From patchwork Mon Jan 31 10:55:34 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 538899 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 0DD4CC433FE for ; Mon, 31 Jan 2022 11:03:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348587AbiAaLDV (ORCPT ); Mon, 31 Jan 2022 06:03:21 -0500 Received: from ams.source.kernel.org ([145.40.68.75]:48590 "EHLO ams.source.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1358627AbiAaLBr (ORCPT ); Mon, 31 Jan 2022 06:01:47 -0500 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 ams.source.kernel.org (Postfix) with ESMTPS id 75149B82A5C; Mon, 31 Jan 2022 11:01:46 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 9E7DBC340EF; Mon, 31 Jan 2022 11:01:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1643626905; bh=caX1vW/N9Bbrw08pMT4bebAquw6LqUYjL5fAXaW2NgY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=uVy0VqyoPqrUujGZ8+Kx3DtAsyXtgB5UOyBnVkh62E5Mncsd+2hdyUSkKPviP3uHK Z2oTV7uHDGLf78JwIoOcGezyNcbFary0zTSMOQIG0TG4/6B1ECStWNVgEevzkTg7MG 7JaIXnqYcp89zXDQrWWv+nuZlyA2lXMNOcJI/bFU= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Xiaoke Wang , "Steven Rostedt (Google)" Subject: [PATCH 5.10 013/100] tracing/histogram: Fix a potential memory leak for kstrdup() Date: Mon, 31 Jan 2022 11:55:34 +0100 Message-Id: <20220131105220.901115801@linuxfoundation.org> X-Mailer: git-send-email 2.35.1 In-Reply-To: <20220131105220.424085452@linuxfoundation.org> References: <20220131105220.424085452@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Xiaoke Wang commit e629e7b525a179e29d53463d992bdee759c950fb upstream. kfree() is missing on an error path to free the memory allocated by kstrdup(): p = param = kstrdup(data->params[i], GFP_KERNEL); So it is better to free it via kfree(p). Link: https://lkml.kernel.org/r/tencent_C52895FD37802832A3E5B272D05008866F0A@qq.com Cc: stable@vger.kernel.org Fixes: d380dcde9a07c ("tracing: Fix now invalid var_ref_vals assumption in trace action") Signed-off-by: Xiaoke Wang Signed-off-by: Steven Rostedt (Google) Signed-off-by: Greg Kroah-Hartman --- kernel/trace/trace_events_hist.c | 1 + 1 file changed, 1 insertion(+) --- a/kernel/trace/trace_events_hist.c +++ b/kernel/trace/trace_events_hist.c @@ -3506,6 +3506,7 @@ static int trace_action_create(struct hi var_ref_idx = find_var_ref_idx(hist_data, var_ref); if (WARN_ON(var_ref_idx < 0)) { + kfree(p); ret = var_ref_idx; goto err; }