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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 47624C77B7C for ; Tue, 9 May 2023 03:57:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234628AbjEID5f (ORCPT ); Mon, 8 May 2023 23:57:35 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:38750 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234625AbjEID4j (ORCPT ); Mon, 8 May 2023 23:56:39 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [IPv6:2604:1380:4641:c500::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 262E6D875; Mon, 8 May 2023 20:55:48 -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 7340D643EC; Tue, 9 May 2023 03:55:43 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B8D6BC433D2; Tue, 9 May 2023 03:55:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1683604542; bh=V+SRqTeOIQkCJr1YG3oqjich7N1hefNlgQc35gKG3p0=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Lvio2sDBwLyo72juzuVC5SNby7Dh6K5ZnwMoCWIzqYnY70VZy/vcEzP8bKtLI6RUG AVeFwFKgz72jM2LUGFyHCmbhr1/Kke4F0RNHEbiSsObGaDs2cnQ93aQTfb6Y6UElzS FjNux46nOIrbgXVPXSkoJaBtCIUdZg/Uq3azj2GViVB8qvfEW0aYe+DTfNp3UirpAG Ie4uy+g7aSLOisCdJpJGqwlLBZ/ooxSAmQqPSClYfLJVxqjEXNUIIk2Zv8UeHfv9fK brEiG+BO4pyKVMmHyaQW2HoA/vmHvmqAAvpXnyQCCd7LSZcOm9cRXfpx/KeHlHLev4 r7V5dYuQ7VvlQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Hao Zeng , Steven Rostedt , Sasha Levin , chenhuacai@kernel.org, zhangqing@loongson.cn Subject: [PATCH AUTOSEL 6.1 5/5] recordmcount: Fix memory leaks in the uwrite function Date: Mon, 8 May 2023 23:55:29 -0400 Message-Id: <20230509035533.60269-5-sashal@kernel.org> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230509035533.60269-1-sashal@kernel.org> References: <20230509035533.60269-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Hao Zeng [ Upstream commit fa359d068574d29e7d2f0fdd0ebe4c6a12b5cfb9 ] Common realloc mistake: 'file_append' nulled but not freed upon failure Link: https://lkml.kernel.org/r/20230426010527.703093-1-zenghao@kylinos.cn Signed-off-by: Hao Zeng Suggested-by: Steven Rostedt Signed-off-by: Steven Rostedt (Google) Signed-off-by: Sasha Levin --- scripts/recordmcount.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/scripts/recordmcount.c b/scripts/recordmcount.c index cce12e1971d85..ec692af8ce9eb 100644 --- a/scripts/recordmcount.c +++ b/scripts/recordmcount.c @@ -102,6 +102,7 @@ static ssize_t uwrite(void const *const buf, size_t const count) { size_t cnt = count; off_t idx = 0; + void *p = NULL; file_updated = 1; @@ -109,7 +110,10 @@ static ssize_t uwrite(void const *const buf, size_t const count) off_t aoffset = (file_ptr + count) - file_end; if (aoffset > file_append_size) { - file_append = realloc(file_append, aoffset); + p = realloc(file_append, aoffset); + if (!p) + free(file_append); + file_append = p; file_append_size = aoffset; } if (!file_append) { -- 2.39.2