syzbot

WARNING: The mand mount option has been deprecated and
         and is ignored by this kernel. Remove the mand
         option from the mount to silence this warning.
=======================================================
============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz.0.17/6079 is trying to acquire lock:
ffff888035f69778 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_get_block+0x39a/0x15e0 fs/hfsplus/extents.c:260

but task is already holding lock:
ffff888035f68878 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1f8/0x1ba0 fs/hfsplus/extents.c:453

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

7 locks held by syz.0.17/6079:
 #0: ffff88803dbdc480 (sb_writers#12){.+.+}-{0:0}, at: mnt_want_write+0x41/0x90 fs/namespace.c:499
 #1: ffff888035f6a158 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: inode_lock_nested include/linux/fs.h:1072 [inline]
 #1: ffff888035f6a158 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: __start_dirop fs/namei.c:2864 [inline]
 #1: ffff888035f6a158 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: start_dirop fs/namei.c:2875 [inline]
 #1: ffff888035f6a158 (&type->i_mutex_dir_key#8/1){+.+.}-{4:4}, at: do_unlinkat+0x1b2/0x570 fs/namei.c:5420
 #2: ffff888035f6b058 (&sb->s_type->i_mutex_key#22){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1027 [inline]
 #2: ffff888035f6b058 (&sb->s_type->i_mutex_key#22){+.+.}-{4:4}, at: vfs_unlink+0xef/0x650 fs/namei.c:5355
 #3: ffff88803acab178 (&sbi->vh_mutex){+.+.}-{4:4}, at: hfsplus_unlink+0x163/0x740 fs/hfsplus/dir.c:370
 #4: ffff88803dbc20a0 (&tree->tree_lock){+.+.}-{4:4}, at: hfsplus_find_init+0x168/0x290 fs/hfsplus/bfind.c:28
 #5: ffff888035f68878 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1f8/0x1ba0 fs/hfsplus/extents.c:453
 #6: ffff88803acab0e8 (&sbi->alloc_mutex){+.+.}-{4:4}, at: hfsplus_block_allocate+0xa7/0xc40 fs/hfsplus/bitmap.c:35

stack backtrace:
CPU: 0 UID: 0 PID: 6079 Comm: syz.0.17 Not tainted syzkaller #0 PREEMPT_{RT,(full)} 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120
 print_deadlock_bug+0x279/0x290 kernel/locking/lockdep.c:3041
 check_deadlock kernel/locking/lockdep.c:3093 [inline]
 validate_chain kernel/locking/lockdep.c:3895 [inline]
 __lock_acquire+0x2540/0x2cf0 kernel/locking/lockdep.c:5237
 lock_acquire+0x117/0x340 kernel/locking/lockdep.c:5868
 __mutex_lock_common kernel/locking/rtmutex_api.c:533 [inline]
 mutex_lock_nested+0x5a/0x1d0 kernel/locking/rtmutex_api.c:552
 hfsplus_get_block+0x39a/0x15e0 fs/hfsplus/extents.c:260
 block_read_full_folio+0x29f/0x830 fs/buffer.c:2420
 filemap_read_folio+0x117/0x380 mm/filemap.c:2489
 do_read_cache_folio+0x2ba/0x560 mm/filemap.c:4082
 do_read_cache_page mm/filemap.c:4148 [inline]
 read_cache_page+0x5d/0x170 mm/filemap.c:4157
 read_mapping_page include/linux/pagemap.h:1003 [inline]
 hfsplus_block_allocate+0xf3/0xc40 fs/hfsplus/bitmap.c:37
 hfsplus_file_extend+0xa9a/0x1ba0 fs/hfsplus/extents.c:464
 hfsplus_bmap_reserve+0x125/0x500 fs/hfsplus/btree.c:358
 hfsplus_rename_cat+0x1b3/0xf10 fs/hfsplus/catalog.c:456
 hfsplus_unlink+0x2ea/0x740 fs/hfsplus/dir.c:376
 vfs_unlink+0x386/0x650 fs/namei.c:5369
 do_unlinkat+0x2cf/0x570 fs/namei.c:5439
 __do_sys_unlink fs/namei.c:5474 [inline]
 __se_sys_unlink fs/namei.c:5472 [inline]
 __x64_sys_unlink+0x47/0x50 fs/namei.c:5472
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xfa/0xf80 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f5eca34f749
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:00007ffe5da6f0e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f5eca5a5fa0 RCX: 00007f5eca34f749
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000200000000000
RBP: 00007f5eca3d3f91 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f5eca5a5fa0 R14: 00007f5eca5a5fa0 R15: 0000000000000001
 </TASK>
hfsplus: request for non-existent node 16777216 in B*Tree
hfsplus: request for non-existent node 16777216 in B*Tree
hfsplus: request for non-existent node 16777216 in B*Tree
hfsplus: request for non-existent node 16777216 in B*Tree
hfsplus: request for non-existent node 16777216 in B*Tree
hfsplus: request for non-existent node 16777216 in B*Tree
hfsplus: request for non-existent node 16777216 in B*Tree
hfsplus: request for non-existent node 16777216 in B*Tree
hfsplus: request for non-existent node 16777216 in B*Tree
hfsplus: request for non-existent node 16777216 in B*Tree
hfsplus: request for non-existent node 16777216 in B*Tree
hfsplus: request for non-existent node 16777216 in B*Tree