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 X-Spam-Level: X-Spam-Status: No, score=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DF0D2C43141 for ; Sat, 16 Nov 2019 15:41:24 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AE6F320718 for ; Sat, 16 Nov 2019 15:41:24 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573918884; bh=uWZClTrsqmEFx8byq1mK09fgpItzYGHhc8KLTIkX/1U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=G0xp2l+E3ulj69dfYMuhwUBzAj5RfQqZh7Wn2amkXXJT7SHSI7U5vQo/gktjjvJgY spyF2vEqUcEBHi7sOZh1VyACMm9Trsg85Ky3mso+Ozo/godMZovZddCoMX7hZUF/4R 2HO8qtUMHejeKRcim4Ucn6ZylhTEhz2Q4g7eMaIw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727675AbfKPPlX (ORCPT ); Sat, 16 Nov 2019 10:41:23 -0500 Received: from mail.kernel.org ([198.145.29.99]:44308 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727830AbfKPPlU (ORCPT ); Sat, 16 Nov 2019 10:41:20 -0500 Received: from sasha-vm.mshome.net (unknown [50.234.116.4]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 6C33820730; Sat, 16 Nov 2019 15:41:19 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1573918879; bh=uWZClTrsqmEFx8byq1mK09fgpItzYGHhc8KLTIkX/1U=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HE/rOSQzwYjhIJpIj6M2ykxTXZuh5t+0d8DsU4R1oH8lifnaJ5J8nrSOhr5ifxBo/ sLlciVkJtFvRGa7vy07LaqaIbxPww3lkZ0YGFTNkbBHme/LouxZTyyeTj6m+piSODK +QCVt51DRL2/wDmH3DrFf/48dcCou/MugiEOnXc4= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Dan Carpenter , Geoff Levand , Michael Ellerman , Sasha Levin , linuxppc-dev@lists.ozlabs.org Subject: [PATCH AUTOSEL 4.19 010/237] powerpc: Fix signedness bug in update_flash_db() Date: Sat, 16 Nov 2019 10:37:25 -0500 Message-Id: <20191116154113.7417-10-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191116154113.7417-1-sashal@kernel.org> References: <20191116154113.7417-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Dan Carpenter [ Upstream commit 014704e6f54189a203cc14c7c0bb411b940241bc ] The "count < sizeof(struct os_area_db)" comparison is type promoted to size_t so negative values of "count" are treated as very high values and we accidentally return success instead of a negative error code. This doesn't really change runtime much but it fixes a static checker warning. Signed-off-by: Dan Carpenter Acked-by: Geoff Levand Signed-off-by: Michael Ellerman Signed-off-by: Sasha Levin --- arch/powerpc/platforms/ps3/os-area.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/ps3/os-area.c b/arch/powerpc/platforms/ps3/os-area.c index cdbfc5cfd6f38..f5387ad822798 100644 --- a/arch/powerpc/platforms/ps3/os-area.c +++ b/arch/powerpc/platforms/ps3/os-area.c @@ -664,7 +664,7 @@ static int update_flash_db(void) db_set_64(db, &os_area_db_id_rtc_diff, saved_params.rtc_diff); count = os_area_flash_write(db, sizeof(struct os_area_db), pos); - if (count < sizeof(struct os_area_db)) { + if (count < 0 || count < sizeof(struct os_area_db)) { pr_debug("%s: os_area_flash_write failed %zd\n", __func__, count); error = count < 0 ? count : -EIO; -- 2.20.1