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/intel/Kconfig.tng | 33 +++++++++++++++++++++++++++++++++ 1 file changed, 33 insertions(+) create mode 100644 drivers/pinctrl/intel/Kconfig.tng (limited to 'drivers/pinctrl/intel/Kconfig.tng') diff --git a/drivers/pinctrl/intel/Kconfig.tng b/drivers/pinctrl/intel/Kconfig.tng new file mode 100644 index 000000000..6f88a64d2 --- /dev/null +++ b/drivers/pinctrl/intel/Kconfig.tng @@ -0,0 +1,33 @@ +# SPDX-License-Identifier: GPL-2.0-only +# Intel Tangier and compatible pin control drivers + +if X86_INTEL_MID || COMPILE_TEST + +config PINCTRL_TANGIER + tristate + select PINMUX + select PINCONF + select GENERIC_PINCONF + help + This is a library driver for Intel Tangier pin controller and to + be selected and used by respective compatible platform drivers. + + If built as a module its name will be pinctrl-tangier. + +config PINCTRL_MERRIFIELD + tristate "Intel Merrifield pinctrl driver" + select PINCTRL_TANGIER + help + Intel Merrifield Family-Level Interface Shim (FLIS) driver provides + an interface that allows configuring of SoC pins and using them as + GPIOs. + +config PINCTRL_MOOREFIELD + tristate "Intel Moorefield pinctrl driver" + select PINCTRL_TANGIER + help + Intel Moorefield Family-Level Interface Shim (FLIS) driver provides + an interface that allows configuring of SoC pins and using them as + GPIOs. + +endif -- cgit v1.3.1