Warning: Permanently added '10.128.1.99' (ECDSA) to the list of known hosts.
[   37.976517] IPVS: ftp: loaded support on port[0] = 21
executing program
[   38.080229] 
[   38.081891] ============================================
[   38.087540] WARNING: possible recursive locking detected
[   38.092977] 4.19.211-syzkaller #0 Not tainted
[   38.097456] --------------------------------------------
[   38.102891] kworker/u4:4/1530 is trying to acquire lock:
[   38.108345] 000000008d64b6c6 (&tree->tree_lock/1){+.+.}, at: hfs_find_init+0x17e/0x230
[   38.116414] 
[   38.116414] but task is already holding lock:
[   38.122370] 000000008d64b6c6 (&tree->tree_lock/1){+.+.}, at: hfs_find_init+0x17e/0x230
[   38.130596] 
[   38.130596] other info that might help us debug this:
[   38.137440]  Possible unsafe locking scenario:
[   38.137440] 
[   38.143478]        CPU0
[   38.146039]        ----
[   38.148597]   lock(&tree->tree_lock/1);
[   38.152584]   lock(&tree->tree_lock/1);
[   38.156904] 
[   38.156904]  *** DEADLOCK ***
[   38.156904] 
[   38.162947]  May be due to missing lock nesting notation
[   38.162947] 
[   38.169861] 4 locks held by kworker/u4:4/1530:
[   38.174518]  #0: 00000000a9ed9130 ((wq_completion)"writeback"){+.+.}, at: process_one_work+0x767/0x1570
[   38.184055]  #1: 00000000dc3b79d5 ((work_completion)(&(&wb->dwork)->work)){+.+.}, at: process_one_work+0x79c/0x1570
[   38.194691]  #2: 000000008d64b6c6 (&tree->tree_lock/1){+.+.}, at: hfs_find_init+0x17e/0x230
[   38.203550]  #3: 0000000083ad5da7 (&HFS_I(tree->inode)->extents_lock){+.+.}, at: hfs_extend_file+0x93/0xac0
[   38.213629] 
[   38.213629] stack backtrace:
[   38.218116] CPU: 1 PID: 1530 Comm: kworker/u4:4 Not tainted 4.19.211-syzkaller #0
[   38.225806] Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023
[   38.235150] Workqueue: writeback wb_workfn (flush-7:0)
[   38.240501] Call Trace:
[   38.243080]  dump_stack+0x1fc/0x2ef
[   38.246699]  __lock_acquire.cold+0x121/0x57e
[   38.251095]  ? mark_held_locks+0xf0/0xf0
[   38.255141]  ? _raw_spin_unlock_irqrestore+0x66/0xe0
[   38.260259]  ? depot_save_stack+0x258/0x410
[   38.264564]  ? kasan_kmalloc+0x139/0x160
[   38.268702]  ? __kmalloc+0x15a/0x3c0
[   38.272415]  ? hfs_find_init+0x91/0x230
[   38.276373]  ? hfs_ext_read_extent+0x191/0xa20
[   38.280940]  ? hfs_extend_file+0x4a0/0xac0
[   38.285165]  ? hfs_bmap_reserve+0x241/0x390
[   38.289470]  ? __hfs_ext_write_extent+0x3c1/0x510
[   38.294317]  ? hfs_ext_write_extent+0x1a2/0x1f0
[   38.298969]  ? hfs_write_inode+0x8f/0x930
[   38.303111]  ? __writeback_single_inode+0x733/0x11d0
[   38.308347]  ? writeback_sb_inodes+0x537/0xef0
[   38.312917]  ? wb_writeback+0x28d/0xcc0
[   38.316881]  ? wb_workfn+0x29b/0x1250
[   38.320676]  lock_acquire+0x170/0x3c0
[   38.324472]  ? hfs_find_init+0x17e/0x230
[   38.328521]  ? hfs_find_init+0x17e/0x230
[   38.332562]  __mutex_lock+0xd7/0x1190
[   38.336510]  ? hfs_find_init+0x17e/0x230
[   38.340557]  ? hfs_find_init+0x17e/0x230
[   38.344601]  ? mutex_trylock+0x1a0/0x1a0
[   38.348729]  ? lock_acquire+0x170/0x3c0
[   38.352687]  ? check_preemption_disabled+0x41/0x280
[   38.357708]  ? rcu_read_lock_sched_held+0x16c/0x1d0
[   38.362708]  ? __kmalloc+0x38e/0x3c0
[   38.366402]  ? hfs_find_init+0x91/0x230
[   38.370773]  hfs_find_init+0x17e/0x230
[   38.374679]  hfs_ext_read_extent+0x191/0xa20
[   38.379080]  ? __hfs_ext_write_extent+0x510/0x510
[   38.384104]  ? do_raw_spin_unlock+0x171/0x230
[   38.388611]  ? _raw_spin_unlock+0x29/0x40
[   38.392741]  hfs_extend_file+0x4a0/0xac0
[   38.396787]  ? hfs_free_fork+0x920/0x920
[   38.400850]  hfs_bmap_reserve+0x241/0x390
[   38.404985]  __hfs_ext_write_extent+0x3c1/0x510
[   38.409636]  hfs_ext_write_extent+0x1a2/0x1f0
[   38.414111]  ? hfs_ext_keycmp+0x300/0x300
[   38.418256]  ? mpage_writepages+0x1a4/0x230
[   38.422571]  ? __mpage_writepage+0x1570/0x1570
[   38.427437]  ? hfs_extend_file+0xac0/0xac0
[   38.431744]  hfs_write_inode+0x8f/0x930
[   38.435701]  ? hfs_inode_write_fork+0x1c0/0x1c0
[   38.440359]  ? do_writepages+0x1f5/0x290
[   38.444400]  ? __writeback_single_inode+0x306/0x11d0
[   38.449507]  ? lock_downgrade+0x720/0x720
[   38.453641]  ? lock_acquire+0x170/0x3c0
[   38.457692]  ? check_preemption_disabled+0x41/0x280
[   38.462698]  __writeback_single_inode+0x733/0x11d0
[   38.467637]  writeback_sb_inodes+0x537/0xef0
[   38.472378]  ? wbc_detach_inode+0x840/0x840
[   38.476688]  ? rcu_read_lock_sched_held+0x16c/0x1d0
[   38.481708]  ? queue_io+0x448/0x590
[   38.485421]  wb_writeback+0x28d/0xcc0
[   38.489218]  ? writeback_inodes_wb.constprop.0+0x1d0/0x1d0
[   38.494862]  wb_workfn+0x29b/0x1250
[   38.498527]  ? inode_wait_for_writeback+0x30/0x30
[   38.503544]  ? check_preemption_disabled+0x41/0x280
[   38.508605]  process_one_work+0x864/0x1570
[   38.512997]  ? pwq_dec_nr_in_flight+0x2d0/0x2d0
[   38.517790]  worker_thread+0x64c/0x1130
[   38.521998]  ? __kthread_parkme+0x133/0x1e0
[   38.526319]  ? process_one_work+0x1570/0x1570
[   38.530800]  kthread+0x33f/0x460
[   38.534152]  ? kthread_park+0x180/0x180
[   38.538134]  ret_from_fork+0x24/0x30