[ 34.602751] audit: type=1800 audit(1552009401.044:27): pid=7410 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 34.626206] audit: type=1800 audit(1552009401.054:28): pid=7410 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. [ 35.388336] audit: type=1800 audit(1552009401.884:29): pid=7410 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 [ 35.407790] audit: type=1800 audit(1552009401.884:30): pid=7410 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 '10.128.0.180' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.539642] WARNING: CPU: 1 PID: 7564 at kernel/workqueue.c:3020 __flush_work+0x74c/0x8a0 [ 48.548281] Kernel panic - not syncing: panic_on_warn set ... [ 48.554163] CPU: 1 PID: 7564 Comm: syz-executor067 Not tainted 5.0.0+ #11 [ 48.561072] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.570415] Call Trace: [ 48.572995] dump_stack+0x172/0x1f0 [ 48.576606] ? __flush_work+0x6d0/0x8a0 [ 48.580574] panic+0x2cb/0x65c [ 48.583758] ? __warn_printk+0xf3/0xf3 [ 48.587641] ? __flush_work+0x74c/0x8a0 [ 48.591605] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.597234] ? __warn.cold+0x5/0x45 [ 48.600863] ? __warn+0xe8/0x1d0 [ 48.604225] ? __flush_work+0x74c/0x8a0 [ 48.608198] __warn.cold+0x20/0x45 [ 48.611732] ? __flush_work+0x74c/0x8a0 [ 48.615700] report_bug+0x263/0x2b0 [ 48.619320] do_error_trap+0x11b/0x200 [ 48.623195] do_invalid_op+0x37/0x50 [ 48.626900] ? __flush_work+0x74c/0x8a0 [ 48.630861] invalid_op+0x14/0x20 [ 48.634304] RIP: 0010:__flush_work+0x74c/0x8a0 [ 48.638986] 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 [ 48.657887] RSP: 0018:ffff88809eb97608 EFLAGS: 00010293 [ 48.663236] RAX: ffff888082a2e680 RBX: ffff8880a547eb40 RCX: ffffffff814a14cb [ 48.670489] RDX: 0000000000000000 RSI: ffffffff814a1b7c RDI: 0000000000000001 [ 48.677740] RBP: ffff88809eb97778 R08: ffff888082a2e680 R09: ffffed1013d72edd [ 48.685155] R10: ffffed1013d72edc R11: 0000000000000003 R12: dffffc0000000000 [ 48.692419] R13: ffff88809eb97750 R14: 0000000000000000 R15: 0000000000000001 [ 48.699762] ? __flush_work+0x9b/0x8a0 [ 48.703649] ? __flush_work+0x74c/0x8a0 [ 48.707608] ? __flush_work+0x74c/0x8a0 [ 48.711569] ? insert_work+0x3a0/0x3a0 [ 48.715439] ? mark_held_locks+0xa4/0xf0 [ 48.719491] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.725017] ? refcount_sub_and_test_checked+0x154/0x200 [ 48.730452] ? refcount_dec_not_one+0x1f0/0x1f0 [ 48.735115] ? __drm_atomic_helper_crtc_destroy_state+0xf3/0x340 [ 48.741251] flush_work+0x18/0x20 [ 48.744686] vkms_atomic_crtc_destroy_state+0x2d/0x40 [ 48.749868] drm_atomic_state_default_clear+0x37c/0xd60 [ 48.755218] drm_atomic_state_clear+0x9d/0xc0 [ 48.759824] __drm_atomic_state_free+0x3c/0xf0 [ 48.764397] drm_atomic_helper_set_config+0xe5/0x160 [ 48.769490] drm_mode_setcrtc+0x613/0x1490 [ 48.773825] ? drm_mode_getcrtc+0x870/0x870 [ 48.778147] ? drm_dev_exit+0x22/0x60 [ 48.781943] ? find_held_lock+0x35/0x130 [ 48.785999] ? drm_dev_exit+0x22/0x60 [ 48.789803] ? drm_lease_owner+0x45/0x60 [ 48.793855] ? drm_is_current_master+0x5c/0x140 [ 48.798520] drm_ioctl_kernel+0x23b/0x2e0 [ 48.802666] ? drm_mode_getcrtc+0x870/0x870 [ 48.806981] ? drm_setversion+0x8c0/0x8c0 [ 48.811121] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.816645] ? _copy_from_user+0xdd/0x150 [ 48.820789] drm_ioctl+0x545/0xa50 [ 48.824312] ? drm_mode_getcrtc+0x870/0x870 [ 48.828701] ? drm_version+0x3d0/0x3d0 [ 48.832584] ? debug_check_no_obj_freed+0x200/0x464 [ 48.837600] ? trace_hardirqs_off+0x62/0x220 [ 48.842001] ? drm_version+0x3d0/0x3d0 [ 48.845874] do_vfs_ioctl+0xd6e/0x1390 [ 48.849747] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.855267] ? ioctl_preallocate+0x210/0x210 [ 48.859659] ? putname+0xef/0x130 [ 48.863091] ? putname+0xef/0x130 [ 48.866646] ? rcu_read_lock_sched_held+0x110/0x130 [ 48.871651] ? kmem_cache_free+0x225/0x260 [ 48.875872] ? putname+0xf4/0x130 [ 48.879320] ? do_sys_open+0x31d/0x5d0 [ 48.883211] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.888741] ? security_file_ioctl+0x93/0xc0 [ 48.893147] ksys_ioctl+0xab/0xd0 [ 48.896589] __x64_sys_ioctl+0x73/0xb0 [ 48.900463] do_syscall_64+0x103/0x610 [ 48.904343] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 48.909518] RIP: 0033:0x443de9 [ 48.912694] 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 [ 48.931680] RSP: 002b:00007ffda2636578 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 48.939392] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443de9 [ 48.946716] RDX: 0000000020000000 RSI: 00000000c06864a2 RDI: 0000000000000003 [ 48.954040] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 48.961306] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401af0 [ 48.968564] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 [ 48.976983] Kernel Offset: disabled [ 48.980670] Rebooting in 86400 seconds..