From nobody Sat Feb 7 15:48:54 2026 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AD814C4332F for ; Wed, 19 Oct 2022 10:48:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234054AbiJSKr7 (ORCPT ); Wed, 19 Oct 2022 06:47:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:40546 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232947AbiJSKpv (ORCPT ); Wed, 19 Oct 2022 06:45:51 -0400 Received: from ams.source.kernel.org (ams.source.kernel.org [IPv6:2604:1380:4601:e00::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6728A11D984; Wed, 19 Oct 2022 03:21:37 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 936CCB82454; Wed, 19 Oct 2022 09:00:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id E50F7C433D7; Wed, 19 Oct 2022 09:00:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666170043; bh=qZLcI+C2kMZApJ2J7MvfP6RYfBi+1GyHo4kolVk2Mq4=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=XdPWLO8NskYBrV0Pw7vdMqoiUsDh8cIpRkrQjNOfdbGG3syKKPX85+1FkxHgrsbEZ zVry5oB3oVmO3Mv7iAzHaNbCyM6IdC7wznq/cAr7PND+W39cTxqwPSPN2QVlx8NTfl 7b49AVfi31r7CFyaKyof2MLH5uMDUb7R/59uuWP4= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Dan Carpenter , Xu Yilun , Sasha Levin Subject: [PATCH 6.0 505/862] fpga: prevent integer overflow in dfl_feature_ioctl_set_irq() Date: Wed, 19 Oct 2022 10:29:52 +0200 Message-Id: <20221019083312.305200120@linuxfoundation.org> X-Mailer: git-send-email 2.38.0 In-Reply-To: <20221019083249.951566199@linuxfoundation.org> References: <20221019083249.951566199@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Type: text/plain; charset="utf-8" From: Dan Carpenter [ Upstream commit 939bc5453b8cbdde9f1e5110ce8309aedb1b501a ] The "hdr.count * sizeof(s32)" multiplication can overflow on 32 bit systems leading to memory corruption. Use array_size() to fix that. Fixes: 322b598be4d9 ("fpga: dfl: introduce interrupt trigger setting API") Signed-off-by: Dan Carpenter Acked-by: Xu Yilun Link: https://lore.kernel.org/r/YxBAtYCM38dM7yzI@kili Signed-off-by: Xu Yilun Signed-off-by: Sasha Levin --- drivers/fpga/dfl.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/fpga/dfl.c b/drivers/fpga/dfl.c index 5498bc337f8b..b9aae85ba930 100644 --- a/drivers/fpga/dfl.c +++ b/drivers/fpga/dfl.c @@ -1866,7 +1866,7 @@ long dfl_feature_ioctl_set_irq(struct platform_device= *pdev, return -EINVAL; =20 fds =3D memdup_user((void __user *)(arg + sizeof(hdr)), - hdr.count * sizeof(s32)); + array_size(hdr.count, sizeof(s32))); if (IS_ERR(fds)) return PTR_ERR(fds); =20 --=20 2.35.1