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bh=qauMgQVPtCANJT4Nt7LxsGLPSOqkbefylp3+uMX4ihU=; b=gCAV/CiRdlkx7iXXgdkWd3VAwOS398PiX4xG5TeHfQodVQ8E2zshnKTl7rJhQNJvFIAxnx lhszB7ZuWBkUyjtCpckHO/RR2h1MhhoMt5sXi7GL01ym6TI+zOrFggfZeutXwlRaoKlBcF qoHdrtMsLFb1Hpw5HAC1NSa9Q6QRMUc= X-MC-Unique: bf6bpCfvPfu8_lUqwAZ44g-1 From: Thomas Huth To: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , qemu-devel@nongnu.org Cc: qemu-trivial@nongnu.org, Akihiko Odaki Subject: [PATCH] io/channel-socket: Fix -fsanitize=undefined problem with latest Clang Date: Wed, 29 May 2024 15:31:06 +0200 Message-ID: <20240529133106.1224866-1-thuth@redhat.com> MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.11.54.9 Received-SPF: pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) client-ip=209.51.188.17; envelope-from=qemu-devel-bounces+importer=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=thuth@redhat.com; helo=us-smtp-delivery-124.mimecast.com 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=-0.036, 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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=unavailable autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1716989528258100001 Content-Type: text/plain; charset="utf-8" Casting function pointers from one type to another causes undefined behavior errors when compiling with -fsanitize=3Dundefined with Clang v18: $ QTEST_QEMU_BINARY=3D./qemu-system-mips64 tests/qtest/netdev-socket TAP version 13 # random seed: R02S4424f4f460de783fdd3d72c5571d3adc 1..10 # Start of mips64 tests # Start of netdev tests # Start of stream tests # starting QEMU: exec ./qemu-system-mips64 -qtest unix:/tmp/qtest-1213196.= sock -qtest-log /dev/null -chardev socket,path=3D/tmp/qtest-1213196.qmp,id= =3Dchar0 -mon chardev=3Dchar0,mode=3Dcontrol -display none -audio none -nod= efaults -M none -netdev stream,id=3Dst0,addr.type=3Dfd,addr.str=3D3 -accel = qtest ../io/task.c:78:13: runtime error: call to function qapi_free_SocketAddres= s through pointer to incorrect function type 'void (*)(void *)' /tmp/qemu-sanitize/qapi/qapi-types-sockets.c:170: note: qapi_free_SocketAd= dress defined here SUMMARY: UndefinedBehaviorSanitizer: undefined-behavior ../io/task.c:78:13 Add a wrapper function to avoid the problem. Signed-off-by: Thomas Huth Reviewed-by: Peter Maydell Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- io/channel-socket.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/io/channel-socket.c b/io/channel-socket.c index 3a899b0608..aa2a1c8586 100644 --- a/io/channel-socket.c +++ b/io/channel-socket.c @@ -193,6 +193,10 @@ static void qio_channel_socket_connect_worker(QIOTask = *task, qio_task_set_error(task, err); } =20 +static void qio_qapi_free_SocketAddress(gpointer sa) +{ + qapi_free_SocketAddress(sa); +} =20 void qio_channel_socket_connect_async(QIOChannelSocket *ioc, SocketAddress *addr, @@ -213,7 +217,7 @@ void qio_channel_socket_connect_async(QIOChannelSocket = *ioc, qio_task_run_in_thread(task, qio_channel_socket_connect_worker, addrCopy, - (GDestroyNotify)qapi_free_SocketAddress, + qio_qapi_free_SocketAddress, context); } =20 --=20 2.45.1