============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz.7.669/10816 is trying to acquire lock:
ffff8881bf150f08 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_get_block+0x39e/0x1670

but task is already holding lock:
ffff8881bf152408 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70

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.7.669/10816:
 #0: ffff888161abc420 (sb_writers#14){.+.+}-{0:0}, at: vfs_write+0x227/0xb90
 #1: ffff8881bf1525f8 (&sb->s_type->i_mutex_key#26){+.+.}-{4:4}, at: generic_file_write_iter+0x11e/0x680
 #2: ffff8881bf152408 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x215/0x1d70
 #3: ffff8881acb948f8 (&sbi->alloc_mutex){+.+.}-{4:4}, at: hfsplus_block_allocate+0xa7/0xce0

stack backtrace:
CPU: 1 UID: 0 PID: 10816 Comm: syz.7.669 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+0xe8/0x150
 print_deadlock_bug+0x279/0x290
 __lock_acquire+0x253f/0x2cf0
 lock_acquire+0xf0/0x2e0
 __mutex_lock+0x19f/0x1300
 hfsplus_get_block+0x39e/0x1670
 block_read_full_folio+0x29f/0x830
 filemap_read_folio+0x137/0x3b0
 do_read_cache_folio+0x358/0x590
 read_cache_page+0x5d/0x170
 hfsplus_block_allocate+0xf3/0xce0
 hfsplus_file_extend+0xb2d/0x1d70
 hfsplus_get_block+0x42c/0x1670
 __block_write_begin_int+0x6c6/0x1910
 cont_write_begin+0x737/0xae0
 hfsplus_write_begin+0x66/0xb0
 cont_write_begin+0x2e7/0xae0
 hfsplus_write_begin+0x66/0xb0
 generic_perform_write+0x2e2/0x8f0
 generic_file_write_iter+0x14a/0x680
 vfs_write+0x61d/0xb90
 __x64_sys_pwrite64+0x199/0x230
 do_syscall_64+0x14d/0xf80
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f6788f9c799
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f6789df2028 EFLAGS: 00000246 ORIG_RAX: 0000000000000012
RAX: ffffffffffffffda RBX: 00007f6789215fa0 RCX: 00007f6788f9c799
RDX: 0000000000000004 RSI: 0000200000002d80 RDI: 0000000000000005
RBP: 00007f6789032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000000fffd R11: 0000000000000246 R12: 0000000000000000
R13: 00007f6789216038 R14: 00007f6789215fa0 R15: 00007ffdaf7a0eb8
 </TASK>
overlay: filesystem on ./bus not supported
