[   37.144699] audit: type=1800 audit(1552002481.944:27): pid=7576 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0
[   37.168139] audit: type=1800 audit(1552002481.944:28): pid=7576 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.
[   37.991354] audit: type=1800 audit(1552002482.864:29): pid=7576 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0
[   38.009934] audit: type=1800 audit(1552002482.864:30): pid=7576 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.0.45' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [   45.049677] WARNING: CPU: 1 PID: 7727 at kernel/workqueue.c:3020 __flush_work+0x74c/0x8a0
[   45.058114] Kernel panic - not syncing: panic_on_warn set ...
[   45.063991] CPU: 1 PID: 7727 Comm: syz-executor728 Not tainted 5.0.0+ #11
[   45.070899] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
[   45.080237] Call Trace:
[   45.082816]  dump_stack+0x172/0x1f0
[   45.086429]  ? __flush_work+0x6d0/0x8a0
[   45.090395]  panic+0x2cb/0x65c
[   45.093574]  ? __warn_printk+0xf3/0xf3
[   45.097448]  ? __flush_work+0x74c/0x8a0
[   45.101404]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   45.106946]  ? __warn.cold+0x5/0x45
[   45.110558]  ? __warn+0xe8/0x1d0
[   45.113909]  ? __flush_work+0x74c/0x8a0
[   45.117899]  __warn.cold+0x20/0x45
[   45.121421]  ? __flush_work+0x74c/0x8a0
[   45.125375]  report_bug+0x263/0x2b0
[   45.128987]  do_error_trap+0x11b/0x200
[   45.132857]  do_invalid_op+0x37/0x50
[   45.136567]  ? __flush_work+0x74c/0x8a0
[   45.140544]  invalid_op+0x14/0x20
[   45.143978] RIP: 0010:__flush_work+0x74c/0x8a0
[   45.148579] 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
[   45.167483] RSP: 0018:ffff888093a77608 EFLAGS: 00010293
[   45.172843] RAX: ffff88808f10a340 RBX: ffff8880a56d0fc0 RCX: ffffffff814a14cb
[   45.180096] RDX: 0000000000000000 RSI: ffffffff814a1b7c RDI: 0000000000000001
[   45.187362] RBP: ffff888093a77778 R08: ffff88808f10a340 R09: ffffed101274eedd
[   45.194624] R10: ffffed101274eedc R11: 0000000000000003 R12: dffffc0000000000
[   45.201872] R13: ffff888093a77750 R14: 0000000000000000 R15: 0000000000000001
[   45.209141]  ? __flush_work+0x9b/0x8a0
[   45.213006]  ? __flush_work+0x74c/0x8a0
[   45.216965]  ? __flush_work+0x74c/0x8a0
[   45.220923]  ? insert_work+0x3a0/0x3a0
[   45.224794]  ? mark_held_locks+0xa4/0xf0
[   45.228838]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   45.234372]  ? refcount_sub_and_test_checked+0x154/0x200
[   45.239806]  ? refcount_dec_not_one+0x1f0/0x1f0
[   45.244461]  ? __drm_atomic_helper_crtc_destroy_state+0xf3/0x340
[   45.250593]  flush_work+0x18/0x20
[   45.254027]  vkms_atomic_crtc_destroy_state+0x2d/0x40
[   45.259206]  drm_atomic_state_default_clear+0x37c/0xd60
[   45.264555]  drm_atomic_state_clear+0x9d/0xc0
[   45.269031]  __drm_atomic_state_free+0x3c/0xf0
[   45.273603]  drm_atomic_helper_set_config+0xe5/0x160
[   45.278692]  drm_mode_setcrtc+0x613/0x1490
[   45.282918]  ? drm_mode_getcrtc+0x870/0x870
[   45.287227]  ? drm_dev_exit+0x22/0x60
[   45.291012]  ? find_held_lock+0x35/0x130
[   45.295057]  ? drm_dev_exit+0x22/0x60
[   45.298850]  ? drm_lease_owner+0x45/0x60
[   45.302892]  ? drm_is_current_master+0x5c/0x140
[   45.307554]  drm_ioctl_kernel+0x23b/0x2e0
[   45.311686]  ? drm_mode_getcrtc+0x870/0x870
[   45.315990]  ? drm_setversion+0x8c0/0x8c0
[   45.320126]  ? __sanitizer_cov_trace_const_cmp8+0x18/0x20
[   45.325646]  ? _copy_from_user+0xdd/0x150
[   45.329781]  drm_ioctl+0x545/0xa50
[   45.333304]  ? drm_mode_getcrtc+0x870/0x870
[   45.337614]  ? drm_version+0x3d0/0x3d0
[   45.341482]  ? smack_log+0x415/0x540
[   45.345191]  ? debug_check_no_obj_freed+0x200/0x464
[   45.350198]  ? smk_tskacc+0x2ba/0x390
[   45.353978]  ? drm_version+0x3d0/0x3d0
[   45.357850]  do_vfs_ioctl+0xd6e/0x1390
[   45.361719]  ? smk_curacc+0x7f/0xa0
[   45.365325]  ? ioctl_preallocate+0x210/0x210
[   45.369714]  ? smack_file_ioctl+0x196/0x300
[   45.374022]  ? smack_file_lock+0x240/0x240
[   45.378259]  ? rcu_read_lock_sched_held+0x110/0x130
[   45.383254]  ? kmem_cache_free+0x1d1/0x260
[   45.387471]  ? do_sys_open+0x31d/0x5d0
[   45.391340]  ? __sanitizer_cov_trace_const_cmp4+0x16/0x20
[   45.396858]  ? security_file_ioctl+0x93/0xc0
[   45.401249]  ksys_ioctl+0xab/0xd0
[   45.404682]  __x64_sys_ioctl+0x73/0xb0
[   45.408557]  do_syscall_64+0x103/0x610
[   45.412428]  entry_SYSCALL_64_after_hwframe+0x49/0xbe
[   45.417613] RIP: 0033:0x443de9
[   45.420785] 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
[   45.439666] RSP: 002b:00007ffeef28aff8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
[   45.447353] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443de9
[   45.454617] RDX: 0000000020000180 RSI: 00000000c06864a2 RDI: 0000000000000003
[   45.461869] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0
[   45.469116] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401af0
[   45.476363] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000
[   45.484470] Kernel Offset: disabled
[   45.488175] Rebooting in 86400 seconds..