linux-kernel - [PATCH 1/2] KVM: VMX: Drop unprotected-by-braces variable declaration in case-statement

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 15 Mar 2023 12:11:27 -0700
From:   Sean Christopherson <seanjc@...gle.com>
To:     Sean Christopherson <seanjc@...gle.com>,
        Paolo Bonzini <pbonzini@...hat.com>
Cc:     kvm@...r.kernel.org, linux-kernel@...r.kernel.org,
        Emanuele Giuseppe Esposito <eesposit@...hat.com>
Subject: [PATCH 1/2] KVM: VMX: Drop unprotected-by-braces variable declaration
 in case-statement

Remove the intermediate "guest_flush_l1d" boolean to fix a build error on
clang due to the variable being declared inside a case-statement without
curly braces to create a proper code block.

Fixes: c7ed946b95cb ("kvm: vmx: Add IA32_FLUSH_CMD guest support")
Reported-by: kernel test robot <lkp@...el.com>
Link: https://lore.kernel.org/oe-kbuild-all/202303151912.oZ6SGd90-lkp@intel.com
Cc: Emanuele Giuseppe Esposito <eesposit@...hat.com>
Signed-off-by: Sean Christopherson <seanjc@...gle.com>
---
 arch/x86/kvm/vmx/vmx.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/arch/x86/kvm/vmx/vmx.c b/arch/x86/kvm/vmx/vmx.c
index c63f6c786eb1..d7bf14abdba1 100644
--- a/arch/x86/kvm/vmx/vmx.c
+++ b/arch/x86/kvm/vmx/vmx.c
@@ -2325,10 +2325,8 @@ static int vmx_set_msr(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
 					   X86_FEATURE_IBPB);
 		break;
 	case MSR_IA32_FLUSH_CMD:
-		bool guest_flush_l1d = guest_cpuid_has(vcpu,
-						       X86_FEATURE_FLUSH_L1D);
 		ret = vmx_set_msr_ia32_cmd(vcpu, msr_info,
-					   guest_flush_l1d,
+					   guest_cpuid_has(vcpu, X86_FEATURE_FLUSH_L1D),
 					   L1D_FLUSH,
 					   X86_FEATURE_FLUSH_L1D);
 		break;
-- 
2.40.0.rc2.332.ga46443480c-goog