New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Jump to bottom

Potential dereference of `nullptr` in libfuzzer harness? #489

Open

hawkinsw opened this issue May 25, 2024 · 0 comments

Collaborator

hawkinsw commented May 25, 2024 •

edited

Loading

ubpf/libfuzzer/libfuzz_harness.cc

Line 118 in 2868ce4

    
           if (ubpf_exec_ex(vm.get(), memory.data(), memory.size(), &interpreter_result, ubpf_stack.data(), ubpf_stack.size()) != 0) {

According to CPPReference:

If size() is 0, data() may or may not return a null pointer.

That could cause a problem here if there is ever a case where the fuzzer generates an empty input. Is this something that we want to protect?

Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment