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-common.h | 44 ++++++++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) create mode 100644 drivers/clk/actions/owl-common.h (limited to 'drivers/clk/actions/owl-common.h') diff --git a/drivers/clk/actions/owl-common.h b/drivers/clk/actions/owl-common.h new file mode 100644 index 000000000..5768a2e0f --- /dev/null +++ b/drivers/clk/actions/owl-common.h @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +// +// OWL common clock driver +// +// Copyright (c) 2014 Actions Semi Inc. +// Author: David Liu +// +// Copyright (c) 2018 Linaro Ltd. +// Author: Manivannan Sadhasivam + +#ifndef _OWL_COMMON_H_ +#define _OWL_COMMON_H_ + +#include +#include + +struct device_node; +struct platform_device; + +struct owl_clk_common { + struct regmap *regmap; + struct clk_hw hw; +}; + +struct owl_clk_desc { + struct owl_clk_common **clks; + unsigned long num_clks; + struct clk_hw_onecell_data *hw_clks; + const struct owl_reset_map *resets; + unsigned long num_resets; + struct regmap *regmap; +}; + +static inline struct owl_clk_common * + hw_to_owl_clk_common(struct clk_hw *hw) +{ + return container_of(hw, struct owl_clk_common, hw); +} + +int owl_clk_regmap_init(struct platform_device *pdev, + struct owl_clk_desc *desc); +int owl_clk_probe(struct device *dev, struct clk_hw_onecell_data *hw_clks); + +#endif /* _OWL_COMMON_H_ */ -- cgit v1.3.1