CVE-2022-48708

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

pinctrl: single: fix potential NULL dereference

Added checking of pointer "function" in pcs_set_mux().
pinmux_generic_get_function() can return NULL and the pointer
"function" was dereferenced without checking against NULL.

Found by Linux Verification Center (linuxtesting.org) with SVACE.