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/clk/actions/owl-reset.h | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 drivers/clk/actions/owl-reset.h (limited to 'drivers/clk/actions/owl-reset.h') diff --git a/drivers/clk/actions/owl-reset.h b/drivers/clk/actions/owl-reset.h new file mode 100644 index 000000000..a947ffcb5 --- /dev/null +++ b/drivers/clk/actions/owl-reset.h @@ -0,0 +1,31 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +// +// Actions Semi Owl SoCs Reset Management Unit driver +// +// Copyright (c) 2018 Linaro Ltd. +// Author: Manivannan Sadhasivam + +#ifndef _OWL_RESET_H_ +#define _OWL_RESET_H_ + +#include + +struct owl_reset_map { + u32 reg; + u32 bit; +}; + +struct owl_reset { + struct reset_controller_dev rcdev; + const struct owl_reset_map *reset_map; + struct regmap *regmap; +}; + +static inline struct owl_reset *to_owl_reset(struct reset_controller_dev *rcdev) +{ + return container_of(rcdev, struct owl_reset, rcdev); +} + +extern const struct reset_control_ops owl_reset_ops; + +#endif /* _OWL_RESET_H_ */ -- cgit v1.3.1