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/sunplus/Kconfig | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) create mode 100644 drivers/pinctrl/sunplus/Kconfig (limited to 'drivers/pinctrl/sunplus/Kconfig') diff --git a/drivers/pinctrl/sunplus/Kconfig b/drivers/pinctrl/sunplus/Kconfig new file mode 100644 index 000000000..69f82590f --- /dev/null +++ b/drivers/pinctrl/sunplus/Kconfig @@ -0,0 +1,21 @@ +# SPDX-License-Identifier: GPL-2.0 +# +# Sunplus Pin control driver configuration +# + +config PINCTRL_SPPCTL + tristate "Sunplus SP7021 PinMux and GPIO driver" + depends on SOC_SP7021 + depends on OF && HAS_IOMEM + select GENERIC_PINCTRL_GROUPS + select GENERIC_PINMUX_FUNCTIONS + select GENERIC_PINCONF + select PINCONF + select PINMUX + select GPIOLIB + help + Say Y here to support Sunplus SP7021 pinmux controller. + This driver requires the pinctrl framework. + GPIO is provided by the same driver. + To compile this driver as a module, choose M here. + The module will be called sppinctrl. -- cgit v1.3.1