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author | Sean Christopherson | 2022-06-01 11:01:58 -0700 |
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committer | Paolo Bonzini | 2022-06-11 11:48:09 -0400 |
commit | fcba483e82462830dd368951c0df03a95676f34d (patch) | |
tree | 88f966add9f26acf511e2288c22690fbf5b7f767 /samples/bpf | |
parent | 5321270b2362a85a74c3d52c00c3c6730a228f0c (diff) |
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 'samples/bpf')
0 files changed, 0 insertions, 0 deletions