From nobody Fri Dec 19 16:00:59 2025 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 CCA7EFA3740 for ; Mon, 24 Oct 2022 14:02:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234310AbiJXOCj (ORCPT ); Mon, 24 Oct 2022 10:02:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60960 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S235830AbiJXOBs (ORCPT ); Mon, 24 Oct 2022 10:01:48 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 984BDBECC1; Mon, 24 Oct 2022 05:47:49 -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 dfw.source.kernel.org (Postfix) with ESMTPS id 8948A61325; Mon, 24 Oct 2022 12:46:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9D91BC433C1; Mon, 24 Oct 2022 12:46:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1666615568; bh=1i8zogkR9T6NCoZU+5CHCQYY7T+Jg21kj+WmzzdA27o=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Zf9qic1hMXJn58boWXkiebvNZpnxqzgGqh3sRfCoE1u6XZd4E4G+XNSd3GyzM3Ljt okTxBZ/M+LaBK4rgtvvXJYNyPc50+iIddn9iCQalfXDCC4/h1OLduXYA+l1SPXgq1O IjF87lvNbyf4idv9FwG2gHf7SW9Isyvu4h+HvUHA= 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 5.15 293/530] fpga: prevent integer overflow in dfl_feature_ioctl_set_irq() Date: Mon, 24 Oct 2022 13:30:37 +0200 Message-Id: <20221024113058.328763973@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221024113044.976326639@linuxfoundation.org> References: <20221024113044.976326639@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 f86666cf2c6a..c38143ef23c6 100644 --- a/drivers/fpga/dfl.c +++ b/drivers/fpga/dfl.c @@ -1864,7 +1864,7 @@ 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