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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Srinivas Kandagatla <srinivas.kandagatla@linaro.org>,
        Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
        Vinod Koul <vkoul@kernel.org>, Sasha Levin <sashal@kernel.org>
Subject: [PATCH 5.1 017/138] soundwire: stream: fix out of boundary access on port properties
Date:   Fri, 12 Jul 2019 14:18:01 +0200
Message-Id: <20190712121629.380616400@linuxfoundation.org>
In-Reply-To: <20190712121628.731888964@linuxfoundation.org>
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[ Upstream commit 03ecad90d3798be11b033248bbd4bbff4425a1c7 ]

Assigning local iterator to array element and using it again for
indexing would cross the array boundary.
Fix this by directly referring array element without using the local
variable.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Signed-off-by: Vinod Koul <vkoul@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
 drivers/soundwire/stream.c | 4 +---
 1 file changed, 1 insertion(+), 3 deletions(-)

diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c
index bd879b1a76c8..00618de2ee12 100644
--- a/drivers/soundwire/stream.c
+++ b/drivers/soundwire/stream.c
@@ -1401,9 +1401,7 @@ struct sdw_dpn_prop *sdw_get_slave_dpn_prop(struct sdw_slave *slave,
 	}
 
 	for (i = 0; i < num_ports; i++) {
-		dpn_prop = &dpn_prop[i];
-
-		if (dpn_prop->num == port_num)
+		if (dpn_prop[i].num == port_num)
 			return &dpn_prop[i];
 	}
 
-- 
2.20.1