> --- a/drivers/base/core.c
> +++ b/drivers/base/core.c
> @@ -296,6 +296,9 @@ out:
> static ssize_t store_uevent(struct device *dev, struct device_attribute *attr,
> const char *buf, size_t count)
> {
> + if (memcmp(buf, "add", 3) != 0)
> + dev_err(dev, "uevent: unsupported action-string; this will "
> + "be ignored in a future kernel version");
> kobject_uevent(&dev->kobj, KOBJ_ADD);
> return count;
> }
And checking for "add" without actually checking if count >= 3 is very
ugly style indeed. Not afaict any kind of security risk as the next 3
bytes are always going to be readable
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