KVM: x86: Protect ioapic_read_indirect() from Spectre-v1/L1TF attacks

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This fixes a Spectre-v1/L1TF vulnerability in ioapic_read_indirect().
This function contains index computations based on the
(attacker-controlled) IOREGSEL register.

Fixes: a2c118bfab ("KVM: Fix bounds checking in ioapic indirect register reads (CVE-2013-1798)")

Signed-off-by: Nick Finco <nifi@google.com>
Signed-off-by: Marios Pomonis <pomonis@google.com>
Reviewed-by: Andrew Honig <ahonig@google.com>
Cc: stable@vger.kernel.org
Reviewed-by: Jim Mattson <jmattson@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

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Marios Pomonis 2019-12-11 12:47:44 -08:00 • committed by Paolo Bonzini

parent 14e32321f3

commit 8c86405f60

1 changed files with 8 additions and 6 deletions

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arch/x86/kvm/ioapic.c

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