From mboxrd@z Thu Jan 1 00:00:00 1970 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 2945BC83F1B for ; Mon, 14 Jul 2025 05:35:34 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1ubBq4-0001Wb-Oi; Mon, 14 Jul 2025 01:34:56 -0400 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 1ubBpp-000102-JS for qemu-devel@nongnu.org; Mon, 14 Jul 2025 01:34:41 -0400 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 1ubBpo-000362-3a for qemu-devel@nongnu.org; Mon, 14 Jul 2025 01:34:41 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1752471279; 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=aE/wKQGzoh4jWmtAUGCBzWi5yGD7I8dxBOHfLcHtRck=; b=FspeL2YScgg3swIP/Dyd7oxUXj1PmR7FPKZmxxcoex2CKBV64G9qNmw3A3rZrrZnGRzn/M 4G7FPFYgx+Klq08d+/UP1Xmi+fcX5vfjdtwWI3iyi73yYF063YWYpdyObeHWx1K5WmSnGs fYK48CN7fR7mYYZdC5rakkzPlb6Qe4g= Received: from mx-prod-mc-06.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-364-_RWvesbGOkO2Cy90mU4sFQ-1; Mon, 14 Jul 2025 01:34:35 -0400 X-MC-Unique: _RWvesbGOkO2Cy90mU4sFQ-1 X-Mimecast-MFC-AGG-ID: _RWvesbGOkO2Cy90mU4sFQ_1752471274 Received: from mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.40]) (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-06.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id C0D9F1800290; Mon, 14 Jul 2025 05:34:33 +0000 (UTC) Received: from localhost.localdomain (unknown [10.72.112.55]) by mx-prod-int-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id AC31F19560A3; Mon, 14 Jul 2025 05:34:30 +0000 (UTC) From: Jason Wang To: qemu-devel@nongnu.org Cc: Anastasia Belova , qemu-stable@nongnu.org, Ilya Maximets , Jason Wang Subject: [PULL 01/13] net: fix buffer overflow in af_xdp_umem_create() Date: Mon, 14 Jul 2025 13:34:11 +0800 Message-ID: <20250714053423.10415-2-jasowang@redhat.com> In-Reply-To: <20250714053423.10415-1-jasowang@redhat.com> References: <20250714053423.10415-1-jasowang@redhat.com> MIME-Version: 1.0 Content-type: text/plain Content-Transfer-Encoding: 8bit X-Scanned-By: MIMEDefang 3.0 on 10.30.177.40 Received-SPF: pass client-ip=170.10.133.124; envelope-from=jasowang@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -30 X-Spam_score: -3.1 X-Spam_bar: --- X-Spam_report: (-3.1 / 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_H5=-1, RCVD_IN_MSPIKE_WL=-0.01, 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 From: Anastasia Belova s->pool has n_descs elements so maximum i should be n_descs - 1. Fix the upper bound. Found by Linux Verification Center (linuxtesting.org) with SVACE. Fixes: cb039ef3d9 ("net: add initial support for AF_XDP network backend") Cc: qemu-stable@nongnu.org Reviewed-by: Ilya Maximets Signed-off-by: Anastasia Belova Signed-off-by: Jason Wang --- net/af-xdp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/net/af-xdp.c b/net/af-xdp.c index 01c5fb914e..d022534d76 100644 --- a/net/af-xdp.c +++ b/net/af-xdp.c @@ -323,7 +323,7 @@ static int af_xdp_umem_create(AFXDPState *s, int sock_fd, Error **errp) s->pool = g_new(uint64_t, n_descs); /* Fill the pool in the opposite order, because it's a LIFO queue. */ - for (i = n_descs; i >= 0; i--) { + for (i = n_descs - 1; i >= 0; i--) { s->pool[i] = i * XSK_UMEM__DEFAULT_FRAME_SIZE; } s->n_pool = n_descs; -- 2.42.0