loop0: detected capacity change from 0 to 40427
F2FS-fs (loop0): Invalid log_blocksize (268), supports only 12
F2FS-fs (loop0): Can't find valid F2FS filesystem in 1th superblock
F2FS-fs (loop0): Found nat_bits in checkpoint
F2FS-fs (loop0): Try to recover 1th superblock, ret: 0
F2FS-fs (loop0): Mounted with checkpoint version = 48b305e5
============================================
WARNING: possible recursive locking detected
6.5.0-rc1-syzkaller-00002-gf6f338f5680b #0 Not tainted
--------------------------------------------
syz-executor.0/5430 is trying to acquire lock:
ffff888065b99628 (&fi->i_sem){++++}-{3:3}, at: f2fs_down_write fs/f2fs/f2fs.h:2132 [inline]
ffff888065b99628 (&fi->i_sem){++++}-{3:3}, at: f2fs_add_inline_entry+0x2c4/0x6c0 fs/f2fs/inline.c:644

but task is already holding lock:
ffff888065b955e8 (&fi->i_sem){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2107 [inline]
ffff888065b955e8 (&fi->i_sem){++++}-{3:3}, at: f2fs_add_dentry+0x3e/0x270 fs/f2fs/dir.c:784

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

       CPU0
       ----
  lock(&fi->i_sem);
  lock(&fi->i_sem);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

4 locks held by syz-executor.0/5430:
 #0: ffff88802de5a410 (sb_writers#14){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3549 [inline]
 #0: ffff88802de5a410 (sb_writers#14){.+.+}-{0:0}, at: path_openat+0x26da/0x2710 fs/namei.c:3790
 #1: ffff888065b95210 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:771 [inline]
 #1: ffff888065b95210 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: open_last_lookups fs/namei.c:3557 [inline]
 #1: ffff888065b95210 (&type->i_mutex_dir_key#8){+.+.}-{3:3}, at: path_openat+0x903/0x2710 fs/namei.c:3790
 #2: ffff888074f303b0 (&sbi->cp_rwsem){.+.+}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2107 [inline]
 #2: ffff888074f303b0 (&sbi->cp_rwsem){.+.+}-{3:3}, at: f2fs_lock_op fs/f2fs/f2fs.h:2150 [inline]
 #2: ffff888074f303b0 (&sbi->cp_rwsem){.+.+}-{3:3}, at: f2fs_create+0x2e1/0x670 fs/f2fs/namei.c:376
 #3: ffff888065b955e8 (&fi->i_sem){++++}-{3:3}, at: f2fs_down_read fs/f2fs/f2fs.h:2107 [inline]
 #3: ffff888065b955e8 (&fi->i_sem){++++}-{3:3}, at: f2fs_add_dentry+0x3e/0x270 fs/f2fs/dir.c:784

stack backtrace:
CPU: 1 PID: 5430 Comm: syz-executor.0 Not tainted 6.5.0-rc1-syzkaller-00002-gf6f338f5680b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/03/2023
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
 down_write+0x92/0x200 kernel/locking/rwsem.c:1573
 f2fs_down_write fs/f2fs/f2fs.h:2132 [inline]
 f2fs_add_inline_entry+0x2c4/0x6c0 fs/f2fs/inline.c:644
 f2fs_add_dentry+0xac/0x270 fs/f2fs/dir.c:791
 f2fs_do_add_link+0x183/0x270 fs/f2fs/dir.c:835
 f2fs_add_link fs/f2fs/f2fs.h:3553 [inline]
 f2fs_create+0x3c1/0x670 fs/f2fs/namei.c:377
 lookup_open.isra.0+0x1050/0x1400 fs/namei.c:3492
 open_last_lookups fs/namei.c:3560 [inline]
 path_openat+0x969/0x2710 fs/namei.c:3790
 do_filp_open+0x1ba/0x410 fs/namei.c:3820
 do_sys_openat2+0x160/0x1c0 fs/open.c:1407
 do_sys_open fs/open.c:1422 [inline]
 __do_sys_openat fs/open.c:1438 [inline]
 __se_sys_openat fs/open.c:1433 [inline]
 __x64_sys_openat+0x143/0x1f0 fs/open.c:1433
 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: 0033:0x7fb11928c389
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:00007fb11a039168 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fb1193abf80 RCX: 00007fb11928c389
RDX: 0000000000103a42 RSI: 0000000020000380 RDI: ffffffffffffff9c
RBP: 00007fb1192d7493 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd0f87853f R14: 00007fb11a039300 R15: 0000000000022000
 </TASK>