hfsplus: b-tree write err: -5, ino 3
============================================
WARNING: possible recursive locking detected
5.15.158-syzkaller #0 Not tainted
--------------------------------------------
kworker/u4:4/345 is trying to acquire lock:
ffff0000c94a40b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc

but task is already holding lock:
ffff0000c94a40b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&tree->tree_lock/1);
  lock(&tree->tree_lock/1);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

5 locks held by kworker/u4:4/345:
 #0: ffff0000c21c8138 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x66c/0x11b8 kernel/workqueue.c:2283
 #1: ffff80001a937c00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x6ac/0x11b8 kernel/workqueue.c:2285
 #2: ffff0000c9882988 (&hip->extents_lock){+.+.}-{3:3}, at: hfsplus_ext_write_extent+0x8c/0x1d8 fs/hfsplus/extents.c:149
 #3: ffff0000c94a40b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc
 #4: ffff0000c9880108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x198/0x14e0 fs/hfsplus/extents.c:457

stack backtrace:
CPU: 0 PID: 345 Comm: kworker/u4:4 Not tainted 5.15.158-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Workqueue: writeback wb_workfn (flush-7:0)
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 dump_stack+0x1c/0x58 lib/dump_stack.c:113
 __lock_acquire+0x62bc/0x7638 kernel/locking/lockdep.c:5012
 lock_acquire+0x240/0x77c kernel/locking/lockdep.c:5623
 __mutex_lock_common+0x194/0x2154 kernel/locking/mutex.c:596
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0xa4/0xf8 kernel/locking/mutex.c:743
 hfsplus_find_init+0x144/0x1bc
 hfsplus_ext_read_extent fs/hfsplus/extents.c:216 [inline]
 hfsplus_file_extend+0x364/0x14e0 fs/hfsplus/extents.c:461
 hfsplus_bmap_reserve+0xec/0x474 fs/hfsplus/btree.c:357
 __hfsplus_ext_write_extent+0x1e8/0x4bc fs/hfsplus/extents.c:104
 hfsplus_ext_write_extent_locked fs/hfsplus/extents.c:139 [inline]
 hfsplus_ext_write_extent+0x158/0x1d8 fs/hfsplus/extents.c:150
 hfsplus_write_inode+0x34/0x4ec fs/hfsplus/super.c:154
 write_inode fs/fs-writeback.c:1495 [inline]
 __writeback_single_inode+0x584/0x13a4 fs/fs-writeback.c:1705
 writeback_sb_inodes+0x94c/0x1654 fs/fs-writeback.c:1930
 wb_writeback+0x3fc/0xfc8 fs/fs-writeback.c:2104
 wb_do_writeback fs/fs-writeback.c:2247 [inline]
 wb_workfn+0x3a4/0x1070 fs/fs-writeback.c:2288
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2310
 worker_thread+0x910/0x1034 kernel/workqueue.c:2457
 kthread+0x37c/0x45c kernel/kthread.c:334
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870