qweryzh

fuzz test occur runtime error

3

src/memory/shared_ptr.hpp:202:17: runtime error: downcast of address 0x000003638870 which does not point to an object of type 'Sass::PreValue' 0x000003638870: note: object is of type 'Sass::Unary_Expression' 00 00 00 00 48 ff...

I use libsass 3.6.4 to os-fuzz test and find a bug steps below: 1 build python3 infra/helper.py build_fuzzers --sanitizer address libsass 2 execute python3 infra/helper.py run_fuzzer libsass data_context_fuzzer -rss_limit_mb=0 errors...

we fuzz-test about latest 3.6.4 libsass and find a heap-buffer-overflow bug to be fixed： steps: 1、build python3 infra/helper.py build_fuzzers --sanitizer address libsass 2、run python3 infra/helper.py run_fuzzer libsass data_context_fuzzer -rss_limit_mb=0 error...