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/fs210x.h | 75 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 sound/soc/codecs/fs210x.h (limited to 'sound/soc/codecs/fs210x.h') diff --git a/sound/soc/codecs/fs210x.h b/sound/soc/codecs/fs210x.h new file mode 100644 index 000000000..78e176033 --- /dev/null +++ b/sound/soc/codecs/fs210x.h @@ -0,0 +1,75 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * fs210x.h -- Driver for the FS2104/5S Audio Amplifier + * + * Copyright (C) 2016-2025 Shanghai FourSemi Semiconductor Co.,Ltd. + */ + +#ifndef __FS210X_H__ +#define __FS210X_H__ + +#define FS210X_00H_STATUS 0x00 +#define FS210X_03H_DEVID 0x03 +#define FS210X_05H_ANASTAT 0x05 +#define FS210X_06H_DIGSTAT 0x06 +#define FS210X_0BH_ACCKEY 0x0B +#define FS210X_0FH_I2CADDR 0x0F +#define FS210X_10H_PWRCTRL 0x10 +#define FS210X_11H_SYSCTRL 0x11 +#define FS210X_17H_I2SCTRL 0x17 +#define FS210X_30H_DACCTRL 0x30 +#define FS210X_39H_LVOLCTRL 0x39 +#define FS210X_3AH_RVOLCTRL 0x3A +#define FS210X_42H_DACEQWL 0x42 +#define FS210X_46H_DACEQA 0x46 +#define FS210X_A1H_PLLCTRL1 0xA1 +#define FS210X_A2H_PLLCTRL2 0xA2 +#define FS210X_A3H_PLLCTRL3 0xA3 +#define FS210X_ABH_INTSTAT 0xAB +#define FS210X_ACH_INTSTATR 0xAC + +#define FS210X_05H_PVDD_SHIFT 14 +#define FS210X_05H_PVDD_MASK BIT(14) +#define FS210X_05H_OCDL_SHIFT 13 +#define FS210X_05H_OCDL_MASK BIT(13) +#define FS210X_05H_UVDL_SHIFT 12 +#define FS210X_05H_UVDL_MASK BIT(12) +#define FS210X_05H_OVDL_SHIFT 11 +#define FS210X_05H_OVDL_MASK BIT(11) +#define FS210X_05H_OTPDL_SHIFT 10 +#define FS210X_05H_OTPDL_MASK BIT(10) +#define FS210X_05H_OCRDL_SHIFT 9 +#define FS210X_05H_OCRDL_MASK BIT(9) +#define FS210X_05H_OCLDL_SHIFT 8 +#define FS210X_05H_OCLDL_MASK BIT(8) +#define FS210X_05H_DCRDL_SHIFT 7 +#define FS210X_05H_DCRDL_MASK BIT(7) +#define FS210X_05H_DCLDL_SHIFT 6 +#define FS210X_05H_DCLDL_MASK BIT(6) +#define FS210X_05H_SRDL_SHIFT 5 +#define FS210X_05H_SRDL_MASK BIT(5) +#define FS210X_05H_OTWDL_SHIFT 4 +#define FS210X_05H_OTWDL_MASK BIT(4) +#define FS210X_05H_AMPS_SHIFT 3 +#define FS210X_05H_AMPS_MASK BIT(3) +#define FS210X_05H_PLLS_SHIFT 1 +#define FS210X_05H_PLLS_MASK BIT(1) +#define FS210X_05H_ANAS_SHIFT 0 +#define FS210X_05H_ANAS_MASK BIT(0) +#define FS210X_17H_I2SSR_SHIFT 12 +#define FS210X_17H_I2SSR_MASK GENMASK(15, 12) +#define FS210X_30H_RMUTE_SHIFT 8 +#define FS210X_30H_LMUTE_SHIFT 4 + +#define FS210X_0BH_ACCKEY_ON 0x0091 +#define FS210X_0BH_ACCKEY_OFF 0x0000 +#define FS210X_10H_I2C_RESET 0x0002 +#define FS210X_11H_DPS_HIZ 0x0100 +#define FS210X_11H_DPS_PWDN 0x0000 +#define FS210X_11H_DPS_PLAY 0x0300 +#define FS210X_46H_CAM_BURST_L 0x8000 +#define FS210X_46H_CAM_BURST_R 0x8200 +#define FS2105S_46H_CAM_BURST_W 0x8400 +#define FS210X_46H_CAM_CLEAR 0x0000 + +#endif /* __FS210X_H__ */ -- cgit v1.3.1