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[88.21.202.17]) by smtp.gmail.com with ESMTPSA id y10sm4529626wrd.95.2020.05.14.07.34.33 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 14 May 2020 07:34:34 -0700 (PDT) From: =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= To: qemu-devel@nongnu.org Subject: [PATCH 0/6] tests/fuzz: Review notes Date: Thu, 14 May 2020 16:34:27 +0200 Message-Id: <20200514143433.18569-1-philmd@redhat.com> X-Mailer: git-send-email 2.21.3 MIME-Version: 1.0 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Content-Type: text/plain; charset=UTF-8; text/plain; charset="utf-8" Content-Transfer-Encoding: 8bit Received-SPF: pass client-ip=207.211.31.120; envelope-from=philmd@redhat.com; helo=us-smtp-1.mimecast.com X-detected-operating-system: by eggs.gnu.org: First seen = 2020/05/13 22:25:46 X-ACL-Warn: Detected OS = Linux 2.2.x-3.x [generic] [fuzzy] X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H2=-0.001, SPF_PASS=-0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Laurent Vivier , Thomas Huth , Alexander Bulekov , Bandan Das , Stefan Hajnoczi , Paolo Bonzini , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" I took some code notes while testing Alex's toy. Sending them as patches. Alex, I had theses issues while building following docs/devel/fuzzing.txt: CC nbd/server.o nbd/server.c:1937:1: error: unused function 'glib_listautoptr_cleanup_NBDExtentArray' [-Werror,-Wunused-function] G_DEFINE_AUTOPTR_CLEANUP_FUNC(NBDExtentArray, nbd_extent_array_free); ^ /usr/include/glib-2.0/glib/gmacros.h:462:22: note: expanded from macro 'G_DEFINE_AUTOPTR_CLEANUP_FUNC' static inline void _GLIB_AUTOPTR_LIST_FUNC_NAME(TypeName) (GList **_l) { g_list_free_full (*_l, (GDestroyNotify) func); } \ ^ /usr/include/glib-2.0/glib/gmacros.h:443:48: note: expanded from macro '_GLIB_AUTOPTR_LIST_FUNC_NAME' #define _GLIB_AUTOPTR_LIST_FUNC_NAME(TypeName) glib_listautoptr_cleanup_##TypeName ^ Solved by using './configure ... --extra-cflags=-Wno-unused-function' LINK i386-softmmu/qemu-fuzz-i386 /usr/lib64/clang/9.0.1/lib/linux/libclang_rt.asan-aarch64.a(asan_interceptors_vfork.S.o): warning: common of `__interception::real_vfork' overridden by definition /usr/lib64/clang/9.0.1/lib/linux/libclang_rt.asan-aarch64.a(asan_interceptors.cc.o): warning: defined here I simply ignore this warning. Alex, could you provide few more examples (in particular about instantiating devices, or useful libfuzzer arguments)? Also, I suppose you are using a script to generate the bug reports: I can reproduce it in qemu 5.0 using: cat << EOF | qemu-system ... outl 0xcf8 ... outl 0xcfc ... ... EOF Is this script available in the QEMU repository? I couldn't find it. Regards, Phil. Philippe Mathieu-Daudé (6): tests/fuzz/Makefile: Do not link code using unavailable devices Makefile: List fuzz targets in 'make help' tests/fuzz: Add missing space in test description tests/fuzz: Remove unuseful/unused typedefs tests/fuzz: Extract pciconfig_fuzz_qos() method tests/fuzz: Extract ioport_fuzz_qtest() method Makefile | 6 +++- tests/qtest/fuzz/i440fx_fuzz.c | 47 ++++++++++++++++++++----------- tests/qtest/fuzz/Makefile.include | 6 ++-- 3 files changed, 38 insertions(+), 21 deletions(-) -- 2.21.3