loop0: detected capacity change from 0 to 64
syz.0.0: attempt to access beyond end of device
loop0: rw=8388608, sector=25903, nr_sectors = 1 limit=64
Buffer I/O error on dev loop0, logical block 25903, async page read
syz.0.0: attempt to access beyond end of device
loop0: rw=8388608, sector=26319, nr_sectors = 1 limit=64
Buffer I/O error on dev loop0, logical block 26319, async page read
syz.0.0: attempt to access beyond end of device
loop0: rw=8388608, sector=26320, nr_sectors = 1 limit=64
Buffer I/O error on dev loop0, logical block 26320, async page read

============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz.0.0/5328 is trying to acquire lock:
ffff88805422e0a8 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x18d/0x300 fs/hfs/bfind.c:-1

but task is already holding lock:
ffff88805422e0a8 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x18d/0x300 fs/hfs/bfind.c:-1

other info that might help us debug this:
 Possible unsafe locking scenario:

       CPU0
       ----
  lock(&tree->tree_lock/1);
  lock(&tree->tree_lock/1);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

locks held by syz.0.0/5328: 6, last CPU#0:
 #0: ffff8880455620f0 (&f->f_pos_lock){+.+.}-{4:4}, at: fdget_pos+0x118/0x160 fs/file.c:1408
 #1: ffff888036d36460 (sb_writers#12){.+.+}-{0:0}, at: file_start_write include/linux/fs.h:2758 [inline]
 #1: ffff888036d36460 (sb_writers#12){.+.+}-{0:0}, at: vfs_write+0x22b/0xba0 fs/read_write.c:683
 #2: ffff888054233040 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: inode_lock include/linux/fs.h:1024 [inline]
 #2: ffff888054233040 (&sb->s_type->i_mutex_key#25){+.+.}-{4:4}, at: generic_file_write_iter+0x82/0x330 mm/filemap.c:4514
 #3: ffff888054232ea0 (&HFS_I(inode)->extents_lock){+.+.}-{4:4}, at: hfs_file_truncate+0x39b/0xb70 fs/hfs/extent.c:518
 #4: ffff88805422e0a8 (&tree->tree_lock/1){+.+.}-{4:4}, at: hfs_find_init+0x18d/0x300 fs/hfs/bfind.c:-1
 #5: ffff8880542340a0 (&HFS_I(tree->inode)->extents_lock){+.+.}-{4:4}, at: hfs_extend_file+0xf9/0x1680 fs/hfs/extent.c:403

stack backtrace:
CPU: 0 UID: 0 PID: 5328 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120
 print_deadlock_bug+0x27a/0x290 kernel/locking/lockdep.c:3085
 check_deadlock kernel/locking/lockdep.c:3137 [inline]
 validate_chain kernel/locking/lockdep.c:3939 [inline]
 __lock_acquire+0x25db/0x2de0 kernel/locking/lockdep.c:5288
 lock_acquire+0x115/0x350 kernel/locking/lockdep.c:5942
 __mutex_lock_common kernel/locking/mutex.c:646 [inline]
 __mutex_lock+0x197/0x15a0 kernel/locking/mutex.c:821
 hfs_find_init+0x18d/0x300 fs/hfs/bfind.c:-1
 hfs_ext_read_extent fs/hfs/extent.c:206 [inline]
 hfs_extend_file+0x367/0x1680 fs/hfs/extent.c:407
 hfs_bmap_reserve+0x108/0x430 fs/hfs/btree.c:402
 __hfs_ext_write_extent+0x200/0x620 fs/hfs/extent.c:121
 __hfs_ext_cache_extent+0x6e/0x9b0 fs/hfs/extent.c:180
 hfs_file_truncate+0x4e6/0xb70 fs/hfs/extent.c:533
 hfs_write_begin+0x178/0x1c0 fs/hfs/inode.c:66
 generic_perform_write+0x2d5/0x8e0 mm/filemap.c:4374
 generic_file_write_iter+0xae/0x330 mm/filemap.c:4517
 new_sync_write fs/read_write.c:595 [inline]
 vfs_write+0x612/0xba0 fs/read_write.c:687
 ksys_write+0x150/0x270 fs/read_write.c:739
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fa0ee99f559
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:00007fa0ef8effe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007fa0eec25fa0 RCX: 00007fa0ee99f559
RDX: 00000000fffffdef RSI: 0000200000000a40 RDI: 0000000000000004
RBP: 00007fa0eea36b20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fa0eec26038 R14: 00007fa0eec25fa0 R15: 00007ffd7316e978
 </TASK>