loop4: detected capacity change from 0 to 1024
hfsplus: invalid extended attribute record
============================================
WARNING: possible recursive locking detected
5.15.171-syzkaller #0 Not tainted
--------------------------------------------
syz.4.537/6372 is trying to acquire lock:
ffff88801fef3dc8 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x37f/0x14e0 fs/hfsplus/extents.c:260

but task is already holding lock:
ffff88801fef5208 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x30f/0xc70 fs/hfsplus/extents.c:577

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

6 locks held by syz.4.537/6372:
 #0: ffff888063946460 (sb_writers#22){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:377
 #1: ffff88801fef4680 (&type->i_mutex_dir_key#11/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:824 [inline]
 #1: ffff88801fef4680 (&type->i_mutex_dir_key#11/1){+.+.}-{3:3}, at: do_unlinkat+0x266/0x950 fs/namei.c:4331
 #2: ffff88801fef5400 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:789 [inline]
 #2: ffff88801fef5400 (&sb->s_type->i_mutex_key#33){+.+.}-{3:3}, at: vfs_unlink+0xe0/0x5f0 fs/namei.c:4269
 #3: ffff888076fde998 (&sbi->vh_mutex){+.+.}-{3:3}, at: hfsplus_unlink+0x15d/0x7f0 fs/hfsplus/dir.c:370
 #4: ffff88801fef5208 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_truncate+0x30f/0xc70 fs/hfsplus/extents.c:577
 #5: ffff888076fde8f8 (&sbi->alloc_mutex){+.+.}-{3:3}, at: hfsplus_block_free+0xb7/0x4f0 fs/hfsplus/bitmap.c:182

stack backtrace:
CPU: 1 PID: 6372 Comm: syz.4.537 Not tainted 5.15.171-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 print_deadlock_bug kernel/locking/lockdep.c:2946 [inline]
 check_deadlock kernel/locking/lockdep.c:2989 [inline]
 validate_chain+0x46d2/0x5930 kernel/locking/lockdep.c:3775
 __lock_acquire+0x1295/0x1ff0 kernel/locking/lockdep.c:5012
 lock_acquire+0x1db/0x4f0 kernel/locking/lockdep.c:5623
 __mutex_lock_common+0x1da/0x25a0 kernel/locking/mutex.c:596
 __mutex_lock kernel/locking/mutex.c:729 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:743
 hfsplus_get_block+0x37f/0x14e0 fs/hfsplus/extents.c:260
 block_read_full_page+0x2f9/0xde0 fs/buffer.c:2290
 do_read_cache_page+0x752/0x1040
 read_mapping_page include/linux/pagemap.h:515 [inline]
 hfsplus_block_free+0x120/0x4f0 fs/hfsplus/bitmap.c:185
 hfsplus_free_extents+0x17a/0xae0 fs/hfsplus/extents.c:363
 hfsplus_file_truncate+0x871/0xc70 fs/hfsplus/extents.c:592
 hfsplus_delete_inode+0x170/0x220
 hfsplus_unlink+0x50d/0x7f0 fs/hfsplus/dir.c:405
 vfs_unlink+0x359/0x5f0 fs/namei.c:4280
 do_unlinkat+0x4a3/0x950 fs/namei.c:4348
 __do_sys_unlinkat fs/namei.c:4391 [inline]
 __se_sys_unlinkat fs/namei.c:4384 [inline]
 __x64_sys_unlinkat+0xca/0xf0 fs/namei.c:4384
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f9c5b5b4719
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:00007f9c59a2c038 EFLAGS: 00000246 ORIG_RAX: 0000000000000107
RAX: ffffffffffffffda RBX: 00007f9c5b76bf80 RCX: 00007f9c5b5b4719
RDX: 0000000000000000 RSI: 0000000020000c40 RDI: ffffffffffffff9c
RBP: 00007f9c5b627616 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000000 R14: 00007f9c5b76bf80 R15: 00007ffe5c54af28
 </TASK>
hfsplus: unable to mark blocks free: error -5
hfsplus: can't free extent