[....] Starting enhanced syslogd: rsyslogd[?25l[?1c7[ ok 8[?25h[?0c. [ 62.222825][ T25] audit: type=1800 audit(1575405202.983:25): pid=8816 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="cron" dev="sda1" ino=2414 res=0 [ 62.243551][ T25] audit: type=1800 audit(1575405202.983:26): pid=8816 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 62.291991][ T25] audit: type=1800 audit(1575405202.993:27): pid=8816 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.10.15' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 70.053404][ T3008] divide error: 0000 [#1] PREEMPT SMP KASAN [ 70.053416][ T3008] CPU: 0 PID: 3008 Comm: kworker/0:2 Not tainted 5.4.0-syzkaller #0 [ 70.053422][ T3008] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 70.053437][ T3008] Workqueue: events console_callback [ 70.053454][ T3008] RIP: 0010:fbcon_switch+0x20d/0x17f0 [ 70.053466][ T3008] Code: a4 3b 08 4c 89 3d 33 a4 3b 08 38 d0 7c 08 84 d2 0f 85 48 13 00 00 41 8b 9d 3c 03 00 00 31 d2 bf 05 00 00 00 8b 05 f3 07 13 06 f3 41 89 c4 89 c6 e8 67 48 c3 fd 41 83 fc 05 0f 8e d7 0b 00 00 [ 70.053472][ T3008] RSP: 0018:ffffc900083f79d8 EFLAGS: 00010246 [ 70.053482][ T3008] RAX: 0000000000008000 RBX: 0000000000000000 RCX: ffffffff83b1b314 [ 70.053489][ T3008] RDX: 0000000000000000 RSI: ffffffff83b1b322 RDI: 0000000000000005 [ 70.053496][ T3008] RBP: ffffc900083f7b68 R08: ffff88809f2c02c0 R09: fffffbfff14b0ac8 [ 70.053503][ T3008] R10: fffffbfff14b0ac7 R11: ffffffff8a58563b R12: 0000000000000000 [ 70.053512][ T3008] R13: ffff888097ba8000 R14: ffff88821910f000 R15: ffff8880a3e90000 [ 70.053522][ T3008] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 70.053529][ T3008] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.053536][ T3008] CR2: 00007ffb67643000 CR3: 000000009fe78000 CR4: 00000000001406f0 [ 70.053548][ T3008] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.053555][ T3008] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.053558][ T3008] Call Trace: [ 70.053576][ T3008] ? fbcon_set_def_font+0x360/0x360 [ 70.053588][ T3008] ? mark_held_locks+0xa4/0xf0 [ 70.053599][ T3008] ? __queue_work+0x5c0/0x1280 [ 70.053613][ T3008] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 70.053625][ T3008] ? kernfs_notify+0x131/0x210 [ 70.053637][ T3008] ? _raw_spin_unlock_irqrestore+0x66/0xe0 [ 70.053649][ T3008] ? lockdep_hardirqs_on+0x421/0x5e0 [ 70.053666][ T3008] ? __sanitizer_cov_trace_const_cmp1+0x1a/0x20 [ 70.053678][ T3008] ? kernfs_put+0x37a/0x590 [ 70.053693][ T3008] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.053705][ T3008] ? fbcon_set_origin+0x2b/0x50 [ 70.053717][ T3008] ? fbcon_scrolldelta+0x1220/0x1220 [ 70.053730][ T3008] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.053744][ T3008] redraw_screen+0x2b6/0x7d0 [ 70.053756][ T3008] ? respond_string+0x2c0/0x2c0 [ 70.053769][ T3008] ? __sanitizer_cov_trace_switch+0x49/0x80 [ 70.053781][ T3008] ? get_color+0x225/0x430 [ 70.053798][ T3008] complete_change_console+0x105/0x3a0 [ 70.053811][ T3008] change_console+0x19b/0x2c0 [ 70.053824][ T3008] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 70.053837][ T3008] console_callback+0x3a1/0x400 [ 70.053848][ T3008] ? poke_blanked_console+0x270/0x270 [ 70.053860][ T3008] ? rcu_read_lock_sched_held+0x9c/0xd0 [ 70.053873][ T3008] ? rcu_read_lock_any_held.part.0+0x50/0x50 [ 70.053885][ T3008] ? trace_hardirqs_on+0x67/0x240 [ 70.053900][ T3008] process_one_work+0x9af/0x1740 [ 70.053915][ T3008] ? pwq_dec_nr_in_flight+0x320/0x320 [ 70.053925][ T3008] ? lock_acquire+0x190/0x410 [ 70.053943][ T3008] worker_thread+0x98/0xe40 [ 70.053954][ T3008] ? trace_hardirqs_on+0x67/0x240 [ 70.053970][ T3008] kthread+0x361/0x430 [ 70.053980][ T3008] ? process_one_work+0x1740/0x1740 [ 70.053990][ T3008] ? kthread_mod_delayed_work+0x1f0/0x1f0 [ 70.054001][ T3008] ret_from_fork+0x24/0x30 [ 70.054011][ T3008] Modules linked in: [ 70.054025][ T3008] ---[ end trace 1b376dfbbd93035d ]--- [ 70.054037][ T3008] RIP: 0010:fbcon_switch+0x20d/0x17f0 [ 70.054047][ T3008] Code: a4 3b 08 4c 89 3d 33 a4 3b 08 38 d0 7c 08 84 d2 0f 85 48 13 00 00 41 8b 9d 3c 03 00 00 31 d2 bf 05 00 00 00 8b 05 f3 07 13 06 f3 41 89 c4 89 c6 e8 67 48 c3 fd 41 83 fc 05 0f 8e d7 0b 00 00 [ 70.054053][ T3008] RSP: 0018:ffffc900083f79d8 EFLAGS: 00010246 [ 70.054061][ T3008] RAX: 0000000000008000 RBX: 0000000000000000 RCX: ffffffff83b1b314 [ 70.054067][ T3008] RDX: 0000000000000000 RSI: ffffffff83b1b322 RDI: 0000000000000005 [ 70.054074][ T3008] RBP: ffffc900083f7b68 R08: ffff88809f2c02c0 R09: fffffbfff14b0ac8 [ 70.054081][ T3008] R10: fffffbfff14b0ac7 R11: ffffffff8a58563b R12: 0000000000000000 [ 70.054088][ T3008] R13: ffff888097ba8000 R14: ffff88821910f000 R15: ffff8880a3e90000 [ 70.054096][ T3008] FS: 0000000000000000(0000) GS:ffff8880ae800000(0000) knlGS:0000000000000000 [ 70.054103][ T3008] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 70.054110][ T3008] CR2: 00007ffb67643000 CR3: 000000009fe78000 CR4: 00000000001406f0 [ 70.054117][ T3008] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 70.054123][ T3008] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 70.054129][ T3008] Kernel panic - not syncing: Fatal exception [ 70.055567][ T3008] Kernel Offset: disabled [ 70.507037][ T3008] Rebooting in 86400 seconds..