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 --- drivers/media/dvb-frontends/stv0367.h | 64 +++++++++++++++++++++++++++++++++++ 1 file changed, 64 insertions(+) create mode 100644 drivers/media/dvb-frontends/stv0367.h (limited to 'drivers/media/dvb-frontends/stv0367.h') diff --git a/drivers/media/dvb-frontends/stv0367.h b/drivers/media/dvb-frontends/stv0367.h new file mode 100644 index 000000000..d18ae0f94 --- /dev/null +++ b/drivers/media/dvb-frontends/stv0367.h @@ -0,0 +1,64 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * stv0367.h + * + * Driver for ST STV0367 DVB-T & DVB-C demodulator IC. + * + * Copyright (C) ST Microelectronics. + * Copyright (C) 2010,2011 NetUP Inc. + * Copyright (C) 2010,2011 Igor M. Liplianin + */ + +#ifndef STV0367_H +#define STV0367_H + +#include +#include + +#define STV0367_ICSPEED_53125 53125000 +#define STV0367_ICSPEED_58000 58000000 + +struct stv0367_config { + u8 demod_address; + u32 xtal; + u32 if_khz;/*4500*/ + int if_iq_mode; + int ts_mode; + int clk_pol; +}; + +#if IS_REACHABLE(CONFIG_DVB_STV0367) +extern struct +dvb_frontend *stv0367ter_attach(const struct stv0367_config *config, + struct i2c_adapter *i2c); +extern struct +dvb_frontend *stv0367cab_attach(const struct stv0367_config *config, + struct i2c_adapter *i2c); +extern struct +dvb_frontend *stv0367ddb_attach(const struct stv0367_config *config, + struct i2c_adapter *i2c); +#else +static inline struct +dvb_frontend *stv0367ter_attach(const struct stv0367_config *config, + struct i2c_adapter *i2c) +{ + printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__); + return NULL; +} +static inline struct +dvb_frontend *stv0367cab_attach(const struct stv0367_config *config, + struct i2c_adapter *i2c) +{ + printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__); + return NULL; +} +static inline struct +dvb_frontend *stv0367ddb_attach(const struct stv0367_config *config, + struct i2c_adapter *i2c) +{ + printk(KERN_WARNING "%s: driver disabled by Kconfig\n", __func__); + return NULL; +} +#endif + +#endif -- cgit v1.3.1