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/spacemit/Kconfig | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 drivers/pinctrl/spacemit/Kconfig (limited to 'drivers/pinctrl/spacemit/Kconfig') diff --git a/drivers/pinctrl/spacemit/Kconfig b/drivers/pinctrl/spacemit/Kconfig new file mode 100644 index 000000000..b2365deff --- /dev/null +++ b/drivers/pinctrl/spacemit/Kconfig @@ -0,0 +1,16 @@ +# SPDX-License-Identifier: GPL-2.0-only +# +# Sophgo SoC PINCTRL drivers +# + +config PINCTRL_SPACEMIT_K1 + bool "SpacemiT K1/K3 SoC Pinctrl driver" + depends on ARCH_SPACEMIT || COMPILE_TEST + depends on OF + default ARCH_SPACEMIT + select GENERIC_PINCTRL + help + Say Y to select the pinctrl driver for K1/K3 SoC. + This pin controller allows selecting the mux function for + each pin. This driver can also be built as a module called + pinctrl-k1. -- cgit v1.3.1