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[79.53.30.109]) by smtp.gmail.com with ESMTPSA id d75a77b69052e-43e12f41a0asm148192191cf.48.2024.05.23.07.55.48 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 23 May 2024 07:55:52 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1716476155; 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=JAQwZsc8cKAlH0q2kUc7Sw/ErfWrVXpWDlOF1f/YOjk=; b=YVwGjMDWzH4Xek+ghegA/VORyrl9uHyK+jhqg/FMcIAXHeZD3VYP+KgSW/0S6JmfOA1X2c ICLSzvGZoRBJT/moWCtFpqJ5hmNV4W3kXy1fyoLeDqig+C/Tib1Ouav8l7yFLBz8EzGgVs PyHoUiFen3ug9NEnDAi2W9xfXlSiZn8= X-MC-Unique: 10W5v2GiNry_d9v1GW7BQQ-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1716476153; x=1717080953; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=JAQwZsc8cKAlH0q2kUc7Sw/ErfWrVXpWDlOF1f/YOjk=; b=BntRTPMD/POqHjGa6gXXWlX0mN/0u5gMZa7naXK3ZN/s0SMacm+cW47offtpoYwfsd ka3/DN/5V6vKBGY1Es/8DoIgOrbPvtVWEwIRUtpj0WwVcEnM0EODiias74cFBiXUh/ki p7j9HFaYlmHlAWgxDXv9kBK6tb1RkTanU91h6cN0bGAkczi7JDZTsZ374PUESBAJ2B+e AknVNNiXu1/PexVOOP0GAdhD7snghkZiDbCrqBzikEnwfFZWW0wxgm8b+Qy0DDCq5ayE ItkyMDYz+8iJBthUGmiKh7XqvljV4Kq2+mSg3ykagXE4+mq2zsdIxpJPlurBMNxM7lE1 2vFg== X-Gm-Message-State: AOJu0YwEm1xfN9M5g7OYC27AYS25si/moH+qm+PE8o+Q6YNhf2BuU+ki xXv7MPrOCl/vQ48iGpu+FC89Fb0oSPo3Wh4DwLm54cySVarj379DaaeO5prAyAabaJrgoBQtjS4 OtGxOCqXwyBL6vrVqQ4CDwbO3+wUisNE8H7RSHHW7bKtk5ClYxpUa3cbjYl2zTbhkGl2Mztd2i7 fp/K2irNtyFUKN7sLVyIUzYrVCbk/tp/yvaqLl X-Received: by 2002:ac8:5dc8:0:b0:43a:43dc:f5e0 with SMTP id d75a77b69052e-43f9e089d65mr59625581cf.9.1716476153273; Thu, 23 May 2024 07:55:53 -0700 (PDT) X-Google-Smtp-Source: AGHT+IE4Dfku7jRiy/tU2GetMzIMaF0liT1J8UGbSy7sP31dqk4PdtJh/rzTfx5m4mvlqRrZcS18nQ== X-Received: by 2002:ac8:5dc8:0:b0:43a:43dc:f5e0 with SMTP id d75a77b69052e-43f9e089d65mr59625151cf.9.1716476152803; Thu, 23 May 2024 07:55:52 -0700 (PDT) From: Stefano Garzarella To: qemu-devel@nongnu.org Cc: Gerd Hoffmann , Eric Blake , Igor Mammedov , Paolo Bonzini , Laurent Vivier , =?UTF-8?q?Philippe=20Mathieu-Daud=C3=A9?= , Brad Smith , "Michael S. Tsirkin" , =?UTF-8?q?Daniel=20P=2E=20Berrang=C3=A9?= , Coiby Xu , Markus Armbruster , David Hildenbrand , slp@redhat.com, Eduardo Habkost , stefanha@redhat.com, Hanna Reitz , Raphael Norwitz , Jason Wang , =?UTF-8?q?Marc-Andr=C3=A9=20Lureau?= , Kevin Wolf , gmaglione@redhat.com, Thomas Huth , qemu-block@nongnu.org, Stefano Garzarella Subject: [PATCH v5 03/13] libvhost-user: mask F_INFLIGHT_SHMFD if memfd is not supported Date: Thu, 23 May 2024 16:55:12 +0200 Message-ID: <20240523145522.313012-4-sgarzare@redhat.com> X-Mailer: git-send-email 2.45.1 In-Reply-To: <20240523145522.313012-1-sgarzare@redhat.com> References: <20240523145522.313012-1-sgarzare@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable 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=sgarzare@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_SORBS_WEB=1.5, SPF_HELO_NONE=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: 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: 1716476200366100001 libvhost-user will panic when receiving VHOST_USER_GET_INFLIGHT_FD message if MFD_ALLOW_SEALING is not defined, since it's not able to create a memfd. VHOST_USER_GET_INFLIGHT_FD is used only if VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD is negotiated. So, let's mask that feature if the backend is not able to properly handle these messages. Reviewed-by: Philippe Mathieu-Daud=C3=A9 Tested-by: Philippe Mathieu-Daud=C3=A9 Acked-by: Stefan Hajnoczi Signed-off-by: Stefano Garzarella Reviewed-by: David Hildenbrand --- subprojects/libvhost-user/libvhost-user.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/subprojects/libvhost-user/libvhost-user.c b/subprojects/libvho= st-user/libvhost-user.c index a11afd1960..2c20cdc16e 100644 --- a/subprojects/libvhost-user/libvhost-user.c +++ b/subprojects/libvhost-user/libvhost-user.c @@ -1674,6 +1674,17 @@ vu_get_protocol_features_exec(VuDev *dev, VhostUserM= sg *vmsg) features |=3D dev->iface->get_protocol_features(dev); } =20 +#ifndef MFD_ALLOW_SEALING + /* + * If MFD_ALLOW_SEALING is not defined, we are not able to handle + * VHOST_USER_GET_INFLIGHT_FD messages, since we can't create a memfd. + * Those messages are used only if VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD + * is negotiated. A device implementation can enable it, so let's mask + * it to avoid a runtime panic. + */ + features &=3D ~(1ULL << VHOST_USER_PROTOCOL_F_INFLIGHT_SHMFD); +#endif + vmsg_set_reply_u64(vmsg, features); return true; } --=20 2.45.1