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/cs4265.h | 60 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 sound/soc/codecs/cs4265.h (limited to 'sound/soc/codecs/cs4265.h') diff --git a/sound/soc/codecs/cs4265.h b/sound/soc/codecs/cs4265.h new file mode 100644 index 000000000..8bc28c2bf --- /dev/null +++ b/sound/soc/codecs/cs4265.h @@ -0,0 +1,60 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * cs4265.h -- CS4265 ALSA SoC audio driver + * + * Copyright 2014 Cirrus Logic, Inc. + * + * Author: Paul Handrigan + */ + +#ifndef __CS4265_H__ +#define __CS4265_H__ + +#define CS4265_CHIP_ID 0x1 +#define CS4265_CHIP_ID_VAL 0xD0 +#define CS4265_CHIP_ID_MASK 0xF0 +#define CS4265_REV_ID_MASK 0x0F + +#define CS4265_PWRCTL 0x02 +#define CS4265_PWRCTL_PDN 1 + +#define CS4265_DAC_CTL 0x3 +#define CS4265_DAC_CTL_MUTE (1 << 2) +#define CS4265_DAC_CTL_DIF (3 << 4) + +#define CS4265_ADC_CTL 0x4 +#define CS4265_ADC_MASTER 1 +#define CS4265_ADC_DIF (1 << 4) +#define CS4265_ADC_FM (3 << 6) + +#define CS4265_MCLK_FREQ 0x5 +#define CS4265_MCLK_FREQ_MASK (7 << 4) + +#define CS4265_SIG_SEL 0x6 +#define CS4265_SIG_SEL_LOOP (1 << 1) + +#define CS4265_CHB_PGA_CTL 0x7 +#define CS4265_CHA_PGA_CTL 0x8 + +#define CS4265_ADC_CTL2 0x9 + +#define CS4265_DAC_CHA_VOL 0xA +#define CS4265_DAC_CHB_VOL 0xB + +#define CS4265_DAC_CTL2 0xC + +#define CS4265_INT_STATUS 0xD +#define CS4265_INT_MASK 0xE +#define CS4265_STATUS_MODE_MSB 0xF +#define CS4265_STATUS_MODE_LSB 0x10 + +#define CS4265_SPDIF_CTL1 0x11 + +#define CS4265_SPDIF_CTL2 0x12 +#define CS4265_SPDIF_CTL2_MUTE (1 << 4) +#define CS4265_SPDIF_CTL2_DIF (3 << 6) + +#define CS4265_C_DATA_BUFF 0x13 +#define CS4265_MAX_REGISTER 0x2A + +#endif -- cgit v1.3.1