[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. [ 14.447962][ C1] random: crng init done [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.1.33' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 65.986303][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 66.006306][ T22] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 66.006888][ T5] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 66.013923][ T83] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 66.028898][ T17] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 66.036454][ T1737] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 66.226359][ T12] usb 1-1: Using ep0 maxpacket: 16 [ 66.256273][ T5] usb 3-1: Using ep0 maxpacket: 16 [ 66.276291][ T1737] usb 4-1: Using ep0 maxpacket: 16 [ 66.281513][ T17] usb 2-1: Using ep0 maxpacket: 16 [ 66.286736][ T22] usb 5-1: Using ep0 maxpacket: 16 [ 66.291916][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 66.346450][ T12] usb 1-1: config 0 has an invalid interface number: 133 but max is 0 [ 66.354785][ T12] usb 1-1: config 0 has no interface number 0 [ 66.361176][ T12] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 66.370255][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 66.378395][ T5] usb 3-1: config 0 has an invalid interface number: 133 but max is 0 [ 66.386584][ T5] usb 3-1: config 0 has no interface number 0 [ 66.393286][ T5] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 66.402726][ T5] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 66.411300][ T12] usb 1-1: config 0 descriptor?? [ 66.416739][ T22] usb 5-1: config 0 has an invalid interface number: 133 but max is 0 [ 66.425094][ T22] usb 5-1: config 0 has no interface number 0 [ 66.425596][ T5] usb 3-1: config 0 descriptor?? [ 66.435013][ T17] usb 2-1: config 0 has an invalid interface number: 133 but max is 0 [ 66.444520][ T17] usb 2-1: config 0 has no interface number 0 [ 66.450843][ T1737] usb 4-1: config 0 has an invalid interface number: 133 but max is 0 [ 66.459113][ T1737] usb 4-1: config 0 has no interface number 0 [ 66.465274][ T83] usb 6-1: config 0 has an invalid interface number: 133 but max is 0 [ 66.467980][ T12] rio500 1-1:0.133: USB Rio found at address 2 [ 66.473493][ T83] usb 6-1: config 0 has no interface number 0 [ 66.483607][ T5] rio500 3-1:0.133: USB Rio found at address 2 [ 66.488695][ T1737] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 66.500989][ T1737] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 66.512535][ T22] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 66.521718][ T22] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 66.529963][ T17] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 66.539046][ T17] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 66.547169][ T83] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 66.556264][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 66.565074][ T1737] usb 4-1: config 0 descriptor?? [ 66.571091][ T22] usb 5-1: config 0 descriptor?? [ 66.576546][ T17] usb 2-1: config 0 descriptor?? [ 66.582859][ T83] usb 6-1: config 0 descriptor?? [ 66.607884][ T22] rio500 5-1:0.133: Second USB Rio at address 2 refused [ 66.615026][ T22] rio500: probe of 5-1:0.133 failed with error -16 [ 66.622960][ T17] rio500 2-1:0.133: Second USB Rio at address 2 refused [ 66.631279][ T1737] rio500 4-1:0.133: Second USB Rio at address 2 refused [ 66.639584][ T83] rio500 6-1:0.133: Second USB Rio at address 2 refused [ 66.648910][ T1737] rio500: probe of 4-1:0.133 failed with error -16 executing program executing program [ 66.656562][ T17] rio500: probe of 2-1:0.133 failed with error -16 [ 66.664281][ T83] rio500: probe of 6-1:0.133 failed with error -16 [ 66.681560][ T12] usb 3-1: USB disconnect, device number 2 [ 66.688524][ T1737] usb 1-1: USB disconnect, device number 2 [ 66.691254][ T12] rio500 3-1:0.133: USB Rio disconnected. [ 66.703797][ T1737] ================================================================== [ 66.711991][ T1737] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 66.720467][ T1737] [ 66.722820][ T1737] CPU: 1 PID: 1737 Comm: kworker/1:3 Not tainted 5.3.0+ #0 [ 66.729987][ T1737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 66.740034][ T1737] Workqueue: usb_hub_wq hub_event [ 66.745033][ T1737] Call Trace: [ 66.748314][ T1737] dump_stack+0xca/0x13e [ 66.752536][ T1737] print_address_description+0x6a/0x32c [ 66.758067][ T1737] ? disconnect_rio+0x12b/0x1b0 [ 66.762904][ T1737] kasan_report_invalid_free+0x61/0xa0 [ 66.768341][ T1737] ? disconnect_rio+0x12b/0x1b0 [ 66.773172][ T1737] __kasan_slab_free+0x162/0x180 [ 66.778108][ T1737] ? disconnect_rio+0x12b/0x1b0 [ 66.782932][ T1737] kfree+0xe4/0x2f0 [ 66.786725][ T1737] disconnect_rio+0x12b/0x1b0 [ 66.791398][ T1737] usb_unbind_interface+0x1bd/0x8a0 [ 66.796592][ T1737] ? usb_autoresume_device+0x60/0x60 executing program [ 66.803471][ T1737] device_release_driver_internal+0x42f/0x500 [ 66.807817][ T5] usb 5-1: USB disconnect, device number 2 [ 66.809530][ T1737] bus_remove_device+0x2dc/0x4a0 [ 66.820719][ T1737] device_del+0x420/0xb10 [ 66.825063][ T1737] ? __device_links_no_driver+0x240/0x240 [ 66.830283][ T1742] usb 2-1: USB disconnect, device number 2 [ 66.830787][ T1737] ? lockdep_hardirqs_on+0x379/0x580 [ 66.830805][ T1737] ? remove_intf_ep_devs+0x13f/0x1d0 [ 66.846574][ T1740] usb 4-1: USB disconnect, device number 2 [ 66.847338][ T1737] usb_disable_device+0x211/0x690 [ 66.847352][ T1737] usb_disconnect+0x284/0x8d0 [ 66.862837][ T1737] hub_event+0x1454/0x3640 [ 66.867244][ T1737] ? find_held_lock+0x2d/0x110 [ 66.872010][ T1737] ? mark_held_locks+0xe0/0xe0 [ 66.876758][ T1737] ? hub_port_debounce+0x260/0x260 [ 66.881892][ T1737] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 66.887416][ T1737] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 66.892721][ T1737] process_one_work+0x92b/0x1530 [ 66.897743][ T1737] ? pwq_dec_nr_in_flight+0x310/0x310 [ 66.903097][ T1737] ? do_raw_spin_lock+0x11a/0x280 [ 66.908101][ T1737] worker_thread+0x96/0xe20 [ 66.912703][ T1737] ? process_one_work+0x1530/0x1530 [ 66.917880][ T1737] kthread+0x318/0x420 [ 66.921931][ T1737] ? kthread_create_on_node+0xf0/0xf0 [ 66.927280][ T1737] ret_from_fork+0x24/0x30 [ 66.931670][ T1737] [ 66.934062][ T1737] Allocated by task 5: [ 66.938128][ T1737] save_stack+0x1b/0x80 [ 66.942269][ T1737] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 66.947892][ T1737] probe_rio+0x135/0x248 [ 66.952120][ T1737] usb_probe_interface+0x305/0x7a0 [ 66.957386][ T1737] really_probe+0x281/0x6d0 [ 66.961888][ T1737] driver_probe_device+0x101/0x1b0 [ 66.967110][ T1737] __device_attach_driver+0x1c2/0x220 [ 66.972458][ T1737] bus_for_each_drv+0x162/0x1e0 [ 66.977286][ T1737] __device_attach+0x217/0x360 [ 66.982027][ T1737] bus_probe_device+0x1e4/0x290 [ 66.986862][ T1737] device_add+0xae6/0x16f0 [ 66.991268][ T1737] usb_set_configuration+0xdf6/0x1670 [ 66.996623][ T1737] generic_probe+0x9d/0xd5 [ 67.001019][ T1737] usb_probe_device+0x99/0x100 [ 67.005765][ T1737] really_probe+0x281/0x6d0 [ 67.010266][ T1737] driver_probe_device+0x101/0x1b0 [ 67.015366][ T1737] __device_attach_driver+0x1c2/0x220 [ 67.020714][ T1737] bus_for_each_drv+0x162/0x1e0 [ 67.025539][ T1737] __device_attach+0x217/0x360 [ 67.030288][ T1737] bus_probe_device+0x1e4/0x290 [ 67.035126][ T1737] device_add+0xae6/0x16f0 [ 67.039534][ T1737] usb_new_device.cold+0x6a4/0xe79 [ 67.044636][ T1737] hub_event+0x1b5c/0x3640 [ 67.049034][ T1737] process_one_work+0x92b/0x1530 [ 67.053967][ T1737] worker_thread+0x96/0xe20 [ 67.058454][ T1737] kthread+0x318/0x420 [ 67.062498][ T1737] ret_from_fork+0x24/0x30 [ 67.066884][ T1737] [ 67.069192][ T1737] Freed by task 12: [ 67.073004][ T1737] save_stack+0x1b/0x80 [ 67.077136][ T1737] __kasan_slab_free+0x130/0x180 [ 67.082049][ T1737] kfree+0xe4/0x2f0 [ 67.085836][ T1737] disconnect_rio+0x12b/0x1b0 [ 67.090490][ T1737] usb_unbind_interface+0x1bd/0x8a0 [ 67.095676][ T1737] device_release_driver_internal+0x42f/0x500 [ 67.101729][ T1737] bus_remove_device+0x2dc/0x4a0 [ 67.106657][ T1737] device_del+0x420/0xb10 [ 67.110975][ T1737] usb_disable_device+0x211/0x690 [ 67.115987][ T1737] usb_disconnect+0x284/0x8d0 [ 67.120668][ T1737] hub_event+0x1454/0x3640 [ 67.125074][ T1737] process_one_work+0x92b/0x1530 [ 67.130080][ T1737] worker_thread+0x96/0xe20 [ 67.134560][ T1737] kthread+0x318/0x420 [ 67.138619][ T1737] ret_from_fork+0x24/0x30 [ 67.143019][ T1737] [ 67.145371][ T1737] The buggy address belongs to the object at ffff8881d5bb3300 [ 67.145371][ T1737] which belongs to the cache kmalloc-4k of size 4096 [ 67.159404][ T1737] The buggy address is located 0 bytes inside of [ 67.159404][ T1737] 4096-byte region [ffff8881d5bb3300, ffff8881d5bb4300) [ 67.172567][ T1737] The buggy address belongs to the page: [ 67.178177][ T1737] page:ffffea000756ec00 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 67.189276][ T1737] flags: 0x200000000010200(slab|head) [ 67.194641][ T1737] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 67.203293][ T1737] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 67.211859][ T1737] page dumped because: kasan: bad access detected [ 67.218254][ T1737] [ 67.220562][ T1737] Memory state around the buggy address: [ 67.226182][ T1737] ffff8881d5bb3200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 67.234489][ T1737] ffff8881d5bb3280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 67.242530][ T1737] >ffff8881d5bb3300: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.250581][ T1737] ^ executing program [ 67.254640][ T1737] ffff8881d5bb3380: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.262678][ T1737] ffff8881d5bb3400: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.270712][ T1737] ================================================================== [ 67.278759][ T1737] Disabling lock debugging due to kernel taint [ 67.285205][ T1737] Kernel panic - not syncing: panic_on_warn set ... [ 67.291824][ T1737] CPU: 1 PID: 1737 Comm: kworker/1:3 Tainted: G B 5.3.0+ #0 [ 67.300395][ T1737] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.310440][ T1737] Workqueue: usb_hub_wq hub_event [ 67.315438][ T1737] Call Trace: [ 67.318723][ T1737] dump_stack+0xca/0x13e [ 67.322942][ T1737] panic+0x2a3/0x6da [ 67.326814][ T1737] ? add_taint.cold+0x16/0x16 [ 67.331471][ T1737] ? disconnect_rio+0x12b/0x1b0 [ 67.336314][ T1737] ? trace_hardirqs_on+0x55/0x1e0 [ 67.341325][ T1737] ? disconnect_rio+0x12b/0x1b0 [ 67.346167][ T1737] end_report+0x43/0x49 [ 67.350313][ T1737] kasan_report_invalid_free+0x7d/0xa0 [ 67.355747][ T1737] ? disconnect_rio+0x12b/0x1b0 [ 67.360573][ T1737] __kasan_slab_free+0x162/0x180 [ 67.365572][ T1737] ? disconnect_rio+0x12b/0x1b0 [ 67.370398][ T1737] kfree+0xe4/0x2f0 [ 67.374182][ T1737] disconnect_rio+0x12b/0x1b0 [ 67.378838][ T1737] usb_unbind_interface+0x1bd/0x8a0 [ 67.384014][ T1737] ? usb_autoresume_device+0x60/0x60 [ 67.389282][ T1737] device_release_driver_internal+0x42f/0x500 [ 67.395324][ T1737] bus_remove_device+0x2dc/0x4a0 [ 67.400248][ T1737] device_del+0x420/0xb10 [ 67.404554][ T1737] ? __device_links_no_driver+0x240/0x240 [ 67.410251][ T1737] ? lockdep_hardirqs_on+0x379/0x580 [ 67.415525][ T1737] ? remove_intf_ep_devs+0x13f/0x1d0 [ 67.420797][ T1737] usb_disable_device+0x211/0x690 [ 67.425797][ T1737] usb_disconnect+0x284/0x8d0 [ 67.430450][ T1737] hub_event+0x1454/0x3640 [ 67.434857][ T1737] ? find_held_lock+0x2d/0x110 [ 67.439613][ T1737] ? mark_held_locks+0xe0/0xe0 [ 67.444353][ T1737] ? hub_port_debounce+0x260/0x260 [ 67.449443][ T1737] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 67.454966][ T1737] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 67.460238][ T1737] process_one_work+0x92b/0x1530 [ 67.465157][ T1737] ? pwq_dec_nr_in_flight+0x310/0x310 [ 67.470504][ T1737] ? do_raw_spin_lock+0x11a/0x280 [ 67.475529][ T1737] worker_thread+0x96/0xe20 [ 67.480010][ T1737] ? process_one_work+0x1530/0x1530 [ 67.485201][ T1737] kthread+0x318/0x420 [ 67.489285][ T1737] ? kthread_create_on_node+0xf0/0xf0 [ 67.494636][ T1737] ret_from_fork+0x24/0x30 [ 67.499763][ T1737] Kernel Offset: disabled [ 67.504083][ T1737] Rebooting in 86400 seconds..