============================================
WARNING: possible recursive locking detected
syzkaller #0 Not tainted
--------------------------------------------
syz.6.30/5772 is trying to acquire lock:
ffff888118a3f298 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_truncate+0x5c7/0x770 fs/ext4/inode.c:4251

but task is already holding lock:
ffff888118a3d690 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0xa6f/0xf20 fs/ext4/inode.c:5560

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

       CPU0
       ----
  lock(&ei->i_data_sem/3);
  lock(&ei->i_data_sem/3);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

5 locks held by syz.6.30/5772:
 #0: ffff88810b1f1438 (sb_writers#4){.+.+}-{0:0}, at: vfs_truncate+0x70/0x240 fs/open.c:84
 #1: ffff888118a3d808 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
 #1: ffff888118a3d808 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: do_truncate+0xba/0x130 fs/open.c:63
 #2: ffff888118a3d998 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:832 [inline]
 #2: ffff888118a3d998 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0x55c/0xf20 fs/ext4/inode.c:5520
 #3: ffff888118a3d690 (&ei->i_data_sem/3){++++}-{3:3}, at: ext4_setattr+0xa6f/0xf20 fs/ext4/inode.c:5560
 #4: ffff888118a3d4e0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:162 [inline]
 #4: ffff888118a3d4e0 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5941 [inline]
 #4: ffff888118a3d4e0 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x240/0x370 fs/ext4/inode.c:6022

stack backtrace:
CPU: 0 PID: 5772 Comm: syz.6.30 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/02/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 print_deadlock_bug kernel/locking/lockdep.c:2946 [inline]
 check_deadlock kernel/locking/lockdep.c:2989 [inline]
 validate_chain kernel/locking/lockdep.c:3775 [inline]
 __lock_acquire.cold+0x130/0x2c5 kernel/locking/lockdep.c:5012
 lock_acquire kernel/locking/lockdep.c:5623 [inline]
 lock_acquire+0xbb/0x290 kernel/locking/lockdep.c:5588
 down_write+0x20/0xa0 kernel/locking/rwsem.c:1551
 ext4_truncate+0x5c7/0x770 fs/ext4/inode.c:4251
 ext4_evict_inode+0x52c/0xd80 fs/ext4/inode.c:289
 evict+0x177/0x390 fs/inode.c:647
 iput_final fs/inode.c:1769 [inline]
 iput.part.0+0x243/0x2f0 fs/inode.c:1795
 iput+0x3a/0x50 fs/inode.c:1785
 ext4_xattr_set_entry+0x51a/0x1a80 fs/ext4/xattr.c:1836
 ext4_xattr_ibody_set+0x7f/0x110 fs/ext4/xattr.c:2253
 ext4_xattr_move_to_block fs/ext4/xattr.c:2640 [inline]
 ext4_xattr_make_inode_space fs/ext4/xattr.c:2708 [inline]
 ext4_expand_extra_isize_ea+0x8d8/0xdb0 fs/ext4/xattr.c:2800
 __ext4_expand_extra_isize+0x18b/0x200 fs/ext4/inode.c:5901
 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5944 [inline]
 __ext4_mark_inode_dirty+0x28c/0x370 fs/ext4/inode.c:6022
 ext4_setattr+0xa9f/0xf20 fs/ext4/inode.c:5563
 notify_change+0x6ef/0x9e0 fs/attr.c:505
 do_truncate+0xca/0x130 fs/open.c:65
 vfs_truncate+0x209/0x240 fs/open.c:111
 do_sys_truncate.part.0+0xc8/0xe0 fs/open.c:134
 do_sys_truncate fs/open.c:128 [inline]
 __do_sys_truncate fs/open.c:146 [inline]
 __se_sys_truncate fs/open.c:144 [inline]
 __x64_sys_truncate+0x33/0x50 fs/open.c:144
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x33/0x80 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fb98c266ba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb98c0d7038 EFLAGS: 00000246 ORIG_RAX: 000000000000004c
RAX: ffffffffffffffda RBX: 00007fb98c4adfa0 RCX: 00007fb98c266ba9
RDX: 0000000000000000 RSI: 0000000000000004 RDI: 00002000000000c0
RBP: 00007fb98c2e9e19 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb98c4ae038 R14: 00007fb98c4adfa0 R15: 00007ffdeb751aa8
 </TASK>