From: Guenter Roeck <linux@roeck-us.net> To: Evgeny Novikov <novikov@ispras.ru> Cc: Jean Delvare <jdelvare@suse.com>, 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: Re: [PATCH] hwmon: (aspeed-pwm-tacho) Avoid possible buffer overflow Date: Fri, 3 Jul 2020 15:17:44 -0700 [thread overview] Message-ID: <20200703221744.GA34644@roeck-us.net> (raw) In-Reply-To: <20200703111518.9644-1-novikov@ispras.ru> On Fri, Jul 03, 2020 at 02:15:18PM +0300, Evgeny Novikov wrote: > 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> Applied. Thanks, Guenter > --- > 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");
WARNING: multiple messages have this Message-ID (diff)
From: Guenter Roeck <linux@roeck-us.net> To: Evgeny Novikov <novikov@ispras.ru> Cc: linux-hwmon@vger.kernel.org, ldv-project@linuxtesting.org, Jean Delvare <jdelvare@suse.com>, linux-aspeed@lists.ozlabs.org, Andrew Jeffery <andrew@aj.id.au>, linux-kernel@vger.kernel.org, Joel Stanley <joel@jms.id.au>, linux-arm-kernel@lists.infradead.org Subject: Re: [PATCH] hwmon: (aspeed-pwm-tacho) Avoid possible buffer overflow Date: Fri, 3 Jul 2020 15:17:44 -0700 [thread overview] Message-ID: <20200703221744.GA34644@roeck-us.net> (raw) In-Reply-To: <20200703111518.9644-1-novikov@ispras.ru> On Fri, Jul 03, 2020 at 02:15:18PM +0300, Evgeny Novikov wrote: > 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> Applied. Thanks, Guenter > --- > 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"); _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-07-03 22:17 UTC|newest] Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-07-03 11:15 [PATCH] hwmon: (aspeed-pwm-tacho) Avoid possible buffer overflow Evgeny Novikov 2020-07-03 11:15 ` Evgeny Novikov 2020-07-03 22:17 ` Guenter Roeck [this message] 2020-07-03 22:17 ` Guenter Roeck
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=20200703221744.GA34644@roeck-us.net \ --to=linux@roeck-us.net \ --cc=andrew@aj.id.au \ --cc=jdelvare@suse.com \ --cc=joel@jms.id.au \ --cc=ldv-project@linuxtesting.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=novikov@ispras.ru \ /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: linkBe sure your reply has a Subject: header at the top and a blank line before the message body.
This is an external index of several public inboxes, see mirroring instructions on how to clone and mirror all data and code used by this external index.