[PATCH 3.12 108/111] MIPS: KVM: Do not sign extend on unsigned MMIO load
From: Jiri Slaby <hidden>
Date: 2015-06-10 15:38:25
Also in:
kvm, lkml, stable
Subsystem:
kernel virtual machine for mips (kvm/mips), mips, the rest · Maintainers:
Huacai Chen, Thomas Bogendoerfer, Linus Torvalds
From: Nicholas Mc Guire <redacted> 3.12-stable review patch. If anyone has any objections, please let me know. =============== commit ed9244e6c534612d2b5ae47feab2f55a0d4b4ced upstream. 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 <redacted> Reviewed-by: James Hogan <redacted> Tested-by: James Hogan <redacted> 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 <redacted> Signed-off-by: Jiri Slaby <redacted> --- arch/mips/kvm/kvm_mips_emul.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/mips/kvm/kvm_mips_emul.c b/arch/mips/kvm/kvm_mips_emul.c
index e75ef8219caf..c76f297b7149 100644
--- a/arch/mips/kvm/kvm_mips_emul.c
+++ b/arch/mips/kvm/kvm_mips_emul.c@@ -1626,7 +1626,7 @@ kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run) 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:
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2.4.2