From patchwork Wed Jun 7 20:16:37 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg Kroah-Hartman X-Patchwork-Id: 690355 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 C0528C7EE2E for ; Wed, 7 Jun 2023 20:46:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234725AbjFGUq0 (ORCPT ); Wed, 7 Jun 2023 16:46:26 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46642 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S234712AbjFGUqL (ORCPT ); Wed, 7 Jun 2023 16:46:11 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6D1C26A3; Wed, 7 Jun 2023 13:45:53 -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 715A864696; Wed, 7 Jun 2023 20:45:53 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 581CFC433EF; Wed, 7 Jun 2023 20:45:52 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1686170752; bh=ZB6M39BeMbXHSEc2iHAHssPsPmPBgdQZVXezDDSODgM=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=LnbcHsaztEYpes20dQS64ixdoAdOSe6QSEf9xPja1mcuwN58lEMvYysZfptjK02oe e7cWGLasdVa7JN9KD0okhl/iKiYK5eRBJgg3r5n9lFRyEdIrZNSI+t924a7w5qvaAE hvlx1gsFFzE2b3mgoInQ7ceEd5dPgvY1dFNibfNs= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Luis Chamberlain , Russ Weight , Tianfei Zhang , Shuah Khan , Colin Ian King , Randy Dunlap , linux-kselftest@vger.kernel.org, Dan Carpenter , Takashi Iwai , Mirsad Goran Todorovac , Dan Carpenter Subject: [PATCH 6.1 204/225] test_firmware: fix a memory leak with reqs buffer Date: Wed, 7 Jun 2023 22:16:37 +0200 Message-ID: <20230607200921.037409650@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230607200913.334991024@linuxfoundation.org> References: <20230607200913.334991024@linuxfoundation.org> User-Agent: quilt/0.67 MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-kselftest@vger.kernel.org From: Mirsad Goran Todorovac commit be37bed754ed90b2655382f93f9724b3c1aae847 upstream. Dan Carpenter spotted that test_fw_config->reqs will be leaked if trigger_batched_requests_store() is called two or more times. The same appears with trigger_batched_requests_async_store(). This bug wasn't trigger by the tests, but observed by Dan's visual inspection of the code. The recommended workaround was to return -EBUSY if test_fw_config->reqs is already allocated. Fixes: 7feebfa487b92 ("test_firmware: add support for request_firmware_into_buf") Cc: Luis Chamberlain Cc: Greg Kroah-Hartman Cc: Russ Weight Cc: Tianfei Zhang Cc: Shuah Khan Cc: Colin Ian King Cc: Randy Dunlap Cc: linux-kselftest@vger.kernel.org Cc: stable@vger.kernel.org # v5.4 Suggested-by: Dan Carpenter Suggested-by: Takashi Iwai Signed-off-by: Mirsad Goran Todorovac Reviewed-by: Dan Carpenter Acked-by: Luis Chamberlain Link: https://lore.kernel.org/r/20230509084746.48259-2-mirsad.todorovac@alu.unizg.hr Signed-off-by: Greg Kroah-Hartman Signed-off-by: Greg Kroah-Hartman --- lib/test_firmware.c | 10 ++++++++++ 1 file changed, 10 insertions(+) --- a/lib/test_firmware.c +++ b/lib/test_firmware.c @@ -894,6 +894,11 @@ static ssize_t trigger_batched_requests_ mutex_lock(&test_fw_mutex); + if (test_fw_config->reqs) { + rc = -EBUSY; + goto out_bail; + } + test_fw_config->reqs = vzalloc(array3_size(sizeof(struct test_batched_req), test_fw_config->num_requests, 2)); @@ -992,6 +997,11 @@ ssize_t trigger_batched_requests_async_s mutex_lock(&test_fw_mutex); + if (test_fw_config->reqs) { + rc = -EBUSY; + goto out_bail; + } + test_fw_config->reqs = vzalloc(array3_size(sizeof(struct test_batched_req), test_fw_config->num_requests, 2));