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,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 ED013C2BA83 for ; Fri, 14 Feb 2020 17:25:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C83682168B for ; Fri, 14 Feb 2020 17:25:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581701116; bh=VE72fj0GrvsmScHPaEP/ZnlRnMn2L0iaATmIuBbj9ic=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=d3TyjttxyPXlrfFrbZtqaEqu5WCYvTUDpY2/B6Lw9Yo9X9HJjSeuit0Bd1Yoef+/R j/31JYBBzy0ag07O7H7Jg3jZpDzvoHTj4Skgqr7VEnoAcbzxi0LHm3lflIIuBqAD0l A4S3Mdrd1Nrnl734Z7SyjvlZxCBW4jlsdpmglhCs= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2391096AbgBNQIy (ORCPT ); Fri, 14 Feb 2020 11:08:54 -0500 Received: from mail.kernel.org ([198.145.29.99]:60100 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2390267AbgBNQIR (ORCPT ); Fri, 14 Feb 2020 11:08:17 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (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 1FC092187F; Fri, 14 Feb 2020 16:08:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1581696496; bh=VE72fj0GrvsmScHPaEP/ZnlRnMn2L0iaATmIuBbj9ic=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OSxk74FNcGKx8bt/3oLWEoUZWjvfW2TVA+54cDfHCPj2yPlrJWxyeFJlhGuRNM9/K INo3VOJUBunmF2zPOofVX/J+MifkNxqxcvBxA3s/gICQoNsK2LbpQfVOaNjD06jvo9 q1BH3G+ZVQlNs1DjAyB/WP5yy2DM7AiJEBEe+ieM= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Simon Schwartz , Greg Kroah-Hartman , Sasha Levin Subject: [PATCH AUTOSEL 5.4 301/459] driver core: platform: Prevent resouce overflow from causing infinite loops Date: Fri, 14 Feb 2020 10:59:11 -0500 Message-Id: <20200214160149.11681-301-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200214160149.11681-1-sashal@kernel.org> References: <20200214160149.11681-1-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: Simon Schwartz [ Upstream commit 39cc539f90d035a293240c9443af50be55ee81b8 ] num_resources in the platform_device struct is declared as a u32. The for loops that iterate over num_resources use an int as the counter, which can cause infinite loops on architectures with smaller ints. Change the loop counters to u32. Signed-off-by: Simon Schwartz Link: https://lore.kernel.org/r/2201ce63a2a171ffd2ed14e867875316efcf71db.camel@theschwartz.xyz Signed-off-by: Greg Kroah-Hartman Signed-off-by: Sasha Levin --- drivers/base/platform.c | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-) diff --git a/drivers/base/platform.c b/drivers/base/platform.c index 3c0cd20925b71..ee99b15581290 100644 --- a/drivers/base/platform.c +++ b/drivers/base/platform.c @@ -27,6 +27,7 @@ #include #include #include +#include #include "base.h" #include "power/power.h" @@ -48,7 +49,7 @@ EXPORT_SYMBOL_GPL(platform_bus); struct resource *platform_get_resource(struct platform_device *dev, unsigned int type, unsigned int num) { - int i; + u32 i; for (i = 0; i < dev->num_resources; i++) { struct resource *r = &dev->resource[i]; @@ -226,7 +227,7 @@ struct resource *platform_get_resource_byname(struct platform_device *dev, unsigned int type, const char *name) { - int i; + u32 i; for (i = 0; i < dev->num_resources; i++) { struct resource *r = &dev->resource[i]; @@ -473,7 +474,8 @@ EXPORT_SYMBOL_GPL(platform_device_add_properties); */ int platform_device_add(struct platform_device *pdev) { - int i, ret; + u32 i; + int ret; if (!pdev) return -EINVAL; @@ -562,7 +564,7 @@ EXPORT_SYMBOL_GPL(platform_device_add); */ void platform_device_del(struct platform_device *pdev) { - int i; + u32 i; if (!IS_ERR_OR_NULL(pdev)) { device_del(&pdev->dev); -- 2.20.1