set_capacity_and_notify: 5 callbacks suppressed
loop3: detected capacity change from 0 to 1024
============================================
WARNING: possible recursive locking detected
syzkaller #0 Tainted: G             L     
--------------------------------------------
syz.3.321/8328 is trying to acquire lock:
ffff0000df2b1548 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_get_block+0x2d4/0x1268 fs/hfsplus/extents.c:260

but task is already holding lock:
ffff0000df2b07c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1b8/0x159c 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

5 locks held by syz.3.321/8328:
 #0: ffff0000c3bba0e0 (&type->s_umount_key#65/1){+.+.}-{4:4}, at: alloc_super+0x210/0x908 fs/super.c:344
 #1: ffff0000ca12a998 (&sbi->vh_mutex){+.+.}-{4:4}, at: hfsplus_fill_super+0xe08/0x1460 fs/hfsplus/super.c:594
 #2: ffff0000c7c820b0 (&tree->tree_lock){+.+.}-{4:4}, at: hfsplus_find_init+0x154/0x29c fs/hfsplus/bfind.c:28
 #3: ffff0000df2b07c8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfsplus_file_extend+0x1b8/0x159c fs/hfsplus/extents.c:453
 #4: ffff0000ca12a8f8 (&sbi->alloc_mutex){+.+.}-{4:4}, at: hfsplus_block_allocate+0x94/0x9ac fs/hfsplus/bitmap.c:35

stack backtrace:
CPU: 1 UID: 0 PID: 8328 Comm: syz.3.321 Tainted: G             L      syzkaller #0 PREEMPT 
Tainted: [L]=SOFTLOCKUP
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025
Call trace:
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C)
 __dump_stack+0x30/0x40 lib/dump_stack.c:94
 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120
 dump_stack+0x1c/0x28 lib/dump_stack.c:129
 print_deadlock_bug+0x2e8/0x2f0 kernel/locking/lockdep.c:3041
 check_deadlock kernel/locking/lockdep.c:3093 [inline]
 validate_chain kernel/locking/lockdep.c:3895 [inline]
 __lock_acquire+0x2940/0x30a4 kernel/locking/lockdep.c:5237
 lock_acquire+0x140/0x2e0 kernel/locking/lockdep.c:5868
 __mutex_lock_common+0x1d0/0x2678 kernel/locking/mutex.c:614
 __mutex_lock kernel/locking/mutex.c:776 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:828
 hfsplus_get_block+0x2d4/0x1268 fs/hfsplus/extents.c:260
 block_read_full_folio+0x2ec/0x824 fs/buffer.c:2420
 hfsplus_read_folio+0x28/0x38 fs/hfsplus/inode.c:28
 filemap_read_folio+0xec/0x2f8 mm/filemap.c:2496
 do_read_cache_folio+0x370/0x5c8 mm/filemap.c:4096
 do_read_cache_page mm/filemap.c:4162 [inline]
 read_cache_page+0x6c/0x160 mm/filemap.c:4171
 read_mapping_page include/linux/pagemap.h:1011 [inline]
 hfsplus_block_allocate+0xe4/0x9ac fs/hfsplus/bitmap.c:37
 hfsplus_file_extend+0x774/0x159c fs/hfsplus/extents.c:464
 hfsplus_bmap_reserve+0xe4/0x490 fs/hfsplus/btree.c:358
 hfsplus_create_cat+0x178/0xebc fs/hfsplus/catalog.c:272
 hfsplus_fill_super+0xe60/0x1460 fs/hfsplus/super.c:601
 get_tree_bdev_flags+0x360/0x414 fs/super.c:1691
 get_tree_bdev+0x2c/0x3c fs/super.c:1714
 hfsplus_get_tree+0x28/0x38 fs/hfsplus/super.c:680
 vfs_get_tree+0x90/0x28c fs/super.c:1751
 fc_mount fs/namespace.c:1199 [inline]
 do_new_mount_fc fs/namespace.c:3636 [inline]
 do_new_mount+0x284/0x944 fs/namespace.c:3712
 path_mount+0x5b4/0xdfc fs/namespace.c:4022
 do_mount fs/namespace.c:4035 [inline]
 __do_sys_mount fs/namespace.c:4224 [inline]
 __se_sys_mount fs/namespace.c:4201 [inline]
 __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4201
 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline]
 invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49
 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132
 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151
 el0_svc+0x5c/0x26c arch/arm64/kernel/entry-common.c:724
 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743
 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596
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