[ 36.579579][ T26] audit: type=1800 audit(1552097961.519:26): pid=7566 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 36.604224][ T26] audit: type=1800 audit(1552097961.519:27): pid=7566 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 36.640727][ T26] audit: type=1800 audit(1552097961.609:28): pid=7566 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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. [ 37.413204][ T26] audit: type=1800 audit(1552097962.379:29): pid=7566 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.29' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 44.761966][ T7717] [drm:drm_calc_timestamping_constants] *ERROR* crtc 31: Can't calculate constants, dotclock = 0! [ 44.773615][ C1] WARNING: CPU: 1 PID: 7717 at drivers/gpu/drm/vkms/vkms_crtc.c:40 vkms_vblank_simulate+0x262/0x2c0 [ 44.784436][ C1] Kernel panic - not syncing: panic_on_warn set ... [ 44.791002][ C1] CPU: 1 PID: 7717 Comm: syz-executor097 Not tainted 5.0.0-next-20190306 #4 [ 44.799684][ C1] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 44.809720][ C1] Call Trace: [ 44.812976][ C1] [ 44.815822][ C1] dump_stack+0x172/0x1f0 [ 44.820143][ C1] ? vkms_vblank_simulate+0x1a0/0x2c0 [ 44.825529][ C1] panic+0x2cb/0x65c [ 44.829413][ C1] ? __warn_printk+0xf3/0xf3 [ 44.833984][ C1] ? vkms_vblank_simulate+0x262/0x2c0 [ 44.839335][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 44.845554][ C1] ? __warn.cold+0x5/0x45 [ 44.849869][ C1] ? __warn+0xe8/0x1d0 [ 44.853949][ C1] ? vkms_vblank_simulate+0x262/0x2c0 [ 44.859331][ C1] __warn.cold+0x20/0x45 [ 44.863566][ C1] ? vkms_vblank_simulate+0x262/0x2c0 [ 44.868916][ C1] report_bug+0x263/0x2b0 [ 44.873260][ C1] do_error_trap+0x11b/0x200 [ 44.877834][ C1] do_invalid_op+0x37/0x50 [ 44.882224][ C1] ? vkms_vblank_simulate+0x262/0x2c0 [ 44.887570][ C1] invalid_op+0x14/0x20 [ 44.891702][ C1] RIP: 0010:vkms_vblank_simulate+0x262/0x2c0 [ 44.897661][ C1] Code: c7 c7 80 7b bc 87 e8 3d 66 bb ff e9 2c fe ff ff e8 83 dc 97 fd 48 8b 45 d0 49 89 86 40 02 00 00 e9 7a ff ff ff e8 6e dc 97 fd <0f> 0b e9 f4 fe ff ff e8 52 de cf fd e9 34 fe ff ff e8 a8 de cf fd [ 44.917255][ C1] RSP: 0018:ffff8880ae907dd8 EFLAGS: 00010006 [ 44.923296][ C1] RAX: ffff8880a81cc300 RBX: ffff8880ae925d80 RCX: ffffffff83d8b6b3 [ 44.931251][ C1] RDX: 0000000000010000 RSI: ffffffff83d8b7c2 RDI: 0000000000000007 [ 44.939201][ C1] RBP: ffff8880ae907e08 R08: ffff8880a81cc300 R09: 0000000000000002 [ 44.947149][ C1] R10: fffffbfff14b06f0 R11: ffff8880a81cc300 R12: 000000000006e0f5 [ 44.955099][ C1] R13: ffff888219121a40 R14: 0000000000000000 R15: ffff888219120f18 [ 44.963062][ C1] ? vkms_vblank_simulate+0x153/0x2c0 [ 44.968414][ C1] ? vkms_vblank_simulate+0x262/0x2c0 [ 44.973790][ C1] ? vkms_vblank_simulate+0x262/0x2c0 [ 44.979159][ C1] __hrtimer_run_queues+0x33e/0xde0 [ 44.984342][ C1] ? vkms_disable_vblank+0x20/0x20 [ 44.989451][ C1] ? hrtimer_start_range_ns+0xc80/0xc80 [ 44.994991][ C1] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 45.000703][ C1] ? ktime_get_update_offsets_now+0x2d9/0x440 [ 45.006752][ C1] hrtimer_interrupt+0x314/0x770 [ 45.011682][ C1] smp_apic_timer_interrupt+0x120/0x570 [ 45.017221][ C1] apic_timer_interrupt+0xf/0x20 [ 45.022130][ C1] [ 45.025051][ C1] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 [ 45.031449][ C1] Code: 48 c7 c0 b0 95 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 02 18 83 01 00 74 24 48 89 df 57 9d <0f> 1f 44 00 00 bf 01 00 00 00 e8 cc 42 3e fa 65 8b 05 c5 6f f2 78 [ 45.051032][ C1] RSP: 0018:ffff88809fdff938 EFLAGS: 00000286 ORIG_RAX: ffffffffffffff13 [ 45.059426][ C1] RAX: 1ffffffff11252b6 RBX: 0000000000000286 RCX: 0000000000000000 [ 45.067377][ C1] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000286 [ 45.075325][ C1] RBP: ffff88809fdff948 R08: ffff8880a81cc300 R09: 0000000000000000 [ 45.083279][ C1] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882191204b0 [ 45.091230][ C1] R13: 0000000000000000 R14: ffff8882191204b0 R15: ffff8880a40db648 [ 45.099242][ C1] drm_vblank_get+0x150/0x1e0 [ 45.103908][ C1] drm_wait_vblank_ioctl+0x4f8/0x17a0 [ 45.109267][ C1] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 45.115313][ C1] ? lock_downgrade+0x880/0x880 [ 45.120140][ C1] ? drm_dev_exit+0x60/0x60 [ 45.124641][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.130865][ C1] drm_ioctl_kernel+0x23e/0x2e0 [ 45.135718][ C1] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 45.141764][ C1] ? drm_setversion+0x8c0/0x8c0 [ 45.146615][ C1] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 45.152836][ C1] ? _copy_from_user+0xdd/0x150 [ 45.157686][ C1] drm_ioctl+0x545/0xa50 [ 45.161907][ C1] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 45.167954][ C1] ? drm_version+0x3d0/0x3d0 [ 45.172521][ C1] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 45.178311][ C1] ? debug_check_no_obj_freed+0x211/0x444 [ 45.184016][ C1] ? drm_version+0x3d0/0x3d0 [ 45.188588][ C1] do_vfs_ioctl+0xd6e/0x1390 [ 45.193178][ C1] ? ioctl_preallocate+0x210/0x210 [ 45.198269][ C1] ? putname+0xef/0x130 [ 45.202399][ C1] ? putname+0xef/0x130 [ 45.206884][ C1] ? rcu_read_lock_sched_held+0x110/0x130 [ 45.212582][ C1] ? kmem_cache_free+0x225/0x260 [ 45.217507][ C1] ? putname+0xf4/0x130 [ 45.221648][ C1] ? do_sys_open+0x31d/0x5d0 [ 45.226220][ C1] ? tomoyo_file_ioctl+0x23/0x30 [ 45.231155][ C1] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 45.237374][ C1] ? security_file_ioctl+0x93/0xc0 [ 45.242462][ C1] ksys_ioctl+0xab/0xd0 [ 45.246596][ C1] __x64_sys_ioctl+0x73/0xb0 [ 45.251165][ C1] do_syscall_64+0x103/0x610 [ 45.255745][ C1] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 45.261618][ C1] RIP: 0033:0x443ca9 [ 45.265491][ C1] 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 [ 45.285070][ C1] RSP: 002b:00007ffdb2ea33b8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 45.293472][ C1] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443ca9 [ 45.301420][ C1] RDX: 0000000020000080 RSI: 00000000c018643a RDI: 0000000000000003 [ 45.309369][ C1] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 45.317316][ C1] R10: 000000000000000f R11: 0000000000000246 R12: 00000000004019b0 [ 45.325267][ C1] R13: 0000000000401a40 R14: 0000000000000000 R15: 0000000000000000 [ 45.334047][ C1] Kernel Offset: disabled [ 45.338422][ C1] Rebooting in 86400 seconds..