From nobody Sat Dec 28 10:02:52 2024 Delivered-To: importer2@patchew.org Authentication-Results: mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass(p=none dis=none) header.from=redhat.com ARC-Seal: i=1; a=rsa-sha256; t=1720798799; cv=none; d=zohomail.com; s=zohoarc; b=TkAVHMt/oPX/MhgIsfPISGRIvzNjIiWh/QpdtBZ0vB27JcD8JlYP1D0DJ2OWY4WARx7aN86pn6Q09hV3wHtVCmvBsWFa++eGNQWG26KmZq3XA5vVpAE/zFCs9/QTXvngpmXLOG/PDRBeh8I0TlBhyj/8k61T7/jYHjNTE8dBYK0= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zohomail.com; s=zohoarc; t=1720798799; h=Content-Transfer-Encoding:Cc:Cc:Date:Date:From:From:List-Subscribe:List-Post:List-Id:List-Archive:List-Help:List-Unsubscribe:MIME-Version:Message-ID:Sender:Subject:Subject:To:To:Message-Id:Reply-To; bh=BShAKIQSR7HvyUMtjkZHE8fzP4hvMlZtx5L6ZVvwsW8=; b=bmsZrwIfYoZ60cpj15OFzfxPnGPhpXHiY5g7goV+MzmR/EOUSlWhcuyedvDYm1Y3xc6llFDrF91Xo+6cCaj6GDKxDxp6jziJ9TwSA6hGXSmu54gRwVe6FjmMEKfsUmXDXWMz/aqkIt0CR0aXMEb1B4g0+HN27b/cxDVgY2cM6pE= ARC-Authentication-Results: i=1; mx.zohomail.com; dkim=pass; spf=pass (zohomail.com: domain of gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=qemu-devel-bounces+importer2=patchew.org@nongnu.org; dmarc=pass header.from= (p=none dis=none) Return-Path: Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) by mx.zohomail.com with SMTPS id 1720798799553427.9391568813154; Fri, 12 Jul 2024 08:39:59 -0700 (PDT) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1sSIN5-00068n-HX; Fri, 12 Jul 2024 11:39:43 -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 1sSIMm-000537-Bc for qemu-devel@nongnu.org; Fri, 12 Jul 2024 11:39:27 -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 1sSIMa-0002U9-Tq for qemu-devel@nongnu.org; Fri, 12 Jul 2024 11:39:22 -0400 Received: from mail-ed1-f69.google.com (mail-ed1-f69.google.com [209.85.208.69]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-658-Z16BM4ojPG2hJ9omqzB8Xw-1; Fri, 12 Jul 2024 11:39:10 -0400 Received: by mail-ed1-f69.google.com with SMTP id 4fb4d7f45d1cf-57cad6e94e5so2002280a12.3 for ; Fri, 12 Jul 2024 08:39:09 -0700 (PDT) Received: from localhost.localdomain (host-82-57-51-153.retail.telecomitalia.it. [82.57.51.153]) by smtp.gmail.com with ESMTPSA id 4fb4d7f45d1cf-594bb960641sm4679266a12.8.2024.07.12.08.39.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 12 Jul 2024 08:39:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1720798751; 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; bh=BShAKIQSR7HvyUMtjkZHE8fzP4hvMlZtx5L6ZVvwsW8=; b=dOHSUeiit7Ii2L03JxnoHRCr2s997utMYqrClX7M6WCMXpZft2+K2ICYaYM90dI4lIF56u CTKZYH914pmPn8veNSoo4i4D0oMQtyE7xoBL7THdSAbm9K1Ak6TWxSL7bUhPhbUqOYcfxL vWx0v5vsZrUfdOt8PE+jT63NjfBqNVk= X-MC-Unique: Z16BM4ojPG2hJ9omqzB8Xw-1 X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1720798747; x=1721403547; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=BShAKIQSR7HvyUMtjkZHE8fzP4hvMlZtx5L6ZVvwsW8=; b=KVkVy4PPM076WJk9oDBjUk9pqryWYSaeTDjmGORbT3IuNPcpFE83k3TakyGCCrEs0n aOBXti6WF2rOzP3TtYzcnEtiNKuhAMl+M0lldTzOyNtbzAK1BC8pRpVU8aXnaDDc31// laurMLyPskRZmW1XkNVvZ9WU7NWwndjLMz4GXP+pMR4G2vNtg7m0yi+SBjmuEh6lfyI0 fIn3ORQnOvJ0L7tnspgUzsg5zsqQzEY93ykzgMLARTaWvfzKVjIcrqojzYFNhNCXkyZv kk8aJ3BZEt2FEdojaaq0lpeirHd68cP6wkv0vxEVT5yrt4sUX7fLs4+xHKPAonEEnmgk rVcg== X-Gm-Message-State: AOJu0YyitnESf3xJpJfeE0JkA6JxsBf5nDSOnnyEap9HB/9K/i6scX1/ TBJk1+WMzcR3LnW/xQPWy4gxtZRSC4X64ltpXx0L6gNom7CUU+4xvurDnpIc9ShDIWY2MnRXFGV 6OTLADtM/96/P/d0PpjeEzR9omWDR+23AzzgADlN/y6figN87TnHOgNtn3h40Lo/0fe45nrdM1L 7rbEnl3QN08+t4+WD3M4eEn0zZaUQR7VhyzJKI X-Received: by 2002:a05:6402:51d3:b0:582:7c35:8736 with SMTP id 4fb4d7f45d1cf-594b9ee1106mr9954313a12.12.1720798747645; Fri, 12 Jul 2024 08:39:07 -0700 (PDT) X-Google-Smtp-Source: AGHT+IFiLiUxtWPsFCtjHa6Om4HRNptbZUHpi3eE1kG5zh1+2gDv/JSVXBQt0oYAoLiLy/oI3k1uiQ== X-Received: by 2002:a05:6402:51d3:b0:582:7c35:8736 with SMTP id 4fb4d7f45d1cf-594b9ee1106mr9954284a12.12.1720798747000; Fri, 12 Jul 2024 08:39:07 -0700 (PDT) From: Stefano Garzarella To: qemu-devel@nongnu.org Cc: "Michael S. Tsirkin" , Raphael Norwitz , Stefano Garzarella , changpeng.liu@intel.com, Peter Maydell Subject: [PATCH] contrib/vhost-user-blk: fix overflowing expression Date: Fri, 12 Jul 2024 17:38:57 +0200 Message-ID: <20240712153857.207440-1-sgarzare@redhat.com> X-Mailer: git-send-email 2.45.2 MIME-Version: 1.0 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+importer2=patchew.org@nongnu.org; helo=lists.gnu.org; Received-SPF: pass client-ip=170.10.133.124; envelope-from=sgarzare@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=-0.138, 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, 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+importer2=patchew.org@nongnu.org Sender: qemu-devel-bounces+importer2=patchew.org@nongnu.org X-ZohoMail-DKIM: pass (identity @redhat.com) X-ZM-MESSAGEID: 1720798800790116300 Content-Type: text/plain; charset="utf-8" Coverity reported: >>> CID 1549454: Integer handling issues (OVERFLOW_BEFORE_WIDEN) >>> Potentially overflowing expression "le32_to_cpu(desc->num_sectors) << 9" with type "uint32_t" (32 bits, unsigned) is evaluated using 32-bit arithmetic, and then used in a context that expects an expression of type "uint64_t" (64 bits, unsigned). 199 le32_to_cpu(desc->num_sectors) << 9 }; Coverity noticed this issue after commit ab04420c3 ("contrib/vhost-user-*: use QEMU bswap helper functions"), but it was pre-existing and introduced from the beginning by commit caa1ee4313 ("vhost-user-blk: add discard/write zeroes features support"). Explicitly cast the 32-bit value before the shift to fix this issue. Fixes: Coverity CID 1549454 Fixes: 5ab04420c3 ("contrib/vhost-user-*: use QEMU bswap helper functions") Fixes: caa1ee4313 ("vhost-user-blk: add discard/write zeroes features suppo= rt") Cc: changpeng.liu@intel.com Suggested-by: Peter Maydell Signed-off-by: Stefano Garzarella Reviewed-by: Peter Maydell --- contrib/vhost-user-blk/vhost-user-blk.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/contrib/vhost-user-blk/vhost-user-blk.c b/contrib/vhost-user-b= lk/vhost-user-blk.c index 9492146855..6cc18a1c04 100644 --- a/contrib/vhost-user-blk/vhost-user-blk.c +++ b/contrib/vhost-user-blk/vhost-user-blk.c @@ -196,7 +196,7 @@ vub_discard_write_zeroes(VubReq *req, struct iovec *iov= , uint32_t iovcnt, VubDev *vdev_blk =3D req->vdev_blk; desc =3D buf; uint64_t range[2] =3D { le64_to_cpu(desc->sector) << 9, - le32_to_cpu(desc->num_sectors) << 9 }; + (uint64_t)le32_to_cpu(desc->num_sectors) << 9 }; if (type =3D=3D VIRTIO_BLK_T_DISCARD) { if (ioctl(vdev_blk->blk_fd, BLKDISCARD, range) =3D=3D 0) { g_free(buf); --=20 2.45.2