From: Evgeny Novikov <novikov@ispras.ru> To: Jean Delvare <jdelvare@suse.com> Cc: Evgeny Novikov <novikov@ispras.ru>, Guenter Roeck <linux@roeck-us.net>, Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>, linux-hwmon@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-aspeed@lists.ozlabs.org, linux-kernel@vger.kernel.org, ldv-project@linuxtesting.org Subject: [PATCH] hwmon: (aspeed-pwm-tacho) Avoid possible buffer overflow Date: Fri, 3 Jul 2020 14:15:18 +0300 [thread overview] Message-ID: <20200703111518.9644-1-novikov@ispras.ru> (raw) 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> --- 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 33fb54845bf6..3d8239fd66ed 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"); -- 2.16.4
WARNING: multiple messages have this Message-ID (diff)
From: Evgeny Novikov <novikov@ispras.ru> To: Jean Delvare <jdelvare@suse.com> Cc: linux-hwmon@vger.kernel.org, ldv-project@linuxtesting.org, linux-aspeed@lists.ozlabs.org, Evgeny Novikov <novikov@ispras.ru>, linux-kernel@vger.kernel.org, Andrew Jeffery <andrew@aj.id.au>, Joel Stanley <joel@jms.id.au>, Guenter Roeck <linux@roeck-us.net>, linux-arm-kernel@lists.infradead.org Subject: [PATCH] hwmon: (aspeed-pwm-tacho) Avoid possible buffer overflow Date: Fri, 3 Jul 2020 14:15:18 +0300 [thread overview] Message-ID: <20200703111518.9644-1-novikov@ispras.ru> (raw) 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> --- 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 33fb54845bf6..3d8239fd66ed 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"); -- 2.16.4 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next reply other threads:[~2020-07-03 11:15 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-03 11:15 Evgeny Novikov [this message] 2020-07-03 11:15 ` [PATCH] hwmon: (aspeed-pwm-tacho) Avoid possible buffer overflow Evgeny Novikov 2020-07-03 22:17 ` Guenter Roeck 2020-07-03 22:17 ` Guenter Roeck
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