[ 47.695715] audit: type=1800 audit(1555346554.855:26): pid=5405 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2490 res=0 [ 47.715395] audit: type=1800 audit(1555346554.855:27): pid=5405 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2469 res=0 [ 47.715418] audit: type=1800 audit(1555346554.855:28): pid=5405 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2450 res=0 [....] Starting periodic command scheduler: cron[?25l[?1c7[ ok 8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[?25l[?1c7[ ok 8[?25h[?0c. [ 48.585844] audit: type=1800 audit(1555346555.765:29): pid=5405 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2465 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.12' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 58.276461] IPVS: ftp: loaded support on port[0] = 21 [ 58.573933] usb 1-1: new high-speed USB device number 2 using dummy_hcd [ 58.813866] usb 1-1: Using ep0 maxpacket: 8 [ 58.933968] usb 1-1: config 0 has an invalid interface number: 157 but max is 0 [ 58.941549] usb 1-1: config 0 has no interface number 0 [ 58.947034] usb 1-1: New USB device found, idVendor=04fa, idProduct=2490, bcdDevice=f5.2f [ 58.955429] usb 1-1: New USB device strings: Mfr=0, Product=0, SerialNumber=0 [ 58.964952] usb 1-1: config 0 descriptor?? [ 59.194074] ================================================================== [ 59.201583] BUG: KASAN: use-after-free in ds_probe+0x604/0x760 [ 59.207542] Read of size 1 at addr ffff88821a8d86e2 by task kworker/0:1/12 [ 59.214533] [ 59.216152] CPU: 0 PID: 12 Comm: kworker/0:1 Not tainted 5.1.0-rc4-319354-g9a33b36 #3 [ 59.224124] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.233480] Workqueue: usb_hub_wq hub_event [ 59.237808] Call Trace: [ 59.240392] dump_stack+0xe8/0x16e [ 59.243930] ? ds_probe+0x604/0x760 [ 59.247557] ? ds_probe+0x604/0x760 [ 59.251171] print_address_description+0x6c/0x236 [ 59.255999] ? ds_probe+0x604/0x760 [ 59.259634] ? ds_probe+0x604/0x760 [ 59.263246] kasan_report.cold+0x1a/0x3c [ 59.267299] ? ds_probe+0x604/0x760 [ 59.270916] ds_probe+0x604/0x760 [ 59.274359] usb_probe_interface+0x31d/0x820 [ 59.278773] ? usb_probe_device+0x150/0x150 [ 59.283083] really_probe+0x2da/0xb10 [ 59.286875] driver_probe_device+0x21d/0x350 [ 59.291272] __device_attach_driver+0x1d8/0x290 [ 59.295931] ? driver_allows_async_probing+0x160/0x160 [ 59.301203] bus_for_each_drv+0x163/0x1e0 [ 59.305346] ? bus_rescan_devices+0x30/0x30 [ 59.309654] ? _raw_spin_unlock_irqrestore+0x4b/0x60 [ 59.314744] ? lockdep_hardirqs_on+0x37e/0x580 [ 59.319318] __device_attach+0x223/0x3a0 [ 59.323368] ? device_bind_driver+0xe0/0xe0 [ 59.327683] ? kobject_uevent_env+0x295/0x13d0 [ 59.332252] bus_probe_device+0x1f1/0x2a0 [ 59.336412] ? blocking_notifier_call_chain+0x59/0xb0 [ 59.341593] device_add+0xad2/0x16e0 [ 59.345300] ? get_device_parent.isra.0+0x560/0x560 [ 59.350331] ? _raw_spin_unlock_irqrestore+0x4b/0x60 [ 59.355428] usb_set_configuration+0xdf7/0x1740 [ 59.360090] generic_probe+0xa2/0xda [ 59.363821] usb_probe_device+0xc0/0x150 [ 59.367882] ? usb_suspend+0x5f0/0x5f0 [ 59.371930] really_probe+0x2da/0xb10 [ 59.375736] driver_probe_device+0x21d/0x350 [ 59.380133] __device_attach_driver+0x1d8/0x290 [ 59.384808] ? driver_allows_async_probing+0x160/0x160 [ 59.390077] bus_for_each_drv+0x163/0x1e0 [ 59.394209] ? bus_rescan_devices+0x30/0x30 [ 59.398537] ? _raw_spin_unlock_irqrestore+0x4b/0x60 [ 59.403644] ? lockdep_hardirqs_on+0x37e/0x580 [ 59.408213] __device_attach+0x223/0x3a0 [ 59.412380] ? device_bind_driver+0xe0/0xe0 [ 59.416694] ? kobject_uevent_env+0x295/0x13d0 [ 59.421264] bus_probe_device+0x1f1/0x2a0 [ 59.425397] ? blocking_notifier_call_chain+0x59/0xb0 [ 59.430572] device_add+0xad2/0x16e0 [ 59.434274] ? get_device_parent.isra.0+0x560/0x560 [ 59.439283] usb_new_device.cold+0x537/0xccf [ 59.443692] hub_event+0x138e/0x3b00 [ 59.447415] ? hub_port_debounce+0x350/0x350 [ 59.451818] ? _raw_spin_unlock_irq+0x29/0x40 [ 59.456323] process_one_work+0x90f/0x1580 [ 59.460544] ? wq_pool_ids_show+0x300/0x300 [ 59.464856] ? do_raw_spin_lock+0x11f/0x290 [ 59.469163] worker_thread+0x9b/0xe20 [ 59.472951] ? process_one_work+0x1580/0x1580 [ 59.477430] kthread+0x313/0x420 [ 59.480778] ? kthread_park+0x1a0/0x1a0 [ 59.484746] ret_from_fork+0x3a/0x50 [ 59.488476] [ 59.490088] Allocated by task 12: [ 59.493537] __kasan_kmalloc.constprop.0+0xbf/0xd0 [ 59.498453] kobject_get_path+0xb7/0x200 [ 59.502496] kobject_uevent_env+0x23f/0x13d0 [ 59.506922] device_add+0xaca/0x16e0 [ 59.510626] usb_set_configuration+0xdf7/0x1740 [ 59.515315] generic_probe+0xa2/0xda [ 59.519015] usb_probe_device+0xc0/0x150 [ 59.523057] really_probe+0x2da/0xb10 [ 59.526863] driver_probe_device+0x21d/0x350 [ 59.531255] __device_attach_driver+0x1d8/0x290 [ 59.535909] bus_for_each_drv+0x163/0x1e0 [ 59.540040] __device_attach+0x223/0x3a0 [ 59.544106] bus_probe_device+0x1f1/0x2a0 [ 59.548243] device_add+0xad2/0x16e0 [ 59.551939] usb_new_device.cold+0x537/0xccf [ 59.556331] hub_event+0x138e/0x3b00 [ 59.560028] process_one_work+0x90f/0x1580 [ 59.564276] worker_thread+0x9b/0xe20 [ 59.568085] kthread+0x313/0x420 [ 59.571437] ret_from_fork+0x3a/0x50 [ 59.575127] [ 59.576739] Freed by task 12: [ 59.579846] __kasan_slab_free+0x130/0x180 [ 59.584071] slab_free_freelist_hook+0x5e/0x140 [ 59.588763] kfree+0xce/0x290 [ 59.591854] kobject_uevent_env+0x287/0x13d0 [ 59.596268] device_add+0xaca/0x16e0 [ 59.599983] usb_set_configuration+0xdf7/0x1740 [ 59.604634] generic_probe+0xa2/0xda [ 59.608335] usb_probe_device+0xc0/0x150 [ 59.612377] really_probe+0x2da/0xb10 [ 59.616167] driver_probe_device+0x21d/0x350 [ 59.620667] __device_attach_driver+0x1d8/0x290 [ 59.625329] bus_for_each_drv+0x163/0x1e0 [ 59.629459] __device_attach+0x223/0x3a0 [ 59.633502] bus_probe_device+0x1f1/0x2a0 [ 59.637636] device_add+0xad2/0x16e0 [ 59.641357] usb_new_device.cold+0x537/0xccf [ 59.645758] hub_event+0x138e/0x3b00 [ 59.649453] process_one_work+0x90f/0x1580 [ 59.653669] worker_thread+0x9b/0xe20 [ 59.657452] kthread+0x313/0x420 [ 59.660806] ret_from_fork+0x3a/0x50 [ 59.664509] [ 59.666122] The buggy address belongs to the object at ffff88821a8d86c0 [ 59.666122] which belongs to the cache kmalloc-64 of size 64 [ 59.678589] The buggy address is located 34 bytes inside of [ 59.678589] 64-byte region [ffff88821a8d86c0, ffff88821a8d8700) [ 59.690278] The buggy address belongs to the page: [ 59.695206] page:ffffea00086a3600 count:1 mapcount:0 mapping:ffff88812c3f5600 index:0x0 [ 59.703337] flags: 0x57ff00000000200(slab) [ 59.707560] raw: 057ff00000000200 dead000000000100 dead000000000200 ffff88812c3f5600 [ 59.715434] raw: 0000000000000000 00000000802a002a 00000001ffffffff 0000000000000000 [ 59.723309] page dumped because: kasan: bad access detected [ 59.729014] [ 59.730620] Memory state around the buggy address: [ 59.735531] ffff88821a8d8580: fc fc fc fc fb fb fb fb fb fb fb fb fc fc fc fc [ 59.742892] ffff88821a8d8600: fb fb fb fb fb fb fb fb fc fc fc fc 00 00 00 00 [ 59.750262] >ffff88821a8d8680: 00 00 fc fc fc fc fc fc fb fb fb fb fb fb fb fb [ 59.757607] ^ [ 59.764105] ffff88821a8d8700: fc fc fc fc fb fb fb fb fb fb fb fb fc fc fc fc [ 59.771452] ffff88821a8d8780: 00 00 00 00 00 00 00 00 fc fc fc fc fb fb fb fb [ 59.778795] ================================================================== [ 59.786135] Disabling lock debugging due to kernel taint [ 59.791877] Kernel panic - not syncing: panic_on_warn set ... [ 59.797779] CPU: 0 PID: 12 Comm: kworker/0:1 Tainted: G B 5.1.0-rc4-319354-g9a33b36 #3 [ 59.807127] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 59.816488] Workqueue: usb_hub_wq hub_event [ 59.820800] Call Trace: [ 59.823389] dump_stack+0xe8/0x16e [ 59.826928] panic+0x29d/0x5f2 [ 59.830115] ? __warn_printk+0xf8/0xf8 [ 59.833998] ? retint_kernel+0x10/0x10 [ 59.837889] ? trace_hardirqs_on+0x55/0x1c0 [ 59.842215] ? ds_probe+0x604/0x760 [ 59.845840] end_report+0x48/0x4e [ 59.849287] ? ds_probe+0x604/0x760 [ 59.852912] kasan_report.cold+0xd/0x3c [ 59.856898] ? ds_probe+0x604/0x760 [ 59.860523] ds_probe+0x604/0x760 [ 59.863979] usb_probe_interface+0x31d/0x820 [ 59.868389] ? usb_probe_device+0x150/0x150 [ 59.872708] really_probe+0x2da/0xb10 [ 59.876523] driver_probe_device+0x21d/0x350 [ 59.880956] __device_attach_driver+0x1d8/0x290 [ 59.885630] ? driver_allows_async_probing+0x160/0x160 [ 59.890912] bus_for_each_drv+0x163/0x1e0 [ 59.895080] ? bus_rescan_devices+0x30/0x30 [ 59.899416] ? _raw_spin_unlock_irqrestore+0x4b/0x60 [ 59.904544] ? lockdep_hardirqs_on+0x37e/0x580 [ 59.909125] __device_attach+0x223/0x3a0 [ 59.913178] ? device_bind_driver+0xe0/0xe0 [ 59.917521] ? kobject_uevent_env+0x295/0x13d0 [ 59.922121] bus_probe_device+0x1f1/0x2a0 [ 59.926270] ? blocking_notifier_call_chain+0x59/0xb0 [ 59.931482] device_add+0xad2/0x16e0 [ 59.935197] ? get_device_parent.isra.0+0x560/0x560 [ 59.940236] ? _raw_spin_unlock_irqrestore+0x4b/0x60 [ 59.945343] usb_set_configuration+0xdf7/0x1740 [ 59.950022] generic_probe+0xa2/0xda [ 59.953742] usb_probe_device+0xc0/0x150 [ 59.957817] ? usb_suspend+0x5f0/0x5f0 [ 59.961703] really_probe+0x2da/0xb10 [ 59.965502] driver_probe_device+0x21d/0x350 [ 59.969916] __device_attach_driver+0x1d8/0x290 [ 59.974677] ? driver_allows_async_probing+0x160/0x160 [ 59.979962] bus_for_each_drv+0x163/0x1e0 [ 59.984114] ? bus_rescan_devices+0x30/0x30 [ 59.988441] ? _raw_spin_unlock_irqrestore+0x4b/0x60 [ 59.993547] ? lockdep_hardirqs_on+0x37e/0x580 [ 59.998136] __device_attach+0x223/0x3a0 [ 60.002199] ? device_bind_driver+0xe0/0xe0 [ 60.006524] ? kobject_uevent_env+0x295/0x13d0 [ 60.011112] bus_probe_device+0x1f1/0x2a0 [ 60.015281] ? blocking_notifier_call_chain+0x59/0xb0 [ 60.020473] device_add+0xad2/0x16e0 [ 60.024189] ? get_device_parent.isra.0+0x560/0x560 [ 60.029232] usb_new_device.cold+0x537/0xccf [ 60.033638] hub_event+0x138e/0x3b00 [ 60.037375] ? hub_port_debounce+0x350/0x350 [ 60.041792] ? _raw_spin_unlock_irq+0x29/0x40 [ 60.046320] process_one_work+0x90f/0x1580 [ 60.050559] ? wq_pool_ids_show+0x300/0x300 [ 60.054879] ? do_raw_spin_lock+0x11f/0x290 [ 60.059312] worker_thread+0x9b/0xe20 [ 60.063120] ? process_one_work+0x1580/0x1580 [ 60.067609] kthread+0x313/0x420 [ 60.070970] ? kthread_park+0x1a0/0x1a0 [ 60.074961] ret_from_fork+0x3a/0x50 [ 60.079554] Kernel Offset: disabled [ 60.083187] Rebooting in 86400 seconds..