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    udf: Fix data corruption for files in ICB · 9c2fc0de
    Jan Kara 提交于
    When a file is stored in ICB (inode), we overwrite part of the file, and
    the page containing file's data is not in page cache, we end up corrupting
    file's data by overwriting them with zeros. The problem is we use
    simple_write_begin() which simply zeroes parts of the page which are not
    written to. The problem has been introduced by be021ee4 (udf: convert to
    new aops).
    
    Fix the problem by providing a ->write_begin function which makes the page
    properly uptodate.
    
    CC: <stable@vger.kernel.org> # >= 2.6.24
    Reported-by: NIan Abbott <abbotti@mev.co.uk>
    Signed-off-by: NJan Kara <jack@suse.cz>
    9c2fc0de
file.c 6.7 KB