From: Dan Carpenter <dan.carpenter@oracle.com>
To: "Rafael J. Wysocki" <rjw@rjwysocki.net>
Cc: Len Brown <len.brown@intel.com>, Pavel Machek <pavel@ucw.cz>,
Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
linux-pm@vger.kernel.org, kernel-janitors@vger.kernel.org
Subject: [PATCH] PM / sysfs: return -EINVAL for bogus strings
Date: Mon, 10 Jul 2017 07:21:40 +0000 [thread overview]
Message-ID: <20170710072140.chms22ep35myvvbd@mwanda> (raw)
In the current code, if the user accidentally writes a bogus command to
this sysfs file, then we set the latency tolerance to an uninitialized
variable.
Fixes: 2d984ad132a8 ("PM / QoS: Introcuce latency tolerance device PM QoS type")
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
diff --git a/drivers/base/power/sysfs.c b/drivers/base/power/sysfs.c
index 185a52581cfa..156ab57bca77 100644
--- a/drivers/base/power/sysfs.c
+++ b/drivers/base/power/sysfs.c
@@ -272,6 +272,8 @@ static ssize_t pm_qos_latency_tolerance_store(struct device *dev,
value = PM_QOS_LATENCY_TOLERANCE_NO_CONSTRAINT;
else if (!strcmp(buf, "any") || !strcmp(buf, "any\n"))
value = PM_QOS_LATENCY_ANY;
+ else
+ return -EINVAL;
}
ret = dev_pm_qos_update_user_latency_tolerance(dev, value);
return ret < 0 ? ret : n;
next reply other threads:[~2017-07-10 7:21 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-07-10 7:21 Dan Carpenter [this message]
2017-07-10 7:29 ` [PATCH] PM / sysfs: return -EINVAL for bogus strings Pavel Machek
2017-07-12 21:35 ` Rafael J. Wysocki
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