Messages in this thread Patch in this message | | | From | James Hogan <> | Subject | [PATCH stable <3.17] MIPS: KVM: Do not sign extend on unsigned MMIO load | Date | Wed, 8 Jul 2015 15:25:07 +0100 |
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From: Nicholas Mc Guire <hofrat@osadl.org>
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 <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> Cc: <stable@vger.kernel.org> # v3.10+ Signed-off-by: James Hogan <james.hogan@imgtec.com> --- This is a trivial backport (i.e. git cherry-pick, git format-patch) for stable branches before v3.17, due to the commit d7d5b05faf16 ("MIPS: KVM: Rename files to remove the prefix "kvm_" and "kvm_mips_"") which renamed a bunch of files including this one. --- 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: -- 2.3.6
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