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From:   Sasha Levin <sashal@kernel.org>
To:     stable@vger.kernel.org, linux-kernel@vger.kernel.org
Cc:     Colin Ian King <colin.king@canonical.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Sasha Levin <sashal@kernel.org>
Subject: [PATCH AUTOSEL 4.19 12/68] test_firmware: fix error return getting clobbered
Date:   Thu, 29 Nov 2018 00:55:03 -0500
Message-Id: <20181129055559.159228-12-sashal@kernel.org>
In-Reply-To: <20181129055559.159228-1-sashal@kernel.org>
References: <20181129055559.159228-1-sashal@kernel.org>
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

From: Colin Ian King <colin.king@canonical.com>

[ Upstream commit 8bb0a88600f0267cfcc245d34f8c4abe8c282713 ]

In the case where eq->fw->size > PAGE_SIZE the error return rc
is being set to EINVAL however this is being overwritten to
rc = req->fw->size because the error exit path via label 'out' is
not being taken.  Fix this by adding the jump to the error exit
path 'out'.

Detected by CoverityScan, CID#1453465 ("Unused value")

Fixes: c92316bf8e94 ("test_firmware: add batched firmware tests")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 lib/test_firmware.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/test_firmware.c b/lib/test_firmware.c
index b984806d7d7b..7cab9a9869ac 100644
--- a/lib/test_firmware.c
+++ b/lib/test_firmware.c
@@ -837,6 +837,7 @@ static ssize_t read_firmware_show(struct device *dev,
 	if (req->fw->size > PAGE_SIZE) {
 		pr_err("Testing interface must use PAGE_SIZE firmware for now\n");
 		rc = -EINVAL;
+		goto out;
 	}
 	memcpy(buf, req->fw->data, req->fw->size);
 
-- 
2.17.1