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 --- sound/soc/codecs/cs35l41.h | 41 +++++++++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 sound/soc/codecs/cs35l41.h (limited to 'sound/soc/codecs/cs35l41.h') diff --git a/sound/soc/codecs/cs35l41.h b/sound/soc/codecs/cs35l41.h new file mode 100644 index 000000000..c85cbc1dd --- /dev/null +++ b/sound/soc/codecs/cs35l41.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0 + * + * cs35l41.h -- CS35L41 ALSA SoC audio driver + * + * Copyright 2017-2021 Cirrus Logic, Inc. + * + * Author: David Rhodes + */ + +#ifndef __CS35L41_H__ +#define __CS35L41_H__ + +#include +#include +#include +#include +#include + +#include "wm_adsp.h" + +#define CS35L41_RX_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE) +#define CS35L41_TX_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE) + +extern const struct dev_pm_ops cs35l41_pm_ops; + +struct cs35l41_private { + struct wm_adsp dsp; /* needs to be first member */ + struct snd_soc_codec *codec; + struct cs35l41_hw_cfg hw_cfg; + struct device *dev; + struct regmap *regmap; + struct regulator_bulk_data supplies[CS35L41_NUM_SUPPLIES]; + int irq; + /* GPIO for /RST */ + struct gpio_desc *reset_gpio; +}; + +int cs35l41_probe(struct cs35l41_private *cs35l41, const struct cs35l41_hw_cfg *hw_cfg); +void cs35l41_remove(struct cs35l41_private *cs35l41); + +#endif /*__CS35L41_H__*/ -- cgit v1.3.1