[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 42.533633][ T26] audit: type=1800 audit(1553176526.412:25): pid=7928 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 42.568436][ T26] audit: type=1800 audit(1553176526.412:26): pid=7928 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 42.607323][ T26] audit: type=1800 audit(1553176526.422:27): pid=7928 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 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. Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.162' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 57.446794][ T1174] BUG: unable to handle kernel NULL pointer dereference at 0000000000000000 [ 57.455503][ T1174] #PF error: [INSTR] [ 57.459377][ T1174] PGD a4ca2067 P4D a4ca2067 PUD a4ec1067 PMD 0 [ 57.465595][ T1174] Oops: 0010 [#1] PREEMPT SMP KASAN [ 57.470769][ T1174] CPU: 1 PID: 1174 Comm: kworker/u5:0 Not tainted 5.1.0-rc1+ #31 [ 57.478458][ T1174] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 57.488504][ T1174] Workqueue: hci0 hci_power_on [ 57.493252][ T1174] RIP: 0010: (null) [ 57.497828][ T1174] Code: Bad RIP value. [ 57.501870][ T1174] RSP: 0018:ffff8880a7897a28 EFLAGS: 00010246 [ 57.507914][ T1174] RAX: 0000000000000000 RBX: ffffffff87ac4d20 RCX: 0000000000000000 [ 57.516124][ T1174] RDX: 1ffffffff0f589bd RSI: 1ffff11014f0c997 RDI: ffff888091602d00 [ 57.524104][ T1174] RBP: ffff8880a7897b00 R08: ffff8880a78643c0 R09: 0000000000000004 [ 57.532053][ T1174] R10: ffffed10122c05a5 R11: ffff888091602d2f R12: ffff888091602d00 [ 57.540008][ T1174] R13: 1ffff11014f12f47 R14: ffff888091602d10 R15: 0000000000000000 [ 57.547961][ T1174] FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 57.556865][ T1174] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.563427][ T1174] CR2: ffffffffffffffd6 CR3: 00000000a40bb000 CR4: 00000000001406e0 [ 57.571394][ T1174] Call Trace: [ 57.574928][ T1174] hci_uart_set_flow_control+0x41e/0x600 [ 57.580544][ T1174] ? hci_uart_init_ready+0xc0/0xc0 [ 57.585639][ T1174] ? hci_uart_set_baudrate+0x157/0x1c0 [ 57.591083][ T1174] mrvl_setup+0x22/0x110 [ 57.595323][ T1174] ? mrvl_load_firmware+0x5b0/0x5b0 [ 57.600504][ T1174] hci_uart_setup+0x1c4/0x490 [ 57.605159][ T1174] ? hci_uart_set_baudrate+0x1c0/0x1c0 [ 57.610599][ T1174] hci_dev_do_open+0x78c/0x1780 [ 57.615429][ T1174] ? hci_rx_work+0xaa0/0xaa0 [ 57.620005][ T1174] ? mark_held_locks+0xf0/0xf0 [ 57.624770][ T1174] hci_power_on+0x10d/0x580 [ 57.629270][ T1174] ? hci_error_reset+0xf0/0xf0 [ 57.634035][ T1174] process_one_work+0x98e/0x1790 [ 57.639044][ T1174] ? pwq_dec_nr_in_flight+0x320/0x320 [ 57.644413][ T1174] worker_thread+0x98/0xe40 [ 57.648901][ T1174] kthread+0x357/0x430 [ 57.652951][ T1174] ? process_one_work+0x1790/0x1790 [ 57.658160][ T1174] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 57.664380][ T1174] ret_from_fork+0x3a/0x50 [ 57.668812][ T1174] Modules linked in: [ 57.672686][ T1174] CR2: 0000000000000000 [ 57.676821][ T1174] ---[ end trace ce6523259bd209f3 ]--- [ 57.682252][ T1174] RIP: 0010: (null) [ 57.686847][ T1174] Code: Bad RIP value. [ 57.690893][ T1174] RSP: 0018:ffff8880a7897a28 EFLAGS: 00010246 [ 57.696949][ T1174] RAX: 0000000000000000 RBX: ffffffff87ac4d20 RCX: 0000000000000000 [ 57.704898][ T1174] RDX: 1ffffffff0f589bd RSI: 1ffff11014f0c997 RDI: ffff888091602d00 [ 57.712850][ T1174] RBP: ffff8880a7897b00 R08: ffff8880a78643c0 R09: 0000000000000004 [ 57.720800][ T1174] R10: ffffed10122c05a5 R11: ffff888091602d2f R12: ffff888091602d00 [ 57.728751][ T1174] R13: 1ffff11014f12f47 R14: ffff888091602d10 R15: 0000000000000000 [ 57.736700][ T1174] FS: 0000000000000000(0000) GS:ffff8880ae900000(0000) knlGS:0000000000000000 [ 57.745603][ T1174] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 57.752184][ T1174] CR2: ffffffffffffffd6 CR3: 00000000a40bb000 CR4: 00000000001406e0 [ 57.760139][ T1174] Kernel panic - not syncing: Fatal exception [ 57.766948][ T1174] Kernel Offset: disabled [ 57.771284][ T1174] Rebooting in 86400 seconds..