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 C157BC7EE2F for ; Sun, 28 May 2023 19:17:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229829AbjE1TR5 (ORCPT ); Sun, 28 May 2023 15:17:57 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:37118 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229821AbjE1TR4 (ORCPT ); Sun, 28 May 2023 15:17:56 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C86ECC9 for ; Sun, 28 May 2023 12:17:52 -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 76A9461A14 for ; Sun, 28 May 2023 19:17:52 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 93481C433EF; Sun, 28 May 2023 19:17:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1685301471; bh=/qKhNrWfvzFdzQz2sPlreJy0/idtBkrSut+nElfdZjo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=kx4PI09r8DoAepkFE0/o2w2k1zTzDW7EeksTsJ3f/1vWy4Anc3sIhPMtlZqQQ8dYV XnnpASYvSiwOgHzhx/QrpJLlOMzkVMbVq9mPYmng7wzQjnZ3u4tPs3B7X3WWwNN5e6 4p3mhJmx8vrhCj29HQtbwHL/cZm8D0ax2yxiNi14= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Hao Zeng , Steven Rostedt , Sasha Levin Subject: [PATCH 4.19 042/132] recordmcount: Fix memory leaks in the uwrite function Date: Sun, 28 May 2023 20:09:41 +0100 Message-Id: <20230528190834.871734307@linuxfoundation.org> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230528190833.565872088@linuxfoundation.org> References: <20230528190833.565872088@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 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 d3e61dcc61295..ae1ae7c86d0c6 100644 --- a/scripts/recordmcount.c +++ b/scripts/recordmcount.c @@ -132,6 +132,7 @@ uwrite(int const fd, void const *const buf, size_t const count) { size_t cnt = count; off_t idx = 0; + void *p = NULL; file_updated = 1; @@ -139,7 +140,10 @@ uwrite(int const fd, 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