[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[ 14.410860][ T1668] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[ ok 8[?25h[?0c. [ 14.540140][ C1] random: crng init done Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.62' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 51.033208][ T83] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 51.033215][ T102] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 51.033558][ T17] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 51.040993][ T5] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 51.063457][ T12] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 51.070987][ T1735] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 51.273206][ T83] usb 1-1: Using ep0 maxpacket: 8 [ 51.283458][ T17] usb 4-1: Using ep0 maxpacket: 8 [ 51.313163][ T102] usb 6-1: Using ep0 maxpacket: 8 [ 51.318624][ T12] usb 3-1: Using ep0 maxpacket: 8 [ 51.323816][ T1735] usb 5-1: Using ep0 maxpacket: 8 [ 51.329136][ T5] usb 2-1: Using ep0 maxpacket: 8 [ 51.393332][ T83] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 51.401727][ T83] usb 1-1: config 0 has no interface number 0 [ 51.408084][ T17] usb 4-1: config 0 has an invalid interface number: 67 but max is 0 [ 51.416540][ T17] usb 4-1: config 0 has no interface number 0 [ 51.422672][ T83] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 51.431762][ T83] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.441772][ T17] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 51.443487][ T102] usb 6-1: config 0 has an invalid interface number: 67 but max is 0 [ 51.450831][ T17] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.459815][ T102] usb 6-1: config 0 has no interface number 0 [ 51.474449][ T12] usb 3-1: config 0 has an invalid interface number: 67 but max is 0 [ 51.474577][ T83] usb 1-1: config 0 descriptor?? [ 51.482592][ T12] usb 3-1: config 0 has no interface number 0 [ 51.494213][ T1735] usb 5-1: config 0 has an invalid interface number: 67 but max is 0 [ 51.494454][ T17] usb 4-1: config 0 descriptor?? [ 51.502345][ T1735] usb 5-1: config 0 has no interface number 0 [ 51.513628][ T5] usb 2-1: config 0 has an invalid interface number: 67 but max is 0 [ 51.521689][ T5] usb 2-1: config 0 has no interface number 0 [ 51.528078][ T5] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 51.538217][ T5] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.546406][ T12] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 51.554903][ T83] rio500 1-1:0.67: USB Rio found at address 2 [ 51.555520][ T12] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.569757][ T1735] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 51.574022][ T17] rio500 4-1:0.67: Second USB Rio at address 2 refused [ 51.578998][ T1735] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.581671][ T1735] usb 5-1: config 0 descriptor?? [ 51.599032][ T102] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 51.608168][ T102] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 51.611621][ T17] rio500: probe of 4-1:0.67 failed with error -16 [ 51.621143][ T5] usb 2-1: config 0 descriptor?? [ 51.628728][ T12] usb 3-1: config 0 descriptor?? [ 51.634939][ T102] usb 6-1: config 0 descriptor?? [ 51.664394][ T1735] rio500 5-1:0.67: Second USB Rio at address 2 refused [ 51.671371][ T1735] rio500: probe of 5-1:0.67 failed with error -16 [ 51.679212][ T5] rio500 2-1:0.67: Second USB Rio at address 2 refused [ 51.687434][ T12] rio500 3-1:0.67: Second USB Rio at address 2 refused [ 51.695568][ T102] rio500 6-1:0.67: Second USB Rio at address 2 refused [ 51.702528][ T102] rio500: probe of 6-1:0.67 failed with error -16 [ 51.710476][ T12] rio500: probe of 3-1:0.67 failed with error -16 [ 51.717118][ T5] rio500: probe of 2-1:0.67 failed with error -16 executing program executing program [ 51.755101][ T17] usb 1-1: USB disconnect, device number 2 [ 51.756344][ T12] usb 4-1: USB disconnect, device number 2 [ 51.776734][ T17] rio500 1-1:0.67: USB Rio disconnected. executing program executing program executing program executing program [ 51.864437][ T83] usb 5-1: USB disconnect, device number 2 [ 51.880355][ T1737] usb 3-1: USB disconnect, device number 2 [ 51.881179][ T5] usb 2-1: USB disconnect, device number 2 [ 51.894713][ T22] usb 6-1: USB disconnect, device number 2 [ 52.143162][ T17] usb 1-1: new high-speed USB device number 3 using dummy_hcd [ 52.183227][ T12] usb 4-1: new high-speed USB device number 3 using dummy_hcd [ 52.233165][ T83] usb 5-1: new high-speed USB device number 3 using dummy_hcd [ 52.243161][ T22] usb 6-1: new high-speed USB device number 3 using dummy_hcd [ 52.263145][ T5] usb 2-1: new high-speed USB device number 3 using dummy_hcd [ 52.293227][ T1737] usb 3-1: new high-speed USB device number 3 using dummy_hcd [ 52.383138][ T17] usb 1-1: Using ep0 maxpacket: 8 [ 52.433177][ T12] usb 4-1: Using ep0 maxpacket: 8 [ 52.473248][ T83] usb 5-1: Using ep0 maxpacket: 8 [ 52.493247][ T22] usb 6-1: Using ep0 maxpacket: 8 [ 52.513268][ T5] usb 2-1: Using ep0 maxpacket: 8 [ 52.513307][ T17] usb 1-1: config 0 has an invalid interface number: 67 but max is 0 [ 52.526635][ T17] usb 1-1: config 0 has no interface number 0 [ 52.532897][ T17] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 52.542026][ T17] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 52.551051][ T17] usb 1-1: config 0 descriptor?? [ 52.556106][ T1737] usb 3-1: Using ep0 maxpacket: 8 [ 52.563349][ T12] usb 4-1: config 0 has an invalid interface number: 67 but max is 0 [ 52.571511][ T12] usb 4-1: config 0 has no interface number 0 [ 52.577954][ T12] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 52.587237][ T12] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 52.594793][ T17] rio500 1-1:0.67: USB Rio found at address 3 [ 52.603236][ T12] usb 4-1: config 0 descriptor?? [ 52.603424][ T83] usb 5-1: config 0 has an invalid interface number: 67 but max is 0 [ 52.616461][ T83] usb 5-1: config 0 has no interface number 0 [ 52.623304][ T22] usb 6-1: config 0 has an invalid interface number: 67 but max is 0 [ 52.631385][ T22] usb 6-1: config 0 has no interface number 0 [ 52.638325][ T22] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 52.647436][ T22] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 52.654530][ T12] rio500 4-1:0.67: Second USB Rio at address 3 refused [ 52.655602][ T83] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 52.662313][ T12] rio500: probe of 4-1:0.67 failed with error -16 [ 52.671336][ T83] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 52.685878][ T1737] usb 3-1: config 0 has an invalid interface number: 67 but max is 0 [ 52.694002][ T1737] usb 3-1: config 0 has no interface number 0 [ 52.700427][ T1737] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 52.703408][ T5] usb 2-1: config 0 has an invalid interface number: 67 but max is 0 [ 52.709511][ T1737] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 52.717576][ T5] usb 2-1: config 0 has no interface number 0 [ 52.718178][ T5] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=6e.90 [ 52.725931][ T22] usb 6-1: config 0 descriptor?? [ 52.731690][ T5] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 52.743901][ T83] usb 5-1: config 0 descriptor?? [ 52.759232][ T1737] usb 3-1: config 0 descriptor?? [ 52.763949][ T5] usb 2-1: config 0 descriptor?? executing program [ 52.774601][ T22] rio500 6-1:0.67: Second USB Rio at address 3 refused [ 52.781589][ T22] rio500: probe of 6-1:0.67 failed with error -16 [ 52.795010][ T22] usb 1-1: USB disconnect, device number 3 [ 52.801855][ T22] rio500 1-1:0.67: USB Rio disconnected. [ 52.808951][ T83] rio500 5-1:0.67: USB Rio found at address 3 [ 52.816338][ T1737] rio500 3-1:0.67: USB Rio found at address 3 executing program [ 52.825022][ T5] rio500 2-1:0.67: Second USB Rio at address 3 refused [ 52.831939][ T5] rio500: probe of 2-1:0.67 failed with error -16 [ 52.879689][ T1737] usb 4-1: USB disconnect, device number 3 executing program executing program [ 52.974628][ T83] usb 6-1: USB disconnect, device number 3 [ 53.008944][ T17] usb 5-1: USB disconnect, device number 3 [ 53.016631][ T17] rio500 5-1:0.67: USB Rio disconnected. executing program [ 53.025083][ T1753] usb 3-1: USB disconnect, device number 3 [ 53.025624][ T5] usb 2-1: USB disconnect, device number 3 [ 53.031824][ T1753] ================================================================== [ 53.045002][ T1753] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 53.053320][ T1753] [ 53.055658][ T1753] CPU: 1 PID: 1753 Comm: kworker/1:5 Not tainted 5.3.0+ #0 [ 53.062924][ T1753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.073283][ T1753] Workqueue: usb_hub_wq hub_event [ 53.078415][ T1753] Call Trace: [ 53.081709][ T1753] dump_stack+0xca/0x13e [ 53.085941][ T1753] print_address_description+0x6a/0x32c [ 53.091475][ T1753] ? disconnect_rio+0x12b/0x1b0 [ 53.096757][ T1753] kasan_report_invalid_free+0x61/0xa0 [ 53.102214][ T1753] ? disconnect_rio+0x12b/0x1b0 [ 53.107062][ T1753] __kasan_slab_free+0x162/0x180 [ 53.112073][ T1753] ? disconnect_rio+0x12b/0x1b0 [ 53.116924][ T1753] kfree+0xe4/0x2f0 [ 53.120734][ T1753] disconnect_rio+0x12b/0x1b0 [ 53.125411][ T1753] usb_unbind_interface+0x1bd/0x8a0 [ 53.130597][ T1753] ? usb_autoresume_device+0x60/0x60 [ 53.135874][ T1753] device_release_driver_internal+0x42f/0x500 [ 53.141933][ T1753] bus_remove_device+0x2dc/0x4a0 [ 53.146858][ T1753] device_del+0x420/0xb10 [ 53.151202][ T1753] ? __device_links_no_driver+0x240/0x240 [ 53.156912][ T1753] ? lockdep_hardirqs_on+0x379/0x580 [ 53.162266][ T1753] ? remove_intf_ep_devs+0x13f/0x1d0 [ 53.167538][ T1753] usb_disable_device+0x211/0x690 [ 53.172589][ T1753] usb_disconnect+0x284/0x8d0 [ 53.177246][ T1753] hub_event+0x1454/0x3640 [ 53.181734][ T1753] ? find_held_lock+0x2d/0x110 [ 53.186474][ T1753] ? mark_held_locks+0xe0/0xe0 [ 53.191258][ T1753] ? hub_port_debounce+0x260/0x260 [ 53.196391][ T1753] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 53.201919][ T1753] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 53.207300][ T1753] process_one_work+0x92b/0x1530 [ 53.212233][ T1753] ? pwq_dec_nr_in_flight+0x310/0x310 [ 53.217594][ T1753] ? do_raw_spin_lock+0x11a/0x280 [ 53.222598][ T1753] worker_thread+0x96/0xe20 [ 53.227085][ T1753] ? process_one_work+0x1530/0x1530 [ 53.232381][ T1753] kthread+0x318/0x420 [ 53.236488][ T1753] ? kthread_create_on_node+0xf0/0xf0 [ 53.241841][ T1753] ret_from_fork+0x24/0x30 [ 53.246231][ T1753] [ 53.248537][ T1753] Allocated by task 83: [ 53.252670][ T1753] save_stack+0x1b/0x80 [ 53.256946][ T1753] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 53.262632][ T1753] probe_rio+0x135/0x248 [ 53.266854][ T1753] usb_probe_interface+0x305/0x7a0 [ 53.271945][ T1753] really_probe+0x281/0x6d0 [ 53.276453][ T1753] driver_probe_device+0x101/0x1b0 [ 53.282011][ T1753] __device_attach_driver+0x1c2/0x220 [ 53.290145][ T1753] bus_for_each_drv+0x162/0x1e0 [ 53.295093][ T1753] __device_attach+0x217/0x360 [ 53.299841][ T1753] bus_probe_device+0x1e4/0x290 [ 53.304688][ T1753] device_add+0xae6/0x16f0 [ 53.309889][ T1753] usb_set_configuration+0xdf6/0x1670 [ 53.315246][ T1753] generic_probe+0x9d/0xd5 [ 53.319642][ T1753] usb_probe_device+0x99/0x100 [ 53.324385][ T1753] really_probe+0x281/0x6d0 [ 53.328966][ T1753] driver_probe_device+0x101/0x1b0 [ 53.334069][ T1753] __device_attach_driver+0x1c2/0x220 [ 53.339449][ T1753] bus_for_each_drv+0x162/0x1e0 [ 53.344285][ T1753] __device_attach+0x217/0x360 [ 53.349032][ T1753] bus_probe_device+0x1e4/0x290 [ 53.353873][ T1753] device_add+0xae6/0x16f0 [ 53.358283][ T1753] usb_new_device.cold+0x6a4/0xe79 [ 53.363378][ T1753] hub_event+0x1b5c/0x3640 [ 53.367784][ T1753] process_one_work+0x92b/0x1530 [ 53.372993][ T1753] worker_thread+0x96/0xe20 [ 53.377477][ T1753] kthread+0x318/0x420 [ 53.381528][ T1753] ret_from_fork+0x24/0x30 [ 53.386873][ T1753] [ 53.389184][ T1753] Freed by task 17: [ 53.392980][ T1753] save_stack+0x1b/0x80 [ 53.397200][ T1753] __kasan_slab_free+0x130/0x180 [ 53.402130][ T1753] kfree+0xe4/0x2f0 [ 53.405920][ T1753] disconnect_rio+0x12b/0x1b0 [ 53.410594][ T1753] usb_unbind_interface+0x1bd/0x8a0 [ 53.415893][ T1753] device_release_driver_internal+0x42f/0x500 [ 53.421950][ T1753] bus_remove_device+0x2dc/0x4a0 [ 53.427054][ T1753] device_del+0x420/0xb10 [ 53.431370][ T1753] usb_disable_device+0x211/0x690 [ 53.436396][ T1753] usb_disconnect+0x284/0x8d0 [ 53.441050][ T1753] hub_event+0x1454/0x3640 [ 53.445500][ T1753] process_one_work+0x92b/0x1530 [ 53.450431][ T1753] worker_thread+0x96/0xe20 [ 53.454924][ T1753] kthread+0x318/0x420 [ 53.459169][ T1753] ret_from_fork+0x24/0x30 [ 53.463571][ T1753] [ 53.465889][ T1753] The buggy address belongs to the object at ffff8881d164a200 [ 53.465889][ T1753] which belongs to the cache kmalloc-4k of size 4096 [ 53.480199][ T1753] The buggy address is located 0 bytes inside of [ 53.480199][ T1753] 4096-byte region [ffff8881d164a200, ffff8881d164b200) [ 53.493364][ T1753] The buggy address belongs to the page: [ 53.498977][ T1753] page:ffffea0007459200 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 53.510594][ T1753] flags: 0x200000000010200(slab|head) [ 53.516263][ T1753] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 53.524829][ T1753] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 53.533399][ T1753] page dumped because: kasan: bad access detected [ 53.539792][ T1753] [ 53.542097][ T1753] Memory state around the buggy address: [ 53.547701][ T1753] ffff8881d164a100: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 53.555742][ T1753] ffff8881d164a180: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 53.563798][ T1753] >ffff8881d164a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.572060][ T1753] ^ executing program [ 53.576131][ T1753] ffff8881d164a280: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.584193][ T1753] ffff8881d164a300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.592251][ T1753] ================================================================== [ 53.600295][ T1753] Disabling lock debugging due to kernel taint [ 53.606631][ T1753] Kernel panic - not syncing: panic_on_warn set ... [ 53.613223][ T1753] CPU: 1 PID: 1753 Comm: kworker/1:5 Tainted: G B 5.3.0+ #0 [ 53.621789][ T1753] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 53.631831][ T1753] Workqueue: usb_hub_wq hub_event [ 53.636829][ T1753] Call Trace: [ 53.640121][ T1753] dump_stack+0xca/0x13e [ 53.644340][ T1753] panic+0x2a3/0x6da [ 53.648300][ T1753] ? add_taint.cold+0x16/0x16 [ 53.652953][ T1753] ? disconnect_rio+0x12b/0x1b0 [ 53.657802][ T1753] ? trace_hardirqs_on+0x55/0x1e0 [ 53.662827][ T1753] ? disconnect_rio+0x12b/0x1b0 [ 53.667656][ T1753] end_report+0x43/0x49 [ 53.671794][ T1753] kasan_report_invalid_free+0x7d/0xa0 [ 53.677246][ T1753] ? disconnect_rio+0x12b/0x1b0 [ 53.682109][ T1753] __kasan_slab_free+0x162/0x180 [ 53.687035][ T1753] ? disconnect_rio+0x12b/0x1b0 [ 53.691862][ T1753] kfree+0xe4/0x2f0 [ 53.695651][ T1753] disconnect_rio+0x12b/0x1b0 [ 53.700338][ T1753] usb_unbind_interface+0x1bd/0x8a0 [ 53.705511][ T1753] ? usb_autoresume_device+0x60/0x60 [ 53.710777][ T1753] device_release_driver_internal+0x42f/0x500 [ 53.716833][ T1753] bus_remove_device+0x2dc/0x4a0 [ 53.721753][ T1753] device_del+0x420/0xb10 [ 53.726072][ T1753] ? __device_links_no_driver+0x240/0x240 [ 53.731769][ T1753] ? lockdep_hardirqs_on+0x379/0x580 [ 53.737043][ T1753] ? remove_intf_ep_devs+0x13f/0x1d0 [ 53.742325][ T1753] usb_disable_device+0x211/0x690 [ 53.747335][ T1753] usb_disconnect+0x284/0x8d0 [ 53.752172][ T1753] hub_event+0x1454/0x3640 [ 53.756578][ T1753] ? find_held_lock+0x2d/0x110 [ 53.761329][ T1753] ? mark_held_locks+0xe0/0xe0 [ 53.766074][ T1753] ? hub_port_debounce+0x260/0x260 [ 53.771169][ T1753] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 53.776821][ T1753] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 53.782217][ T1753] process_one_work+0x92b/0x1530 [ 53.787243][ T1753] ? pwq_dec_nr_in_flight+0x310/0x310 [ 53.792607][ T1753] ? do_raw_spin_lock+0x11a/0x280 [ 53.797627][ T1753] worker_thread+0x96/0xe20 [ 53.802131][ T1753] ? process_one_work+0x1530/0x1530 [ 53.807332][ T1753] kthread+0x318/0x420 [ 53.811390][ T1753] ? kthread_create_on_node+0xf0/0xf0 [ 53.816827][ T1753] ret_from_fork+0x24/0x30 [ 53.822066][ T1753] Kernel Offset: disabled [ 53.826380][ T1753] Rebooting in 86400 seconds..