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/spear/Kconfig | 57 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 drivers/pinctrl/spear/Kconfig (limited to 'drivers/pinctrl/spear/Kconfig') diff --git a/drivers/pinctrl/spear/Kconfig b/drivers/pinctrl/spear/Kconfig new file mode 100644 index 000000000..98f5a84cc --- /dev/null +++ b/drivers/pinctrl/spear/Kconfig @@ -0,0 +1,57 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# ST Microelectronics SPEAr PINCTRL drivers +# + +if PLAT_SPEAR + +config PINCTRL_SPEAR + bool + depends on OF + select PINMUX + help + This enables pin control drivers for SPEAr Platform + +config PINCTRL_SPEAR3XX + bool + depends on ARCH_SPEAR3XX + select PINCTRL_SPEAR + +config PINCTRL_SPEAR300 + bool "ST Microelectronics SPEAr300 SoC pin controller driver" + depends on MACH_SPEAR300 + select PINCTRL_SPEAR3XX + +config PINCTRL_SPEAR310 + bool "ST Microelectronics SPEAr310 SoC pin controller driver" + depends on MACH_SPEAR310 + select PINCTRL_SPEAR3XX + select PINCTRL_SPEAR_PLGPIO + +config PINCTRL_SPEAR320 + bool "ST Microelectronics SPEAr320 SoC pin controller driver" + depends on MACH_SPEAR320 + select PINCTRL_SPEAR3XX + select PINCTRL_SPEAR_PLGPIO + +config PINCTRL_SPEAR1310 + bool "ST Microelectronics SPEAr1310 SoC pin controller driver" + depends on MACH_SPEAR1310 + select PINCTRL_SPEAR + select PINCTRL_SPEAR_PLGPIO + +config PINCTRL_SPEAR1340 + bool "ST Microelectronics SPEAr1340 SoC pin controller driver" + depends on MACH_SPEAR1340 + select PINCTRL_SPEAR + select PINCTRL_SPEAR_PLGPIO + +config PINCTRL_SPEAR_PLGPIO + bool "SPEAr SoC PLGPIO Controller" + depends on GPIOLIB && PINCTRL_SPEAR + select GPIOLIB_IRQCHIP + help + Say yes here to support PLGPIO controller on ST Microelectronics SPEAr + SoCs. + +endif -- cgit v1.3.1