linux-kernel - [PATCH 4.18 080/228] ASoC: qdsp6: qdafe: fix some off by one bugs

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Date:   Tue,  2 Oct 2018 06:22:57 -0700
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Dan Carpenter <dan.carpenter@...cle.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <alexander.levin@...rosoft.com>
Subject: [PATCH 4.18 080/228] ASoC: qdsp6: qdafe: fix some off by one bugs

4.18-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Dan Carpenter <dan.carpenter@...cle.com>

[ Upstream commit c54c1c5ee8e73b7cb752834e52e2129b1dab00bd ]

The > should be >= or we could read one element beyond the end of the
port_maps[] array.

Fixes: 7fa2d70f9766 ("ASoC: qdsp6: q6afe: Add q6afe driver")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <alexander.levin@...rosoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
---
 sound/soc/qcom/qdsp6/q6afe.c |    6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

--- a/sound/soc/qcom/qdsp6/q6afe.c
+++ b/sound/soc/qcom/qdsp6/q6afe.c
@@ -777,7 +777,7 @@ static int q6afe_callback(struct apr_dev
  */
 int q6afe_get_port_id(int index)
 {
-	if (index < 0 || index > AFE_PORT_MAX)
+	if (index < 0 || index >= AFE_PORT_MAX)
 		return -EINVAL;
 
 	return port_maps[index].port_id;
@@ -1014,7 +1014,7 @@ int q6afe_port_stop(struct q6afe_port *p
 
 	port_id = port->id;
 	index = port->token;
-	if (index < 0 || index > AFE_PORT_MAX) {
+	if (index < 0 || index >= AFE_PORT_MAX) {
 		dev_err(afe->dev, "AFE port index[%d] invalid!\n", index);
 		return -EINVAL;
 	}
@@ -1355,7 +1355,7 @@ struct q6afe_port *q6afe_port_get_from_i
 	unsigned long flags;
 	int cfg_type;
 
-	if (id < 0 || id > AFE_PORT_MAX) {
+	if (id < 0 || id >= AFE_PORT_MAX) {
 		dev_err(dev, "AFE port token[%d] invalid!\n", id);
 		return ERR_PTR(-EINVAL);
 	}