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abstractFS

An high-performance in-memory file system for fuzzing

Prerequisite

Build funchook:

/path/to/install/directory could be the path to abstractFS.

$ git clone --recursive https://github.com/kubo/funchook.git
$ mkdir build
$ cd build
$ cmake -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=/tmp/ ../funchook
$ make
$ make install

Build

$ cd /tmp/
$ git clone https://github.com/emptyiscolor/abstractFS
$ cd abstractFS
$ mkdir build
$ cd build
$ cmake ..
$ make

$ cp -f fs_hook.so /tmp/

Usage

Assume that xxxx_fuzzer is compiled by afl.

Single test case

FS_AFL_SHM_ID=4919 TESTFILE=/tmp/afl_input /out/xxxx_fuzzer /tmp/afl_input

Enable FS runtime for AFL.

FS_AFL_SHM_ID=6789 ASAN_OPTIONS="symbolize=0:abort_on_error=1" ./afl-fuzz -i seeds -o findings -f /tmp/afl_input -t 100+ -m none -- ./xxxx_fuzzer @@