diff options
author | Sean Christopherson <seanjc@google.com> | 2022-06-01 21:01:58 +0300 |
---|---|---|
committer | Paolo Bonzini <pbonzini@redhat.com> | 2022-06-11 18:48:09 +0300 |
commit | fcba483e82462830dd368951c0df03a95676f34d (patch) | |
tree | 88f966add9f26acf511e2288c22690fbf5b7f767 /tools/testing/selftests/kvm/lib/aarch64/processor.c | |
parent | 5321270b2362a85a74c3d52c00c3c6730a228f0c (diff) | |
download | linux-fcba483e82462830dd368951c0df03a95676f34d.tar.xz |
KVM: selftests: Sanity check input to ioctls() at build time
Add a static assert to the KVM/VM/vCPU ioctl() helpers to verify that the
size of the argument provided matches the expected size of the IOCTL.
Because ioctl() ultimately takes a "void *", it's all too easy to pass in
garbage and not detect the error until runtime. E.g. while working on a
CPUID rework, selftests happily compiled when vcpu_set_cpuid()
unintentionally passed the cpuid() function as the parameter to ioctl()
(a local "cpuid" parameter was removed, but its use was not replaced with
"vcpu->cpuid" as intended).
Tweak a variety of benign issues that aren't compatible with the sanity
check, e.g. passing a non-pointer for ioctls().
Note, static_assert() requires a string on older versions of GCC. Feed
it an empty string to make the compiler happy.
Signed-off-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'tools/testing/selftests/kvm/lib/aarch64/processor.c')
-rw-r--r-- | tools/testing/selftests/kvm/lib/aarch64/processor.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/kvm/lib/aarch64/processor.c b/tools/testing/selftests/kvm/lib/aarch64/processor.c index 6bd27782f00c..6f5551368944 100644 --- a/tools/testing/selftests/kvm/lib/aarch64/processor.c +++ b/tools/testing/selftests/kvm/lib/aarch64/processor.c @@ -472,7 +472,7 @@ void aarch64_get_supported_page_sizes(uint32_t ipa, }; kvm_fd = open_kvm_dev_path_or_exit(); - vm_fd = __kvm_ioctl(kvm_fd, KVM_CREATE_VM, ipa); + vm_fd = __kvm_ioctl(kvm_fd, KVM_CREATE_VM, (void *)(unsigned long)ipa); TEST_ASSERT(vm_fd >= 0, KVM_IOCTL_ERROR(KVM_CREATE_VM, vm_fd)); vcpu_fd = ioctl(vm_fd, KVM_CREATE_VCPU, 0); |