Starting getty on tty2-tty6 if dbus and logind are not available... [ OK ] Started Daily apt download activities. Starting Permit User Sessions... Starting OpenBSD Secure Shell server... [ OK ] Started Daily apt upgrade and clean activities. [ OK ] Reached target Timers. [ OK ] Started System Logging Service. [ OK ] Started Permit User Sessions. [ OK ] Started OpenBSD Secure Shell server. [ OK ] Started getty on tty2-tty6 if dbus and logind are not available. [ OK ] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch. [ OK ] Started Getty on tty6. [ OK ] Started Getty on tty5. [ OK ] Started Getty on tty4. [ OK ] Started Getty on tty3. [ OK ] Started Getty on tty2. [ OK ] Started Serial Getty on ttyS0. [ OK ] Started Getty on tty1. [ OK ] Reached target Login Prompts. [ OK ] Reached target Multi-User System. [ OK ] Reached target Graphical Interface. Starting Update UTMP about System Runlevel Changes... Starting Load/Save RF Kill Switch Status... [ OK ] Started Update UTMP about System Runlevel Changes. [ OK ] Started Load/Save RF Kill Switch Status. Debian GNU/Linux 9 syzkaller ttyS0 Warning: Permanently added '10.128.1.34' (ECDSA) to the list of known hosts. syzkaller login: [ 66.940407][ T28] audit: type=1400 audit(1596605215.661:8): avc: denied { execmem } for pid=6842 comm="syz-executor963" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1 [ 66.965519][ T6851] IPVS: ftp: loaded support on port[0] = 21 [ 66.978548][ T6852] IPVS: ftp: loaded support on port[0] = 21 [ 66.980802][ T6850] IPVS: ftp: loaded support on port[0] = 21 [ 66.996118][ T6849] IPVS: ftp: loaded support on port[0] = 21 [ 66.996145][ T6853] IPVS: ftp: loaded support on port[0] = 21 [ 67.006572][ T6854] 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 [ 70.251525][ T12] Bluetooth: hci0: command 0x0409 tx timeout [ 70.261487][ T33] Bluetooth: hci1: command 0x0409 tx timeout [ 70.330878][ T12] Bluetooth: hci2: command 0x0409 tx timeout [ 70.337114][ T12] Bluetooth: hci3: command 0x0409 tx timeout [ 70.343934][ T12] Bluetooth: hci5: command 0x0409 tx timeout [ 70.350029][ T12] Bluetooth: hci4: command 0x0409 tx timeout [ 72.330684][ T33] Bluetooth: hci0: command 0x041b tx timeout [ 72.330690][ T12] Bluetooth: hci1: command 0x041b tx timeout [ 72.410798][ T12] Bluetooth: hci4: command 0x041b tx timeout [ 72.417256][ T12] Bluetooth: hci5: command 0x041b tx timeout [ 72.423421][ T12] Bluetooth: hci3: command 0x041b tx timeout [ 72.429500][ T12] Bluetooth: hci2: command 0x041b tx timeout executing program executing program executing program executing program executing program executing program executing program executing program executing program [ 73.204283][ T6987] ================================================================== [ 73.212473][ T6987] BUG: KASAN: use-after-free in sco_chan_del+0xe6/0x430 [ 73.219390][ T6987] Write of size 4 at addr ffff88808fab0010 by task syz-executor963/6987 [ 73.227686][ T6987] [ 73.229996][ T6987] CPU: 0 PID: 6987 Comm: syz-executor963 Not tainted 5.8.0-syzkaller #0 [ 73.238308][ T6987] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.248372][ T6987] Call Trace: executing program [ 73.251663][ T6987] dump_stack+0x18f/0x20d [ 73.255991][ T6987] ? sco_chan_del+0xe6/0x430 [ 73.260586][ T6987] ? sco_chan_del+0xe6/0x430 [ 73.265184][ T6987] ? __sock_release+0x280/0x280 [ 73.270041][ T6987] print_address_description.constprop.0.cold+0xae/0x436 [ 73.277070][ T6987] ? sco_chan_del+0xab/0x430 [ 73.281666][ T6987] ? vprintk_func+0x97/0x1a6 [ 73.286265][ T6987] ? sco_chan_del+0xe6/0x430 [ 73.290863][ T6987] kasan_report.cold+0x1f/0x37 [ 73.295635][ T6987] ? sco_chan_del+0xe6/0x430 [ 73.300236][ T6987] check_memory_region+0x13d/0x180 [ 73.305352][ T6987] sco_chan_del+0xe6/0x430 [ 73.309781][ T6987] __sco_sock_close+0x16e/0x5b0 [ 73.314639][ T6987] sco_sock_release+0x69/0x290 [ 73.319418][ T6987] __sock_release+0xcd/0x280 [ 73.324013][ T6987] sock_close+0x18/0x20 [ 73.328196][ T6987] __fput+0x33c/0x880 [ 73.332190][ T6987] task_work_run+0xdd/0x190 [ 73.336687][ T6987] do_exit+0xb72/0x2a40 [ 73.340837][ T6987] ? lock_acquire+0x1f1/0xad0 [ 73.345519][ T6987] ? find_held_lock+0x2d/0x110 [ 73.350283][ T6987] ? mm_update_next_owner+0x7a0/0x7a0 [ 73.355661][ T6987] ? get_signal+0x332/0x1ee0 [ 73.360259][ T6987] ? lock_downgrade+0x830/0x830 [ 73.365113][ T6987] ? lock_is_held_type+0xbb/0xf0 [ 73.370060][ T6987] do_group_exit+0x125/0x310 [ 73.374647][ T6987] get_signal+0x40b/0x1ee0 [ 73.379058][ T6987] ? sco_sock_connect+0x4e4/0x980 [ 73.384083][ T6987] ? trace_hardirqs_on+0x5f/0x220 [ 73.389120][ T6987] ? sco_sock_connect+0x4e4/0x980 [ 73.394147][ T6987] ? __local_bh_enable_ip+0xd1/0x190 [ 73.399419][ T6987] do_signal+0x82/0x2520 [ 73.403656][ T6987] ? sco_sock_release+0x290/0x290 [ 73.408688][ T6987] ? __sys_connect_file+0x4e/0x1a0 [ 73.413828][ T6987] ? copy_siginfo_to_user32+0xa0/0xa0 [ 73.419213][ T6987] ? __sys_connect_file+0x1a0/0x1a0 [ 73.424430][ T6987] ? lock_is_held_type+0xbb/0xf0 [ 73.429392][ T6987] ? __prepare_exit_to_usermode+0x9e/0x1c0 [ 73.435213][ T6987] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 73.441213][ T6987] __prepare_exit_to_usermode+0x128/0x1c0 [ 73.446946][ T6987] do_syscall_64+0x6c/0xe0 [ 73.451375][ T6987] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 73.457267][ T6987] RIP: 0033:0x446eb9 [ 73.465166][ T6987] Code: Bad RIP value. [ 73.469235][ T6987] RSP: 002b:00007fff22a9fea8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 73.477647][ T6987] RAX: fffffffffffffffc RBX: 0000000000000000 RCX: 0000000000446eb9 [ 73.485671][ T6987] RDX: 0000000000000008 RSI: 0000000020000080 RDI: 0000000000000004 [ 73.493636][ T6987] RBP: 0000000000000004 R08: 0000000000000002 R09: 00000000000100ff [ 73.501604][ T6987] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 [ 73.509572][ T6987] R13: 0000000000407b10 R14: 0000000000000000 R15: 0000000000000000 [ 73.517558][ T6987] [ 73.519889][ T6987] Allocated by task 6987: [ 73.524220][ T6987] save_stack+0x1b/0x40 [ 73.528382][ T6987] __kasan_kmalloc.constprop.0+0xc2/0xd0 [ 73.534020][ T6987] kmem_cache_alloc_trace+0x14f/0x2d0 [ 73.539395][ T6987] hci_conn_add+0x53/0x1340 [ 73.543908][ T6987] hci_connect_sco+0x350/0x860 [ 73.548684][ T6987] sco_sock_connect+0x308/0x980 [ 73.553537][ T6987] __sys_connect_file+0x155/0x1a0 [ 73.558551][ T6987] __sys_connect+0x160/0x190 [ 73.563135][ T6987] __x64_sys_connect+0x6f/0xb0 [ 73.567902][ T6987] do_syscall_64+0x60/0xe0 [ 73.572333][ T6987] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 73.578212][ T6987] [ 73.580537][ T6987] Freed by task 6986: [ 73.584512][ T6987] save_stack+0x1b/0x40 [ 73.588659][ T6987] __kasan_slab_free+0xf5/0x140 [ 73.593506][ T6987] kfree+0x103/0x2c0 [ 73.597404][ T6987] device_release+0x71/0x200 [ 73.601992][ T6987] kobject_put+0x1c0/0x270 [ 73.606398][ T6987] put_device+0x1b/0x30 [ 73.610546][ T6987] hci_conn_del+0x27e/0x6a0 [ 73.615050][ T6987] hci_phy_link_complete_evt.isra.0+0x508/0x790 [ 73.621291][ T6987] hci_event_packet+0x481a/0x86f5 [ 73.626319][ T6987] hci_rx_work+0x22e/0xb10 [ 73.630739][ T6987] process_one_work+0x94c/0x1670 [ 73.635685][ T6987] worker_thread+0x64c/0x1120 [ 73.640365][ T6987] kthread+0x3b5/0x4a0 [ 73.644437][ T6987] ret_from_fork+0x1f/0x30 [ 73.648838][ T6987] [ 73.651156][ T6987] The buggy address belongs to the object at ffff88808fab0000 [ 73.651156][ T6987] which belongs to the cache kmalloc-4k of size 4096 [ 73.665212][ T6987] The buggy address is located 16 bytes inside of [ 73.665212][ T6987] 4096-byte region [ffff88808fab0000, ffff88808fab1000) [ 73.678479][ T6987] The buggy address belongs to the page: [ 73.684127][ T6987] page:ffffea00023eac00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 head:ffffea00023eac00 order:1 compound_mapcount:0 [ 73.697572][ T6987] flags: 0xfffe0000010200(slab|head) [ 73.702868][ T6987] raw: 00fffe0000010200 ffffea0002413e08 ffffea0002986088 ffff8880aa002000 [ 73.711460][ T6987] raw: 0000000000000000 ffff88808fab0000 0000000100000001 0000000000000000 [ 73.720038][ T6987] page dumped because: kasan: bad access detected [ 73.726455][ T6987] [ 73.728775][ T6987] Memory state around the buggy address: [ 73.734400][ T6987] ffff88808faaff00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 73.742472][ T6987] ffff88808faaff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc 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 [ 73.750541][ T6987] >ffff88808fab0000: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.758599][ T6987] ^ [ 73.763326][ T6987] ffff88808fab0080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.771404][ T6987] ffff88808fab0100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 73.779465][ T6987] ================================================================== [ 73.787523][ T6987] Disabling lock debugging due to kernel taint [ 73.884700][ T6987] Kernel panic - not syncing: panic_on_warn set ... [ 73.891317][ T6987] CPU: 0 PID: 6987 Comm: syz-executor963 Tainted: G B 5.8.0-syzkaller #0 [ 73.901012][ T6987] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 73.911062][ T6987] Call Trace: [ 73.914340][ T6987] dump_stack+0x18f/0x20d [ 73.918665][ T6987] ? sco_chan_del+0x40/0x430 [ 73.923240][ T6987] ? __sock_release+0x280/0x280 [ 73.928071][ T6987] panic+0x2e3/0x75c [ 73.931946][ T6987] ? __warn_printk+0xf3/0xf3 [ 73.936566][ T6987] ? preempt_schedule_common+0x59/0xc0 [ 73.942010][ T6987] ? sco_chan_del+0xe6/0x430 [ 73.946582][ T6987] ? preempt_schedule_thunk+0x16/0x18 [ 73.951937][ T6987] ? trace_hardirqs_on+0x55/0x220 [ 73.956938][ T6987] ? sco_chan_del+0xe6/0x430 [ 73.961525][ T6987] ? sco_chan_del+0xe6/0x430 [ 73.966090][ T6987] ? __sock_release+0x280/0x280 [ 73.970922][ T6987] end_report+0x4d/0x53 [ 73.975062][ T6987] kasan_report.cold+0xd/0x37 [ 73.979713][ T6987] ? sco_chan_del+0xe6/0x430 [ 73.984276][ T6987] check_memory_region+0x13d/0x180 [ 73.989362][ T6987] sco_chan_del+0xe6/0x430 [ 73.993754][ T6987] __sco_sock_close+0x16e/0x5b0 [ 73.998587][ T6987] sco_sock_release+0x69/0x290 [ 74.003336][ T6987] __sock_release+0xcd/0x280 [ 74.007902][ T6987] sock_close+0x18/0x20 [ 74.012034][ T6987] __fput+0x33c/0x880 [ 74.015995][ T6987] task_work_run+0xdd/0x190 [ 74.020486][ T6987] do_exit+0xb72/0x2a40 [ 74.024624][ T6987] ? lock_acquire+0x1f1/0xad0 [ 74.029274][ T6987] ? find_held_lock+0x2d/0x110 [ 74.034011][ T6987] ? mm_update_next_owner+0x7a0/0x7a0 [ 74.039356][ T6987] ? get_signal+0x332/0x1ee0 [ 74.043922][ T6987] ? lock_downgrade+0x830/0x830 [ 74.048757][ T6987] ? lock_is_held_type+0xbb/0xf0 [ 74.053669][ T6987] do_group_exit+0x125/0x310 [ 74.058236][ T6987] get_signal+0x40b/0x1ee0 [ 74.062628][ T6987] ? sco_sock_connect+0x4e4/0x980 [ 74.067625][ T6987] ? trace_hardirqs_on+0x5f/0x220 [ 74.072622][ T6987] ? sco_sock_connect+0x4e4/0x980 [ 74.077619][ T6987] ? __local_bh_enable_ip+0xd1/0x190 [ 74.082878][ T6987] do_signal+0x82/0x2520 [ 74.087095][ T6987] ? sco_sock_release+0x290/0x290 [ 74.092099][ T6987] ? __sys_connect_file+0x4e/0x1a0 [ 74.097184][ T6987] ? copy_siginfo_to_user32+0xa0/0xa0 [ 74.102531][ T6987] ? __sys_connect_file+0x1a0/0x1a0 [ 74.107702][ T6987] ? lock_is_held_type+0xbb/0xf0 [ 74.112621][ T6987] ? __prepare_exit_to_usermode+0x9e/0x1c0 [ 74.118401][ T6987] ? lockdep_hardirqs_on_prepare+0x354/0x530 [ 74.124366][ T6987] __prepare_exit_to_usermode+0x128/0x1c0 [ 74.130111][ T6987] do_syscall_64+0x6c/0xe0 [ 74.134505][ T6987] entry_SYSCALL_64_after_hwframe+0x44/0xa9 [ 74.140545][ T6987] RIP: 0033:0x446eb9 [ 74.144412][ T6987] Code: Bad RIP value. [ 74.148454][ T6987] RSP: 002b:00007fff22a9fea8 EFLAGS: 00000246 ORIG_RAX: 000000000000002a [ 74.156853][ T6987] RAX: fffffffffffffffc RBX: 0000000000000000 RCX: 0000000000446eb9 [ 74.164796][ T6987] RDX: 0000000000000008 RSI: 0000000020000080 RDI: 0000000000000004 [ 74.172747][ T6987] RBP: 0000000000000004 R08: 0000000000000002 R09: 00000000000100ff [ 74.180691][ T6987] R10: 0000000000000004 R11: 0000000000000246 R12: 0000000000000000 [ 74.188636][ T6987] R13: 0000000000407b10 R14: 0000000000000000 R15: 0000000000000000 [ 74.197921][ T6987] Kernel Offset: disabled [ 74.202236][ T6987] Rebooting in 86400 seconds..