From patchwork Thu Nov 14 16:56:51 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kevin Wolf X-Patchwork-Id: 13875498 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 B1400D68B3D for ; Thu, 14 Nov 2024 16:59:00 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1tBd9x-000066-3p; Thu, 14 Nov 2024 11:57:33 -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 1tBd9e-0008Ou-Qp for qemu-devel@nongnu.org; Thu, 14 Nov 2024 11:57:15 -0500 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1tBd9c-0002a5-Kv for qemu-devel@nongnu.org; Thu, 14 Nov 2024 11:57:13 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1731603430; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ZIMNnOydHnArrL0aAQPB6i8307JCVgtIWZgz17oGRBM=; b=W9v1PRomOstwlf2Bu/suaefRrKj3j2u1y6gEISqehXzvZ/z37qm92Mcm0q1CPAOnEnRX4d 9jT35yQYSZyx5MtCZ+gbEukRust9GTsj1JnQ94f1/2kD8EOFfRncQH9bt8K8C2E8vQ+yQS Xr34NAsB95voH5fcrJ8juPLclIpruFU= Received: from mx-prod-mc-05.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-252-QDYARnvIP_2w6O60FkON_w-1; Thu, 14 Nov 2024 11:57:08 -0500 X-MC-Unique: QDYARnvIP_2w6O60FkON_w-1 X-Mimecast-MFC-AGG-ID: QDYARnvIP_2w6O60FkON_w Received: from mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.17]) (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-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id BF4EC1955F42; Thu, 14 Nov 2024 16:57:07 +0000 (UTC) Received: from merkur.redhat.com (unknown [10.39.192.6]) by mx-prod-int-05.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id EBF3C1955F43; Thu, 14 Nov 2024 16:57:05 +0000 (UTC) From: Kevin Wolf To: qemu-block@nongnu.org Cc: kwolf@redhat.com, qemu-devel@nongnu.org Subject: [PULL 2/8] parallels: fix possible int overflow Date: Thu, 14 Nov 2024 17:56:51 +0100 Message-ID: <20241114165657.254256-3-kwolf@redhat.com> In-Reply-To: <20241114165657.254256-1-kwolf@redhat.com> References: <20241114165657.254256-1-kwolf@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.0 on 10.30.177.17 Received-SPF: pass client-ip=170.10.133.124; envelope-from=kwolf@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -21 X-Spam_score: -2.2 X-Spam_bar: -- X-Spam_report: (-2.2 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.122, 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_H3=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=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+qemu-devel=archiver.kernel.org@nongnu.org Sender: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org From: Dmitry Frolov The sum "cluster_index + count" may overflow uint32_t. Found by Linux Verification Center (linuxtesting.org) with SVACE. Signed-off-by: Dmitry Frolov Message-ID: <20241106080521.219255-2-frolov@swemel.ru> Reviewed-by: Kevin Wolf Signed-off-by: Kevin Wolf --- block/parallels.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/block/parallels.c b/block/parallels.c index 9205a0864f..071b6dcaf8 100644 --- a/block/parallels.c +++ b/block/parallels.c @@ -184,11 +184,11 @@ static int mark_used(BlockDriverState *bs, unsigned long *bitmap, BDRVParallelsState *s = bs->opaque; uint32_t cluster_index = host_cluster_index(s, off); unsigned long next_used; - if (cluster_index + count > bitmap_size) { + if ((uint64_t)cluster_index + count > bitmap_size) { return -E2BIG; } next_used = find_next_bit(bitmap, bitmap_size, cluster_index); - if (next_used < cluster_index + count) { + if (next_used < (uint64_t)cluster_index + count) { return -EBUSY; } bitmap_set(bitmap, cluster_index, count);