47afd7ae65
If zero-length header happened in ramoops_write_kmsg_hdr(), that means we will not be able to read back dmesg record later, since it will be treated as invalid header in ramoops_pstore_read(). So we should not execute the following code but return the error. Signed-off-by: Yue Hu <huyue2@yulong.com> Signed-off-by: Kees Cook <keescook@chromium.org>
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 Restructured Text 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.