============================================
WARNING: possible recursive locking detected
6.14.0-rc3-syzkaller-00137-g27eddbf34490 #0 Not tainted
--------------------------------------------
syz-executor380/5833 is trying to acquire lock:
ffff88807c5787c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_get_block+0x383/0x14f0 fs/hfsplus/extents.c:260

but task is already holding lock:
ffff888030848e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:458

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-executor380/5833:
 #0: ffff88807c6a2420 (sb_writers#9){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:3035 [inline]
 #0: ffff88807c6a2420 (sb_writers#9){.+.+}-{0:0}, at: vfs_write+0x225/0xd10 fs/read_write.c:675
 #1: ffff888030849078 (&sb->s_type->i_mutex_key#15){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:877 [inline]
 #1: ffff888030849078 (&sb->s_type->i_mutex_key#15){+.+.}-{4:4}, at: generic_file_write_iter+0xe0/0x5b0 mm/filemap.c:4313
 #2: ffff888030848e88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x21b/0x1b70 fs/hfsplus/extents.c:458
 #3: ffff8880271960f8 (&sbi->alloc_mutex){+.+.}-{4:4}, at: hfsplus_block_allocate+0x9e/0x8c0 fs/hfsplus/bitmap.c:35

stack backtrace:
CPU: 1 UID: 0 PID: 5833 Comm: syz-executor380 Not tainted 6.14.0-rc3-syzkaller-00137-g27eddbf34490 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_deadlock_bug+0x483/0x620 kernel/locking/lockdep.c:3039
 check_deadlock kernel/locking/lockdep.c:3091 [inline]
 validate_chain+0x15e2/0x5920 kernel/locking/lockdep.c:3893
 __lock_acquire+0x1397/0x2100 kernel/locking/lockdep.c:5228
 lock_acquire+0x1ed/0x550 kernel/locking/lockdep.c:5851
 __mutex_lock_common kernel/locking/mutex.c:585 [inline]
 __mutex_lock+0x19c/0x1010 kernel/locking/mutex.c:730
 hfsplus_get_block+0x383/0x14f0 fs/hfsplus/extents.c:260
 block_read_full_folio+0x3f0/0xae0 fs/buffer.c:2396
 filemap_read_folio+0x14a/0x3b0 mm/filemap.c:2390
 do_read_cache_folio+0x373/0x5b0 mm/filemap.c:3960
 do_read_cache_page mm/filemap.c:4026 [inline]
 read_cache_page+0x5b/0x170 mm/filemap.c:4035
 read_mapping_page include/linux/pagemap.h:1017 [inline]
 hfsplus_block_allocate+0xee/0x8c0 fs/hfsplus/bitmap.c:37
 hfsplus_file_extend+0xade/0x1b70 fs/hfsplus/extents.c:469
 hfsplus_get_block+0x406/0x14f0 fs/hfsplus/extents.c:245
 get_more_blocks fs/direct-io.c:648 [inline]
 do_direct_IO fs/direct-io.c:936 [inline]
 __blockdev_direct_IO+0x1c89/0x4890 fs/direct-io.c:1243
 blockdev_direct_IO include/linux/fs.h:3412 [inline]
 hfsplus_direct_IO+0xf7/0x1e0 fs/hfsplus/inode.c:129
 generic_file_direct_write+0x1e8/0x400 mm/filemap.c:4112
 __generic_file_write_iter+0x126/0x230 mm/filemap.c:4276
 generic_file_write_iter+0x10c/0x5b0 mm/filemap.c:4316
 new_sync_write fs/read_write.c:586 [inline]
 vfs_write+0xad1/0xd10 fs/read_write.c:679
 ksys_write+0x18f/0x2b0 fs/read_write.c:731
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7ff2aa3b3ad9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd7435a258 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007ff2aa3b3ad9
RDX: 000000000003fe00 RSI: 0000400000004200 RDI: 0000000000000004
RBP: 00007ff2aa4275f0 R08: 000055556d8f44c0 R09: 000055556d8f44c0
R10: 00000000000006dc R11: 0000000000000246 R12: 00007ffd7435a280
R13: 00007ffd7435a4a8 R14: 431bde82d7b634db R15: 00007ff2aa3fc03b
 </TASK>