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From:   Azeem Shaikh <azeemshaikh38@gmail.com>
To:     Jan-Simon Moeller <jansimon.moeller@gmx.de>
Cc:     linux-hardening@vger.kernel.org,
        Azeem Shaikh <azeemshaikh38@gmail.com>,
        linux-kernel@vger.kernel.org, Pavel Machek <pavel@ucw.cz>,
        Lee Jones <lee@kernel.org>, linux-leds@vger.kernel.org
Subject: [PATCH] leds: blinkm: Replace all non-returning strlcpy with strscpy
Date:   Tue, 23 May 2023 02:12:28 +0000
Message-ID: <20230523021228.2406112-1-azeemshaikh38@gmail.com>
MIME-Version: 1.0
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Precedence: bulk

strlcpy() reads the entire source buffer first.
This read may exceed the destination size limit.
This is both inefficient and can lead to linear read
overflows if a source string is not NUL-terminated [1].
In an effort to remove strlcpy() completely [2], replace
strlcpy() here with strscpy().
No return values were used, so direct replacement is safe.

[1] https://www.kernel.org/doc/html/latest/process/deprecated.html#strlcpy
[2] https://github.com/KSPP/linux/issues/89

Signed-off-by: Azeem Shaikh <azeemshaikh38@gmail.com>
---
 drivers/leds/leds-blinkm.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/leds/leds-blinkm.c b/drivers/leds/leds-blinkm.c
index 37f2f32ae42d..8c2ae0798cfc 100644
--- a/drivers/leds/leds-blinkm.c
+++ b/drivers/leds/leds-blinkm.c
@@ -561,7 +561,7 @@ static int blinkm_detect(struct i2c_client *client, struct i2c_board_info *info)
 		return -ENODEV;
 	}
 
-	strlcpy(info->type, "blinkm", I2C_NAME_SIZE);
+	strscpy(info->type, "blinkm", I2C_NAME_SIZE);
 	return 0;
 }