From patchwork Tue Feb 11 14:33:29 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?q?C=C3=A9dric_Le_Goater?= X-Patchwork-Id: 13969778 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id D5DFBC0219B for ; Tue, 11 Feb 2025 14:35:24 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1thrKp-0006S4-H4; Tue, 11 Feb 2025 09:33:59 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1thrKn-0006Rb-Br for qemu-devel@nongnu.org; Tue, 11 Feb 2025 09:33:57 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1thrKl-0001sT-Lc for qemu-devel@nongnu.org; Tue, 11 Feb 2025 09:33:57 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1739284435; 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=rWeM8xEh0bgDY2ynaZY0NiCmiLKkWLzv3qy5lwA7tlY=; b=C8ahcU19t+265cMjjgKZMYvFUtT6MF/6kFg+9CgCoVi19StjRrXSchKAhWJqaqzNSUhA20 FUzvsEen9jdhyHER9wiU5xURiaBISp3cH8dvueVPXBaVvZXU4P4nM4Nd+oQr8z6J02yYhv vOnEoARXzAvKhCiKeYrtAeURHduf/Cw= Received: from mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (ec2-35-165-154-97.us-west-2.compute.amazonaws.com [35.165.154.97]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-539-_sHfBJwYPJmaUxNbIRugew-1; Tue, 11 Feb 2025 09:33:50 -0500 X-MC-Unique: _sHfBJwYPJmaUxNbIRugew-1 X-Mimecast-MFC-AGG-ID: _sHfBJwYPJmaUxNbIRugew Received: from mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.93]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-08.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 5B36F1801A10 for ; Tue, 11 Feb 2025 14:33:49 +0000 (UTC) Received: from corto.redhat.com (unknown [10.45.224.39]) by mx-prod-int-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id 19F7F18008CC; Tue, 11 Feb 2025 14:33:47 +0000 (UTC) From: =?utf-8?q?C=C3=A9dric_Le_Goater?= To: qemu-devel@nongnu.org Cc: Alex Williamson , =?utf-8?q?C=C3=A9dric_Le_G?= =?utf-8?q?oater?= Subject: [PULL 01/12] vfio/igd: Fix potential overflow in igd_gtt_memory_size() Date: Tue, 11 Feb 2025 15:33:29 +0100 Message-ID: <20250211143340.787996-2-clg@redhat.com> In-Reply-To: <20250211143340.787996-1-clg@redhat.com> References: <20250211143340.787996-1-clg@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.93 Received-SPF: pass client-ip=170.10.129.124; envelope-from=clg@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -35 X-Spam_score: -3.6 X-Spam_bar: --- X-Spam_report: (-3.6 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-1.54, 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_H5=0.001, RCVD_IN_MSPIKE_WL=0.001, RCVD_IN_VALIDITY_RPBL_BLOCKED=0.001, RCVD_IN_VALIDITY_SAFE_BLOCKED=0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham 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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org The risk is mainly theoretical since the applied bit mask will keep the 'ggms' shift value below 3. Nevertheless, let's use a 64 bit integer type and resolve the coverity issue. Resolves: Coverity CID 1585908 Fixes: 1e1eac5f3dcd ("vfio/igd: canonicalize memory size calculations") Reviewed-by: Alex Williamson Link: https://lore.kernel.org/r/20250107130604.669697-1-clg@redhat.com Signed-off-by: Cédric Le Goater --- hw/vfio/igd.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/hw/vfio/igd.c b/hw/vfio/igd.c index 0740a5dd8cc9346a92c4613194faa8dea42e1d98..b5303ea565d6a344d0a43273f288bbb4a7f48327 100644 --- a/hw/vfio/igd.c +++ b/hw/vfio/igd.c @@ -133,7 +133,7 @@ static uint64_t igd_gtt_memory_size(int gen, uint16_t gmch) } else { ggms = (gmch >> IGD_GMCH_GEN8_GGMS_SHIFT) & IGD_GMCH_GEN8_GGMS_MASK; if (ggms != 0) { - ggms = 1 << ggms; + ggms = 1ULL << ggms; } }