From 6668ed271eaefaa63e686bdfbedaeb7b8e492722 Mon Sep 17 00:00:00 2001 From: Kumar Kartikeya Dwivedi Date: Fri, 4 Sep 2026 10:43:19 +0200 Subject: selftests/bpf: Reject graph kptr use after RCU unlock Add a sleepable verifier test that loads a graph-node local kptr in an explicit RCU read-side critical section, then passes its node to bpf_rbtree_remove() after the section ends. Before the verifier fix, the stale NON_OWN_REF flag makes the node look like a live borrowed reference and the program is accepted. After the fix, the pointer is demoted without NON_OWN_REF and the graph kfunc argument is rejected. Also exercise a graph kptr loaded while a spin lock provides implicit RCU protection. The pointer must be invalidated when the lock is released, which guards the required ordering between non-owning-reference invalidation and RCU demotion. Update the existing fault-protected load test state description. The post-unlock pointer no longer carries NON_OWN_REF, but remains readable because the load is rewritten to use BPF_PROBE_MEM. Signed-off-by: Kumar Kartikeya Dwivedi Link: https://lore.kernel.org/r/20260904084325.52250-7-memxor@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/pinctrl/cirrus/Kconfig | 44 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 drivers/pinctrl/cirrus/Kconfig (limited to 'drivers/pinctrl/cirrus/Kconfig') diff --git a/drivers/pinctrl/cirrus/Kconfig b/drivers/pinctrl/cirrus/Kconfig new file mode 100644 index 000000000..e7e827a88 --- /dev/null +++ b/drivers/pinctrl/cirrus/Kconfig @@ -0,0 +1,44 @@ +# SPDX-License-Identifier: GPL-2.0-only +config PINCTRL_CS42L43 + tristate "Cirrus Logic CS42L43 Pinctrl Driver" + depends on MFD_CS42L43 + select GPIOLIB + select PINMUX + select PINCONF + select GENERIC_PINCONF + help + Select this to support the GPIO/Pinctrl functions of the Cirrus + Logic CS42L43 PC CODEC. + +config PINCTRL_LOCHNAGAR + tristate "Cirrus Logic Lochnagar pinctrl driver" + # Avoid clash caused by MIPS defining RST, which is used in the driver + depends on MFD_LOCHNAGAR && !MIPS + select GPIOLIB + select PINMUX + select PINCONF + select GENERIC_PINCONF + help + This driver supports configuring the GPIO and other pin configuration + of the Cirrus Logic Lochnagar audio development board. + +# This is all selected by the Madera MFD driver Kconfig options +config PINCTRL_MADERA + tristate + select PINMUX + select GENERIC_PINCONF + +config PINCTRL_CS47L15 + bool + +config PINCTRL_CS47L35 + bool + +config PINCTRL_CS47L85 + bool + +config PINCTRL_CS47L90 + bool + +config PINCTRL_CS47L92 + bool -- cgit v1.3.1