loop1: detected capacity change from 0 to 1024
============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz.1.12/5970 is trying to acquire lock:
ffff88810fba8108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_get_block+0x39e/0x1530

but task is already holding lock:
ffff88810fba9608 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1fc/0x1990

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

       CPU0
       ----
  lock(&HFSPLUS_I(inode)->extents_lock);
  lock(&HFSPLUS_I(inode)->extents_lock);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

4 locks held by syz.1.12/5970:
 #0: ffff88803c16c428 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90
 #1: ffff88810fba97f8 (&sb->s_type->i_mutex_key#22){+.+.}-{4:4}, at: do_truncate+0x171/0x220
 #2: ffff88810fba9608 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1fc/0x1990
 #3: ffff88803d7c68f8 (&sbi->alloc_mutex){+.+.}-{4:4}, at: hfsplus_block_allocate+0x94/0x9b0

stack backtrace:
CPU: 1 UID: 0 PID: 5970 Comm: syz.1.12 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_deadlock_bug+0x28b/0x2a0
 validate_chain+0x1a3f/0x2140
 __lock_acquire+0xab9/0xd20
 lock_acquire+0x120/0x360
 __mutex_lock+0x187/0x1350
 hfsplus_get_block+0x39e/0x1530
 block_read_full_folio+0x29f/0x830
 filemap_read_folio+0x117/0x380
 do_read_cache_folio+0x350/0x590
 read_cache_page+0x5d/0x170
 hfsplus_block_allocate+0xe4/0x9b0
 hfsplus_file_extend+0xae3/0x1990
 hfsplus_get_block+0x411/0x1530
 __block_write_begin_int+0x6b5/0x1900
 cont_write_begin+0x789/0xb50
 hfsplus_write_begin+0x66/0xb0
 cont_write_begin+0x2fd/0xb50
 hfsplus_write_begin+0x66/0xb0
 generic_cont_expand_simple+0x13f/0x210
 hfsplus_setattr+0x169/0x270
 notify_change+0xb36/0xe40
 do_truncate+0x1a4/0x220
 vfs_truncate+0x493/0x520
 do_sys_truncate+0xdb/0x190
 __x64_sys_truncate+0x5b/0x70
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fed3818ebe9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fed38f8f038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007fed383c5fa0 RCX: 00007fed3818ebe9
RDX: 0000000000000000 RSI: 000000000000c807 RDI: 0000200000000080
RBP: 00007fed38211e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fed383c6038 R14: 00007fed383c5fa0 R15: 00007ffec9bf9978
 </TASK>
