diff options
| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2020-03-25 12:12:59 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-03-31 10:51:45 -0400 |
| commit | 855c7e9b9c2c39fb8d108ac70d0eed530f80a2aa (patch) | |
| tree | 1b3419b6d27fe9f655ad6856713268b56d2e0f58 /arch/x86/kvm/cpuid.c | |
| parent | 842f4be95899df22b5843ba1a7c8cf37e831a6e8 (diff) | |
KVM: x86: Fix BUILD_BUG() in __cpuid_entry_get_reg() w/ CONFIG_UBSAN=y
Take the target reg in __cpuid_entry_get_reg() instead of a pointer to a
struct cpuid_reg. When building with -fsanitize=alignment (enabled by
CONFIG_UBSAN=y), some versions of gcc get tripped up on the pointer and
trigger the BUILD_BUG().
Reported-by: Randy Dunlap <rdunlap@infradead.org>
Fixes: d8577a4c238f8 ("KVM: x86: Do host CPUID at load time to mask KVM cpu caps")
Fixes: 4c61534aaae2a ("KVM: x86: Introduce cpuid_entry_{get,has}() accessors")
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Message-Id: <20200325191259.23559-1-sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/cpuid.c')
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index b18c31a26cc2..901cd1fdecd9 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -269,7 +269,7 @@ static __always_inline void kvm_cpu_cap_mask(enum cpuid_leafs leaf, u32 mask) cpuid_count(cpuid.function, cpuid.index, &entry.eax, &entry.ebx, &entry.ecx, &entry.edx); - kvm_cpu_caps[leaf] &= *__cpuid_entry_get_reg(&entry, &cpuid); + kvm_cpu_caps[leaf] &= *__cpuid_entry_get_reg(&entry, cpuid.reg); } void kvm_set_cpu_caps(void) |