[[0;32m OK [0m] Found device /dev/ttyS0.
[[0;32m OK [0m] Listening on Load/Save RF Kill Switch Status /dev/rfkill Watch.
[[0;32m OK [0m] Started Serial Getty on ttyS0.
[[0;32m OK [0m] Reached target Login Prompts.
[[0;32m OK [0m] Reached target Multi-User System.
[[0;32m OK [0m] Reached target Graphical Interface.
Starting Update UTMP about System Runlevel Changes...
[[0;32m OK [0m] Started Update UTMP about System Runlevel Changes.
Starting Load/Save RF Kill Switch Status...
[[0;32m OK [0m] Started Load/Save RF Kill Switch Status.
Debian GNU/Linux 9 syzkaller ttyS0
Warning: Permanently added '10.128.0.228' (ECDSA) to the list of known hosts.
executing program
syzkaller login: [ 27.449450] IPVS: ftp: loaded support on port[0] = 21
[ 27.514898] ntfs: volume version 3.1.
[ 27.649467] syz-executor247 (7961): drop_caches: 1
[ 27.678975] syz-executor247 (7961): drop_caches: 1
[ 27.688234]
[ 27.689861] ======================================================
[ 27.696204] WARNING: possible circular locking dependency detected
[ 27.702501] 4.14.301-syzkaller #0 Not tainted
[ 27.706971] ------------------------------------------------------
[ 27.713259] kworker/u4:1/22 is trying to acquire lock:
[ 27.718509] (&rl->lock){++++}, at: [<ffffffff82102946>] ntfs_readpage+0x1396/0x1ad0
[ 27.726377]
[ 27.726377] but task is already holding lock:
[ 27.732320] (&ni->mrec_lock){+.+.}, at: [<ffffffff8213d92b>] map_mft_record+0x2b/0xbe0
[ 27.740443]
[ 27.740443] which lock already depends on the new lock.
[ 27.740443]
[ 27.748737]
[ 27.748737] the existing dependency chain (in reverse order) is:
[ 27.756328]
[ 27.756328] -> #1 (&ni->mrec_lock){+.+.}:
[ 27.761942] __mutex_lock+0xc4/0x1310
[ 27.766239] map_mft_record+0x2b/0xbe0
[ 27.770623] ntfs_truncate+0x1a6/0x22d0
[ 27.775092] ntfs_setattr+0x148/0x580
[ 27.779387] notify_change+0x56b/0xd10
[ 27.783777] do_truncate+0xff/0x1a0
[ 27.787900] path_openat+0x1dcc/0x2970
[ 27.792278] do_filp_open+0x179/0x3c0
[ 27.796575] do_sys_open+0x296/0x410
[ 27.800786] do_syscall_64+0x1d5/0x640
[ 27.805175] entry_SYSCALL_64_after_hwframe+0x5e/0xd3
[ 27.810960]
[ 27.810960] -> #0 (&rl->lock){++++}:
[ 27.816135] lock_acquire+0x170/0x3f0
[ 27.820435] down_read+0x36/0x80
[ 27.824298] ntfs_readpage+0x1396/0x1ad0
[ 27.828859] do_read_cache_page+0x38e/0xc10
[ 27.833675] ntfs_sync_mft_mirror+0x1f4/0x1560
[ 27.838754] write_mft_record_nolock+0xece/0x1240
[ 27.844109] __ntfs_write_inode+0x58d/0xcc0
[ 27.849011] __writeback_single_inode+0x6a4/0x1010
[ 27.854466] writeback_sb_inodes+0x48b/0xd30
[ 27.859373] wb_writeback+0x243/0xb80
[ 27.863671] wb_workfn+0x2bd/0xf50
[ 27.867713] process_one_work+0x793/0x14a0
[ 27.872444] worker_thread+0x5cc/0xff0
[ 27.876910] kthread+0x30d/0x420
[ 27.880861] ret_from_fork+0x24/0x30
[ 27.885064]
[ 27.885064] other info that might help us debug this:
[ 27.885064]
[ 27.893266] Possible unsafe locking scenario:
[ 27.893266]
[ 27.899297] CPU0 CPU1
[ 27.903933] ---- ----
[ 27.908573] lock(&ni->mrec_lock);
[ 27.912193] lock(&rl->lock);
[ 27.917899] lock(&ni->mrec_lock);
[ 27.924188] lock(&rl->lock);
[ 27.927368]
[ 27.927368] *** DEADLOCK ***
[ 27.927368]
[ 27.933400] 3 locks held by kworker/u4:1/22:
[ 27.937776] #0: ("writeback"){+.+.}, at: [<ffffffff81366130>] process_one_work+0x6b0/0x14a0
[ 27.946419] #1: ((&(&wb->dwork)->work)){+.+.}, at: [<ffffffff81366166>] process_one_work+0x6e6/0x14a0
[ 27.955942] #2: (&ni->mrec_lock){+.+.}, at: [<ffffffff8213d92b>] map_mft_record+0x2b/0xbe0
[ 27.964525]
[ 27.964525] stack backtrace:
[ 27.969009] CPU: 0 PID: 22 Comm: kworker/u4:1 Not tainted 4.14.301-syzkaller #0
[ 27.976437] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
[ 27.985785] Workqueue: writeback wb_workfn (flush-7:0)
[ 27.991144] Call Trace:
[ 27.993718] dump_stack+0x1b2/0x281
[ 27.997325] print_circular_bug.constprop.0.cold+0x2d7/0x41e
[ 28.003101] __lock_acquire+0x2e0e/0x3f20
[ 28.007226] ? lock_downgrade+0x740/0x740
[ 28.011353] ? trace_hardirqs_on+0x10/0x10
[ 28.015567] ? alloc_buffer_head+0x20/0x110
[ 28.019875] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 28.025303] ? ntfs_readpage+0xba8/0x1ad0
[ 28.029427] lock_acquire+0x170/0x3f0
[ 28.033207] ? ntfs_readpage+0x1396/0x1ad0
[ 28.037419] down_read+0x36/0x80
[ 28.040761] ? ntfs_readpage+0x1396/0x1ad0
[ 28.044982] ntfs_readpage+0x1396/0x1ad0
[ 28.049023] ? __lru_cache_add+0x178/0x250
[ 28.053250] ? ntfs_end_buffer_async_read+0x10a0/0x10a0
[ 28.058605] ? add_to_page_cache_lru+0x136/0x2b0
[ 28.063346] ? add_to_page_cache_locked+0x40/0x40
[ 28.068174] ? alloc_pages_current+0x15d/0x260
[ 28.072740] do_read_cache_page+0x38e/0xc10
[ 28.077043] ? ntfs_end_buffer_async_read+0x10a0/0x10a0
[ 28.082385] ntfs_sync_mft_mirror+0x1f4/0x1560
[ 28.086945] ? ntfs_sync_mft_mirror+0x2b/0x1560
[ 28.091596] ? generic_make_request+0x850/0x850
[ 28.096247] ? guard_bio_eod+0x1ba/0x520
[ 28.100301] write_mft_record_nolock+0xece/0x1240
[ 28.105123] __ntfs_write_inode+0x58d/0xcc0
[ 28.109430] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 28.114911] __writeback_single_inode+0x6a4/0x1010
[ 28.119836] writeback_sb_inodes+0x48b/0xd30
[ 28.124227] ? wbc_detach_inode+0x780/0x780
[ 28.128620] ? queue_io+0x400/0x5a0
[ 28.132281] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 28.137712] wb_writeback+0x243/0xb80
[ 28.141499] ? writeback_inodes_wb.constprop.0+0x1a0/0x1a0
[ 28.147124] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 28.152643] wb_workfn+0x2bd/0xf50
[ 28.156164] ? process_one_work+0x6c4/0x14a0
[ 28.160554] ? inode_wait_for_writeback+0x30/0x30
[ 28.165372] ? lock_acquire+0x170/0x3f0
[ 28.169323] ? rcu_lockdep_current_cpu_online+0xed/0x140
[ 28.174751] process_one_work+0x793/0x14a0
[ 28.178967] ? work_busy+0x320/0x320
[ 28.182742] ? worker_thread+0x158/0xff0
[ 28.186779] ? _raw_spin_unlock_irq+0x24/0x80
[ 28.191252] worker_thread+0x5cc/0xff0
[ 28.195137] ? rescuer_thread+0xc80/0xc80
[ 28.199271] kthread+0x30d/0x420
[ 28.202631] ? kthread_create_on_node+0xd0/0xd0
[ 28.207282] ret_from_fork+0x24/0x30
[ 28.211605] ntfs: (device loop0): write_mft_record_nolock(): Failed to apply mst fixups!
[ 28.219936] ntfs: (device loop0): __ntfs_write_inode(): Failed (error 22): Run chkdsk.
[ 28.229241] ntfs: (devic