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driver core: Limit the messages on a refused uevent

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A write to a "uevent" file which is no valid action makes
kobject_synth_uevent() print a warning and uevent_store() an error every
time.  This is generally considered a bad thing so rate limit these
messages.

Fixes: b0e37c0d8a ("net-sysfs: make sure objects belong to container's owner")
Cc: stable <stable@kernel.org>
Signed-off-by: Josef Bacik <josef@toxicpanda.com>
Link: https://patch.msgid.link/2026102718-conduit-glorious-a8dc@gregkh
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Josef Bacik 2026-10-27 18:18:19 +01:00 committed by Greg Kroah-Hartman
parent 0cc3ad8f4d
commit a01c8e5b1d
2 changed files with 6 additions and 4 deletions
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4
drivers/base/core.c
View File

@ -2847,7 +2847,9 @@ static ssize_t uevent_store(struct device *dev, const struct device_attribute *a
rc = kobject_synth_uevent(&dev->kobj, buf, count);
if (rc) {
dev_err(dev, "uevent: failed to send synthetic uevent: %d\n", rc);
dev_err_ratelimited(dev,
"uevent: failed to send synthetic uevent: %d\n",
rc);
return rc;
}

6
lib/kobject_uevent.c
View File

@ -223,9 +223,9 @@ int kobject_synth_uevent(struct kobject *kobj, const char *buf, size_t count)
out:
if (r) {
devpath = kobject_get_path(kobj, GFP_KERNEL);
pr_warn("synth uevent: %s: %s\n",
devpath ?: "unknown device",
msg ?: "failed to send uevent");
pr_warn_ratelimited("synth uevent: %s: %s\n",
devpath ?: "unknown device",
msg ?: "failed to send uevent");
kfree(devpath);
}
return r;