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ff35592644Syzbot reported a WARNING in ntfs_extend_initialized_size. The data type of in->i_valid and to is u64 in ntfs_file_mmap(). If their values are greater than LLONG_MAX, overflow will occur because the data types of the parameters valid and new_valid corresponding to the function ntfs_extend_initialized_size() are loff_t. Before calling ntfs_extend_initialized_size() in the ntfs_file_mmap(), the "ni->i_valid < to" has been determined, so the same WARN_ON determination is not required in ntfs_extend_initialized_size(). Just execute the ntfs_extend_initialized_size() in ntfs_extend() to make a WARN_ON check. Reported-and-tested-by: syzbot+e37dd1dfc814b10caa55@syzkaller.appspotmail.com Closes: https://syzkaller.appspot.com/bug?extid=e37dd1dfc814b10caa55 Signed-off-by: Edward Adam Davis <eadavis@qq.com> Signed-off-by: Konstantin Komarov <almaz.alexandrovich@paragon-software.com> |
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Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.