[ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... [ OK ] Started Update UTMP about System Runlevel Changes. Starting Load/Save RF Kill Switch Status... [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.0.100' (ECDSA) to the list of known hosts. syzkaller login: [ 63.517917][ T6831] IPVS: ftp: loaded support on port[0] = 21 executing program [ 64.634283][ T1531] ================================================================== [ 64.642525][ T1531] BUG: KASAN: slab-out-of-bounds in hci_extended_inquiry_result_evt.isra.0+0x1be/0x5e0 [ 64.652142][ T1531] Read of size 6 at addr ffff8880a62b2208 by task kworker/u5:0/1531 [ 64.660092][ T1531] [ 64.662408][ T1531] CPU: 1 PID: 1531 Comm: kworker/u5:0 Not tainted 5.8.0-syzkaller #0 [ 64.670447][ T1531] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 64.680515][ T1531] Workqueue: hci0 hci_rx_work [ 64.685169][ T1531] Call Trace: [ 64.688443][ T1531] dump_stack+0x18f/0x20d [ 64.692757][ T1531] ? hci_extended_inquiry_result_evt.isra.0+0x1be/0x5e0 [ 64.699672][ T1531] ? hci_extended_inquiry_result_evt.isra.0+0x1be/0x5e0 [ 64.706589][ T1531] print_address_description.constprop.0.cold+0xae/0x436 [ 64.713594][ T1531] ? lockdep_hardirqs_off+0x66/0xa0 [ 64.718774][ T1531] ? vprintk_func+0x97/0x1a6 [ 64.723349][ T1531] ? hci_extended_inquiry_result_evt.isra.0+0x1be/0x5e0 [ 64.730261][ T1531] kasan_report.cold+0x1f/0x37 [ 64.735008][ T1531] ? hci_extended_inquiry_result_evt.isra.0+0x1be/0x5e0 [ 64.741927][ T1531] check_memory_region+0x13d/0x180 [ 64.747027][ T1531] memcpy+0x20/0x60 [ 64.750908][ T1531] hci_extended_inquiry_result_evt.isra.0+0x1be/0x5e0 [ 64.757656][ T1531] ? clear_pending_adv_report+0xf0/0xf0 [ 64.763189][ T1531] hci_event_packet+0x2828/0x86f5 [ 64.768196][ T1531] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 64.774160][ T1531] ? hci_cmd_complete_evt+0xc6e0/0xc6e0 [ 64.779692][ T1531] ? lock_acquire+0x1f1/0xad0 [ 64.784349][ T1531] ? skb_dequeue+0x1c/0x180 [ 64.788830][ T1531] ? find_held_lock+0x2d/0x110 [ 64.793573][ T1531] ? mark_lock+0xbc/0x1710 [ 64.797985][ T1531] ? mark_held_locks+0x9f/0xe0 [ 64.802730][ T1531] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 64.808515][ T1531] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 64.814473][ T1531] ? trace_hardirqs_on+0x5f/0x220 [ 64.819494][ T1531] ? lockdep_hardirqs_on+0x6a/0xe0 [ 64.824590][ T1531] hci_rx_work+0x22e/0xb10 [ 64.829010][ T1531] process_one_work+0x94c/0x1670 [ 64.833936][ T1531] ? lock_release+0x8d0/0x8d0 [ 64.838594][ T1531] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 64.843950][ T1531] ? rwlock_bug.part.0+0x90/0x90 [ 64.848866][ T1531] ? lockdep_hardirqs_off+0x66/0xa0 [ 64.854055][ T1531] worker_thread+0x64c/0x1120 [ 64.858719][ T1531] ? process_one_work+0x1670/0x1670 [ 64.863897][ T1531] kthread+0x3b5/0x4a0 [ 64.867943][ T1531] ? __kthread_bind_mask+0xc0/0xc0 [ 64.873033][ T1531] ? __kthread_bind_mask+0xc0/0xc0 [ 64.878127][ T1531] ret_from_fork+0x1f/0x30 [ 64.882526][ T1531] [ 64.884833][ T1531] Allocated by task 6831: [ 64.889143][ T1531] save_stack+0x1b/0x40 [ 64.893275][ T1531] __kasan_kmalloc.constprop.0+0xc2/0xd0 [ 64.898883][ T1531] __alloc_skb+0xae/0x550 [ 64.903189][ T1531] vhci_write+0xbd/0x450 [ 64.907409][ T1531] new_sync_write+0x422/0x650 [ 64.912096][ T1531] vfs_write+0x59d/0x6b0 [ 64.916315][ T1531] ksys_write+0x12d/0x250 [ 64.920622][ T1531] do_syscall_64+0x60/0xe0 [ 64.925035][ T1531] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.930901][ T1531] [ 64.933210][ T1531] Freed by task 6653: [ 64.937185][ T1531] save_stack+0x1b/0x40 [ 64.941316][ T1531] __kasan_slab_free+0xf5/0x140 [ 64.946147][ T1531] kfree+0x103/0x2c0 [ 64.950109][ T1531] load_elf_binary+0x356b/0x4831 [ 64.955026][ T1531] __do_execve_file+0x1652/0x2ee0 [ 64.960027][ T1531] do_execve+0x35/0x50 [ 64.964072][ T1531] __x64_sys_execve+0x7c/0xa0 [ 64.968727][ T1531] do_syscall_64+0x60/0xe0 [ 64.973121][ T1531] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 64.978985][ T1531] [ 64.981294][ T1531] The buggy address belongs to the object at ffff8880a62b2000 [ 64.981294][ T1531] which belongs to the cache kmalloc-512 of size 512 [ 64.995409][ T1531] The buggy address is located 8 bytes to the right of [ 64.995409][ T1531] 512-byte region [ffff8880a62b2000, ffff8880a62b2200) [ 65.008998][ T1531] The buggy address belongs to the page: [ 65.014621][ T1531] page:ffffea000298ac80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 [ 65.023713][ T1531] flags: 0xfffe0000000200(slab) [ 65.028547][ T1531] raw: 00fffe0000000200 ffffea0002735e48 ffffea00025e3f88 ffff8880aa000a80 [ 65.037127][ T1531] raw: 0000000000000000 ffff8880a62b2000 0000000100000004 0000000000000000 [ 65.045689][ T1531] page dumped because: kasan: bad access detected [ 65.052083][ T1531] [ 65.054385][ T1531] Memory state around the buggy address: [ 65.059994][ T1531] ffff8880a62b2100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 65.068046][ T1531] ffff8880a62b2180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 65.076519][ T1531] >ffff8880a62b2200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.084553][ T1531] ^ [ 65.088862][ T1531] ffff8880a62b2280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.096901][ T1531] ffff8880a62b2300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 65.104936][ T1531] ================================================================== [ 65.112975][ T1531] Disabling lock debugging due to kernel taint [ 65.136308][ T1531] Kernel panic - not syncing: panic_on_warn set ... [ 65.142927][ T1531] CPU: 1 PID: 1531 Comm: kworker/u5:0 Tainted: G B 5.8.0-syzkaller #0 [ 65.152365][ T1531] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 65.162420][ T1531] Workqueue: hci0 hci_rx_work [ 65.167086][ T1531] Call Trace: [ 65.170366][ T1531] dump_stack+0x18f/0x20d [ 65.174699][ T1531] ? hci_extended_inquiry_result_evt.isra.0+0xc0/0x5e0 [ 65.181630][ T1531] panic+0x2e3/0x75c [ 65.185522][ T1531] ? __warn_printk+0xf3/0xf3 [ 65.190173][ T1531] ? preempt_schedule_common+0x59/0xc0 [ 65.195628][ T1531] ? hci_extended_inquiry_result_evt.isra.0+0x1be/0x5e0 [ 65.202558][ T1531] ? preempt_schedule_thunk+0x16/0x18 [ 65.207924][ T1531] ? trace_hardirqs_on+0x55/0x220 [ 65.212968][ T1531] ? hci_extended_inquiry_result_evt.isra.0+0x1be/0x5e0 [ 65.219902][ T1531] ? hci_extended_inquiry_result_evt.isra.0+0x1be/0x5e0 [ 65.226830][ T1531] end_report+0x4d/0x53 [ 65.230981][ T1531] kasan_report.cold+0xd/0x37 [ 65.235656][ T1531] ? hci_extended_inquiry_result_evt.isra.0+0x1be/0x5e0 [ 65.242643][ T1531] check_memory_region+0x13d/0x180 [ 65.247724][ T1531] memcpy+0x20/0x60 [ 65.251625][ T1531] hci_extended_inquiry_result_evt.isra.0+0x1be/0x5e0 [ 65.258369][ T1531] ? clear_pending_adv_report+0xf0/0xf0 [ 65.263884][ T1531] hci_event_packet+0x2828/0x86f5 [ 65.268879][ T1531] ? lockdep_hardirqs_on_prepare+0x590/0x590 [ 65.274880][ T1531] ? hci_cmd_complete_evt+0xc6e0/0xc6e0 [ 65.280397][ T1531] ? lock_acquire+0x1f1/0xad0 [ 65.285077][ T1531] ? skb_dequeue+0x1c/0x180 [ 65.289549][ T1531] ? find_held_lock+0x2d/0x110 [ 65.294403][ T1531] ? mark_lock+0xbc/0x1710 [ 65.298827][ T1531] ? mark_held_locks+0x9f/0xe0 [ 65.303559][ T1531] ? _raw_spin_unlock_irqrestore+0x62/0xe0 [ 65.309334][ T1531] ? lockdep_hardirqs_on_prepare+0x3a2/0x590 [ 65.315326][ T1531] ? trace_hardirqs_on+0x5f/0x220 [ 65.320324][ T1531] ? lockdep_hardirqs_on+0x6a/0xe0 [ 65.325425][ T1531] hci_rx_work+0x22e/0xb10 [ 65.329819][ T1531] process_one_work+0x94c/0x1670 [ 65.334728][ T1531] ? lock_release+0x8d0/0x8d0 [ 65.339380][ T1531] ? pwq_dec_nr_in_flight+0x2d0/0x2d0 [ 65.344812][ T1531] ? rwlock_bug.part.0+0x90/0x90 [ 65.355405][ T1531] ? lockdep_hardirqs_off+0x66/0xa0 [ 65.360575][ T1531] worker_thread+0x64c/0x1120 [ 65.365225][ T1531] ? process_one_work+0x1670/0x1670 [ 65.370393][ T1531] kthread+0x3b5/0x4a0 [ 65.374446][ T1531] ? __kthread_bind_mask+0xc0/0xc0 [ 65.379535][ T1531] ? __kthread_bind_mask+0xc0/0xc0 [ 65.384680][ T1531] ret_from_fork+0x1f/0x30 [ 65.390234][ T1531] Kernel Offset: disabled [ 65.394680][ T1531] Rebooting in 86400 seconds..