[ 37.586516][ T26] audit: type=1800 audit(1549214103.912:26): pid=7579 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="mcstrans" dev="sda1" ino=2457 res=0 [ 37.622359][ T26] audit: type=1800 audit(1549214103.912:27): pid=7579 uid=0 auid=4294967295 ses=4294967295 subj==unconfined op=collect_data cause=failed(directio) comm="startpar" name="restorecond" dev="sda1" ino=2436 res=0 [ 37.643230][ T26] audit: type=1800 audit(1549214103.912:28): pid=7579 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. [ 38.535869][ T26] audit: type=1800 audit(1549214104.892:29): pid=7579 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 Debian GNU/Linux 7 syzkaller ttyS0 Warning: Permanently added '10.128.0.177' (ECDSA) to the list of known hosts. executing program executing program syzkaller login: [ 50.142432][ T7733] md0: error: bitmap file must be a regular file [ 50.206022][ T3473] WARNING: CPU: 1 PID: 3473 at kernel/workqueue.c:3018 __flush_work+0x74c/0x8a0 [ 50.215159][ T3473] Kernel panic - not syncing: panic_on_warn set ... [ 50.221747][ T3473] CPU: 1 PID: 3473 Comm: kworker/1:2 Not tainted 5.0.0-rc4-next-20190201 #25 [ 50.230491][ T3473] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 [ 50.240548][ T3473] Workqueue: md_misc mddev_delayed_delete [ 50.246254][ T3473] Call Trace: [ 50.249555][ T3473] dump_stack+0x172/0x1f0 [ 50.253893][ T3473] ? __flush_work+0x6e0/0x8a0 [ 50.258561][ T3473] panic+0x2cb/0x65c [ 50.262445][ T3473] ? __warn_printk+0xf3/0xf3 [ 50.267024][ T3473] ? __flush_work+0x74c/0x8a0 [ 50.271682][ T3473] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.277909][ T3473] ? __warn.cold+0x5/0x45 [ 50.282224][ T3473] ? __warn+0xe8/0x1d0 [ 50.286283][ T3473] ? __flush_work+0x74c/0x8a0 [ 50.290954][ T3473] __warn.cold+0x20/0x45 [ 50.295192][ T3473] ? __flush_work+0x74c/0x8a0 [ 50.299857][ T3473] report_bug+0x263/0x2b0 [ 50.304180][ T3473] do_error_trap+0x11b/0x200 [ 50.308760][ T3473] do_invalid_op+0x37/0x50 [ 50.313164][ T3473] ? __flush_work+0x74c/0x8a0 [ 50.317828][ T3473] invalid_op+0x14/0x20 [ 50.321974][ T3473] RIP: 0010:__flush_work+0x74c/0x8a0 [ 50.327258][ T3473] Code: 74 58 e8 47 b7 25 00 fb 66 0f 1f 44 00 00 45 31 e4 e9 86 fd ff ff e8 33 b7 25 00 0f 0b 45 31 e4 e9 77 fd ff ff e8 24 b7 25 00 <0f> 0b 45 31 e4 e9 68 fd ff ff e8 15 b7 25 00 4c 89 ff 45 31 e4 e8 [ 50.346852][ T3473] RSP: 0018:ffff88809b05f9a0 EFLAGS: 00010293 [ 50.352914][ T3473] RAX: ffff88809b7a85c0 RBX: ffff88809a35b2b8 RCX: ffffffff814a3dbb [ 50.360880][ T3473] RDX: 0000000000000000 RSI: ffffffff814a446c RDI: 0000000000000001 [ 50.368840][ T3473] RBP: ffff88809b05fb10 R08: ffff88809b7a85c0 R09: ffff88809b7a8e88 [ 50.376821][ T3473] R10: 0000000000000000 R11: 0000000000000000 R12: dffffc0000000000 [ 50.384784][ T3473] R13: ffff88809b05fae8 R14: 0000000000000001 R15: 0000000000000001 [ 50.392763][ T3473] ? __flush_work+0x9b/0x8a0 [ 50.397357][ T3473] ? __flush_work+0x74c/0x8a0 [ 50.402046][ T3473] ? insert_work+0x3a0/0x3a0 [ 50.406627][ T3473] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 50.412436][ T3473] ? debug_object_assert_init+0x17b/0x2f0 [ 50.418148][ T3473] ? _raw_spin_unlock_irqrestore+0x6b/0xe0 [ 50.423955][ T3473] ? lockdep_hardirqs_on+0x418/0x5d0 [ 50.429233][ T3473] ? trace_hardirqs_on+0x67/0x230 [ 50.434247][ T3473] ? try_to_del_timer_sync+0xc1/0x110 [ 50.439609][ T3473] ? mark_held_locks+0xa4/0xf0 [ 50.444362][ T3473] ? __cancel_work_timer+0xc4/0x520 [ 50.449545][ T3473] ? __cancel_work_timer+0x1d3/0x520 [ 50.454814][ T3473] ? cancel_work_sync+0x18/0x20 [ 50.459647][ T3473] ? __cancel_work_timer+0x1d3/0x520 [ 50.464918][ T3473] ? lockdep_hardirqs_on+0x418/0x5d0 [ 50.470369][ T3473] ? trace_hardirqs_on+0x67/0x230 [ 50.475387][ T3473] __cancel_work_timer+0x3bf/0x520 [ 50.480488][ T3473] ? try_to_grab_pending+0x710/0x710 [ 50.485760][ T3473] ? try_to_del_timer_sync+0xc1/0x110 [ 50.491118][ T3473] ? detach_if_pending+0x4f0/0x4f0 [ 50.496235][ T3473] ? lockdep_hardirqs_on+0x418/0x5d0 [ 50.501510][ T3473] ? trace_hardirqs_on+0x67/0x230 [ 50.506533][ T3473] cancel_work_sync+0x18/0x20 [ 50.511196][ T3473] blk_sync_queue+0x33/0x190 [ 50.515796][ T3473] ? __sanitizer_cov_trace_const_cmp4+0x16/0x20 [ 50.522027][ T3473] blk_cleanup_queue+0x100/0x200 [ 50.526961][ T3473] md_free+0xcb/0x1b0 [ 50.530936][ T3473] kobject_put.cold+0x28f/0x2ec [ 50.535799][ T3473] mddev_delayed_delete+0x34/0x40 [ 50.540815][ T3473] process_one_work+0x98e/0x1790 [ 50.545745][ T3473] ? pwq_dec_nr_in_flight+0x320/0x320 [ 50.551100][ T3473] ? lock_acquire+0x16f/0x3f0 [ 50.555767][ T3473] worker_thread+0x98/0xe40 [ 50.560257][ T3473] ? trace_hardirqs_on+0x67/0x230 [ 50.565293][ T3473] kthread+0x357/0x430 [ 50.569370][ T3473] ? process_one_work+0x1790/0x1790 [ 50.574557][ T3473] ? kthread_cancel_delayed_work_sync+0x20/0x20 [ 50.580803][ T3473] ret_from_fork+0x3a/0x50 [ 50.586458][ T3473] Kernel Offset: disabled [ 50.590867][ T3473] Rebooting in 86400 seconds..