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17 May 2024, 11:00:25 UTC
Revision 7a7003b1da010d2b0d1dc8bf21c10f5c73b389f1 authored by Mark Rutland on 02 November 2017, 16:12:03 UTC, committed by Catalin Marinas on 02 November 2017, 18:33:08 UTC 
arm64: ensure __dump_instr() checks addr_limit
 
It's possible for a user to deliberately trigger __dump_instr with a
chosen kernel address.

Let's avoid problems resulting from this by using get_user() rather than
__get_user(), ensuring that we don't erroneously access kernel memory.

Where we use __dump_instr() on kernel text, we already switch to
KERNEL_DS, so this shouldn't adversely affect those cases.

Fixes: 60ffc30d5652810d ("arm64: Exception handling")
Cc: stable@vger.kernel.org
Acked-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
1 parent 0b07194
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Tip revision: 7a7003b1da010d2b0d1dc8bf21c10f5c73b389f1 authored by Mark Rutland on 02 November 2017, 16:12:03 UTC
arm64: ensure __dump_instr() checks addr_limit
Tip revision: 7a7003b
README 
Linux kernel
============

This file was moved to Documentation/admin-guide/README.rst

Please notice that there are several guides for kernel developers and users.
These guides can be rendered in a number of formats, like HTML and PDF.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.

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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