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Message-Id: <20230113133320.7531-1-abelova@astralinux.ru>
Date: Fri, 13 Jan 2023 16:33:20 +0300
From: Anastasia Belova <abelova@...ralinux.ru>
To: Tomasz Duszynski <tomasz.duszynski@...akon.com>
Cc: Anastasia Belova <abelova@...ralinux.ru>,
Jonathan Cameron <jic23@...nel.org>,
Lars-Peter Clausen <lars@...afoo.de>,
Andy Shevchenko <andy.shevchenko@...il.com>,
linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org,
lvc-project@...uxtesting.org
Subject: [PATCH] iio: chemical: scd30: Add check for NULL in scd30_i2c_command
Check rsp for NULL-pointer before dereferencing.
Found by Linux Verification Center (linuxtesting.org) with SVACE.
Fixes: e510190e0139 ("iio: chemical: scd30: add I2C interface driver")
Signed-off-by: Anastasia Belova <abelova@...ralinux.ru>
---
drivers/iio/chemical/scd30_i2c.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/iio/chemical/scd30_i2c.c b/drivers/iio/chemical/scd30_i2c.c
index bae479a4721f..84baf67fc0ce 100644
--- a/drivers/iio/chemical/scd30_i2c.c
+++ b/drivers/iio/chemical/scd30_i2c.c
@@ -101,8 +101,10 @@ static int scd30_i2c_command(struct scd30_state *state, enum scd30_cmd cmd, u16
return -EIO;
}
- *rsp++ = buf[i];
- *rsp++ = buf[i + 1];
+ if (rsp) {
+ *rsp++ = buf[i];
+ *rsp++ = buf[i + 1];
+ }
}
return 0;
--
2.30.2
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