From patchwork Mon Jun 19 10:29:53 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "gregkh@linuxfoundation.org" X-Patchwork-Id: 694334 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 1997FEB64D9 for ; Mon, 19 Jun 2023 10:57:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232378AbjFSK5D (ORCPT ); Mon, 19 Jun 2023 06:57:03 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:58142 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232385AbjFSK4m (ORCPT ); Mon, 19 Jun 2023 06:56:42 -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 BB94D210E; Mon, 19 Jun 2023 03:54:44 -0700 (PDT) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits)) (No client certificate requested) by dfw.source.kernel.org (Postfix) with ESMTPS id 396C660B78; Mon, 19 Jun 2023 10:54:44 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 208A0C433C0; Mon, 19 Jun 2023 10:54:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687172083; bh=KmwBy9bTbYC04qR9IUTzUnIjy/kGHlQz3/j/b4hP76A=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=FLsogHvzTijPEkhj5U9252PgV5yRtFlYrevdN7Vqjya6z7YWO+tyMLSlGjFIm4Ai6 +rPHFDWQh6aw1eK636/h10i3nPM4aAjYD0pVYP5SAJfrZ2fY6zNDZ6j/Q/DxQv7ImZ Rh1DBCNY/hf4Ehj+M9Ko1QgGMR0T0KoeQwkZz1a8= 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 , Sasha Levin Subject: [PATCH 5.10 05/89] test_firmware: fix a memory leak with reqs buffer Date: Mon, 19 Jun 2023 12:29:53 +0200 Message-ID: <20230619102138.534563685@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230619102138.279161276@linuxfoundation.org> References: <20230619102138.279161276@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 [ Upstream commit be37bed754ed90b2655382f93f9724b3c1aae847 ] 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: Sasha Levin --- lib/test_firmware.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/lib/test_firmware.c b/lib/test_firmware.c index 4884057eb53f0..ed0455a9ded87 100644 --- a/lib/test_firmware.c +++ b/lib/test_firmware.c @@ -863,6 +863,11 @@ static ssize_t trigger_batched_requests_store(struct device *dev, 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)); @@ -962,6 +967,11 @@ ssize_t trigger_batched_requests_async_store(struct device *dev, 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));