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c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1772732902; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=3x5dOLupVL+hjV4GsiegMaAvA6L4zY0/YDT1LJKlaPI=; b=SJvw+tfS/EaxEfVm7447Apx8CkrtR/NmWMfx2ALnUsyt8Wlgj82RADO7rQ7X/VIgEUsn4k YaCddjo+PnVaLVUYWxutKMRZkdkZidj+HvSxFrz6Oeo5LEXcapQeKacdsedMsgc1nu/QkU tyWuj9YxlC2HPdLzGkOIpHIOt9+e4qI= X-MC-Unique: zITTJGrlNCeK5O6pU7sUSg-1 X-Mimecast-MFC-AGG-ID: zITTJGrlNCeK5O6pU7sUSg_1772732895 From: =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= To: qemu-devel@nongnu.org Cc: Markus Armbruster , Richard Henderson , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , devel@lists.libvirt.org, qemu-rust@nongnu.org, "Dr. David Alan Gilbert" , Gerd Hoffmann , Christian Schoenebeck , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Manos Pitsidianakis , Eduardo Habkost , Pierrick Bouvier , Paolo Bonzini , Stefan Weil Subject: [PULL 04/27] io: fix cleanup for websock I/O source data on cancellation Date: Thu, 5 Mar 2026 17:47:20 +0000 Message-ID: <20260305174743.3084606-5-berrange@redhat.com> In-Reply-To: <20260305174743.3084606-1-berrange@redhat.com> References: <20260305174743.3084606-1-berrange@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 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=170.10.129.124; envelope-from=berrange@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -5 X-Spam_score: -0.6 X-Spam_bar: / X-Spam_report: (-0.6 / 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_H4=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.892, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.622, SPF_HELO_PASS=-0.001, SPF_PASS=-0.001 autolearn=no autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: qemu development 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: 1772733191695154100 The websock code will create a GSource for tracking completion of the handshake process, passing a QIOTask which is freed by the callback when it completes, which means when a source is cancelled, nothing is free'ing the task. Switch to provide a data free callback to the GSource, which ensures the QIOTask is always freed even when the main event callback never fires. Fixes: https://gitlab.com/qemu-project/qemu/-/issues/3114 Signed-off-by: Daniel P. Berrang=C3=A9 --- io/channel-websock.c | 49 +++++++++++++++++++++++++++++++------------- 1 file changed, 35 insertions(+), 14 deletions(-) diff --git a/io/channel-websock.c b/io/channel-websock.c index 100faba6b3..9902b014f7 100644 --- a/io/channel-websock.c +++ b/io/channel-websock.c @@ -526,11 +526,32 @@ static int qio_channel_websock_handshake_read(QIOChan= nelWebsock *ioc, return 1; } =20 +typedef struct QIOChannelWebsockData { + QIOTask *task; +} QIOChannelWebsockData; + +static void qio_channel_websock_data_free(gpointer user_data) +{ + QIOChannelWebsockData *data =3D user_data; + /* + * Usually 'task' will be NULL since the GSource + * callback will either complete the task or pass + * it on to a new GSource. We'll see a non-NULL + * task here only if the GSource was released before + * its callback triggers + */ + if (data->task) { + qio_task_free(data->task); + } + g_free(data); +} + static gboolean qio_channel_websock_handshake_send(QIOChannel *ioc, GIOCondition condition, gpointer user_data) { - QIOTask *task =3D user_data; + QIOChannelWebsockData *data =3D user_data; + QIOTask *task =3D data->task; QIOChannelWebsock *wioc =3D QIO_CHANNEL_WEBSOCK( qio_task_get_source(task)); Error *err =3D NULL; @@ -545,7 +566,6 @@ static gboolean qio_channel_websock_handshake_send(QIOC= hannel *ioc, trace_qio_channel_websock_handshake_fail(ioc, error_get_pretty(err= )); qio_task_set_error(task, err); qio_task_complete(task); - qio_task_free(task); wioc->hs_io_tag =3D 0; return FALSE; } @@ -562,7 +582,6 @@ static gboolean qio_channel_websock_handshake_send(QIOC= hannel *ioc, trace_qio_channel_websock_handshake_complete(ioc); qio_task_complete(task); } - qio_task_free(task); wioc->hs_io_tag =3D 0; return FALSE; } @@ -574,7 +593,8 @@ static gboolean qio_channel_websock_handshake_io(QIOCha= nnel *ioc, GIOCondition condition, gpointer user_data) { - QIOTask *task =3D user_data; + QIOChannelWebsockData *data =3D user_data, *newdata =3D NULL; + QIOTask *task =3D data->task; QIOChannelWebsock *wioc =3D QIO_CHANNEL_WEBSOCK( qio_task_get_source(task)); Error *err =3D NULL; @@ -590,7 +610,6 @@ static gboolean qio_channel_websock_handshake_io(QIOCha= nnel *ioc, trace_qio_channel_websock_handshake_fail(ioc, error_get_pretty(err= )); qio_task_set_error(task, err); qio_task_complete(task); - qio_task_free(task); wioc->hs_io_tag =3D 0; return FALSE; } @@ -603,12 +622,14 @@ static gboolean qio_channel_websock_handshake_io(QIOC= hannel *ioc, error_propagate(&wioc->io_err, err); =20 trace_qio_channel_websock_handshake_reply(ioc); + newdata =3D g_new0(QIOChannelWebsockData, 1); + newdata->task =3D g_steal_pointer(&data->task); wioc->hs_io_tag =3D qio_channel_add_watch( wioc->master, G_IO_OUT, qio_channel_websock_handshake_send, - task, - NULL); + newdata, + qio_channel_websock_data_free); return FALSE; } =20 @@ -904,12 +925,12 @@ void qio_channel_websock_handshake(QIOChannelWebsock = *ioc, gpointer opaque, GDestroyNotify destroy) { - QIOTask *task; + QIOChannelWebsockData *data =3D g_new0(QIOChannelWebsockData, 1); =20 - task =3D qio_task_new(OBJECT(ioc), - func, - opaque, - destroy); + data->task =3D qio_task_new(OBJECT(ioc), + func, + opaque, + destroy); =20 trace_qio_channel_websock_handshake_start(ioc); trace_qio_channel_websock_handshake_pending(ioc, G_IO_IN); @@ -917,8 +938,8 @@ void qio_channel_websock_handshake(QIOChannelWebsock *i= oc, ioc->master, G_IO_IN, qio_channel_websock_handshake_io, - task, - NULL); + data, + qio_channel_websock_data_free); } =20 =20 --=20 2.53.0