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/rt1316-sdw.h | 52 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) create mode 100644 sound/soc/codecs/rt1316-sdw.h (limited to 'sound/soc/codecs/rt1316-sdw.h') diff --git a/sound/soc/codecs/rt1316-sdw.h b/sound/soc/codecs/rt1316-sdw.h new file mode 100644 index 000000000..dc1bfe40e --- /dev/null +++ b/sound/soc/codecs/rt1316-sdw.h @@ -0,0 +1,52 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * rt1316-sdw.h -- RT1316 SDCA ALSA SoC audio driver header + * + * Copyright(c) 2021 Realtek Semiconductor Corp. + */ + +#ifndef __RT1316_SDW_H__ +#define __RT1316_SDW_H__ + +#include +#include +#include +#include +#include + +/* RT1316 SDCA Control - function number */ +#define FUNC_NUM_SMART_AMP 0x04 + +/* RT1316 SDCA entity */ +#define RT1316_SDCA_ENT_PDE23 0x31 +#define RT1316_SDCA_ENT_PDE27 0x32 +#define RT1316_SDCA_ENT_PDE22 0x33 +#define RT1316_SDCA_ENT_PDE24 0x34 +#define RT1316_SDCA_ENT_XU24 0x24 +#define RT1316_SDCA_ENT_FU21 0x03 +#define RT1316_SDCA_ENT_UDMPU21 0x02 + +/* RT1316 SDCA control */ +#define RT1316_SDCA_CTL_SAMPLE_FREQ_INDEX 0x10 +#define RT1316_SDCA_CTL_REQ_POWER_STATE 0x01 +#define RT1316_SDCA_CTL_BYPASS 0x01 +#define RT1316_SDCA_CTL_FU_MUTE 0x01 +#define RT1316_SDCA_CTL_FU_VOLUME 0x02 +#define RT1316_SDCA_CTL_UDMPU_CLUSTER 0x10 + +/* RT1316 SDCA channel */ +#define CH_L 0x01 +#define CH_R 0x02 + +struct rt1316_sdw_priv { + struct snd_soc_component *component; + struct regmap *regmap; + struct sdw_slave *sdw_slave; + struct sdw_bus_params params; + bool hw_init; + bool first_hw_init; + unsigned char *bq_params; + unsigned int bq_params_cnt; +}; + +#endif /* __RT1316_SDW_H__ */ -- cgit v1.3.1