[ 35.936932][ T26] audit: type=1800 audit(1556765368.580:27): pid=7511 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 35.956762][ T26] audit: type=1800 audit(1556765368.580:28): pid=7511 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="ssh" dev="sda1" ino=2417 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. [ 36.858889][ T26] audit: type=1800 audit(1556765369.560:29): pid=7511 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 36.878543][ T26] audit: type=1800 audit(1556765369.560:30): pid=7511 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.188' (ECDSA) to the list of known hosts. executing program executing program executing program executing program syzkaller login: [ 46.290086][ T7666] IPVS: ftp: loaded support on port[0] = 21 executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 57.823208][ T7668] ================================================================== [ 57.831411][ T7668] BUG: KASAN: slab-out-of-bounds in bacpy+0x23/0x30 [ 57.837975][ T7668] Read of size 6 at addr ffff8880a82ffe7b by task kworker/u5:1/7668 [ 57.845924][ T7668] [ 57.848237][ T7668] CPU: 0 PID: 7668 Comm: kworker/u5:1 Not tainted 5.1.0-rc7+ #96 [ 57.855924][ T7668] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.865969][ T7668] Workqueue: hci0 hci_rx_work [ 57.870642][ T7668] Call Trace: [ 57.873915][ T7668] dump_stack+0x172/0x1f0 [ 57.878223][ T7668] ? bacpy+0x23/0x30 [ 57.882099][ T7668] print_address_description.cold+0x7c/0x20d [ 57.888055][ T7668] ? bacpy+0x23/0x30 [ 57.891924][ T7668] ? bacpy+0x23/0x30 [ 57.895797][ T7668] kasan_report.cold+0x1b/0x40 [ 57.900544][ T7668] ? hci_remove_remote_oob_data+0xe0/0x1a0 [ 57.906332][ T7668] ? bacpy+0x23/0x30 [ 57.910205][ T7668] check_memory_region+0x123/0x190 [ 57.915294][ T7668] memcpy+0x24/0x50 [ 57.919088][ T7668] bacpy+0x23/0x30 [ 57.922788][ T7668] hci_event_packet+0x4e86/0xaabf [ 57.927791][ T7668] ? graph_lock+0x7b/0x200 [ 57.932211][ T7668] ? __lockdep_reset_lock+0x450/0x450 [ 57.937586][ T7668] ? hci_cmd_complete_evt+0xbe90/0xbe90 [ 57.943126][ T7668] ? __lock_acquire+0x2340/0x3fb0 [ 57.948137][ T7668] ? skb_dequeue+0x12e/0x180 [ 57.952706][ T7668] ? find_held_lock+0x35/0x130 [ 57.957455][ T7668] ? skb_dequeue+0x12e/0x180 [ 57.962040][ T7668] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 57.967820][ T7668] ? skb_dequeue+0x12e/0x180 [ 57.972388][ T7668] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 57.978168][ T7668] ? lockdep_hardirqs_on+0x418/0x5d0 [ 57.983440][ T7668] ? trace_hardirqs_on+0x67/0x230 [ 57.988445][ T7668] ? kasan_check_read+0x11/0x20 [ 57.993279][ T7668] hci_rx_work+0x440/0xaa0 [ 57.997669][ T7668] ? hci_rx_work+0x440/0xaa0 [ 58.002244][ T7668] process_one_work+0x98e/0x1790 [ 58.007162][ T7668] ? pwq_dec_nr_in_flight+0x320/0x320 [ 58.012507][ T7668] ? lock_acquire+0x16f/0x3f0 [ 58.017283][ T7668] worker_thread+0x98/0xe40 [ 58.021779][ T7668] kthread+0x357/0x430 [ 58.025833][ T7668] ? process_one_work+0x1790/0x1790 [ 58.031014][ T7668] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 58.037326][ T7668] ret_from_fork+0x3a/0x50 [ 58.041721][ T7668] [ 58.044122][ T7668] Allocated by task 7858: [ 58.048453][ T7668] save_stack+0x45/0xd0 [ 58.052599][ T7668] __kasan_kmalloc.constprop.0+0xcf/0xe0 [ 58.058210][ T7668] kasan_kmalloc+0x9/0x10 [ 58.062572][ T7668] __kmalloc_node_track_caller+0x4e/0x70 [ 58.068197][ T7668] __kmalloc_reserve.isra.0+0x40/0xf0 [ 58.073551][ T7668] __alloc_skb+0x10b/0x5e0 [ 58.077956][ T7668] vhci_write+0xc4/0x470 [ 58.082175][ T7668] new_sync_write+0x4c7/0x760 [ 58.086828][ T7668] __vfs_write+0xe4/0x110 [ 58.091133][ T7668] vfs_write+0x20c/0x580 [ 58.095349][ T7668] ksys_write+0x14f/0x2d0 [ 58.099652][ T7668] __x64_sys_write+0x73/0xb0 [ 58.104216][ T7668] do_syscall_64+0x103/0x610 [ 58.108798][ T7668] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 58.114667][ T7668] [ 58.116977][ T7668] Freed by task 6425: [ 58.120943][ T7668] save_stack+0x45/0xd0 [ 58.125075][ T7668] __kasan_slab_free+0x102/0x150 [ 58.129992][ T7668] kasan_slab_free+0xe/0x10 [ 58.134474][ T7668] kfree+0xcf/0x230 [ 58.138317][ T7668] free_bprm+0x1b6/0x220 [ 58.142561][ T7668] __do_execve_file.isra.0+0x1bea/0x23f0 [ 58.148174][ T7668] __x64_sys_execve+0x8f/0xc0 [ 58.152838][ T7668] do_syscall_64+0x103/0x610 [ 58.157417][ T7668] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 58.163369][ T7668] [ 58.165709][ T7668] The buggy address belongs to the object at ffff8880a82ffc80 [ 58.165709][ T7668] which belongs to the cache kmalloc-512 of size 512 [ 58.179741][ T7668] The buggy address is located 507 bytes inside of [ 58.179741][ T7668] 512-byte region [ffff8880a82ffc80, ffff8880a82ffe80) [ 58.192989][ T7668] The buggy address belongs to the page: [ 58.198600][ T7668] page:ffffea0002a0bfc0 count:1 mapcount:0 mapping:ffff8880aa400940 index:0x0 [ 58.207428][ T7668] flags: 0x1fffc0000000200(slab) [ 58.212353][ T7668] raw: 01fffc0000000200 ffffea0002a0c088 ffffea0002a14948 ffff8880aa400940 [ 58.220924][ T7668] raw: 0000000000000000 ffff8880a82ff000 0000000100000006 0000000000000000 [ 58.229483][ T7668] page dumped because: kasan: bad access detected [ 58.235867][ T7668] [ 58.238175][ T7668] Memory state around the buggy address: [ 58.243783][ T7668] ffff8880a82ffd80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 58.251820][ T7668] ffff8880a82ffe00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 58.259869][ T7668] >ffff8880a82ffe80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 58.267907][ T7668] ^ [ 58.271954][ T7668] ffff8880a82fff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 58.279991][ T7668] ffff8880a82fff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 58.288026][ T7668] ================================================================== [ 58.296111][ T7668] Disabling lock debugging due to kernel taint [ 58.303009][ T7668] Kernel panic - not syncing: panic_on_warn set ... [ 58.309595][ T7668] CPU: 0 PID: 7668 Comm: kworker/u5:1 Tainted: G B 5.1.0-rc7+ #96 [ 58.318773][ T7668] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 58.328823][ T7668] Workqueue: hci0 hci_rx_work [ 58.333473][ T7668] Call Trace: [ 58.336749][ T7668] dump_stack+0x172/0x1f0 [ 58.341063][ T7668] panic+0x2cb/0x65c [ 58.344934][ T7668] ? __warn_printk+0xf3/0xf3 [ 58.349501][ T7668] ? bacpy+0x23/0x30 [ 58.353379][ T7668] ? preempt_schedule+0x4b/0x60 [ 58.358209][ T7668] ? ___preempt_schedule+0x16/0x18 [ 58.363298][ T7668] ? trace_hardirqs_on+0x5e/0x230 [ 58.368360][ T7668] ? bacpy+0x23/0x30 [ 58.372240][ T7668] end_report+0x47/0x4f [ 58.376373][ T7668] ? bacpy+0x23/0x30 [ 58.380252][ T7668] kasan_report.cold+0xe/0x40 [ 58.384911][ T7668] ? hci_remove_remote_oob_data+0xe0/0x1a0 [ 58.390691][ T7668] ? bacpy+0x23/0x30 [ 58.394573][ T7668] check_memory_region+0x123/0x190 [ 58.399672][ T7668] memcpy+0x24/0x50 [ 58.403468][ T7668] bacpy+0x23/0x30 [ 58.407166][ T7668] hci_event_packet+0x4e86/0xaabf [ 58.412171][ T7668] ? graph_lock+0x7b/0x200 [ 58.416565][ T7668] ? __lockdep_reset_lock+0x450/0x450 [ 58.421913][ T7668] ? hci_cmd_complete_evt+0xbe90/0xbe90 [ 58.427434][ T7668] ? __lock_acquire+0x2340/0x3fb0 [ 58.432438][ T7668] ? skb_dequeue+0x12e/0x180 [ 58.437005][ T7668] ? find_held_lock+0x35/0x130 [ 58.441757][ T7668] ? skb_dequeue+0x12e/0x180 [ 58.446335][ T7668] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 58.452116][ T7668] ? skb_dequeue+0x12e/0x180 [ 58.456791][ T7668] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 58.462583][ T7668] ? lockdep_hardirqs_on+0x418/0x5d0 [ 58.467853][ T7668] ? trace_hardirqs_on+0x67/0x230 [ 58.472855][ T7668] ? kasan_check_read+0x11/0x20 [ 58.477695][ T7668] hci_rx_work+0x440/0xaa0 [ 58.482092][ T7668] ? hci_rx_work+0x440/0xaa0 [ 58.486776][ T7668] process_one_work+0x98e/0x1790 [ 58.491705][ T7668] ? pwq_dec_nr_in_flight+0x320/0x320 [ 58.497057][ T7668] ? lock_acquire+0x16f/0x3f0 [ 58.501716][ T7668] worker_thread+0x98/0xe40 [ 58.506203][ T7668] kthread+0x357/0x430 [ 58.510249][ T7668] ? process_one_work+0x1790/0x1790 [ 58.515426][ T7668] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 58.521662][ T7668] ret_from_fork+0x3a/0x50 [ 58.527121][ T7668] Kernel Offset: disabled [ 58.531447][ T7668] Rebooting in 86400 seconds..