[ 35.560437] audit: type=1800 audit(1552100153.637:28): pid=7523 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. [ 36.309952] audit: type=1800 audit(1552100154.427:29): pid=7523 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 [ 36.334138] audit: type=1800 audit(1552100154.427:30): pid=7523 uid=0 auid=4294967295 ses=4294967295 subj==unconfined 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 '10.128.0.45' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 43.020461] [drm:drm_calc_timestamping_constants] *ERROR* crtc 31: Can't calculate constants, dotclock = 0! [ 43.031925] WARNING: CPU: 0 PID: 7697 at drivers/gpu/drm/vkms/vkms_crtc.c:40 vkms_vblank_simulate+0x262/0x2c0 [ 43.042040] Kernel panic - not syncing: panic_on_warn set ... [ 43.047913] CPU: 0 PID: 7697 Comm: syz-executor649 Not tainted 5.0.0+ #13 [ 43.054820] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 43.064161] Call Trace: [ 43.066768] [ 43.068952] dump_stack+0x172/0x1f0 [ 43.072573] ? vkms_vblank_simulate+0x1e0/0x2c0 [ 43.077279] panic+0x2cb/0x65c [ 43.080457] ? __warn_printk+0xf3/0xf3 [ 43.084333] ? vkms_vblank_simulate+0x262/0x2c0 [ 43.088987] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.094510] ? __warn.cold+0x5/0x45 [ 43.098204] ? __warn+0xe8/0x1d0 [ 43.101556] ? vkms_vblank_simulate+0x262/0x2c0 [ 43.106208] __warn.cold+0x20/0x45 [ 43.109733] ? vkms_vblank_simulate+0x262/0x2c0 [ 43.114386] report_bug+0x263/0x2b0 [ 43.118005] do_error_trap+0x11b/0x200 [ 43.121901] do_invalid_op+0x37/0x50 [ 43.125625] ? vkms_vblank_simulate+0x262/0x2c0 [ 43.130299] invalid_op+0x14/0x20 [ 43.133737] RIP: 0010:vkms_vblank_simulate+0x262/0x2c0 [ 43.138998] 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 [ 43.157910] RSP: 0018:ffff8880ae807dd8 EFLAGS: 00010006 [ 43.163294] RAX: ffff888090dfa380 RBX: ffff8880ae825d80 RCX: ffffffff83d4f673 [ 43.170575] RDX: 0000000000010000 RSI: ffffffff83d4f782 RDI: 0000000000000007 [ 43.177834] RBP: ffff8880ae807e08 R08: ffff888090dfa380 R09: ffffffff899a4008 [ 43.185093] R10: ffffffff899a4010 R11: 0000000000000001 R12: 0000000000079984 [ 43.192367] R13: ffff8880a4261ac0 R14: 0000000000000000 R15: ffff8880a4260f98 [ 43.199657] ? vkms_vblank_simulate+0x153/0x2c0 [ 43.204309] ? vkms_vblank_simulate+0x262/0x2c0 [ 43.208966] ? vkms_vblank_simulate+0x262/0x2c0 [ 43.213641] __hrtimer_run_queues+0x33e/0xde0 [ 43.218128] ? vkms_disable_vblank+0x20/0x20 [ 43.222522] ? hrtimer_start_range_ns+0xc80/0xc80 [ 43.227351] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 43.232348] ? ktime_get_update_offsets_now+0x2d9/0x440 [ 43.237699] hrtimer_interrupt+0x314/0x770 [ 43.241921] smp_apic_timer_interrupt+0x120/0x570 [ 43.246754] apic_timer_interrupt+0xf/0x20 [ 43.250991] [ 43.253248] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 [ 43.258965] 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 [ 43.277976] RSP: 0018:ffff88809e60fb20 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 43.285674] RAX: 1ffffffff1125286 RBX: 0000000000000282 RCX: 0000000000000000 [ 43.292938] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000282 [ 43.300196] RBP: ffff88809e60fb30 R08: ffff888090dfa380 R09: 0000000000000000 [ 43.307467] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8880a4260530 [ 43.314722] R13: 0000000000000000 R14: ffff8880a4260530 R15: ffff8880a415ddc8 [ 43.322000] drm_vblank_get+0x150/0x1e0 [ 43.325963] drm_wait_vblank_ioctl+0x4f8/0x17a0 [ 43.330621] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 43.335979] ? lock_downgrade+0x880/0x880 [ 43.340115] ? drm_dev_exit+0x60/0x60 [ 43.343902] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 43.349430] drm_ioctl_kernel+0x23e/0x2e0 [ 43.353569] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 43.358952] ? drm_setversion+0x8c0/0x8c0 [ 43.363090] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 43.368616] ? _copy_from_user+0xdd/0x150 [ 43.372750] compat_drm_wait_vblank+0xd6/0x190 [ 43.377334] ? map_one_buf32+0x1e0/0x1e0 [ 43.381387] ? map_one_buf32+0x1e0/0x1e0 [ 43.385467] drm_compat_ioctl+0x1e5/0x310 [ 43.389607] ? security_file_ioctl+0x93/0xc0 [ 43.394010] ? compat_drm_setunique+0x10/0x10 [ 43.398496] __ia32_compat_sys_ioctl+0x197/0x620 [ 43.403254] do_fast_syscall_32+0x281/0xc98 [ 43.407566] entry_SYSENTER_compat+0x70/0x7f [ 43.411958] RIP: 0023:0xf7fcc869 [ 43.415324] Code: 85 d2 74 02 89 0a 5b 5d c3 8b 04 24 c3 8b 14 24 c3 8b 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 [ 43.434246] RSP: 002b:00000000ffc9799c EFLAGS: 00000213 ORIG_RAX: 0000000000000036 [ 43.444128] RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00000000c018643a [ 43.451393] RDX: 0000000020000080 RSI: 00000000080ef078 RDI: 00000000ffc979f0 [ 43.458653] RBP: 0000000000001000 R08: 0000000000000000 R09: 0000000000000000 [ 43.465915] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 43.473181] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 43.481484] Kernel Offset: disabled [ 43.485176] Rebooting in 86400 seconds..