[ 32.467777] audit: type=1800 audit(1552011035.339:27): pid=7281 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 32.487838] audit: type=1800 audit(1552011035.349:28): pid=7281 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. [ 33.197226] audit: type=1800 audit(1552011036.129:29): pid=7281 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 [ 33.217385] audit: type=1800 audit(1552011036.129:30): pid=7281 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 '10.128.0.22' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 76.522093] WARNING: CPU: 1 PID: 7435 at kernel/workqueue.c:3020 __flush_work+0x74c/0x8a0 [ 76.531001] Kernel panic - not syncing: panic_on_warn set ... [ 76.536902] CPU: 1 PID: 7435 Comm: syz-executor488 Not tainted 5.0.0+ #11 [ 76.544381] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 76.555003] Call Trace: [ 76.557616] dump_stack+0x172/0x1f0 [ 76.561257] ? __flush_work+0x6d0/0x8a0 [ 76.566171] panic+0x2cb/0x65c [ 76.569358] ? __warn_printk+0xf3/0xf3 [ 76.573259] ? __flush_work+0x74c/0x8a0 [ 76.577427] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.583132] ? __warn.cold+0x5/0x45 [ 76.586808] ? __warn+0xe8/0x1d0 [ 76.590172] ? __flush_work+0x74c/0x8a0 [ 76.594156] __warn.cold+0x20/0x45 [ 76.597695] ? __flush_work+0x74c/0x8a0 [ 76.602504] report_bug+0x263/0x2b0 [ 76.606161] do_error_trap+0x11b/0x200 [ 76.611054] do_invalid_op+0x37/0x50 [ 76.614876] ? __flush_work+0x74c/0x8a0 [ 76.619404] invalid_op+0x14/0x20 [ 76.623154] RIP: 0010:__flush_work+0x74c/0x8a0 [ 76.627788] 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 [ 76.647744] RSP: 0018:ffff88808caf7608 EFLAGS: 00010293 [ 76.653222] RAX: ffff888095f024c0 RBX: ffff88821954b900 RCX: ffffffff814a14cb [ 76.661010] RDX: 0000000000000000 RSI: ffffffff814a1b7c RDI: 0000000000000001 [ 76.669758] RBP: ffff88808caf7778 R08: ffff888095f024c0 R09: ffffed101195eedd [ 76.677392] R10: ffffed101195eedc R11: 0000000000000003 R12: dffffc0000000000 [ 76.686461] R13: ffff88808caf7750 R14: 0000000000000000 R15: 0000000000000001 [ 76.694943] ? __flush_work+0x9b/0x8a0 [ 76.698919] ? __flush_work+0x74c/0x8a0 [ 76.703812] ? __flush_work+0x74c/0x8a0 [ 76.707937] ? insert_work+0x3a0/0x3a0 [ 76.711850] ? mark_held_locks+0xa4/0xf0 [ 76.715911] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.723205] ? refcount_sub_and_test_checked+0x154/0x200 [ 76.730190] ? refcount_dec_not_one+0x1f0/0x1f0 [ 76.735457] ? __drm_atomic_helper_crtc_destroy_state+0xf3/0x340 [ 76.742644] flush_work+0x18/0x20 [ 76.746618] vkms_atomic_crtc_destroy_state+0x2d/0x40 [ 76.752462] drm_atomic_state_default_clear+0x37c/0xd60 [ 76.757925] drm_atomic_state_clear+0x9d/0xc0 [ 76.763322] __drm_atomic_state_free+0x3c/0xf0 [ 76.767919] drm_atomic_helper_set_config+0xe5/0x160 [ 76.773565] drm_mode_setcrtc+0x613/0x1490 [ 76.778068] ? drm_mode_getcrtc+0x870/0x870 [ 76.782926] ? drm_dev_exit+0x22/0x60 [ 76.788516] ? find_held_lock+0x35/0x130 [ 76.793375] ? drm_dev_exit+0x22/0x60 [ 76.797521] ? drm_lease_owner+0x45/0x60 [ 76.801745] ? drm_is_current_master+0x5c/0x140 [ 76.807737] drm_ioctl_kernel+0x23b/0x2e0 [ 76.812217] ? drm_mode_getcrtc+0x870/0x870 [ 76.816728] ? drm_setversion+0x8c0/0x8c0 [ 76.820886] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 76.826705] ? _copy_from_user+0xdd/0x150 [ 76.830857] drm_ioctl+0x545/0xa50 [ 76.834390] ? drm_mode_getcrtc+0x870/0x870 [ 76.838916] ? drm_version+0x3d0/0x3d0 [ 76.843193] ? debug_check_no_obj_freed+0x200/0x464 [ 76.849021] ? trace_hardirqs_off+0x62/0x220 [ 76.853435] ? drm_version+0x3d0/0x3d0 [ 76.857611] do_vfs_ioctl+0xd6e/0x1390 [ 76.862149] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.867879] ? ioctl_preallocate+0x210/0x210 [ 76.872454] ? putname+0xef/0x130 [ 76.876843] ? putname+0xef/0x130 [ 76.881079] ? rcu_read_lock_sched_held+0x110/0x130 [ 76.886625] ? kmem_cache_free+0x225/0x260 [ 76.892569] ? putname+0xf4/0x130 [ 76.896244] ? do_sys_open+0x31d/0x5d0 [ 76.900151] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 76.905906] ? security_file_ioctl+0x93/0xc0 [ 76.910308] ksys_ioctl+0xab/0xd0 [ 76.913748] __x64_sys_ioctl+0x73/0xb0 [ 76.917620] do_syscall_64+0x103/0x610 [ 76.921495] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 76.926667] RIP: 0033:0x443ed9 [ 76.929841] Code: 21 02 00 85 c0 b8 00 00 00 00 48 0f 44 c3 5b c3 90 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 1b d8 fb ff c3 66 2e 0f 1f 84 00 00 00 00 [ 76.948896] RSP: 002b:00007ffdedf89d38 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 76.956604] RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000443ed9 [ 76.964032] RDX: 0000000020000180 RSI: 00000000c06864a2 RDI: 0000000000000003 [ 76.971288] RBP: 00000000006cf018 R08: 0000000000000000 R09: 6c616b7a79732f2e [ 76.978545] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401b80 [ 76.985801] R13: 0000000000401c10 R14: 0000000000000000 R15: 0000000000000000 [ 76.994226] Kernel Offset: disabled [ 76.997921] Rebooting in 86400 seconds..