[ 37.663500] audit: type=1800 audit(1552003266.694:28): pid=7633 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. [ 38.322152] audit: type=1800 audit(1552003267.454:29): pid=7633 uid=0 auid=4294967295 ses=4294967295 subj=_ op=collect_data cause=failed(directio) comm="startpar" name="rc.local" dev="sda1" ino=2432 res=0 [ 38.340990] audit: type=1800 audit(1552003267.454:30): pid=7633 uid=0 auid=4294967295 ses=4294967295 subj=_ 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 '10.128.10.13' (ECDSA) to the list of known hosts. executing program syzkaller login: [ 48.713058] WARNING: CPU: 1 PID: 7808 at kernel/workqueue.c:3020 __flush_work+0x74c/0x8a0 [ 48.721637] Kernel panic - not syncing: panic_on_warn set ... [ 48.727517] CPU: 1 PID: 7808 Comm: syz-executor498 Not tainted 5.0.0+ #11 [ 48.734436] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 48.743784] Call Trace: [ 48.746362] dump_stack+0x172/0x1f0 [ 48.749991] ? __flush_work+0x6d0/0x8a0 [ 48.753956] panic+0x2cb/0x65c [ 48.757132] ? __warn_printk+0xf3/0xf3 [ 48.761011] ? __flush_work+0x74c/0x8a0 [ 48.764968] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.770612] ? __warn.cold+0x5/0x45 [ 48.774225] ? __warn+0xe8/0x1d0 [ 48.777577] ? __flush_work+0x74c/0x8a0 [ 48.781535] __warn.cold+0x20/0x45 [ 48.785108] ? __flush_work+0x74c/0x8a0 [ 48.789077] report_bug+0x263/0x2b0 [ 48.792778] do_error_trap+0x11b/0x200 [ 48.796658] do_invalid_op+0x37/0x50 [ 48.800358] ? __flush_work+0x74c/0x8a0 [ 48.804331] invalid_op+0x14/0x20 [ 48.807783] RIP: 0010:__flush_work+0x74c/0x8a0 [ 48.812469] 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 [ 48.831488] RSP: 0018:ffff88809e1af608 EFLAGS: 00010293 [ 48.836843] RAX: ffff88808e0541c0 RBX: ffff88821967bd40 RCX: ffffffff814a14cb [ 48.844101] RDX: 0000000000000000 RSI: ffffffff814a1b7c RDI: 0000000000000001 [ 48.851354] RBP: ffff88809e1af778 R08: ffff88808e0541c0 R09: ffffed1013c35edd [ 48.858608] R10: ffffed1013c35edc R11: 0000000000000003 R12: dffffc0000000000 [ 48.865868] R13: ffff88809e1af750 R14: 0000000000000000 R15: 0000000000000001 [ 48.873138] ? __flush_work+0x9b/0x8a0 [ 48.877009] ? __flush_work+0x74c/0x8a0 [ 48.880976] ? __flush_work+0x74c/0x8a0 [ 48.884954] ? insert_work+0x3a0/0x3a0 [ 48.888844] ? mark_held_locks+0xa4/0xf0 [ 48.892900] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 48.898426] ? refcount_sub_and_test_checked+0x154/0x200 [ 48.903875] ? refcount_dec_not_one+0x1f0/0x1f0 [ 48.908535] ? __drm_atomic_helper_crtc_destroy_state+0xf3/0x340 [ 48.914669] flush_work+0x18/0x20 [ 48.918113] vkms_atomic_crtc_destroy_state+0x2d/0x40 [ 48.923296] drm_atomic_state_default_clear+0x37c/0xd60 [ 48.928654] drm_atomic_state_clear+0x9d/0xc0 [ 48.933139] __drm_atomic_state_free+0x3c/0xf0 [ 48.937709] drm_atomic_helper_set_config+0xe5/0x160 [ 48.942799] drm_mode_setcrtc+0x613/0x1490 [ 48.947072] ? drm_mode_getcrtc+0x870/0x870 [ 48.951390] ? drm_dev_exit+0x22/0x60 [ 48.955174] ? find_held_lock+0x35/0x130 [ 48.959220] ? drm_dev_exit+0x22/0x60 [ 48.963057] ? drm_lease_owner+0x45/0x60 [ 48.967220] ? drm_is_current_master+0x5c/0x140 [ 48.972026] drm_ioctl_kernel+0x23b/0x2e0 [ 48.976202] ? drm_mode_getcrtc+0x870/0x870 [ 48.980519] ? drm_setversion+0x8c0/0x8c0 [ 48.984658] ? __sanitizer_cov_trace_const_cmp8+0x18/0x20 [ 48.990183] ? _copy_from_user+0xdd/0x150 [ 48.994397] drm_ioctl+0x545/0xa50 [ 48.997946] ? drm_mode_getcrtc+0x870/0x870 [ 49.002272] ? drm_version+0x3d0/0x3d0 [ 49.006144] ? smack_log+0x415/0x540 [ 49.009854] ? debug_check_no_obj_freed+0x200/0x464 [ 49.014871] ? smk_tskacc+0x2ba/0x390 [ 49.018659] ? drm_version+0x3d0/0x3d0 [ 49.022533] do_vfs_ioctl+0xd6e/0x1390 [ 49.026400] ? smk_curacc+0x7f/0xa0 [ 49.030009] ? ioctl_preallocate+0x210/0x210 [ 49.034441] ? smack_file_ioctl+0x196/0x300 [ 49.038760] ? smack_file_lock+0x240/0x240 [ 49.042980] ? rcu_read_lock_sched_held+0x110/0x130 [ 49.047981] ? kmem_cache_free+0x1d1/0x260 [ 49.052212] ? do_sys_open+0x31d/0x5d0 [ 49.056098] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 49.061637] ? security_file_ioctl+0x93/0xc0 [ 49.066033] ksys_ioctl+0xab/0xd0 [ 49.069482] __x64_sys_ioctl+0x73/0xb0 [ 49.073373] do_syscall_64+0x103/0x610 [ 49.077369] entry_SYSCALL_64_after_hwframe+0x49/0xbe [ 49.082568] RIP: 0033:0x443de9 [ 49.085744] 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 [ 49.104629] RSP: 002b:00007ffe64b8d758 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 [ 49.112321] RAX: ffffffffffffffda RBX: 00000000004002e0 RCX: 0000000000443de9 [ 49.119623] RDX: 0000000020000000 RSI: 00000000c06864a2 RDI: 0000000000000003 [ 49.126877] RBP: 00000000006ce018 R08: 0000000000000000 R09: 00000000004002e0 [ 49.134138] R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401af0 [ 49.141391] R13: 0000000000401b80 R14: 0000000000000000 R15: 0000000000000000 [ 49.149473] Kernel Offset: disabled [ 49.153160] Rebooting in 86400 seconds..