From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 61B0CBE4B for ; Mon, 19 Jun 2023 10:50:39 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id B2BFDC433C8; Mon, 19 Jun 2023 10:50:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1687171839; bh=gzdujEU3/hRV6Pr8z9XYs+gz9JZAg2D18OESNsKRvIY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=t218jkCYiu77x+TGYq/o+VYEZdyZhFO5ECml4ka9BnNy2rDZw8ZU9QUIwft9cqAKb jL2Mb6Msa8oB9DdFE45ua16BMWdKwyGyPZ3yF9dENxKshjxAs18Bu4kSAxt/34Pxx9 ZT0o9GxP2m3Mx0O1eR+1JcMoyEBJ1huHajbnMQCc= 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 5.4 01/64] test_firmware: fix a memory leak with reqs buffer Date: Mon, 19 Jun 2023 12:29:57 +0200 Message-ID: <20230619102132.877724157@linuxfoundation.org> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230619102132.808972458@linuxfoundation.org> References: <20230619102132.808972458@linuxfoundation.org> User-Agent: quilt/0.67 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 3146845f01562..38553944e9675 100644 --- a/lib/test_firmware.c +++ b/lib/test_firmware.c @@ -679,6 +679,11 @@ 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)); @@ -778,6 +783,11 @@ 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)); -- 2.39.2