From: David Lechner Date: Thu, 13 Sep 2018 00:48:30 +0000 (-0500) Subject: power: supply: sysfs: ratelimit property read error message X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=87a2b65fc855e6be50f791c2ebbb492541896827;p=linux.git power: supply: sysfs: ratelimit property read error message This adds rate limiting to the message that is printed when reading a power supply property via sysfs returns an error. This will prevent userspace applications from unintentionally dDOSing the system by continuously reading a property that returns an error. Signed-off-by: David Lechner Signed-off-by: Sebastian Reichel --- diff --git a/drivers/power/supply/power_supply_sysfs.c b/drivers/power/supply/power_supply_sysfs.c index 6170ed8b6854b..dce24f5961609 100644 --- a/drivers/power/supply/power_supply_sysfs.c +++ b/drivers/power/supply/power_supply_sysfs.c @@ -131,7 +131,8 @@ static ssize_t power_supply_show_property(struct device *dev, dev_dbg(dev, "driver has no data for `%s' property\n", attr->attr.name); else if (ret != -ENODEV && ret != -EAGAIN) - dev_err(dev, "driver failed to report `%s' property: %zd\n", + dev_err_ratelimited(dev, + "driver failed to report `%s' property: %zd\n", attr->attr.name, ret); return ret; }