============================================
WARNING: possible recursive locking detected
6.9.0-rc4-syzkaller-g6a71d2909427 #0 Not tainted
--------------------------------------------
syz-executor.1/8032 is trying to acquire lock:
ffff0000c8c4a0b0
 (&tree->tree_lock#2/1){+.+.}-{3:3}, at: hfs_find_init+0x148/0x1c8

but task is already holding lock:
ffff0000c8c4a0b0 (&tree->tree_lock#2/1){+.+.}-{3:3}, at: hfs_find_init+0x148/0x1c8

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

       CPU0
       ----
  lock(&tree->tree_lock#2/1);
  lock(&tree->tree_lock#2/1);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

5 locks held by syz-executor.1/8032:
 #0: ffff0000c8514420 (sb_writers#24){.+.+}-{0:0}, at: do_ftruncate+0x1e4/0x4cc fs/open.c:178
 #1: ffff0000e8dfa9a8 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:795 [inline]
 #1: ffff0000e8dfa9a8 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: do_truncate fs/open.c:63 [inline]
 #1: ffff0000e8dfa9a8 (&sb->s_type->i_mutex_key#29){+.+.}-{3:3}, at: do_ftruncate+0x3d0/0x4cc fs/open.c:181
 #2: ffff0000e8dfa7f8 (&HFS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xe4/0x1130 fs/hfs/extent.c:397
 #3: ffff0000c8c4a0b0 (&tree->tree_lock#2/1){+.+.}-{3:3}, at: hfs_find_init+0x148/0x1c8
 #4: ffff0000e8df8df8 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xe4/0x1130 fs/hfs/extent.c:397

stack backtrace:
CPU: 1 PID: 8032 Comm: syz-executor.1 Not tainted 6.9.0-rc4-syzkaller-g6a71d2909427 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:317
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:324
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xe4/0x150 lib/dump_stack.c:114
 dump_stack+0x1c/0x28 lib/dump_stack.c:123
 print_deadlock_bug+0x4e4/0x660 kernel/locking/lockdep.c:3012
 check_deadlock kernel/locking/lockdep.c:3062 [inline]
 validate_chain kernel/locking/lockdep.c:3856 [inline]
 __lock_acquire+0x5fe4/0x763c kernel/locking/lockdep.c:5137
 lock_acquire+0x248/0x73c kernel/locking/lockdep.c:5754
 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:608
 __mutex_lock kernel/locking/mutex.c:752 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:804
 hfs_find_init+0x148/0x1c8
 hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
 hfs_extend_file+0x270/0x1130 fs/hfs/extent.c:401
 hfs_bmap_reserve+0xd0/0x3b4 fs/hfs/btree.c:234
 __hfs_ext_write_extent+0x1a0/0x468 fs/hfs/extent.c:121
 __hfs_ext_cache_extent+0x84/0x754 fs/hfs/extent.c:174
 hfs_ext_read_extent fs/hfs/extent.c:202 [inline]
 hfs_extend_file+0x29c/0x1130 fs/hfs/extent.c:401
 hfs_get_block+0x3b8/0x9e0 fs/hfs/extent.c:353
 __block_write_begin_int+0x580/0x166c fs/buffer.c:2105
 __block_write_begin fs/buffer.c:2154 [inline]
 block_write_begin fs/buffer.c:2213 [inline]
 cont_write_begin+0x79c/0xc40 fs/buffer.c:2567
 hfs_write_begin+0x98/0xe4 fs/hfs/inode.c:53
 cont_expand_zero fs/buffer.c:2494 [inline]
 cont_write_begin+0x2d8/0xc40 fs/buffer.c:2557
 hfs_write_begin+0x98/0xe4 fs/hfs/inode.c:53
 hfs_file_truncate+0x1a4/0xeb0 fs/hfs/extent.c:494
 hfs_inode_setattr+0x3a0/0x558 fs/hfs/inode.c:652
 notify_change+0x9d4/0xc84 fs/attr.c:497
 do_truncate fs/open.c:65 [inline]
 do_ftruncate+0x3e4/0x4cc fs/open.c:181
 do_sys_ftruncate fs/open.c:199 [inline]
 __do_sys_ftruncate fs/open.c:207 [inline]
 __se_sys_ftruncate fs/open.c:205 [inline]
 __arm64_sys_ftruncate+0x94/0xec fs/open.c:205
 __invoke_syscall arch/arm64/kernel/syscall.c:34 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:48
 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:133
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:152
 el0_svc+0x54/0x168 arch/arm64/kernel/entry-common.c:712
 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:730
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:598