From: Uros Bizjak ubizjak@gmail.com
stable inclusion from stable-v5.10.133 commit 0ca2ba6e4d139da809061a25626174f812303b7a category: bugfix bugzilla: https://gitee.com/openeuler/kernel/issues/I5PTAS CVE: CVE-2022-29900,CVE-2022-23816,CVE-2022-29901
Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=...
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commit 6c44221b05236cc65d76cb5dc2463f738edff39d upstream.
Saves one byte in __vmx_vcpu_run for the same functionality.
Cc: Paolo Bonzini pbonzini@redhat.com Cc: Sean Christopherson sean.j.christopherson@intel.com Signed-off-by: Uros Bizjak ubizjak@gmail.com Message-Id: 20201029140457.126965-1-ubizjak@gmail.com Signed-off-by: Paolo Bonzini pbonzini@redhat.com Signed-off-by: Ben Hutchings ben@decadent.org.uk Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org Signed-off-by: Lin Yujun linyujun809@huawei.com Reviewed-by: Zhang Jianhua chris.zjh@huawei.com --- arch/x86/kvm/vmx/vmenter.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/arch/x86/kvm/vmx/vmenter.S b/arch/x86/kvm/vmx/vmenter.S index 90ad7a6246e3..e85aa5faa22d 100644 --- a/arch/x86/kvm/vmx/vmenter.S +++ b/arch/x86/kvm/vmx/vmenter.S @@ -132,7 +132,7 @@ SYM_FUNC_START(__vmx_vcpu_run) mov (%_ASM_SP), %_ASM_AX
/* Check if vmlaunch or vmresume is needed */ - cmpb $0, %bl + testb %bl, %bl
/* Load guest registers. Don't clobber flags. */ mov VCPU_RCX(%_ASM_AX), %_ASM_CX