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| author | Denis Efremov <efremov@linux.com> | 2020-06-03 13:11:31 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-06-04 14:41:05 -0400 |
| commit | 7ec28e264f2e52089c14c6f8eba1ce7b6501e59b (patch) | |
| tree | f258335eb06355778e8f4817a431cfe5a42f5d34 /arch/x86/kvm/cpuid.c | |
| parent | 0e96edd9a9c2e75ece7f581d4f75d26b38cd53ba (diff) | |
| download | linux-7ec28e264f2e52089c14c6f8eba1ce7b6501e59b.tar.bz2 | |
KVM: Use vmemdup_user()
Replace opencoded alloc and copy with vmemdup_user().
Signed-off-by: Denis Efremov <efremov@linux.com>
Message-Id: <20200603101131.2107303-1-efremov@linux.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 | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 9ca32d969938..8a294f9747aa 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -181,17 +181,14 @@ int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, r = -E2BIG; if (cpuid->nent > KVM_MAX_CPUID_ENTRIES) goto out; - r = -ENOMEM; if (cpuid->nent) { - cpuid_entries = - vmalloc(array_size(sizeof(struct kvm_cpuid_entry), - cpuid->nent)); - if (!cpuid_entries) - goto out; - r = -EFAULT; - if (copy_from_user(cpuid_entries, entries, - cpuid->nent * sizeof(struct kvm_cpuid_entry))) + cpuid_entries = vmemdup_user(entries, + array_size(sizeof(struct kvm_cpuid_entry), + cpuid->nent)); + if (IS_ERR(cpuid_entries)) { + r = PTR_ERR(cpuid_entries); goto out; + } } for (i = 0; i < cpuid->nent; i++) { vcpu->arch.cpuid_entries[i].function = cpuid_entries[i].function; @@ -211,8 +208,8 @@ int kvm_vcpu_ioctl_set_cpuid(struct kvm_vcpu *vcpu, kvm_x86_ops.cpuid_update(vcpu); r = kvm_update_cpuid(vcpu); + kvfree(cpuid_entries); out: - vfree(cpuid_entries); return r; } |