[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[ 13.824462][ T1665] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 18.895216][ C1] random: crng init done Warning: Permanently added '10.128.0.127' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program [ 68.842654][ T17] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 68.842662][ T102] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 68.842945][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 68.850298][ T12] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 68.863113][ T22] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 68.865558][ T5] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 69.082619][ T17] usb 4-1: Using ep0 maxpacket: 8 [ 69.092872][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 69.112658][ T22] usb 2-1: Using ep0 maxpacket: 8 [ 69.122610][ T102] usb 5-1: Using ep0 maxpacket: 8 [ 69.127796][ T12] usb 6-1: Using ep0 maxpacket: 8 [ 69.132929][ T5] usb 3-1: Using ep0 maxpacket: 8 [ 69.202663][ T17] usb 4-1: config 0 has an invalid interface number: 67 but max is 0 [ 69.210878][ T17] usb 4-1: config 0 has no interface number 0 [ 69.217134][ T83] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 69.225229][ T83] usb 1-1: config 0 has no interface number 0 [ 69.231300][ T17] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 69.240383][ T17] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 69.248402][ T22] usb 2-1: config 0 has an invalid interface number: 67 but max is 0 [ 69.256504][ T22] usb 2-1: config 0 has no interface number 0 [ 69.262630][ T83] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 69.262708][ T102] usb 5-1: config 0 has an invalid interface number: 67 but max is 0 [ 69.271635][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 69.272483][ T22] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 69.280748][ T102] usb 5-1: config 0 has no interface number 0 [ 69.280822][ T12] usb 6-1: config 0 has an invalid interface number: 67 but max is 0 [ 69.288740][ T22] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 69.297750][ T12] usb 6-1: config 0 has no interface number 0 [ 69.305995][ T17] usb 4-1: config 0 descriptor?? [ 69.311881][ T5] usb 3-1: config 0 has an invalid interface number: 67 but max is 0 [ 69.320166][ T83] usb 1-1: config 0 descriptor?? [ 69.325947][ T5] usb 3-1: config 0 has no interface number 0 [ 69.337188][ T22] usb 2-1: config 0 descriptor?? [ 69.341637][ T102] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 69.363928][ T102] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 69.372019][ T12] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 69.381080][ T12] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 69.387425][ T83] rio500 1-1:0.67: USB Rio found at address 2 [ 69.390005][ T5] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 69.399616][ T22] rio500 2-1:0.67: USB Rio found at address 2 [ 69.404695][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 69.417743][ T5] usb 3-1: config 0 descriptor?? [ 69.419922][ T17] rio500 4-1:0.67: USB Rio found at address 2 [ 69.423979][ T12] usb 6-1: config 0 descriptor?? [ 69.435447][ T102] usb 5-1: config 0 descriptor?? [ 69.484282][ T102] rio500 5-1:0.67: Second USB Rio at address 2 refused [ 69.491304][ T102] rio500: probe of 5-1:0.67 failed with error -16 [ 69.513809][ T12] rio500 6-1:0.67: Second USB Rio at address 2 refused [ 69.520739][ T12] rio500: probe of 6-1:0.67 failed with error -16 [ 69.528395][ T5] rio500 3-1:0.67: Second USB Rio at address 2 refused [ 69.535386][ T5] rio500: probe of 3-1:0.67 failed with error -16 executing program executing program executing program [ 69.584605][ T12] usb 4-1: USB disconnect, device number 2 [ 69.584665][ T22] usb 1-1: USB disconnect, device number 2 [ 69.594024][ T12] rio500 4-1:0.67: USB Rio disconnected. [ 69.607201][ T5] usb 2-1: USB disconnect, device number 2 [ 69.614606][ T5] ================================================================== [ 69.622756][ T5] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 69.631049][ T5] [ 69.633359][ T5] CPU: 0 PID: 5 Comm: kworker/0:0 Not tainted 5.3.0+ #0 [ 69.640288][ T5] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 69.650362][ T5] Workqueue: usb_hub_wq hub_event [ 69.655363][ T5] Call Trace: [ 69.658632][ T5] dump_stack+0xca/0x13e [ 69.662852][ T5] print_address_description+0x6a/0x32c [ 69.668370][ T5] ? disconnect_rio+0x12b/0x1b0 [ 69.673198][ T5] kasan_report_invalid_free+0x61/0xa0 [ 69.678648][ T5] ? disconnect_rio+0x12b/0x1b0 [ 69.683476][ T5] __kasan_slab_free+0x162/0x180 [ 69.688388][ T5] ? disconnect_rio+0x12b/0x1b0 [ 69.693213][ T5] kfree+0xe4/0x2f0 [ 69.696999][ T5] disconnect_rio+0x12b/0x1b0 [ 69.701650][ T5] usb_unbind_interface+0x1bd/0x8a0 [ 69.706833][ T5] ? usb_autoresume_device+0x60/0x60 [ 69.712101][ T5] device_release_driver_internal+0x42f/0x500 [ 69.714844][ T17] usb 3-1: USB disconnect, device number 2 [ 69.718157][ T5] bus_remove_device+0x2dc/0x4a0 [ 69.724059][ T83] usb 6-1: USB disconnect, device number 2 executing program [ 69.728894][ T5] device_del+0x420/0xb10 [ 69.728910][ T5] ? __device_links_no_driver+0x240/0x240 [ 69.744705][ T5] ? lockdep_hardirqs_on+0x379/0x580 [ 69.749989][ T5] ? remove_intf_ep_devs+0x13f/0x1d0 [ 69.755271][ T5] usb_disable_device+0x211/0x690 [ 69.760287][ T5] usb_disconnect+0x284/0x8d0 [ 69.764940][ T5] hub_event+0x1454/0x3640 [ 69.769331][ T5] ? find_held_lock+0x2d/0x110 [ 69.774070][ T5] ? mark_held_locks+0xe0/0xe0 [ 69.778807][ T5] ? hub_port_debounce+0x260/0x260 [ 69.783897][ T5] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 69.789419][ T5] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 69.794695][ T5] process_one_work+0x92b/0x1530 [ 69.799630][ T5] ? pwq_dec_nr_in_flight+0x310/0x310 [ 69.804977][ T5] ? do_raw_spin_lock+0x11a/0x280 [ 69.810052][ T5] worker_thread+0x96/0xe20 [ 69.814548][ T5] ? process_one_work+0x1530/0x1530 [ 69.819730][ T5] kthread+0x318/0x420 [ 69.823776][ T5] ? kthread_create_on_node+0xf0/0xf0 [ 69.829555][ T5] ret_from_fork+0x24/0x30 [ 69.833940][ T5] [ 69.836242][ T5] Allocated by task 22: [ 69.840373][ T5] save_stack+0x1b/0x80 [ 69.844502][ T5] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 69.850107][ T5] probe_rio+0x135/0x248 [ 69.854328][ T5] usb_probe_interface+0x305/0x7a0 [ 69.859414][ T5] really_probe+0x281/0x6d0 [ 69.863891][ T5] driver_probe_device+0x101/0x1b0 [ 69.868972][ T5] __device_attach_driver+0x1c2/0x220 [ 69.874316][ T5] bus_for_each_drv+0x162/0x1e0 [ 69.879140][ T5] __device_attach+0x217/0x360 [ 69.883874][ T5] bus_probe_device+0x1e4/0x290 [ 69.888699][ T5] device_add+0xae6/0x16f0 [ 69.893092][ T5] usb_set_configuration+0xdf6/0x1670 [ 69.898436][ T5] generic_probe+0x9d/0xd5 [ 69.902835][ T5] usb_probe_device+0x99/0x100 [ 69.907579][ T5] really_probe+0x281/0x6d0 [ 69.912101][ T5] driver_probe_device+0x101/0x1b0 [ 69.917190][ T5] __device_attach_driver+0x1c2/0x220 [ 69.922538][ T5] bus_for_each_drv+0x162/0x1e0 [ 69.927371][ T5] __device_attach+0x217/0x360 [ 69.932110][ T5] bus_probe_device+0x1e4/0x290 [ 69.936937][ T5] device_add+0xae6/0x16f0 [ 69.941337][ T5] usb_new_device.cold+0x6a4/0xe79 [ 69.946510][ T5] hub_event+0x1b5c/0x3640 [ 69.950899][ T5] process_one_work+0x92b/0x1530 [ 69.955813][ T5] worker_thread+0x96/0xe20 [ 69.960290][ T5] kthread+0x318/0x420 [ 69.964373][ T5] ret_from_fork+0x24/0x30 [ 69.968763][ T5] [ 69.971074][ T5] Freed by task 12: [ 69.974906][ T5] save_stack+0x1b/0x80 [ 69.979035][ T5] __kasan_slab_free+0x130/0x180 [ 69.983944][ T5] kfree+0xe4/0x2f0 [ 69.987729][ T5] disconnect_rio+0x12b/0x1b0 [ 69.992379][ T5] usb_unbind_interface+0x1bd/0x8a0 [ 69.997558][ T5] device_release_driver_internal+0x42f/0x500 [ 70.003600][ T5] bus_remove_device+0x2dc/0x4a0 [ 70.008521][ T5] device_del+0x420/0xb10 [ 70.012845][ T5] usb_disable_device+0x211/0x690 [ 70.017841][ T5] usb_disconnect+0x284/0x8d0 [ 70.022516][ T5] hub_event+0x1454/0x3640 [ 70.026926][ T5] process_one_work+0x92b/0x1530 [ 70.031840][ T5] worker_thread+0x96/0xe20 [ 70.036315][ T5] kthread+0x318/0x420 [ 70.040549][ T5] ret_from_fork+0x24/0x30 [ 70.044938][ T5] [ 70.047252][ T5] The buggy address belongs to the object at ffff8881d3ed2200 [ 70.047252][ T5] which belongs to the cache kmalloc-4k of size 4096 [ 70.061284][ T5] The buggy address is located 0 bytes inside of [ 70.061284][ T5] 4096-byte region [ffff8881d3ed2200, ffff8881d3ed3200) [ 70.074438][ T5] The buggy address belongs to the page: [ 70.080045][ T5] page:ffffea00074fb400 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 70.090945][ T5] flags: 0x200000000010200(slab|head) [ 70.096292][ T5] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 70.104852][ T5] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 70.113404][ T5] page dumped because: kasan: bad access detected [ 70.119782][ T5] [ 70.122094][ T5] Memory state around the buggy address: [ 70.127819][ T5] ffff8881d3ed2100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc executing program executing program [ 70.135854][ T5] ffff8881d3ed2180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 70.143897][ T5] >ffff8881d3ed2200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.151929][ T5] ^ [ 70.152605][ T17] usb 3-1: new high-speed USB device number 3 using dummy_hcd [ 70.155971][ T5] ffff8881d3ed2280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.155980][ T5] ffff8881d3ed2300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.155984][ T5] ================================================================== [ 70.155989][ T5] Disabling lock debugging due to kernel taint [ 70.156179][ T5] Kernel panic - not syncing: panic_on_warn set ... [ 70.168617][ T83] usb 5-1: USB disconnect, device number 2 [ 70.171492][ T5] CPU: 0 PID: 5 Comm: kworker/0:0 Tainted: G B 5.3.0+ #0 [ 70.171499][ T5] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.171514][ T5] Workqueue: usb_hub_wq hub_event [ 70.229338][ T5] Call Trace: [ 70.232618][ T5] dump_stack+0xca/0x13e [ 70.236854][ T5] panic+0x2a3/0x6da [ 70.240731][ T5] ? add_taint.cold+0x16/0x16 [ 70.245382][ T5] ? disconnect_rio+0x12b/0x1b0 [ 70.250204][ T5] ? trace_hardirqs_on+0x55/0x1e0 [ 70.255204][ T5] ? disconnect_rio+0x12b/0x1b0 [ 70.260027][ T5] end_report+0x43/0x49 [ 70.264156][ T5] kasan_report_invalid_free+0x7d/0xa0 [ 70.269602][ T5] ? disconnect_rio+0x12b/0x1b0 [ 70.274436][ T5] __kasan_slab_free+0x162/0x180 [ 70.279343][ T5] ? disconnect_rio+0x12b/0x1b0 [ 70.284167][ T5] kfree+0xe4/0x2f0 [ 70.287946][ T5] disconnect_rio+0x12b/0x1b0 [ 70.292597][ T5] usb_unbind_interface+0x1bd/0x8a0 [ 70.297768][ T5] ? usb_autoresume_device+0x60/0x60 [ 70.303037][ T5] device_release_driver_internal+0x42f/0x500 [ 70.309087][ T5] bus_remove_device+0x2dc/0x4a0 [ 70.314007][ T5] device_del+0x420/0xb10 [ 70.318308][ T5] ? __device_links_no_driver+0x240/0x240 [ 70.324000][ T5] ? lockdep_hardirqs_on+0x379/0x580 [ 70.329258][ T5] ? remove_intf_ep_devs+0x13f/0x1d0 [ 70.334517][ T5] usb_disable_device+0x211/0x690 [ 70.339518][ T5] usb_disconnect+0x284/0x8d0 [ 70.344171][ T5] hub_event+0x1454/0x3640 [ 70.348576][ T5] ? find_held_lock+0x2d/0x110 [ 70.353312][ T5] ? mark_held_locks+0xe0/0xe0 [ 70.358049][ T5] ? hub_port_debounce+0x260/0x260 [ 70.363135][ T5] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 70.368654][ T5] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 70.373911][ T5] process_one_work+0x92b/0x1530 [ 70.378819][ T5] ? pwq_dec_nr_in_flight+0x310/0x310 [ 70.384165][ T5] ? do_raw_spin_lock+0x11a/0x280 [ 70.389165][ T5] worker_thread+0x96/0xe20 [ 70.393639][ T5] ? process_one_work+0x1530/0x1530 [ 70.398807][ T5] kthread+0x318/0x420 [ 70.402577][ T17] usb 3-1: Using ep0 maxpacket: 8 [ 70.402852][ T5] ? kthread_create_on_node+0xf0/0xf0 [ 70.402863][ T5] ret_from_fork+0x24/0x30 [ 70.408606][ T5] Kernel Offset: disabled [ 70.422627][ T5] Rebooting in 86400 seconds..