[ 35.451725] audit: type=1800 audit(1552002762.012:27): pid=7488 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 35.482967] audit: type=1800 audit(1552002762.012:28): pid=7488 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. [ 36.252178] audit: type=1800 audit(1552002762.862:29): pid=7488 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 [ 36.271651] audit: type=1800 audit(1552002762.862:30): pid=7488 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="rmnologin" dev="sda1" ino=2423 res=0 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.130' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 47.434332] WARNING: CPU: 1 PID: 7640 at kernel/workqueue.c:3020 __flush_work+0x74c/0x8a0 [ 47.442748] Kernel panic - not syncing: panic_on_warn set ... [ 47.448629] CPU: 1 PID: 7640 Comm: syz-executor009 Not tainted 5.0.0+ #11 [ 47.455536] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 47.464868] Call Trace: [ 47.467437] dump_stack+0x172/0x1f0 [ 47.471046] ? __flush_work+0x6d0/0x8a0 [ 47.475005] panic+0x2cb/0x65c [ 47.478183] ? __warn_printk+0xf3/0xf3 [ 47.482054] ? __flush_work+0x74c/0x8a0 [ 47.486008] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.491529] ? __warn.cold+0x5/0x45 [ 47.495140] ? __warn+0xe8/0x1d0 [ 47.498490] ? __flush_work+0x74c/0x8a0 [ 47.502444] __warn.cold+0x20/0x45 [ 47.505986] ? __flush_work+0x74c/0x8a0 [ 47.509943] report_bug+0x263/0x2b0 [ 47.513555] do_error_trap+0x11b/0x200 [ 47.517448] do_invalid_op+0x37/0x50 [ 47.521157] ? __flush_work+0x74c/0x8a0 [ 47.525125] invalid_op+0x14/0x20 [ 47.528565] RIP: 0010:__flush_work+0x74c/0x8a0 [ 47.533134] Code: 74 58 e8 77 12 26 00 fb 66 0f 1f 44 00 00 45 31 e4 e9 86 fd ff ff e8 63 12 26 00 0f 0b 45 31 e4 e9 77 fd ff ff e8 54 12 26 00 <0f> 0b 45 31 e4 e9 68 fd ff ff e8 45 12 26 00 4c 89 ff 45 31 e4 e8 [ 47.552018] RSP: 0018:ffff888090e6f608 EFLAGS: 00010293 [ 47.557362] RAX: ffff8880949aa700 RBX: ffff888219535000 RCX: ffffffff814a14cb [ 47.564614] RDX: 0000000000000000 RSI: ffffffff814a1b7c RDI: 0000000000000001 [ 47.571861] RBP: ffff888090e6f778 R08: ffff8880949aa700 R09: ffffed10121cdedd [ 47.579110] R10: ffffed10121cdedc R11: 0000000000000003 R12: dffffc0000000000 [ 47.586365] R13: ffff888090e6f750 R14: 0000000000000000 R15: 0000000000000001 [ 47.593626] ? __flush_work+0x9b/0x8a0 [ 47.597497] ? __flush_work+0x74c/0x8a0 [ 47.601451] ? __flush_work+0x74c/0x8a0 [ 47.605410] ? insert_work+0x3a0/0x3a0 [ 47.609278] ? mark_held_locks+0xa4/0xf0 [ 47.613322] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.618883] ? refcount_sub_and_test_checked+0x154/0x200 [ 47.624315] ? refcount_dec_not_one+0x1f0/0x1f0 [ 47.628969] ? __drm_atomic_helper_crtc_destroy_state+0xf3/0x340 [ 47.635123] flush_work+0x18/0x20 [ 47.638565] vkms_atomic_crtc_destroy_state+0x2d/0x40 [ 47.643742] drm_atomic_state_default_clear+0x37c/0xd60 [ 47.649092] drm_atomic_state_clear+0x9d/0xc0 [ 47.653578] __drm_atomic_state_free+0x3c/0xf0 [ 47.658161] drm_atomic_helper_set_config+0xe5/0x160 [ 47.663252] drm_mode_setcrtc+0x613/0x1490 [ 47.667478] ? drm_mode_getcrtc+0x870/0x870 [ 47.671786] ? drm_dev_exit+0x22/0x60 [ 47.675571] ? find_held_lock+0x35/0x130 [ 47.679613] ? drm_dev_exit+0x22/0x60 [ 47.683402] ? drm_lease_owner+0x45/0x60 [ 47.687446] ? drm_is_current_master+0x5c/0x140 [ 47.692101] drm_ioctl_kernel+0x23b/0x2e0 [ 47.696251] ? drm_mode_getcrtc+0x870/0x870 [ 47.700553] ? drm_setversion+0x8c0/0x8c0 [ 47.704686] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 47.710207] ? _copy_from_user+0xdd/0x150 [ 47.714341] drm_ioctl+0x545/0xa50 [ 47.717860] ? drm_mode_getcrtc+0x870/0x870 [ 47.722174] ? drm_version+0x3d0/0x3d0 [ 47.726061] ? debug_check_no_obj_freed+0x200/0x464 [ 47.731067] ? trace_hardirqs_off+0x62/0x220 [ 47.735456] ? drm_version+0x3d0/0x3d0 [ 47.739327] do_vfs_ioctl+0xd6e/0x1390 [ 47.743201] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.748720] ? ioctl_preallocate+0x210/0x210 [ 47.753111] ? putname+0xef/0x130 [ 47.756553] ? putname+0xef/0x130 [ 47.759989] ? rcu_read_lock_sched_held+0x110/0x130 [ 47.764988] ? kmem_cache_free+0x225/0x260 [ 47.769203] ? putname+0xf4/0x130 [ 47.772656] ? do_sys_open+0x31d/0x5d0 [ 47.776544] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 47.782074] ? security_file_ioctl+0x93/0xc0 [ 47.786466] ksys_ioctl+0xab/0xd0 [ 47.789905] __x64_sys_ioctl+0x73/0xb0 [ 47.793776] do_syscall_64+0x103/0x610 [ 47.797654] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 47.802840] RIP: 0033:0x443de9 [ 47.806015] 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 [ 47.824899] RSP: 002b:00007fff597448c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 47.832589] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443de9 [ 47.839853] RDX: 0000000020000180 RSI: 00000000c06864a2 RDI: 0000000000000003 [ 47.847102] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 47.854374] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401af0 [ 47.861623] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 [ 47.869639] Kernel Offset: disabled [ 47.873321] Rebooting in 86400 seconds..