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/rt766-sdca-sdw.h | 61 +++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 sound/soc/codecs/rt766-sdca-sdw.h (limited to 'sound/soc/codecs/rt766-sdca-sdw.h') diff --git a/sound/soc/codecs/rt766-sdca-sdw.h b/sound/soc/codecs/rt766-sdca-sdw.h new file mode 100644 index 000000000..3e923a1ea --- /dev/null +++ b/sound/soc/codecs/rt766-sdca-sdw.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * rt766-sdca-sdw.h -- RT766 SDCA ALSA SoC audio driver header + * + * Copyright(c) 2026 Realtek Semiconductor Corp. + */ + +#ifndef __RT766_SDW_H__ +#define __RT766_SDW_H__ + +#include +#include + +static const struct reg_default rt766_sdca_defaults[] = { + /* 0x40400289 - 0x4040028a */ + { RT766_MUTE_REG(UAJ, USER_FU41, 1), 0x01 }, + { RT766_MUTE_REG(UAJ, USER_FU41, 2), 0x01 }, + /* 0x40400291 - 0x40400292 */ + { RT766_VOLUME_REG(UAJ, USER_FU41, 1), 0x0000 }, + { RT766_VOLUME_REG(UAJ, USER_FU41, 2), 0x0000 }, + /* 0x40400789 - 0x4040078a */ + { RT766_MUTE_REG(UAJ, USER_FU36, 1), 0x01 }, + { RT766_MUTE_REG(UAJ, USER_FU36, 2), 0x01 }, + /* 0x40400791 - 0x40400792 */ + { RT766_VOLUME_REG(UAJ, USER_FU36, 1), 0x0000 }, + { RT766_VOLUME_REG(UAJ, USER_FU36, 2), 0x0000 }, + { RT766_PDE_REQ_REG(UAJ, PDE47), 0x03 }, /* 0x40401408 */ + { RT766_PDE_REQ_REG(UAJ, PDE34), 0x03 }, /* 0x40401488 */ + { RT766_SDCA_CTL(UAJ, CS41, SDCA_CTL_CS_SAMPLERATEINDEX), 0x09 }, /* 0x40480080 */ + { RT766_SDCA_CTL(UAJ, CS36, SDCA_CTL_CS_SAMPLERATEINDEX), 0x09 }, /* 0x40480880 */ + /* 0x40600259 - 0x4060025a */ + { RT766_GAIN_REG(UAJ, PLATFORM_FU33, 1), 0xfe00 }, + { RT766_GAIN_REG(UAJ, PLATFORM_FU33, 2), 0xfe00 }, + { RT766_SDCA_CTL(UAJ, GE49, SDCA_CTL_GE_SELECTED_MODE), 0x00 }, /* 0x40600488 */ + + { RT766_PDE_REQ_REG(MIC, PDE11), 0x03 }, /* 0x40801508 */ + /* 0x40801809 - 0x4080180c */ + { RT766_MUTE_REG(MIC, USER_FU113, 1), 0x01 }, + { RT766_MUTE_REG(MIC, USER_FU113, 2), 0x01 }, + { RT766_MUTE_REG(MIC, USER_FU113, 3), 0x01 }, + { RT766_MUTE_REG(MIC, USER_FU113, 4), 0x01 }, + /* 0x40801811 - 0x40801814 */ + { RT766_VOLUME_REG(MIC, USER_FU113, 1), 0x0000 }, + { RT766_VOLUME_REG(MIC, USER_FU113, 2), 0x0000 }, + { RT766_VOLUME_REG(MIC, USER_FU113, 3), 0x0000 }, + { RT766_VOLUME_REG(MIC, USER_FU113, 4), 0x0000 }, + { RT766_SDCA_CTL(MIC, CS113, SDCA_CTL_CS_SAMPLERATEINDEX), 0x09 }, /* 0x40880900 */ + + /* 0x41000189 - 0x4100018a */ + { RT766_MUTE_REG(AMP, USER_FU21, 1), 0x01 }, + { RT766_MUTE_REG(AMP, USER_FU21, 2), 0x01 }, + /* 0x41000191 - 0x41000192 */ + { RT766_VOLUME_REG(AMP, USER_FU21, 1), 0x0000 }, + { RT766_VOLUME_REG(AMP, USER_FU21, 2), 0x0000 }, + { RT766_PDE_REQ_REG(AMP, PDE23), 0x03 }, /* 0x41001988 */ + { RT766_SDCA_CTL(AMP, PPU21, SDCA_CTL_PPU_POSTURENUMBER), 0x00 }, /* 0x41080200 */ + { RT766_SDCA_CTL(AMP, CS21, SDCA_CTL_CS_SAMPLERATEINDEX), 0x09 }, /* 0x41081080 */ + +}; + +#endif /* __RT766_SDW_H__ */ -- cgit v1.3.1