memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=4995 'syz-executor974'
loop0: detected capacity change from 0 to 1024
============================================
WARNING: possible recursive locking detected
6.4.0-syzkaller-10098-g995b406c7e97 #0 Not tainted
--------------------------------------------
syz-executor974/4995 is trying to acquire lock:
ffff88807e7ec0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x174/0x230 fs/hfsplus/bfind.c:33

but task is already holding lock:
ffff88807e7ec0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x174/0x230 fs/hfsplus/bfind.c:33

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

5 locks held by syz-executor974/4995:
 #0: ffff88807e7ea410 (sb_writers#9){.+.+}-{0:0}, at: ksys_write+0x122/0x250 fs/read_write.c:637
 #1: ffff88807a0aa4c0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
 #1: ffff88807a0aa4c0 (&sb->s_type->i_mutex_key#15){+.+.}-{3:3}, at: generic_file_write_iter+0x92/0x350 mm/filemap.c:4041
 #2: ffff88807a0aa2c8 (&hip->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x1bf/0xf90 fs/hfsplus/extents.c:457
 #3: ffff88807e7ec0b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x174/0x230 fs/hfsplus/bfind.c:33
 #4: ffff88807a0a8108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x1bf/0xf90 fs/hfsplus/extents.c:457

stack backtrace:
CPU: 0 PID: 4995 Comm: syz-executor974 Not tainted 6.4.0-syzkaller-10098-g995b406c7e97 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/27/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 check_deadlock kernel/locking/lockdep.c:3070 [inline]
 validate_chain kernel/locking/lockdep.c:3863 [inline]
 __lock_acquire+0x2a33/0x5e20 kernel/locking/lockdep.c:5144
 lock_acquire kernel/locking/lockdep.c:5761 [inline]
 lock_acquire+0x1b1/0x520 kernel/locking/lockdep.c:5726
 __mutex_lock_common kernel/locking/mutex.c:603 [inline]
 __mutex_lock+0x12f/0x1350 kernel/locking/mutex.c:747
 hfsplus_find_init+0x174/0x230 fs/hfsplus/bfind.c:33
 hfsplus_ext_read_extent+0x185/0xae0 fs/hfsplus/extents.c:216
 hfsplus_file_extend+0x684/0xf90 fs/hfsplus/extents.c:461
 hfsplus_bmap_reserve+0x31c/0x410 fs/hfsplus/btree.c:358
 __hfsplus_ext_write_extent+0x44b/0x5b0 fs/hfsplus/extents.c:104
 __hfsplus_ext_cache_extent fs/hfsplus/extents.c:186 [inline]
 hfsplus_ext_read_extent+0x845/0xae0 fs/hfsplus/extents.c:218
 hfsplus_file_extend+0x684/0xf90 fs/hfsplus/extents.c:461
 hfsplus_get_block+0x1b3/0x9b0 fs/hfsplus/extents.c:245
 __block_write_begin_int+0x3b1/0x14a0 fs/buffer.c:2128
 __block_write_begin fs/buffer.c:2178 [inline]
 block_write_begin+0xb9/0x4d0 fs/buffer.c:2239
 cont_write_begin+0x534/0x740 fs/buffer.c:2597
 hfsplus_write_begin+0x87/0x150 fs/hfsplus/inode.c:52
 generic_perform_write+0x26b/0x5d0 mm/filemap.c:3923
 __generic_file_write_iter+0x1f8/0x240 mm/filemap.c:4018
 generic_file_write_iter+0xe3/0x350 mm/filemap.c:4044
 call_write_iter include/linux/fs.h:1871 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x981/0xda0 fs/read_write.c:584
 ksys_write+0x122/0x250 fs/read_write.c:637
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fcafe0f47d9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe66802938 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fcafe0f47d9
RDX: 00000000fffffff0 RSI: 0000000020004200 RDI: 0000000000000004
RBP: 00007fcafe0b4070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000647 R11: 0000000000000246 R12: 00007fcafe0b4100
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>