linux-kernel - [PATCH 1/2] hte: fix off by one in hte_push_ts

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Message-ID: <YnU2gHe+QZOAuNyV@kili>
Date:   Fri, 6 May 2022 17:53:52 +0300
From:   Dan Carpenter <dan.carpenter@...cle.com>
To:     Dipen Patel <dipenp@...dia.com>
Cc:     Thierry Reding <treding@...dia.com>, linux-kernel@...r.kernel.org,
        kernel-janitors@...r.kernel.org
Subject: [PATCH 1/2] hte: fix off by one in hte_push_ts_ns()

The &chip->gdev->ei[] array has chip->nlines elements so this >
comparison needs to be >= to prevent an out of bounds access. The
gdev->ei[] array is allocated in hte_register_chip().

Fixes: 31ab09b42188 ("drivers: Add hardware timestamp engine (HTE) subsystem")
Signed-off-by: Dan Carpenter <dan.carpenter@...cle.com>
---
 drivers/hte/hte.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/hte/hte.c b/drivers/hte/hte.c
index 891b98ad609e..a14c5bf290ff 100644
--- a/drivers/hte/hte.c
+++ b/drivers/hte/hte.c
@@ -811,7 +811,7 @@ int hte_push_ts_ns(const struct hte_chip *chip, u32 xlated_id,
 	if (!chip || !data || !chip->gdev)
 		return -EINVAL;
 
-	if (xlated_id > chip->nlines)
+	if (xlated_id >= chip->nlines)
 		return -EINVAL;
 
 	ei = &chip->gdev->ei[xlated_id];
-- 
2.35.1