030][ T12] usb_disable_device+0x211/0x690 [ 65.333039][ T12] usb_disconnect+0x284/0x8d0 [ 65.337702][ T12] hub_event+0x1454/0x3640 [ 65.342135][ T12] ? find_held_lock+0x2d/0x110 [ 65.346890][ T12] ? mark_held_locks+0xe0/0xe0 [ 65.351633][ T12] ? hub_port_debounce+0x260/0x260 [ 65.356723][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.362338][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 65.367611][ T12] process_one_work+0x92b/0x1530 [ 65.372535][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.377883][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 65.382896][ T12] worker_thread+0x96/0xe20 [ 65.387378][ T12] ? process_one_work+0x1530/0x1530 [ 65.392551][ T12] kthread+0x318/0x420 [ 65.396621][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 65.401968][ T12] ret_from_fork+0x24/0x30 [ 65.406366][ T12] [ 65.408676][ T12] Allocated by task 12: [ 65.412811][ T12] save_stack+0x1b/0x80 [ 65.416947][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 65.422568][ T12] probe_rio+0x135/0x248 [ 65.426787][ T12] usb_probe_interface+0x305/0x7a0 [ 65.431884][ T12] really_probe+0x281/0x6d0 [ 65.436383][ T12] driver_probe_device+0x104/0x210 [ 65.441480][ T12] __device_attach_driver+0x1c2/0x220 [ 65.447114][ T12] bus_for_each_drv+0x162/0x1e0 [ 65.452153][ T12] __device_attach+0x217/0x360 [ 65.456908][ T12] bus_probe_device+0x1e4/0x290 [ 65.461747][ T12] device_add+0xae6/0x16f0 [ 65.466148][ T12] usb_set_configuration+0xdf6/0x1670 [ 65.471554][ T12] generic_probe+0x9d/0xd5 [ 65.475945][ T12] usb_probe_device+0x99/0x100 [ 65.480731][ T12] really_probe+0x281/0x6d0 [ 65.485227][ T12] driver_probe_device+0x104/0x210 [ 65.490410][ T12] __device_attach_driver+0x1c2/0x220 [ 65.495759][ T12] bus_for_each_drv+0x162/0x1e0 [ 65.500581][ T12] __device_attach+0x217/0x360 [ 65.505357][ T12] bus_probe_device+0x1e4/0x290 [ 65.510481][ T12] device_add+0xae6/0x16f0 [ 65.515018][ T12] usb_new_device.cold+0x6a4/0xe79 [ 65.520127][ T12] hub_event+0x1b5c/0x3640 [ 65.524526][ T12] process_one_work+0x92b/0x1530 [ 65.529442][ T12] worker_thread+0x96/0xe20 [ 65.534010][ T12] kthread+0x318/0x420 [ 65.538055][ T12] ret_from_fork+0x24/0x30 [ 65.542442][ T12] [ 65.544760][ T12] Freed by task 102: [ 65.548632][ T12] save_stack+0x1b/0x80 [ 65.552764][ T12] __kasan_slab_free+0x130/0x180 [ 65.557686][ T12] kfree+0xe4/0x2f0 [ 65.561481][ T12] disconnect_rio+0x12b/0x1b0 [ 65.566143][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 65.571318][ T12] device_release_driver_internal+0x42f/0x500 [ 65.577368][ T12] bus_remove_device+0x2dc/0x4a0 [ 65.582279][ T12] device_del+0x420/0xb20 [ 65.586587][ T12] usb_disable_device+0x211/0x690 [ 65.591587][ T12] usb_disconnect+0x284/0x8d0 [ 65.596237][ T12] hub_event+0x1454/0x3640 [ 65.600627][ T12] process_one_work+0x92b/0x1530 [ 65.605544][ T12] worker_thread+0x96/0xe20 [ 65.610023][ T12] kthread+0x318/0x420 [ 65.614071][ T12] ret_from_fork+0x24/0x30 [ 65.618454][ T12] [ 65.620764][ T12] The buggy address belongs to the object at ffff8881d3264400 [ 65.620764][ T12] which belongs to the cache kmalloc-4k of size 4096 [ 65.634809][ T12] The buggy address is located 0 bytes inside of [ 65.634809][ T12] 4096-byte region [ffff8881d3264400, ffff8881d3265400) [ 65.647965][ T12] The buggy address belongs to the page: [ 65.653604][ T12] page:ffffea00074c9800 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 65.665131][ T12] flags: 0x200000000010200(slab|head) [ 65.670501][ T12] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 65.679080][ T12] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 65.687650][ T12] page dumped because: kasan: bad access detected [ 65.694043][ T12] [ 65.696347][ T12] Memory state around the buggy address: [ 65.701952][ T12] ffff8881d3264300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.709995][ T12] ffff8881d3264380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.718042][ T12] >ffff8881d3264400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.726075][ T12] ^ [ 65.730116][ T12] ffff8881d3264480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.738164][ T12] ffff8881d3264500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 65.746199][ T12] ================================================================== executing program executing program [ 65.754238][ T12] Disabling lock debugging due to kernel taint [ 65.760453][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 65.765662][ T17] usb 4-1: USB disconnect, device number 2 [ 65.767054][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.4.0-rc1+ #0 [ 65.772940][ T1733] usb 6-1: USB disconnect, device number 2 [ 65.781560][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.781574][ T12] Workqueue: usb_hub_wq hub_event [ 65.781579][ T12] Call Trace: [ 65.781598][ T12] dump_stack+0xca/0x13e [ 65.809893][ T12] panic+0x2a3/0x6da [ 65.813773][ T12] ? add_taint.cold+0x16/0x16 [ 65.818426][ T12] ? disconnect_rio+0x12b/0x1b0 [ 65.823247][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 65.828251][ T12] ? disconnect_rio+0x12b/0x1b0 [ 65.833072][ T12] end_report+0x43/0x49 [ 65.837199][ T12] kasan_report_invalid_free+0x7d/0xa0 [ 65.842629][ T12] ? disconnect_rio+0x12b/0x1b0 [ 65.847451][ T12] __kasan_slab_free+0x162/0x180 [ 65.852358][ T12] ? disconnect_rio+0x12b/0x1b0 [ 65.857178][ T12] kfree+0xe4/0x2f0 [ 65.860962][ T12] disconnect_rio+0x12b/0x1b0 [ 65.865613][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 65.870782][ T12] ? usb_autoresume_device+0x60/0x60 [ 65.876039][ T12] device_release_driver_internal+0x42f/0x500 [ 65.882091][ T12] bus_remove_device+0x2dc/0x4a0 [ 65.886999][ T12] device_del+0x420/0xb20 [ 65.891303][ T12] ? __device_link_del+0x2f0/0x2f0 [ 65.896388][ T12] ? lockdep_hardirqs_on+0x382/0x580 [ 65.901644][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 65.906903][ T12] usb_disable_device+0x211/0x690 [ 65.911899][ T12] usb_disconnect+0x284/0x8d0 [ 65.916549][ T12] hub_event+0x1454/0x3640 [ 65.920950][ T12] ? find_held_lock+0x2d/0x110 [ 65.925711][ T12] ? mark_held_locks+0xe0/0xe0 [ 65.930459][ T12] ? hub_port_debounce+0x260/0x260 [ 65.935543][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 65.941059][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 65.946316][ T12] process_one_work+0x92b/0x1530 [ 65.951227][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 65.956571][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 65.961568][ T12] worker_thread+0x96/0xe20 [ 65.966045][ T12] ? process_one_work+0x1530/0x1530 [ 65.971217][ T12] kthread+0x318/0x420 [ 65.975260][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 65.980786][ T12] ret_from_fork+0x24/0x30 [ 65.985793][ T12] Kernel Offset: disabled [ 65.990119][ T12] Rebooting in 86400 seconds..