linux-ext4 - [bug report] ext4, project: expand inode extra size if possible

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Message-ID: <20191202094103.rgqihwzoxxy676fj@kili.mountain>
Date:   Mon, 2 Dec 2019 12:41:04 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     miaoxie@...wei.com
Cc:     linux-ext4@...r.kernel.org
Subject: [bug report] ext4, project: expand inode extra size if possible

Hello Miao Xie,

The patch c03b45b853f5: "ext4, project: expand inode extra size if
possible" from Aug 6, 2017, leads to the following static checker
warning:

    fs/ext4/inode.c:5708 ext4_expand_extra_isize()
    warn: inconsistent returns 'EXT4_I(inode)->xattr_sem'.
      Locked on  : 5708
      Unlocked on: 5708

fs/ext4/inode.c
  5681          handle = ext4_journal_start(inode, EXT4_HT_INODE,
  5682                                      EXT4_DATA_TRANS_BLOCKS(inode->i_sb));
  5683          if (IS_ERR(handle)) {
  5684                  error = PTR_ERR(handle);
  5685                  brelse(iloc->bh);
  5686                  return error;
  5687          }
  5688  
  5689          ext4_write_lock_xattr(inode, &no_expand);
  5690  
  5691          BUFFER_TRACE(iloc->bh, "get_write_access");
  5692          error = ext4_journal_get_write_access(handle, iloc->bh);
  5693          if (error) {
  5694                  brelse(iloc->bh);
  5695                  goto out_stop;

Shouldn't this goto the ext4_write_unlock_xattr()?

  5696          }
  5697  
  5698          error = __ext4_expand_extra_isize(inode, new_extra_isize, iloc,
  5699                                            handle, &no_expand);
  5700  
  5701          rc = ext4_mark_iloc_dirty(handle, inode, iloc);
  5702          if (!error)
  5703                  error = rc;
  5704  
  5705          ext4_write_unlock_xattr(inode, &no_expand);
  5706  out_stop:
  5707          ext4_journal_stop(handle);
  5708          return error;
  5709  }


regards,
dan carpenter