CVE-2026-90340pinctrl: generic: free maps on pinctrl_generic_to_map() failure

Official description

In the Linux kernel, the following vulnerability has been resolved: pinctrl: generic: free maps on pinctrl_generic_to_map() failure pinctrl_generic_to_map() parses DT configuration and allocates pinctrl maps via pinctrl_utils_reserve_map(). If subsequent steps (such as pinctrl_utils_add_map_mux(), pinctrl_generic_add_group(), pinconf_generic_parse_dt_config(), or pinctrl_utils_add_map_configs()) return an error, *maps may contain partially allocated map entries. Returning the error directly without freeing *maps leaks the allocated mapping memory across all drivers that rely on pinctrl_generic_to_map(). Fix this by calling pinctrl_utils_free_map() and resetting *maps, *num_maps, and *num_reserved_maps in the error path of pinctrl_generic_to_map().

Affected packages & fixed versions

Affected products (as reported)

References

• https://git.kernel.org/stable/c/09f47abc95ee9e819e7e93cd68c1c23abe11c842
• https://git.kernel.org/stable/c/17007cd700601777d9ee203a13d97e64ece3a10f