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/mediatek/pinctrl-mtmips.h | 53 +++++++++++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 drivers/pinctrl/mediatek/pinctrl-mtmips.h (limited to 'drivers/pinctrl/mediatek/pinctrl-mtmips.h') diff --git a/drivers/pinctrl/mediatek/pinctrl-mtmips.h b/drivers/pinctrl/mediatek/pinctrl-mtmips.h new file mode 100644 index 000000000..a7c3dd724 --- /dev/null +++ b/drivers/pinctrl/mediatek/pinctrl-mtmips.h @@ -0,0 +1,53 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Copyright (C) 2012 John Crispin + */ + +#ifndef _PINCTRL_MTMIPS_H__ +#define _PINCTRL_MTMIPS_H__ + +#define FUNC(name, value, pin_first, pin_count) \ + { name, value, pin_first, pin_count } + +#define GRP(_name, _func, _mask, _shift) \ + { .name = _name, .mask = _mask, .shift = _shift, \ + .func = _func, .gpio = _mask, \ + .func_count = ARRAY_SIZE(_func) } + +#define GRP_G(_name, _func, _mask, _gpio, _shift) \ + { .name = _name, .mask = _mask, .shift = _shift, \ + .func = _func, .gpio = _gpio, \ + .func_count = ARRAY_SIZE(_func) } + +struct mtmips_pmx_group; + +struct mtmips_pmx_func { + const char *name; + const char value; + + int pin_first; + int pin_count; + int *pins; + + int *groups; + int group_count; + + int enabled; +}; + +struct mtmips_pmx_group { + const char *name; + int enabled; + + const u32 shift; + const char mask; + const char gpio; + + struct mtmips_pmx_func *func; + int func_count; +}; + +int mtmips_pinctrl_init(struct platform_device *pdev, + struct mtmips_pmx_group *data); + +#endif -- cgit v1.3.1