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/tda10071.h | 41 ++++++++++++++++++++++++++++++++++ 1 file changed, 41 insertions(+) create mode 100644 drivers/media/dvb-frontends/tda10071.h (limited to 'drivers/media/dvb-frontends/tda10071.h') diff --git a/drivers/media/dvb-frontends/tda10071.h b/drivers/media/dvb-frontends/tda10071.h new file mode 100644 index 000000000..c282c836f --- /dev/null +++ b/drivers/media/dvb-frontends/tda10071.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * NXP TDA10071 + Conexant CX24118A DVB-S/S2 demodulator + tuner driver + * + * Copyright (C) 2011 Antti Palosaari + */ + +#ifndef TDA10071_H +#define TDA10071_H + +#include + +/* + * I2C address + * 0x05, 0x55, + */ + +/** + * struct tda10071_platform_data - Platform data for the tda10071 driver + * @clk: Clock frequency. + * @i2c_wr_max: Max bytes I2C adapter can write at once. + * @ts_mode: TS mode. + * @spec_inv: Input spectrum inversion. + * @pll_multiplier: PLL multiplier. + * @tuner_i2c_addr: CX24118A tuner I2C address (0x14, 0x54, ...). + * @get_dvb_frontend: Get DVB frontend. + */ +struct tda10071_platform_data { + u32 clk; + u16 i2c_wr_max; +#define TDA10071_TS_SERIAL 0 +#define TDA10071_TS_PARALLEL 1 + u8 ts_mode; + bool spec_inv; + u8 pll_multiplier; + u8 tuner_i2c_addr; + + struct dvb_frontend* (*get_dvb_frontend)(struct i2c_client *); +}; + +#endif /* TDA10071_H */ -- cgit v1.3.1