https://bugzilla.kernel.org/show_bug.cgi?id=60652
Bug ID: 60652
Summary: arch/x86/kvm/svm.c: svm_vcpu_reset() and uninitialized
dummy variable?
Product: Virtualization
Version: unspecified
Kernel Version: 3.11rc2
Hardware: All
OS: Linux
Tree: Mainline
Status: NEW
Severity: normal
Priority: P1
Component: kvm
Assignee: [email protected]
Reporter: [email protected]
Regression: No
Coverity CID 751495 feels a bit like a false positive. Is the dummy variable
not initialized on purpose?
1196static void svm_vcpu_reset(struct kvm_vcpu *vcpu)
1197{
1198 struct vcpu_svm *svm = to_svm(vcpu);
1. var_decl: Declaring variable "dummy" without initializer.
1199 u32 dummy;
1200 u32 eax = 1;
1201
1202 init_vmcb(svm);
1203
CID 751495 (#1 of 1): Uninitialized scalar variable (UNINIT)
2. uninit_use_in_call: Using uninitialized value "dummy" when calling
"kvm_cpuid(struct kvm_vcpu *, u32 *, u32 *, u32 *, u32 *)". [hide details]
1204 kvm_cpuid(vcpu, &eax, &dummy, &dummy, &dummy);
/arch/x86/kvm/cpuid.c
646void kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32
*edx)
647{
1. read_parm: Reading a parameter value.
648 u32 function = *eax, index = *ecx;
649 struct kvm_cpuid_entry2 *best;
650
651 best = kvm_find_cpuid_entry(vcpu, function, index);
652
653 if (!best)
654 best = check_cpuid_limit(vcpu, function, index);
655
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