[ 34.980865] audit: type=1800 audit(1552097620.644:28): pid=7452 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. [ 35.726201] audit: type=1800 audit(1552097621.454:29): pid=7452 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 [ 35.746398] audit: type=1800 audit(1552097621.454:30): pid=7452 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 ...[?25l[?1c7[FAIL8[?25h[?0c failed! Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.10.2' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 46.243849] [drm:drm_calc_timestamping_constants] *ERROR* crtc 31: Can't calculate constants, dotclock = 0! [ 46.255237] WARNING: CPU: 0 PID: 7629 at drivers/gpu/drm/vkms/vkms_crtc.c:40 vkms_vblank_simulate+0x262/0x2c0 [ 46.265951] Kernel panic - not syncing: panic_on_warn set ... [ 46.271866] CPU: 0 PID: 7629 Comm: syz-executor239 Not tainted 5.0.0+ #13 [ 46.278916] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 46.288409] Call Trace: [ 46.290992] [ 46.293146] dump_stack+0x172/0x1f0 [ 46.296781] ? vkms_vblank_simulate+0x1e0/0x2c0 [ 46.301545] panic+0x2cb/0x65c [ 46.304815] ? __warn_printk+0xf3/0xf3 [ 46.308745] ? vkms_vblank_simulate+0x262/0x2c0 [ 46.313421] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.319328] ? __warn.cold+0x5/0x45 [ 46.322976] ? __warn+0xe8/0x1d0 [ 46.326352] ? vkms_vblank_simulate+0x262/0x2c0 [ 46.331087] __warn.cold+0x20/0x45 [ 46.334627] ? vkms_vblank_simulate+0x262/0x2c0 [ 46.339305] report_bug+0x263/0x2b0 [ 46.342949] do_error_trap+0x11b/0x200 [ 46.346858] do_invalid_op+0x37/0x50 [ 46.350573] ? vkms_vblank_simulate+0x262/0x2c0 [ 46.355375] invalid_op+0x14/0x20 [ 46.358941] RIP: 0010:vkms_vblank_simulate+0x262/0x2c0 [ 46.364317] 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 [ 46.383602] RSP: 0018:ffff8880ae807dd8 EFLAGS: 00010006 [ 46.389079] RAX: ffff88809896c480 RBX: ffff8880ae825d80 RCX: ffffffff83d4f673 [ 46.396671] RDX: 0000000000010000 RSI: ffffffff83d4f782 RDI: 0000000000000007 [ 46.404011] RBP: ffff8880ae807e08 R08: ffff88809896c480 R09: ffffffff899a4008 [ 46.411285] R10: ffffffff899a4010 R11: 0000000000000001 R12: 000000000006cf2a [ 46.418669] R13: ffff888219159940 R14: 0000000000000000 R15: ffff888219158e18 [ 46.426174] ? vkms_vblank_simulate+0x153/0x2c0 [ 46.430904] ? vkms_vblank_simulate+0x262/0x2c0 [ 46.435591] ? vkms_vblank_simulate+0x262/0x2c0 [ 46.440268] __hrtimer_run_queues+0x33e/0xde0 [ 46.444768] ? vkms_disable_vblank+0x20/0x20 [ 46.449191] ? hrtimer_start_range_ns+0xc80/0xc80 [ 46.454036] ? __sanitizer_cov_trace_cmp4+0x16/0x20 [ 46.459050] ? ktime_get_update_offsets_now+0x2d9/0x440 [ 46.464511] hrtimer_interrupt+0x314/0x770 [ 46.468763] smp_apic_timer_interrupt+0x120/0x570 [ 46.473655] apic_timer_interrupt+0xf/0x20 [ 46.477880] [ 46.480113] RIP: 0010:_raw_spin_unlock_irqrestore+0x95/0xe0 [ 46.485821] 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 [ 46.504844] RSP: 0018:ffff8880902ff938 EFLAGS: 00000282 ORIG_RAX: ffffffffffffff13 [ 46.512861] RAX: 1ffffffff1125286 RBX: 0000000000000282 RCX: 0000000000000000 [ 46.520630] RDX: dffffc0000000000 RSI: 0000000000000006 RDI: 0000000000000282 [ 46.528037] RBP: ffff8880902ff948 R08: ffff88809896c480 R09: 0000000000000000 [ 46.535462] R10: 0000000000000000 R11: 0000000000000000 R12: ffff8882191583b0 [ 46.542740] R13: 0000000000000000 R14: ffff8882191583b0 R15: ffff8882194c5bc8 [ 46.550187] drm_vblank_get+0x150/0x1e0 [ 46.554262] drm_wait_vblank_ioctl+0x4f8/0x17a0 [ 46.559214] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 46.564862] ? lock_downgrade+0x880/0x880 [ 46.569060] ? drm_dev_exit+0x60/0x60 [ 46.573062] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.578718] drm_ioctl_kernel+0x23e/0x2e0 [ 46.582872] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 46.588502] ? drm_setversion+0x8c0/0x8c0 [ 46.592801] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 46.598556] ? _copy_from_user+0xdd/0x150 [ 46.602760] drm_ioctl+0x545/0xa50 [ 46.606385] ? drm_legacy_modeset_ctl_ioctl+0x490/0x490 [ 46.611924] ? drm_version+0x3d0/0x3d0 [ 46.615871] ? tomoyo_execute_permission+0x4a0/0x4a0 [ 46.621064] ? debug_check_no_obj_freed+0x200/0x464 [ 46.626291] ? drm_version+0x3d0/0x3d0 [ 46.630179] do_vfs_ioctl+0xd6e/0x1390 [ 46.634256] ? ioctl_preallocate+0x210/0x210 [ 46.638750] ? putname+0xef/0x130 [ 46.642364] ? putname+0xef/0x130 [ 46.645888] ? rcu_read_lock_sched_held+0x110/0x130 [ 46.651047] ? kmem_cache_free+0x225/0x260 [ 46.655587] ? putname+0xf4/0x130 [ 46.659039] ? do_sys_open+0x31d/0x5d0 [ 46.662923] ? tomoyo_file_ioctl+0x23/0x30 [ 46.667367] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 46.673005] ? security_file_ioctl+0x93/0xc0 [ 46.677413] ksys_ioctl+0xab/0xd0 [ 46.681110] __x64_sys_ioctl+0x73/0xb0 [ 46.685009] do_syscall_64+0x103/0x610 [ 46.689009] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 46.694369] RIP: 0033:0x443ca9 [ 46.697626] 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 [ 46.717094] RSP: 002b:00007ffe17d8f728 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 46.725058] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443ca9 [ 46.732437] RDX: 0000000020000080 RSI: 00000000c018643a RDI: 0000000000000003 [ 46.740011] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 46.747342] R10: 000000000000000f R11: 0000000000000246 R12: 00000000004019b0 [ 46.754624] R13: 0000000000401a40 R14: 0000000000000000 R15: 0000000000000000 [ 46.763264] Kernel Offset: disabled [ 46.767102] Rebooting in 86400 seconds..