loop3: detected capacity change from 0 to 1024
======================================================
WARNING: possible circular locking dependency detected
5.15.161-syzkaller #0 Not tainted
------------------------------------------------------
syz-executor.3/6624 is trying to acquire lock:
ffff88805f175f88 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_get_block+0x37f/0x14e0 fs/hfsplus/extents.c:260

but task is already holding lock:
ffff8880570d60b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x146/0x1c0

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&tree->tree_lock){+.+.}-{3:3}:
       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_file_truncate+0x864/0xb80 fs/hfsplus/extents.c:595
       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_unlink fs/namei.c:4396 [inline]
       __se_sys_unlink fs/namei.c:4394 [inline]
       __x64_sys_unlink+0x45/0x50 fs/namei.c:4394
       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

-> #0 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3053 [inline]
       check_prevs_add kernel/locking/lockdep.c:3172 [inline]
       validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788
       __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]
       __hfs_bnode_create+0x4f2/0xbb0 fs/hfsplus/bnode.c:447
       hfsplus_bnode_find+0x22e/0xe80 fs/hfsplus/bnode.c:497
       hfsplus_brec_find+0x17f/0x570 fs/hfsplus/bfind.c:183
       hfsplus_brec_read+0x27/0x100 fs/hfsplus/bfind.c:222
       hfsplus_find_cat+0x17b/0x5c0 fs/hfsplus/catalog.c:202
       hfsplus_iget+0x403/0x640 fs/hfsplus/super.c:82
       hfsplus_fill_super+0xca4/0x1c90 fs/hfsplus/super.c:503
       mount_bdev+0x2c9/0x3f0 fs/super.c:1387
       legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
       vfs_get_tree+0x88/0x270 fs/super.c:1517
       do_new_mount+0x2ba/0xb40 fs/namespace.c:3005
       do_mount fs/namespace.c:3348 [inline]
       __do_sys_mount fs/namespace.c:3556 [inline]
       __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3533
       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

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&tree->tree_lock);
                               lock(&HFSPLUS_I(inode)->extents_lock);
                               lock(&tree->tree_lock);
  lock(&HFSPLUS_I(inode)->extents_lock);

 *** DEADLOCK ***

2 locks held by syz-executor.3/6624:
 #0: ffff88807589c0e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229
 #1: ffff8880570d60b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfsplus_find_init+0x146/0x1c0

stack backtrace:
CPU: 0 PID: 6624 Comm: syz-executor.3 Not tainted 5.15.161-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 check_noncircular+0x2f8/0x3b0 kernel/locking/lockdep.c:2133
 check_prev_add kernel/locking/lockdep.c:3053 [inline]
 check_prevs_add kernel/locking/lockdep.c:3172 [inline]
 validate_chain+0x1649/0x5930 kernel/locking/lockdep.c:3788