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/vt8500/Kconfig | 54 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 drivers/pinctrl/vt8500/Kconfig (limited to 'drivers/pinctrl/vt8500/Kconfig') diff --git a/drivers/pinctrl/vt8500/Kconfig b/drivers/pinctrl/vt8500/Kconfig new file mode 100644 index 000000000..1a40c153a --- /dev/null +++ b/drivers/pinctrl/vt8500/Kconfig @@ -0,0 +1,54 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# VIA/Wondermedia PINCTRL drivers +# + +if ARCH_VT8500 || COMPILE_TEST + +config PINCTRL_WMT + bool + select PINMUX + select GENERIC_PINCONF + select GPIOLIB + +config PINCTRL_VT8500 + bool "VIA VT8500 pin controller driver" + depends on ARCH_WM8505 || COMPILE_TEST + select PINCTRL_WMT + help + Say yes here to support the gpio/pin control module on + VIA VT8500 SoCs. + +config PINCTRL_WM8505 + bool "Wondermedia WM8505 pin controller driver" + depends on ARCH_WM8505 || COMPILE_TEST + select PINCTRL_WMT + help + Say yes here to support the gpio/pin control module on + Wondermedia WM8505 SoCs. + +config PINCTRL_WM8650 + bool "Wondermedia WM8650 pin controller driver" + depends on ARCH_WM8505 || COMPILE_TEST + select PINCTRL_WMT + help + Say yes here to support the gpio/pin control module on + Wondermedia WM8650 SoCs. + +config PINCTRL_WM8750 + bool "Wondermedia WM8750 pin controller driver" + depends on ARCH_WM8750 || COMPILE_TEST + select PINCTRL_WMT + help + Say yes here to support the gpio/pin control module on + Wondermedia WM8750 SoCs. + +config PINCTRL_WM8850 + bool "Wondermedia WM8850 pin controller driver" + depends on ARCH_WM8850 || COMPILE_TEST + select PINCTRL_WMT + help + Say yes here to support the gpio/pin control module on + Wondermedia WM8850 SoCs. + +endif -- cgit v1.3.1