In the Linux kernel, the following vulnerability has been resolved: staging: vchiq_core: handle NULL result of find_service_by_handle In case of an invalid handle the function find_servive_by_handle returns NULL. So take care of this and avoid a NULL pointer dereference.
https://git.kernel.org/stable/c/ca225857faf237234d2fffe5d1919467dfadd822
https://git.kernel.org/stable/c/aa0b7296785312a4bfa8fac0ba8ad78698fd9fcf
https://git.kernel.org/stable/c/42f2142a337ee372455574809fc924580a7e51b2
https://git.kernel.org/stable/c/3b424f6586a870b8d657c5e5419465bbe0e7b61f
https://git.kernel.org/stable/c/04202f54dd8899e10f56a89c4c1ede0043fa22af