[ 34.837715] audit: type=1800 audit(1552099397.969:28): pid=7444 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. [ 35.375607] audit: type=1800 audit(1552099398.579:29): pid=7444 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 35.394246] audit: type=1800 audit(1552099398.579:30): pid=7444 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 [....] startpar: service(s) returned failure: rsyslog ssh ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.195' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 67.743136] [drm:drm_calc_timestamping_constants] *ERROR* crtc 31: Can't calculate constants, dotclock = 0! [ 67.754801] WARNING: CPU: 1 PID: 7619 at drivers/gpu/drm/vkms/vkms_crtc.c:40 vkms_vblank_simulate+0x262/0x2c0 [ 67.765272] Kernel panic - not syncing: panic_on_warn set ... [ 67.771236] CPU: 1 PID: 7619 Comm: syz-executor149 Not tainted 5.0.0+ #13 [ 67.778665] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 67.788079] Call Trace: [ 67.790661] [ 67.792808] dump_stack+0x172/0x1f0 [ 67.796517] ? vkms_vblank_simulate+0x1e0/0x2c0 [ 67.801336] panic+0x2cb/0x65c [ 67.804663] ? __warn_printk+0xf3/0xf3 [ 67.808542] ? vkms_vblank_simulate+0x262/0x2c0 [ 67.813311] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 67.818846] ? __warn.cold+0x5/0x45 [ 67.822459] ? __warn+0xe8/0x1d0 [ 67.825991] ? vkms_vblank_simulate+0x262/0x2c0 [ 67.830838] __warn.cold+0x20/0x45 [ 67.834375] ? vkms_vblank_simulate+0x262/0x2c0 [ 67.839124] report_bug+0x263/0x2b0 [ 67.842775] do_error_trap+0x11b/0x200 [ 67.846919] do_invalid_op+0x37/0x50 [ 67.850629] ? vkms_vblank_simulate+0x262/0x2c0 [ 67.855286] invalid_op+0x14/0x20 [ 67.858746] RIP: 0010:vkms_vblank_simulate+0x262/0x2c0 [ 67.864032] Code: c7 c7 40 07 bc 87 e8 6d 67 bb ff e9 2c fe ff ff e8 93 5e 9b fd 48 8b 45 d0 49 89 86 40 02 00 00 e9 7a ff ff ff e8 7e 5e 9b fd <0f> 0b e9 f4 fe ff ff e8 b2 57 d3 fd e9 34 fe ff ff e8 08 58 d3 fd [ 67.884009] RSP: 0018:ffff8880ae907dd8 EFLAGS: 00010006 [ 67.889466] RAX: ffff8880a983a440 RBX: ffff8880ae925d80 RCX: ffffffff83d4f673 [ 67.896742] RDX: 0000000000010000 RSI: ffffffff83d4f782 RDI: 0000000000000007 [ 67.904710] RBP: ffff8880ae907e08 R08: ffff8880a983a440 R09: ffffffff899a4048 [ 67.911986] R10: ffffffff899a4050 R11: 0000000000000001 R12: 00000000000620ea [ 67.919438] R13: ffff88821932d9c0 R14: 0000000000000000 R15: ffff88821932ce98 [ 67.926844] ? vkms_vblank_simulate+0x153/0x2c0 [ 67.931654] ? vkms_vblank_simulate+0x262/0x2c0 [ 67.936349] ? vkms_vblank_simulate+0x262/0x2c0 [ 67.941018] __hrtimer_run_queues+0x33e/0xde0 [ 67.945518] ? vkms_disable_vblank+0x20/0x20 [ 67.949954] ? hrtimer_start_range_ns+0xc80/0xc80 [ 67.954916] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 67.960046] ? ktime_get_update_offsets_now+0x2d9/0x440 [ 67.965406] hrtimer_interrupt+0x314/0x770 [ 67.969638] smp_apic_timer_interrupt+0x120/0x570 [ 67.974471] apic_timer_interrupt+0xf/0x20 [ 67.978789] [ 67.981042] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 [ 67.986886] Code: 48 c7 c0 30 94 92 88 48 ba 00 00 00 00 00 fc ff df 48 c1 e8 03 80 3c 10 00 75 39 48 83 3d a2 f0 88 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 9c 0f 44 fa 65 8b 05 e5 49 f8 78 [ 68.006049] RSP: 0018:ffff88808c6c7938 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 68.013860] RAX: 1ffffffff1125286 RBX: 0000000000000282 RCX: 0000000000000000 [ 68.021234] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000282 [ 68.028701] RBP: ffff88808c6c7948 R08: ffff8880a983a440 R09: 0000000000000000 [ 68.036059] R10: 0000000000000000 R11: 0000000000000000 R12: ffff88821932c430 [ 68.043326] R13: 0000000000000000 R14: ffff88821932c430 R15: ffff88821967eb08 [ 68.050729] drm_vblank_get+0x150/0x1e0 [ 68.055023] drm_wait_vblank_ioctl+0x4f8/0x17a0 [ 68.061802] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 68.067927] ? lock_downgrade+0x880/0x880 [ 68.072064] ? drm_dev_exit+0x60/0x60 [ 68.076073] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.081802] drm_ioctl_kernel+0x23e/0x2e0 [ 68.086199] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 68.091914] ? drm_setversion+0x8c0/0x8c0 [ 68.096234] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 68.101777] ? _copy_from_user+0xdd/0x150 [ 68.105921] drm_ioctl+0x545/0xa50 [ 68.109452] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 68.114815] ? drm_version+0x3d0/0x3d0 [ 68.118693] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 68.123778] ? smack_log+0x415/0x540 [ 68.127606] ? debug_check_no_obj_freed+0x200/0x464 [ 68.132645] ? drm_version+0x3d0/0x3d0 [ 68.136526] do_vfs_ioctl+0xd6e/0x1390 [ 68.140409] ? ioctl_preallocate+0x210/0x210 [ 68.144807] ? smack_file_ioctl+0x196/0x310 [ 68.149107] ? smack_inode_link+0x2d0/0x2d0 [ 68.153409] ? rcu_read_lock_sched_held+0x110/0x130 [ 68.158548] ? kmem_cache_free+0x191/0x260 [ 68.162791] ? do_sys_open+0x31d/0x5d0 [ 68.166670] ? tomoyo_file_ioctl+0x23/0x30 [ 68.170895] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 68.176508] ? security_file_ioctl+0x93/0xc0 [ 68.181007] ksys_ioctl+0xab/0xd0 [ 68.184572] __x64_sys_ioctl+0x73/0xb0 [ 68.188479] do_syscall_64+0x103/0x610 [ 68.192364] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 68.197752] RIP: 0033:0x443ca9 [ 68.200944] Code: 18 89 d0 c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 7b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 68.220057] RSP: 002b:00007ffdd375c918 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 68.227759] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443ca9 [ 68.235146] RDX: 0000000020000080 RSI: 00000000c018643a RDI: 0000000000000003 [ 68.243138] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 68.250682] R10: 000000000000000f R11: 0000000000000246 R12: 00000000004019b0 [ 68.258863] R13: 0000000000401a40 R14: 0000000000000000 R15: 0000000000000000 [ 68.268743] Kernel Offset: disabled [ 68.273123] Rebooting in 86400 seconds..