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/starfive/Kconfig | 49 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 49 insertions(+) create mode 100644 drivers/pinctrl/starfive/Kconfig (limited to 'drivers/pinctrl/starfive/Kconfig') diff --git a/drivers/pinctrl/starfive/Kconfig b/drivers/pinctrl/starfive/Kconfig new file mode 100644 index 000000000..a9a7cb101 --- /dev/null +++ b/drivers/pinctrl/starfive/Kconfig @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: GPL-2.0-only + +config PINCTRL_STARFIVE_JH7100 + tristate "Pinctrl and GPIO driver for the StarFive JH7100 SoC" + depends on SOC_STARFIVE || COMPILE_TEST + depends on OF + select GENERIC_PINCTRL_GROUPS + select GENERIC_PINMUX_FUNCTIONS + select GENERIC_PINCONF + select GPIOLIB + select GPIOLIB_IRQCHIP + default SOC_STARFIVE + help + Say yes here to support pin control on the StarFive JH7100 SoC. + This also provides an interface to the GPIO pins not used by other + peripherals supporting inputs, outputs, configuring pull-up/pull-down + and interrupts on input changes. + +config PINCTRL_STARFIVE_JH7110 + bool + select GENERIC_PINCTRL_GROUPS + select GENERIC_PINMUX_FUNCTIONS + select GENERIC_PINCONF + select GPIOLIB + select GPIOLIB_IRQCHIP + +config PINCTRL_STARFIVE_JH7110_SYS + tristate "System pinctrl and GPIO driver for the StarFive JH7110 SoC" + depends on SOC_STARFIVE || COMPILE_TEST + depends on OF + select PINCTRL_STARFIVE_JH7110 + default SOC_STARFIVE + help + Say yes here to support system pin control on the StarFive JH7110 SoC. + This also provides an interface to the GPIO pins not used by other + peripherals supporting inputs, outputs, configuring pull-up/pull-down + and interrupts on input changes. + +config PINCTRL_STARFIVE_JH7110_AON + tristate "Always-on pinctrl and GPIO driver for the StarFive JH7110 SoC" + depends on SOC_STARFIVE || COMPILE_TEST + depends on OF + select PINCTRL_STARFIVE_JH7110 + default SOC_STARFIVE + help + Say yes here to support always-on pin control on the StarFive JH7110 SoC. + This also provides an interface to the GPIO pins not used by other + peripherals supporting inputs, outputs, configuring pull-up/pull-down + and interrupts on input changes. -- cgit v1.3.1