CVE-2026-93145

Summary

In the Linux kernel, the following vulnerability has been resolved:

clk: qcom: gdsc: tear down per-domain genpds in gdsc_unregister()

gdsc_unregister() removes the OF provider entry and tears down the parent/subdomain wiring, but never calls pm_genpd_remove() on the individual generic_pm_domain structures registered by gdsc_init():

void gdsc_unregister(struct gdsc_desc *desc)
{
	struct device *dev = desc->dev;
	size_t num = desc->num;

	gdsc_pm_subdomain_remove(desc, num);
	of_genpd_del_provider(dev->of_node);
}

That leaves dangling entries on the global gpd_list. After a provider unbind/rebind cycle (deferred-probe replay during early boot, real module unload of a clk driver that owns GDSCs, or an OF-overlay tear- down) the next gdsc_init() will end up trying to re-register a name that is still in the list and pm_genpd_init() returns -EEXIST.

While we are here, flip the order so the consumer-facing OF provider entry is the first thing removed – otherwise a fresh of_genpd_get_from_provider() call racing with the teardown could attach to a domain that is mid-removal.

Iterate the scs[] array and pm_genpd_remove() each registered domain after the subdomain links are torn down. The regulators stay devm- managed (devm_regulator_get_optional() in gdsc_register()), so the release happens automatically when the underlying device is unbound; just the genpd accounting needs to be undone explicitly.

Affected Software

Weaknesses

References

• https://git.kernel.org/stable/c/418d2f0a32b2a9ceb656a88aa9139408a9b7b517
• https://git.kernel.org/stable/c/6333cbf7e86df9797b342ce64ae7d32ba46d8d10
• https://git.kernel.org/stable/c/cfe16d993c578f6b17e0171a8dfd68f6fdfcfb24
• https://git.kernel.org/stable/c/0f4733f5fc6b6b62750619f30c18730922a1dbdb
• https://git.kernel.org/stable/c/6b9228a43963bcd4db92deb467375345132c29b3
• https://git.kernel.org/stable/c/f60f495858379dc70e87c6898d761a9db98739ff
• https://git.kernel.org/stable/c/40bd77fa2857ccfa77b885b77d44cea406f24a4c
• https://git.kernel.org/stable/c/86b23609d5e17a770d03037e53c6a443e742a6e6

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