======================================================
WARNING: possible circular locking dependency detected
6.2.0-rc3-syzkaller-00008-g1fe4fd6f5cad #0 Not tainted
------------------------------------------------------
syz-executor.5/11053 is trying to acquire lock:
ffff88801cfde0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfs_find_init+0x167/0x1e0

but task is already holding lock:
ffff88807a50ae78 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xde/0x1420 fs/hfs/extent.c:397

which lock already depends on the new lock.


the existing dependency chain (in reverse order) is:

-> #1 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}:
       lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668
       __mutex_lock_common+0x1bd/0x26e0 kernel/locking/mutex.c:603
       __mutex_lock kernel/locking/mutex.c:747 [inline]
       mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
       hfs_extend_file+0xde/0x1420 fs/hfs/extent.c:397
       hfs_bmap_reserve+0xfa/0x410 fs/hfs/btree.c:234
       __hfs_ext_write_extent+0x1ea/0x460 fs/hfs/extent.c:121
       __hfs_ext_cache_extent+0x67/0x980 fs/hfs/extent.c:174
       hfs_ext_read_extent fs/hfs/extent.c:202 [inline]
       hfs_extend_file+0x323/0x1420 fs/hfs/extent.c:401
       hfs_get_block+0x3fc/0xbb0 fs/hfs/extent.c:353
       __block_write_begin_int+0x54c/0x1a80 fs/buffer.c:1991
       __block_write_begin fs/buffer.c:2041 [inline]
       block_write_begin+0x93/0x1e0 fs/buffer.c:2102
       cont_write_begin+0x606/0x860 fs/buffer.c:2456
       hfs_write_begin+0x86/0xd0 fs/hfs/inode.c:58
       generic_perform_write+0x2e4/0x5e0 mm/filemap.c:3772
       __generic_file_write_iter+0x176/0x400 mm/filemap.c:3900
       generic_file_write_iter+0xab/0x310 mm/filemap.c:3932
       call_write_iter include/linux/fs.h:2189 [inline]
       new_sync_write fs/read_write.c:491 [inline]
       vfs_write+0x7dc/0xc50 fs/read_write.c:584
       ksys_write+0x177/0x2a0 fs/read_write.c:637
       do_syscall_x64 arch/x86/entry/common.c:50 [inline]
       do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

-> #0 (&tree->tree_lock/1){+.+.}-{3:3}:
       check_prev_add kernel/locking/lockdep.c:3097 [inline]
       check_prevs_add kernel/locking/lockdep.c:3216 [inline]
       validate_chain+0x1898/0x6ae0 kernel/locking/lockdep.c:3831
       __lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055
       lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668
       __mutex_lock_common+0x1bd/0x26e0 kernel/locking/mutex.c:603
       __mutex_lock kernel/locking/mutex.c:747 [inline]
       mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
       hfs_find_init+0x167/0x1e0
       hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
       hfs_extend_file+0x2f8/0x1420 fs/hfs/extent.c:401
       hfs_bmap_reserve+0xfa/0x410 fs/hfs/btree.c:234
       hfs_cat_create+0x1b5/0x8a0 fs/hfs/catalog.c:104
       hfs_create+0x62/0xd0 fs/hfs/dir.c:202
       lookup_open fs/namei.c:3413 [inline]
       open_last_lookups fs/namei.c:3481 [inline]
       path_openat+0x12ac/0x2dd0 fs/namei.c:3711
       do_filp_open+0x264/0x4f0 fs/namei.c:3741
       file_open_name fs/open.c:1255 [inline]
       filp_open+0x25a/0x2c0 fs/open.c:1275
       do_coredump+0x20e4/0x2830 fs/coredump.c:703
       get_signal+0x1446/0x17c0 kernel/signal.c:2845
       arch_do_signal_or_restart+0x7b/0x5e0 arch/x86/kernel/signal.c:306
       exit_to_user_mode_loop+0x74/0x150 kernel/entry/common.c:168
       exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
       __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
       syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
       do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
       entry_SYSCALL_64_after_hwframe+0x63/0xcd

other info that might help us debug this:

 Possible unsafe locking scenario:

       CPU0                    CPU1
       ----                    ----
  lock(&HFS_I(tree->inode)->extents_lock);
                               lock(&tree->tree_lock/1);
                               lock(&HFS_I(tree->inode)->extents_lock);
  lock(&tree->tree_lock/1);

 *** DEADLOCK ***

4 locks held by syz-executor.5/11053:
 #0: ffff888074e2e460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:508
 #1: ffff88807a50a9a8 (&type->i_mutex_dir_key#25
){++++}-{3:3}, at: inode_lock include/linux/fs.h:756 [inline]
){++++}-{3:3}, at: open_last_lookups fs/namei.c:3478 [inline]
){++++}-{3:3}, at: path_openat+0x7b9/0x2dd0 fs/namei.c:3711
 #2: ffff88807b4d20b0 (&tree->tree_lock){+.+.}-{3:3}, at: hfs_find_init+0x167/0x1e0
 #3: ffff88807a50ae78 (&HFS_I(tree->inode)->extents_lock){+.+.}-{3:3}, at: hfs_extend_file+0xde/0x1420 fs/hfs/extent.c:397

stack backtrace:
CPU: 1 PID: 11053 Comm: syz-executor.5 Not tainted 6.2.0-rc3-syzkaller-00008-g1fe4fd6f5cad #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
 check_noncircular+0x2cc/0x390 kernel/locking/lockdep.c:2177
 check_prev_add kernel/locking/lockdep.c:3097 [inline]
 check_prevs_add kernel/locking/lockdep.c:3216 [inline]
 validate_chain+0x1898/0x6ae0 kernel/locking/lockdep.c:3831
 __lock_acquire+0x1292/0x1f60 kernel/locking/lockdep.c:5055
 lock_acquire+0x182/0x3c0 kernel/locking/lockdep.c:5668
 __mutex_lock_common+0x1bd/0x26e0 kernel/locking/mutex.c:603
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799
 hfs_find_init+0x167/0x1e0
 hfs_ext_read_extent fs/hfs/extent.c:200 [inline]
 hfs_extend_file+0x2f8/0x1420 fs/hfs/extent.c:401
 hfs_bmap_reserve+0xfa/0x410 fs/hfs/btree.c:234
 hfs_cat_create+0x1b5/0x8a0 fs/hfs/catalog.c:104
 hfs_create+0x62/0xd0 fs/hfs/dir.c:202
 lookup_open fs/namei.c:3413 [inline]
 open_last_lookups fs/namei.c:3481 [inline]
 path_openat+0x12ac/0x2dd0 fs/namei.c:3711
 do_filp_open+0x264/0x4f0 fs/namei.c:3741
 file_open_name fs/open.c:1255 [inline]
 filp_open+0x25a/0x2c0 fs/open.c:1275
 do_coredump+0x20e4/0x2830 fs/coredump.c:703
 get_signal+0x1446/0x17c0 kernel/signal.c:2845
 arch_do_signal_or_restart+0x7b/0x5e0 arch/x86/kernel/signal.c:306
 exit_to_user_mode_loop+0x74/0x150 kernel/entry/common.c:168
 exit_to_user_mode_prepare+0xb2/0x140 kernel/entry/common.c:203
 __syscall_exit_to_user_mode_work kernel/entry/common.c:285 [inline]
 syscall_exit_to_user_mode+0x26/0x60 kernel/entry/common.c:296
 do_syscall_64+0x49/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f5f6c08c0c9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 f1 19 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f5f6ce8a168 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffe5 RBX: 00007f5f6c1ac120 RCX: 00007f5f6c08c0c9
RDX: 0000000000000000 RSI: 0000008000008001 RDI: 0000000000000004
RBP: 00007f5f6c0e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffe04d6177f R14: 00007f5f6ce8a300 R15: 0000000000022000
 </TASK>