This series adds a framework for coverage-guided fuzzing of virtual-devices. Fuzzing targets are based on qtest and can make use of the libqos abstractions.
V5: * misc fixes addressing V4 comments * cleanup in-process handlers/globals in libqtest.c * small fixes to fork-based fuzzing and support for multiple workers * changes to the virtio-net fuzzer to kick after each vq add V4: * add/transfer license headers to new files * restructure the added QTestClientTransportOps struct * restructure the FuzzTarget struct and fuzzer skeleton * fork-based fuzzer now directly mmaps shm over the coverage bitmaps * fixes to i440 and virtio-net fuzz targets * undo the changes to qtest_memwrite * possible to build /fuzz and /all in the same build-dir * misc fixes to address V3 comments V3: * rebased onto v4.1.0+ * add the fuzzer as a new build-target type in the build-system * add indirection to qtest client/server communication functions * remove ramfile and snapshot-based fuzzing support * add i440fx fuzz-target as a reference for developers. * add linker-script to assist with fork-based fuzzer V2: * split off changes to qos virtio-net and qtest server to other patches * move vl:main initialization into new func: qemu_init * moved useful functions from qos-test.c to a separate object * use struct of function pointers for add_fuzz_target(), instead of arguments * move ramfile to migration/qemu-file * rewrite fork-based fuzzer pending patch to libfuzzer * pass check-patch Alexander Bulekov (20): softmmu: split off vl.c:main() into main.c libqos: Rename i2c_send and i2c_recv fuzz: Add FUZZ_TARGET module type qtest: add qtest_server_send abstraction libqtest: Add a layer of abstraciton to send/recv module: check module wasn't already initialized qtest: add in-process incoming command handler tests: provide test variables to other targets libqos: split qos-test and libqos makefile vars libqos: move useful qos-test funcs to qos_external libqtest: make bufwrite rely on the TransportOps libqtest: add in-process qtest.c tx/rx handlers fuzz: add configure flag --enable-fuzzing fuzz: Add target/fuzz makefile rules fuzz: add fuzzer skeleton fuzz: add support for fork-based fuzzing. fuzz: add support for qos-assisted fuzz targets fuzz: add i440fx fuzz targets fuzz: add virtio-net fuzz target fuzz: add documentation to docs/devel/ Makefile | 16 ++- Makefile.objs | 4 + Makefile.target | 18 ++- configure | 39 ++++++ docs/devel/fuzzing.txt | 119 ++++++++++++++++++ exec.c | 12 +- include/qemu/module.h | 4 +- include/sysemu/qtest.h | 4 + include/sysemu/sysemu.h | 4 + main.c | 53 ++++++++ qtest.c | 31 ++++- tests/Makefile.include | 75 +++++------ tests/fuzz/Makefile.include | 11 ++ tests/fuzz/fork_fuzz.c | 55 +++++++++ tests/fuzz/fork_fuzz.h | 23 ++++ tests/fuzz/fork_fuzz.ld | 37 ++++++ tests/fuzz/fuzz.c | 179 +++++++++++++++++++++++++++ tests/fuzz/fuzz.h | 94 ++++++++++++++ tests/fuzz/i440fx_fuzz.c | 176 ++++++++++++++++++++++++++ tests/fuzz/qos_fuzz.c | 232 +++++++++++++++++++++++++++++++++++ tests/fuzz/qos_fuzz.h | 33 +++++ tests/fuzz/virtio_net_fuzz.c | 100 +++++++++++++++ tests/libqos/i2c.c | 10 +- tests/libqos/i2c.h | 4 +- tests/libqos/qos_external.c | 168 +++++++++++++++++++++++++ tests/libqos/qos_external.h | 28 +++++ tests/libqtest.c | 108 ++++++++++++++-- tests/libqtest.h | 4 + tests/pca9552-test.c | 10 +- tests/qos-test.c | 140 +-------------------- util/module.c | 7 ++ vl.c | 38 ++---- 32 files changed, 1607 insertions(+), 229 deletions(-) create mode 100644 docs/devel/fuzzing.txt create mode 100644 main.c create mode 100644 tests/fuzz/Makefile.include create mode 100644 tests/fuzz/fork_fuzz.c create mode 100644 tests/fuzz/fork_fuzz.h create mode 100644 tests/fuzz/fork_fuzz.ld create mode 100644 tests/fuzz/fuzz.c create mode 100644 tests/fuzz/fuzz.h create mode 100644 tests/fuzz/i440fx_fuzz.c create mode 100644 tests/fuzz/qos_fuzz.c create mode 100644 tests/fuzz/qos_fuzz.h create mode 100644 tests/fuzz/virtio_net_fuzz.c create mode 100644 tests/libqos/qos_external.c create mode 100644 tests/libqos/qos_external.h -- 2.23.0
