AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

KVM: nVMX: Truncate base/index GPR value on address calc in !64-bit

Browse Source 
commit 82277eeed65eed6c6ee5b8f97bd978763eab148f upstream.

Drop bits 63:32 of the base and/or index GPRs when calculating the
effective address of a VMX instruction memory operand.  Outside of 64-bit
mode, memory encodings are strictly limited to E*X and below.

Fixes: 064aea7747 ("KVM: nVMX: Decoding memory operands of VMX instructions")
Cc: stable@vger.kernel.org
Signed-off-by: Sean Christopherson <seanjc@google.com>
Message-Id: <20210422022128.3464144-7-seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Sean Christopherson 2021-04-21 19:21:25 -07:00 committed by Greg Kroah-Hartman
parent 6b7028de66
commit a947f95b6b
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/kvm/vmx/nested.c
View File

@ -4613,9 +4613,9 @@ int get_vmx_mem_address(struct kvm_vcpu *vcpu, unsigned long exit_qualification,
else if (addr_size == 0)
off = (gva_t)sign_extend64(off, 15);
if (base_is_valid)
off += kvm_register_read(vcpu, base_reg);
off += kvm_register_readl(vcpu, base_reg);
if (index_is_valid)
off += kvm_register_read(vcpu, index_reg) << scaling;
off += kvm_register_readl(vcpu, index_reg) << scaling;
vmx_get_segment(vcpu, &s, seg_reg);
/*