REISERFS (device loop7): Remounting filesystem read-only
REISERFS error (device loop7): vs-13080 reiserfs_new_directory: i/o failure occurred creating new directory
============================================
WARNING: possible recursive locking detected
5.15.185-syzkaller #0 Not tainted
--------------------------------------------
syz.7.639/8666 is trying to acquire lock:
ffff8880606f6640 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
ffff8880606f6640 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: open_xa_root fs/reiserfs/xattr.c:127 [inline]
ffff8880606f6640 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: open_xa_dir+0x11d/0x6b0 fs/reiserfs/xattr.c:152

but task is already holding lock:
ffff8880606f7380 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
ffff8880606f7380 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: open_xa_dir+0x421/0x6b0 fs/reiserfs/xattr.c:160

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

       CPU0
       ----
  lock(&type->i_mutex_dir_key#8/3);
  lock(&type->i_mutex_dir_key#8/3);

 *** DEADLOCK ***

 May be due to missing lock nesting notation

4 locks held by syz.7.639/8666:
 #0: ffff888026970460 (sb_writers#14){.+.+}-{0:0}, at: mnt_want_write+0x3d/0x90 fs/namespace.c:377
 #1: ffff88806061ece0 (&sb->s_type->i_mutex_key#22){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:787 [inline]
 #1: ffff88806061ece0 (&sb->s_type->i_mutex_key#22){+.+.}-{3:3}, at: vfs_setxattr+0x141/0x2f0 fs/xattr.c:302
 #2: ffff8880606f7380 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:822 [inline]
 #2: ffff8880606f7380 (&type->i_mutex_dir_key#8/3){+.+.}-{3:3}, at: open_xa_dir+0x421/0x6b0 fs/reiserfs/xattr.c:160
 #3: ffff88807bbea090 (&sbi->lock){+.+.}-{3:3}, at: reiserfs_write_lock_nested+0x5c/0xd0 fs/reiserfs/lock.c:78

stack backtrace:
CPU: 0 PID: 8666 Comm: syz.7.639 Not tainted 5.15.185-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
Call Trace:
 <TASK>
 dump_stack_lvl+0x168/0x230 lib/dump_stack.c:106
 __lock_acquire+0x1227/0x7c60 kernel/locking/lockdep.c:-1
 lock_acquire+0x197/0x3f0 kernel/locking/lockdep.c:5623
 down_write_nested+0x3b/0x60 kernel/locking/rwsem.c:1667
 inode_lock_nested include/linux/fs.h:822 [inline]
 open_xa_root fs/reiserfs/xattr.c:127 [inline]
 open_xa_dir+0x11d/0x6b0 fs/reiserfs/xattr.c:152
 reiserfs_for_each_xattr+0x174/0x7b0 fs/reiserfs/xattr.c:252
 reiserfs_delete_xattrs+0x1c/0x80 fs/reiserfs/xattr.c:364
 reiserfs_evict_inode+0x221/0x490 fs/reiserfs/inode.c:53
 evict+0x485/0x870 fs/inode.c:647
 reiserfs_new_inode+0x5c8/0x1860 fs/reiserfs/inode.c:2164
 reiserfs_mkdir+0x557/0x970 fs/reiserfs/namei.c:845
 xattr_mkdir fs/reiserfs/xattr.c:76 [inline]
 open_xa_dir+0x5af/0x6b0 fs/reiserfs/xattr.c:167
 xattr_lookup+0x22/0x2a0 fs/reiserfs/xattr.c:395
 reiserfs_xattr_set_handle+0xf4/0xf20 fs/reiserfs/xattr.c:540
 reiserfs_xattr_set+0x435/0x550 fs/reiserfs/xattr.c:640
 __vfs_setxattr+0x3e0/0x420 fs/xattr.c:182
 __vfs_setxattr_noperm+0x129/0x5e0 fs/xattr.c:216
 vfs_setxattr+0x168/0x2f0 fs/xattr.c:303
 do_setxattr fs/xattr.c:588 [inline]
 setxattr+0x2da/0x300 fs/xattr.c:611
 path_setxattr+0x142/0x280 fs/xattr.c:630
 __do_sys_lsetxattr fs/xattr.c:653 [inline]
 __se_sys_lsetxattr fs/xattr.c:649 [inline]
 __x64_sys_lsetxattr+0xb4/0xd0 fs/xattr.c:649
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7fe63e24c929
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:00007fe63c072038 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd
RAX: ffffffffffffffda RBX: 00007fe63e474160 RCX: 00007fe63e24c929
RDX: 0000200000000400 RSI: 00002000000000c0 RDI: 0000200000000080
RBP: 00007fe63e2ceb39 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000104 R11: 0000000000000246 R12: 0000000000000000
R13: 0000000000000001 R14: 00007fe63e474160 R15: 00007fffdd5c7928
 </TASK>