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MIPS: KVM: Do not sign extend on unsigned MMIO load

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Fix possible unintended sign extension in unsigned MMIO loads by casting
to uint16_t in the case of mmio_needed != 2.

Signed-off-by: Nicholas Mc Guire <hofrat@osadl.org>
Reviewed-by: James Hogan <james.hogan@imgtec.com>
Tested-by: James Hogan <james.hogan@imgtec.com>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/9985/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
Nicholas Mc Guire 2015-05-07 14:47:50 +02:00 committed by Ralf Baechle
parent 8833bc308b
commit ed9244e6c5
1 changed files with 1 additions and 1 deletions
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2
arch/mips/kvm/emulate.c
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@ -2409,7 +2409,7 @@ enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu,
if (vcpu->mmio_needed == 2)
*gpr = *(int16_t *) run->mmio.data;
else
*gpr = *(int16_t *) run->mmio.data;
*gpr = *(uint16_t *)run->mmio.data;
break;
case 1: