Marios Pomonis c926f2f723 KVM: x86: Protect exit_reason from being used in Spectre-v1/L1TF attacks
This fixes a Spectre-v1/L1TF vulnerability in vmx_handle_exit().
While exit_reason is set by the hardware and therefore should not be
attacker-influenced, an unknown exit_reason could potentially be used to
perform such an attack.

Fixes: 55d2375e58a6 ("KVM: nVMX: Move nested code to dedicated files")

Signed-off-by: Marios Pomonis <pomonis@google.com>
Signed-off-by: Nick Finco <nifi@google.com>
Suggested-by: Sean Christopherson <sean.j.christopherson@intel.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
2020-01-27 19:59:42 +01:00
2019-12-18 17:17:36 -08:00
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2020-01-02 16:15:33 -08:00
2019-12-09 10:36:44 -08:00
2020-01-03 11:21:25 -08:00
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2020-01-03 11:10:31 -08:00
2019-10-29 04:43:29 -06:00
2020-01-05 11:15:31 -08:00
2020-01-05 14:23:27 -08:00

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.
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