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23 October 2021, 00:29:24 UTC
Revision 1b3a62643660020cdc68e6139a010c06e8fc96c7 authored by Kirill A. Shutemov on 01 August 2018, 13:32:25 UTC, committed by Thomas Gleixner on 02 August 2018, 12:22:22 UTC 
x86/boot/compressed/64: Validate trampoline placement against E820
 
There were two report of boot failure cased by trampoline placed into
a reserved memory region. It can happen on machines that don't report
EBDA correctly.

Fix the problem by re-validating the found address against the E820 table.
If the address is in a reserved area, find the next usable region below the
initial address.

Fixes: 3548e131ec6a ("x86/boot/compressed/64: Find a place for 32-bit trampoline")
Reported-by: Dmitry Malkin <d.malkin@real-time-systems.com>
Reported-by: youling 257 <youling257@gmail.com>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Link: https://lkml.kernel.org/r/20180801133225.38121-1-kirill.shutemov@linux.intel.com
1 parent 6b47037
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Tip revision: 1b3a62643660020cdc68e6139a010c06e8fc96c7 authored by Kirill A. Shutemov on 01 August 2018, 13:32:25 UTC
x86/boot/compressed/64: Validate trampoline placement against E820
Tip revision: 1b3a626
README 
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.
See Documentation/00-INDEX for a list of what is contained in each file.

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.
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