From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Evgeny Novikov <novikov@ispras.ru>,
Guenter Roeck <linux@roeck-us.net>,
Sasha Levin <sashal@kernel.org>,
linux-hwmon@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-aspeed@lists.ozlabs.org
Subject: [PATCH AUTOSEL 5.4 10/34] hwmon: (aspeed-pwm-tacho) Avoid possible buffer overflow
Date: Mon, 20 Jul 2020 17:37:43 -0400 [thread overview]
Message-ID: <20200720213807.407380-10-sashal@kernel.org> (raw)
In-Reply-To: <20200720213807.407380-1-sashal@kernel.org>
From: Evgeny Novikov <novikov@ispras.ru>
[ Upstream commit bc4071aafcf4d0535ee423b69167696d6c03207d ]
aspeed_create_fan() reads a pwm_port value using of_property_read_u32().
If pwm_port will be more than ARRAY_SIZE(pwm_port_params), there will be
a buffer overflow in
aspeed_create_pwm_port()->aspeed_set_pwm_port_enable(). The patch fixes
the potential buffer overflow.
Found by Linux Driver Verification project (linuxtesting.org).
Signed-off-by: Evgeny Novikov <novikov@ispras.ru>
Link: https://lore.kernel.org/r/20200703111518.9644-1-novikov@ispras.ru
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/hwmon/aspeed-pwm-tacho.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/hwmon/aspeed-pwm-tacho.c b/drivers/hwmon/aspeed-pwm-tacho.c
index 40c489be62eaa..40f3139f1e028 100644
--- a/drivers/hwmon/aspeed-pwm-tacho.c
+++ b/drivers/hwmon/aspeed-pwm-tacho.c
@@ -851,6 +851,8 @@ static int aspeed_create_fan(struct device *dev,
ret = of_property_read_u32(child, "reg", &pwm_port);
if (ret)
return ret;
+ if (pwm_port >= ARRAY_SIZE(pwm_port_params))
+ return -EINVAL;
aspeed_create_pwm_port(priv, (u8)pwm_port);
ret = of_property_count_u8_elems(child, "cooling-levels");
--
2.25.1
next parent reply other threads:[~2020-07-20 21:38 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200720213807.407380-1-sashal@kernel.org>
2020-07-20 21:37 ` Sasha Levin [this message]
2020-07-20 21:37 ` [PATCH AUTOSEL 5.4 20/34] hwmon: (adm1275) Make sure we are reading enough data for different chips Sasha Levin
2020-07-20 21:37 ` [PATCH AUTOSEL 5.4 23/34] hwmon: (nct6775) Accept PECI Calibration as temperature source for NCT6798D Sasha Levin
2020-07-20 21:37 ` [PATCH AUTOSEL 5.4 26/34] hwmon: (scmi) Fix potential buffer overflow in scmi_hwmon_probe() Sasha Levin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200720213807.407380-10-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-aspeed@lists.ozlabs.org \
--cc=linux-hwmon@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@roeck-us.net \
--cc=novikov@ispras.ru \
--cc=stable@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).