linux-kernel - [PATCH][next] soc: qcom: fix off-by-one array index bounds check

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Message-Id: <20200624140516.5929-1-colin.king@canonical.com>
Date:   Wed, 24 Jun 2020 15:05:16 +0100
From:   Colin King <colin.king@...onical.com>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <bjorn.andersson@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-arm-msm@...r.kernel.org
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH][next] soc: qcom: fix off-by-one array index bounds check

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

The bounds check on model is off-by-one, leading to an array out
of bounds read when model is 26. Fix this.

Addresses-Coverity: ("Out-of-bounds read")
Fixes: e9247e2ce577 ("soc: qcom: socinfo: fix printing of pmic_model")
Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 drivers/soc/qcom/socinfo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/soc/qcom/socinfo.c b/drivers/soc/qcom/socinfo.c
index e19102f46302..4d29ea244e71 100644
--- a/drivers/soc/qcom/socinfo.c
+++ b/drivers/soc/qcom/socinfo.c
@@ -275,7 +275,7 @@ static int qcom_show_pmic_model(struct seq_file *seq, void *p)
 	if (model < 0)
 		return -EINVAL;
 
-	if (model <= ARRAY_SIZE(pmic_models) && pmic_models[model])
+	if (model < ARRAY_SIZE(pmic_models) && pmic_models[model])
 		seq_printf(seq, "%s\n", pmic_models[model]);
 	else
 		seq_printf(seq, "unknown (%d)\n", model);
-- 
2.27.0