memfd_create() without MFD_EXEC nor MFD_NOEXEC_SEAL, pid=5966 'syz-executor860'
loop0: detected capacity change from 0 to 1024
============================================
WARNING: possible recursive locking detected
6.4.0-rc3-syzkaller-geb0f1697d729 #0 Not tainted
--------------------------------------------
syz-executor860/5966 is trying to acquire lock:
ffff0000dc3620b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc

but task is already holding lock:
ffff0000dc3620b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc

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-executor860/5966:
 #0: ffff0000c6f56460 (sb_writers#8){.+.+}-{0:0}, at: vfs_write+0x240/0x918 fs/read_write.c:580
 #1: ffff0000d692a4c0 (&sb->s_type->i_mutex_key#16){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline]
 #1: ffff0000d692a4c0 (&sb->s_type->i_mutex_key#16){+.+.}-{3:3}, at: generic_file_write_iter+0x88/0x2b4 mm/filemap.c:4080
 #2: ffff0000d692a2c8 (&hip->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x198/0x14cc fs/hfsplus/extents.c:457
 #3: ffff0000dc3620b0 (&tree->tree_lock/1){+.+.}-{3:3}, at: hfsplus_find_init+0x144/0x1bc
 #4: ffff0000d6928108 (&HFSPLUS_I(inode)->extents_lock){+.+.}-{3:3}, at: hfsplus_file_extend+0x198/0x14cc fs/hfsplus/extents.c:457

stack backtrace:
CPU: 0 PID: 5966 Comm: syz-executor860 Not tainted 6.4.0-rc3-syzkaller-geb0f1697d729 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233
 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 dump_stack+0x1c/0x28 lib/dump_stack.c:113
 __lock_acquire+0x6290/0x75f0
 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5691
 __mutex_lock_common+0x190/0x21a0 kernel/locking/mutex.c:603
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x2c/0x38 kernel/locking/mutex.c:799
 hfsplus_find_init+0x144/0x1bc
 hfsplus_ext_read_extent fs/hfsplus/extents.c:216 [inline]
 hfsplus_file_extend+0x364/0x14cc fs/hfsplus/extents.c:461
 hfsplus_bmap_reserve+0xec/0x474 fs/hfsplus/btree.c:358
 __hfsplus_ext_write_extent+0x1e8/0x4ac fs/hfsplus/extents.c:104
 __hfsplus_ext_cache_extent+0x84/0xa84 fs/hfsplus/extents.c:186
 hfsplus_ext_read_extent fs/hfsplus/extents.c:218 [inline]
 hfsplus_file_extend+0x390/0x14cc fs/hfsplus/extents.c:461
 hfsplus_get_block+0x398/0x1168 fs/hfsplus/extents.c:245
 __block_write_begin_int+0x460/0x1790 fs/buffer.c:2064
 __block_write_begin fs/buffer.c:2114 [inline]
 block_write_begin fs/buffer.c:2175 [inline]
 cont_write_begin+0x7b8/0xc78 fs/buffer.c:2534
 hfsplus_write_begin+0x98/0xe4 fs/hfsplus/inode.c:52
 generic_perform_write+0x278/0x55c mm/filemap.c:3923
 __generic_file_write_iter+0x168/0x388 mm/filemap.c:4051
 generic_file_write_iter+0xb8/0x2b4 mm/filemap.c:4083
 call_write_iter include/linux/fs.h:1868 [inline]
 new_sync_write fs/read_write.c:491 [inline]
 vfs_write+0x618/0x918 fs/read_write.c:584
 ksys_write+0x15c/0x26c fs/read_write.c:637
 __do_sys_write fs/read_write.c:649 [inline]
 __se_sys_write fs/read_write.c:646 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:646
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591