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Mon, 13 Mar 2023 07:45:25 -0400 Received: from mimecast-mx02.redhat.com (mx3-rdu2.redhat.com [66.187.233.73]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-589-7Gq2Ye3kNYKwlZBnIjA-3g-1; Mon, 13 Mar 2023 07:45:13 -0400 Received: from smtp.corp.redhat.com (int-mx01.intmail.prod.int.rdu2.redhat.com [10.11.54.1]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B9C801C04328; Mon, 13 Mar 2023 11:45:12 +0000 (UTC) Received: from localhost (unknown [10.39.208.8]) by smtp.corp.redhat.com (Postfix) with ESMTP id EA0264042AC2; Mon, 13 Mar 2023 11:45:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1678707917; 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=QVXYek2aD1GDbLaBzwM+PhSho8Hk9PdY3riLVXeSemU=; b=ONWchAzWZ43h8dn9x7f8tz2Q1zECAlrvAYHsan7XoOr88pcLTQEkf96CQsmhXfCpAi4BUV UGDTlEyGgtzTcWrR1MCD9lKeVVX+5J0XZ+Fjbn35p6nTln/avEH/zt1mdndpdGpdkF+oiQ QLJL+yVU/taHdBwnGl59iz7UibVLhlA= X-MC-Unique: 7Gq2Ye3kNYKwlZBnIjA-3g-1 From: marcandre.lureau@redhat.com To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, Stefan Hajnoczi , Samuel Thibault , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Stefan Weil , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Wainer dos Santos Moschetta , Laurent Vivier , Joel Stanley , Kevin Wolf , Paolo Bonzini , qemu-arm@nongnu.org, Eric Blake , =?UTF-8?q?Alex=20Benn=C3=A9e?= , Michael Roth , "Dr. David Alan Gilbert" , Thomas Huth , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Beraldo Leal , Stefan Berger , Fam Zheng , Hanna Reitz , Peter Maydell , Markus Armbruster , Jason Wang Subject: [PULL 20/25] qmp: 'add_client' actually expects sockets Date: Mon, 13 Mar 2023 15:43:30 +0400 Message-Id: <20230313114335.424093-21-marcandre.lureau@redhat.com> In-Reply-To: <20230313114335.424093-1-marcandre.lureau@redhat.com> References: <20230313114335.424093-1-marcandre.lureau@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.1 on 10.11.54.1 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=marcandre.lureau@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=-0.001, 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_HELO_NONE=0.001, SPF_PASS=-0.001 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: 1678708104653100003 From: Marc-Andr=C3=A9 Lureau Whether it is SPICE, VNC, D-Bus, or the socket chardev, they all actually expect a socket kind or will fail in different ways at runtime. Throw an error early if the given 'add_client' fd is not a socket, and close it to avoid leaks. This allows to replace the close() call with a more correct & portable closesocket() version. (this will allow importing sockets on Windows with a specialized command in the following patch, while keeping the remaining monitor associated sockets/add_client code & usage untouched) Signed-off-by: Marc-Andr=C3=A9 Lureau Reviewed-by: Philippe Mathieu-Daud=C3=A9 Acked-by: Markus Armbruster Message-Id: <20230306122751.2355515-6-marcandre.lureau@redhat.com> --- qapi/misc.json | 3 +++ monitor/qmp-cmds.c | 7 +++++++ 2 files changed, 10 insertions(+) diff --git a/qapi/misc.json b/qapi/misc.json index 27ef5a2b20..f0217cfba0 100644 --- a/qapi/misc.json +++ b/qapi/misc.json @@ -14,6 +14,9 @@ # Allow client connections for VNC, Spice and socket based # character devices to be passed in to QEMU via SCM_RIGHTS. # +# If the FD associated with @fdname is not a socket, the command will fail= and +# the FD will be closed. +# # @protocol: protocol name. Valid names are "vnc", "spice", "@dbus-display= " or # the name of a character device (eg. from -chardev id=3DXXXX) # diff --git a/monitor/qmp-cmds.c b/monitor/qmp-cmds.c index 859012aef4..b0f948d337 100644 --- a/monitor/qmp-cmds.c +++ b/monitor/qmp-cmds.c @@ -14,6 +14,7 @@ */ =20 #include "qemu/osdep.h" +#include "qemu/sockets.h" #include "monitor-internal.h" #include "monitor/qdev.h" #include "monitor/qmp-helpers.h" @@ -139,6 +140,12 @@ void qmp_add_client(const char *protocol, const char *= fdname, return; } =20 + if (!fd_is_socket(fd)) { + error_setg(errp, "parameter @fdname must name a socket"); + close(fd); + return; + } + for (i =3D 0; i < ARRAY_SIZE(protocol_table); i++) { if (!strcmp(protocol, protocol_table[i].name)) { if (!protocol_table[i].add_client(fd, has_skipauth, skipauth, --=20 2.39.2