INIT: Entering runlevel: 2 [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[?25l[?1c7[ ok 8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.135' (ECDSA) to the list of known hosts. executing program executing program executing program executing program executing program executing program syzkaller login: [ 57.347903][ T12] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 57.358257][ T102] usb 3-1: new high-speed USB device number 2 using dummy_hcd [ 57.367908][ T83] usb 6-1: new high-speed USB device number 2 using dummy_hcd [ 57.375529][ T17] usb 2-1: new high-speed USB device number 2 using dummy_hcd [ 57.377939][ T5] usb 5-1: new high-speed USB device number 2 using dummy_hcd [ 57.383169][ T22] usb 4-1: new high-speed USB device number 2 using dummy_hcd [ 57.587845][ T12] usb 1-1: Using ep0 maxpacket: 16 [ 57.598374][ T102] usb 3-1: Using ep0 maxpacket: 16 [ 57.628436][ T5] usb 5-1: Using ep0 maxpacket: 16 [ 57.637838][ T17] usb 2-1: Using ep0 maxpacket: 16 [ 57.643288][ T83] usb 6-1: Using ep0 maxpacket: 16 [ 57.648516][ T22] usb 4-1: Using ep0 maxpacket: 16 [ 57.707936][ T12] usb 1-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.716224][ T12] usb 1-1: config 0 has no interface number 0 [ 57.722622][ T102] usb 3-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.731680][ T102] usb 3-1: config 0 has no interface number 0 [ 57.737922][ T12] usb 1-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.747524][ T12] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.755558][ T102] usb 3-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.764830][ T102] usb 3-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.767954][ T17] usb 2-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.775045][ T102] usb 3-1: config 0 descriptor?? [ 57.781037][ T17] usb 2-1: config 0 has no interface number 0 [ 57.784805][ T17] usb 2-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.786250][ T5] usb 5-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.792311][ T17] usb 2-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.801227][ T5] usb 5-1: config 0 has no interface number 0 [ 57.809642][ T83] usb 6-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.821617][ T12] usb 1-1: config 0 descriptor?? [ 57.823432][ T83] usb 6-1: config 0 has no interface number 0 [ 57.823532][ T22] usb 4-1: config 0 has an invalid interface number: 133 but max is 0 [ 57.832276][ T5] usb 5-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.836536][ T22] usb 4-1: config 0 has no interface number 0 [ 57.837017][ T22] usb 4-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.842713][ T5] usb 5-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.850886][ T22] usb 4-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.851126][ T83] usb 6-1: New USB device found, idVendor=0841, idProduct=0001, bcdDevice=c5.d0 [ 57.864868][ T5] usb 5-1: config 0 descriptor?? [ 57.866067][ T83] usb 6-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 57.871600][ T83] usb 6-1: config 0 descriptor?? [ 57.877070][ T102] rio500 3-1:0.133: USB Rio found at address 2 [ 57.883486][ T22] usb 4-1: config 0 descriptor?? [ 57.892499][ T12] rio500 1-1:0.133: USB Rio found at address 2 [ 57.901101][ T17] usb 2-1: config 0 descriptor?? [ 57.969203][ T5] rio500 5-1:0.133: Second USB Rio at address 2 refused [ 57.976445][ T5] rio500: probe of 5-1:0.133 failed with error -16 [ 57.989274][ T83] rio500 6-1:0.133: Second USB Rio at address 2 refused [ 57.996292][ T83] rio500: probe of 6-1:0.133 failed with error -16 [ 58.004139][ T22] rio500 4-1:0.133: Second USB Rio at address 2 refused [ 58.012579][ T17] rio500 2-1:0.133: Second USB Rio at address 2 refused [ 58.020144][ T17] rio500: probe of 2-1:0.133 failed with error -16 [ 58.028096][ T22] rio500: probe of 4-1:0.133 failed with error -16 executing program executing program executing program [ 58.077181][ T5] usb 3-1: USB disconnect, device number 2 [ 58.084628][ T5] rio500 3-1:0.133: USB Rio disconnected. [ 58.097040][ T12] usb 1-1: USB disconnect, device number 2 [ 58.103767][ T12] ================================================================== [ 58.111931][ T12] BUG: KASAN: double-free or invalid-free in disconnect_rio+0x12b/0x1b0 [ 58.120245][ T12] [ 58.122587][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.3.0+ #0 [ 58.129586][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.139642][ T12] Workqueue: usb_hub_wq hub_event [ 58.144643][ T12] Call Trace: [ 58.147911][ T12] dump_stack+0xca/0x13e [ 58.152144][ T12] print_address_description+0x6a/0x32c [ 58.157775][ T12] ? disconnect_rio+0x12b/0x1b0 [ 58.162606][ T12] kasan_report_invalid_free+0x61/0xa0 [ 58.168075][ T12] ? disconnect_rio+0x12b/0x1b0 [ 58.169110][ T17] usb 5-1: USB disconnect, device number 2 [ 58.172920][ T12] __kasan_slab_free+0x162/0x180 [ 58.183634][ T12] ? disconnect_rio+0x12b/0x1b0 [ 58.188482][ T12] kfree+0xe4/0x2f0 [ 58.192286][ T12] disconnect_rio+0x12b/0x1b0 [ 58.196968][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 58.202143][ T12] ? usb_autoresume_device+0x60/0x60 [ 58.207406][ T12] device_release_driver_internal+0x42f/0x500 [ 58.213450][ T12] bus_remove_device+0x2dc/0x4a0 [ 58.218382][ T12] device_del+0x420/0xb10 [ 58.222706][ T12] ? __device_links_no_driver+0x240/0x240 [ 58.228407][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 58.233670][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 58.238951][ T12] usb_disable_device+0x211/0x690 [ 58.243951][ T12] usb_disconnect+0x284/0x8d0 [ 58.248599][ T12] hub_event+0x1454/0x3640 [ 58.252995][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 58.258287][ T12] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 58.263728][ T12] ? hub_port_debounce+0x260/0x260 [ 58.268823][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.274354][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 58.279615][ T12] ? process_one_work+0x8e6/0x1530 [ 58.284704][ T12] process_one_work+0x92b/0x1530 [ 58.289628][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.294980][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 58.299994][ T12] worker_thread+0x96/0xe20 [ 58.304477][ T12] ? process_one_work+0x1530/0x1530 [ 58.309658][ T12] kthread+0x318/0x420 [ 58.313717][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 58.319075][ T12] ret_from_fork+0x24/0x30 [ 58.323486][ T12] [ 58.325798][ T12] Allocated by task 102: [ 58.330035][ T12] save_stack+0x1b/0x80 [ 58.334171][ T12] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 58.339784][ T12] probe_rio+0x135/0x248 [ 58.344003][ T12] usb_probe_interface+0x305/0x7a0 [ 58.349092][ T12] really_probe+0x281/0x6d0 [ 58.353570][ T12] driver_probe_device+0x101/0x1b0 [ 58.358658][ T12] __device_attach_driver+0x1c2/0x220 [ 58.364001][ T12] bus_for_each_drv+0x162/0x1e0 [ 58.368834][ T12] __device_attach+0x217/0x360 [ 58.373603][ T12] bus_probe_device+0x1e4/0x290 [ 58.378605][ T12] device_add+0xae6/0x16f0 [ 58.382998][ T12] usb_set_configuration+0xdf6/0x1670 [ 58.388350][ T12] generic_probe+0x9d/0xd5 [ 58.392927][ T12] usb_probe_device+0x99/0x100 [ 58.397671][ T12] really_probe+0x281/0x6d0 [ 58.402481][ T12] driver_probe_device+0x101/0x1b0 [ 58.407578][ T12] __device_attach_driver+0x1c2/0x220 [ 58.412929][ T12] bus_for_each_drv+0x162/0x1e0 [ 58.417765][ T12] __device_attach+0x217/0x360 [ 58.422514][ T12] bus_probe_device+0x1e4/0x290 [ 58.427346][ T12] device_add+0xae6/0x16f0 [ 58.431744][ T12] usb_new_device.cold+0x6a4/0xe79 [ 58.436925][ T12] hub_event+0x1b5c/0x3640 [ 58.441318][ T12] process_one_work+0x92b/0x1530 [ 58.446322][ T12] worker_thread+0x96/0xe20 [ 58.450808][ T12] kthread+0x318/0x420 [ 58.454852][ T12] ret_from_fork+0x24/0x30 [ 58.460543][ T12] [ 58.462858][ T12] Freed by task 5: [ 58.466568][ T12] save_stack+0x1b/0x80 [ 58.470717][ T12] __kasan_slab_free+0x130/0x180 [ 58.475649][ T12] kfree+0xe4/0x2f0 [ 58.479433][ T12] disconnect_rio+0x12b/0x1b0 [ 58.484097][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 58.489276][ T12] device_release_driver_internal+0x42f/0x500 [ 58.495313][ T12] bus_remove_device+0x2dc/0x4a0 [ 58.500232][ T12] device_del+0x420/0xb10 [ 58.504539][ T12] usb_disable_device+0x211/0x690 [ 58.509553][ T12] usb_disconnect+0x284/0x8d0 [ 58.514206][ T12] hub_event+0x1454/0x3640 [ 58.518597][ T12] process_one_work+0x92b/0x1530 [ 58.523509][ T12] worker_thread+0x96/0xe20 [ 58.528189][ T12] kthread+0x318/0x420 [ 58.532275][ T12] ret_from_fork+0x24/0x30 [ 58.536666][ T12] [ 58.538997][ T12] The buggy address belongs to the object at ffff8881d2f41100 [ 58.538997][ T12] which belongs to the cache kmalloc-4k of size 4096 [ 58.553029][ T12] The buggy address is located 0 bytes inside of [ 58.553029][ T12] 4096-byte region [ffff8881d2f41100, ffff8881d2f42100) [ 58.566189][ T12] The buggy address belongs to the page: [ 58.571802][ T12] page:ffffea00074bd000 refcount:1 mapcount:0 mapping:ffff8881da00c280 index:0x0 compound_mapcount: 0 [ 58.583234][ T12] flags: 0x200000000010200(slab|head) [ 58.588591][ T12] raw: 0200000000010200 dead000000000100 dead000000000122 ffff8881da00c280 [ 58.597217][ T12] raw: 0000000000000000 0000000000070007 00000001ffffffff 0000000000000000 [ 58.606039][ T12] page dumped because: kasan: bad access detected [ 58.612599][ T12] [ 58.614903][ T12] Memory state around the buggy address: [ 58.620524][ T12] ffff8881d2f41000: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 58.629607][ T12] ffff8881d2f41080: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 58.637655][ T12] >ffff8881d2f41100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.645689][ T12] ^ [ 58.649772][ T12] ffff8881d2f41180: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.657838][ T12] ffff8881d2f41200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 58.665877][ T12] ================================================================== [ 58.673915][ T12] Disabling lock debugging due to kernel taint [ 58.680218][ T12] Kernel panic - not syncing: panic_on_warn set ... [ 58.686820][ T12] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.3.0+ #0 [ 58.687311][ T1746] usb 4-1: USB disconnect, device number 2 [ 58.695216][ T12] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.695233][ T12] Workqueue: usb_hub_wq hub_event [ 58.695239][ T12] Call Trace: [ 58.695257][ T12] dump_stack+0xca/0x13e [ 58.695268][ T12] panic+0x2a3/0x6da executing program executing program executing program [ 58.695276][ T12] ? add_taint.cold+0x16/0x16 [ 58.695288][ T12] ? disconnect_rio+0x12b/0x1b0 [ 58.695301][ T12] ? trace_hardirqs_on+0x55/0x1e0 [ 58.695309][ T12] ? disconnect_rio+0x12b/0x1b0 [ 58.695320][ T12] end_report+0x43/0x49 [ 58.695330][ T12] kasan_report_invalid_free+0x7d/0xa0 [ 58.695339][ T12] ? disconnect_rio+0x12b/0x1b0 [ 58.695347][ T12] __kasan_slab_free+0x162/0x180 [ 58.695357][ T12] ? disconnect_rio+0x12b/0x1b0 [ 58.695366][ T12] kfree+0xe4/0x2f0 [ 58.695374][ T12] disconnect_rio+0x12b/0x1b0 [ 58.695385][ T12] usb_unbind_interface+0x1bd/0x8a0 [ 58.695397][ T12] ? usb_autoresume_device+0x60/0x60 [ 58.695409][ T12] device_release_driver_internal+0x42f/0x500 [ 58.695418][ T12] bus_remove_device+0x2dc/0x4a0 [ 58.695429][ T12] device_del+0x420/0xb10 [ 58.695445][ T12] ? __device_links_no_driver+0x240/0x240 [ 58.701675][ T22] usb 2-1: USB disconnect, device number 2 [ 58.711826][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 58.711840][ T12] ? remove_intf_ep_devs+0x13f/0x1d0 [ 58.711849][ T12] usb_disable_device+0x211/0x690 [ 58.711863][ T12] usb_disconnect+0x284/0x8d0 [ 58.711879][ T12] hub_event+0x1454/0x3640 [ 58.717293][ T83] usb 6-1: USB disconnect, device number 2 [ 58.720207][ T12] ? lockdep_hardirqs_on+0x379/0x580 [ 58.720218][ T12] ? trace_hardirqs_on_thunk+0x1a/0x20 [ 58.720233][ T12] ? hub_port_debounce+0x260/0x260 [ 58.866618][ T12] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 58.872165][ T12] ? rcu_read_lock_bh_held+0xb0/0xb0 [ 58.877431][ T12] ? process_one_work+0x8e6/0x1530 [ 58.882526][ T12] process_one_work+0x92b/0x1530 [ 58.887444][ T12] ? pwq_dec_nr_in_flight+0x310/0x310 [ 58.892826][ T12] ? do_raw_spin_lock+0x11a/0x280 [ 58.897844][ T12] worker_thread+0x96/0xe20 [ 58.902333][ T12] ? process_one_work+0x1530/0x1530 [ 58.907516][ T12] kthread+0x318/0x420 [ 58.911563][ T12] ? kthread_create_on_node+0xf0/0xf0 [ 58.916916][ T12] ret_from_fork+0x24/0x30 [ 58.922240][ T12] Kernel Offset: disabled [ 58.926572][ T12] Rebooting in 86400 seconds..