From 33a154a96e71a34a1bcca9f40da343dbbf7b38b4 Mon Sep 17 00:00:00 2001 From: Alexei Starovoitov Date: Thu, 1 Oct 2026 14:52:55 +0000 Subject: selftests/bpf: Test packet range of pointers sharing an id Add tests where two packet pointers share an id and tightening one pointer's umax from its var_off would put it less than their constant distance from the other's umax: with an index & 0x38 capped at 50, the base pointer keeps umax 50, so the pointer 8 bytes further on must keep umax 58, even though its known bits allow at most 56. These refused a valid program or accepted an out-of-bounds access before the fix: - check the advanced copy, load through the base: valid, was refused; - check the base, load the byte at base + 1 through a copy advanced by 8: was accepted; - check base + 4, load 4 bytes at base + 2 through base + 8: reads two bytes past the checked range, was accepted; - the same as the second with data_meta pointers checked against data: was accepted. These pass with and without the fix and cover nearby paths: - subtract an unknown scalar from a checked pointer and load below it (the range is kept across a new id); - reach a load through two paths whose checks cover 8 and 7 bytes after the loaded pointer; the second path must not be pruned by the first; - spill a copy of a pointer, check the pointer, fill the copy and load one byte past the checked range: the load is refused, and the copy has the range of the check. Signed-off-by: Alexei Starovoitov Link: https://lore.kernel.org/bpf/20261001145255.855630-2-alexei.starovoitov@gmail.com Signed-off-by: Kumar Kartikeya Dwivedi --- include/soc/tegra/flowctrl.h | 71 ++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 71 insertions(+) create mode 100644 include/soc/tegra/flowctrl.h (limited to 'include/soc/tegra/flowctrl.h') diff --git a/include/soc/tegra/flowctrl.h b/include/soc/tegra/flowctrl.h new file mode 100644 index 000000000..2a60bd493 --- /dev/null +++ b/include/soc/tegra/flowctrl.h @@ -0,0 +1,71 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * Functions and macros to control the flowcontroller + * + * Copyright (c) 2010-2012, NVIDIA Corporation. All rights reserved. + */ + +#ifndef __SOC_TEGRA_FLOWCTRL_H__ +#define __SOC_TEGRA_FLOWCTRL_H__ + +#define FLOW_CTRL_HALT_CPU0_EVENTS 0x0 +#define FLOW_CTRL_WAITEVENT (2 << 29) +#define FLOW_CTRL_WAIT_FOR_INTERRUPT (4 << 29) +#define FLOW_CTRL_JTAG_RESUME (1 << 28) +#define FLOW_CTRL_SCLK_RESUME (1 << 27) +#define FLOW_CTRL_HALT_CPU_IRQ (1 << 10) +#define FLOW_CTRL_HALT_CPU_FIQ (1 << 8) +#define FLOW_CTRL_HALT_LIC_IRQ (1 << 11) +#define FLOW_CTRL_HALT_LIC_FIQ (1 << 10) +#define FLOW_CTRL_HALT_GIC_IRQ (1 << 9) +#define FLOW_CTRL_HALT_GIC_FIQ (1 << 8) +#define FLOW_CTRL_CPU0_CSR 0x8 +#define FLOW_CTRL_CSR_INTR_FLAG (1 << 15) +#define FLOW_CTRL_CSR_EVENT_FLAG (1 << 14) +#define FLOW_CTRL_CSR_ENABLE_EXT_CRAIL (1 << 13) +#define FLOW_CTRL_CSR_ENABLE_EXT_NCPU (1 << 12) +#define FLOW_CTRL_CSR_ENABLE_EXT_MASK ( \ + FLOW_CTRL_CSR_ENABLE_EXT_NCPU | \ + FLOW_CTRL_CSR_ENABLE_EXT_CRAIL) +#define FLOW_CTRL_CSR_ENABLE (1 << 0) +#define FLOW_CTRL_HALT_CPU1_EVENTS 0x14 +#define FLOW_CTRL_CPU1_CSR 0x18 + +#define TEGRA20_FLOW_CTRL_CSR_WFE_CPU0 (1 << 4) +#define TEGRA20_FLOW_CTRL_CSR_WFE_BITMAP (3 << 4) +#define TEGRA20_FLOW_CTRL_CSR_WFI_BITMAP 0 + +#define TEGRA30_FLOW_CTRL_CSR_WFI_CPU0 (1 << 8) +#define TEGRA30_FLOW_CTRL_CSR_WFE_BITMAP (0xF << 4) +#define TEGRA30_FLOW_CTRL_CSR_WFI_BITMAP (0xF << 8) + +#ifndef __ASSEMBLER__ +#ifdef CONFIG_SOC_TEGRA_FLOWCTRL +u32 flowctrl_read_cpu_csr(unsigned int cpuid); +void flowctrl_write_cpu_csr(unsigned int cpuid, u32 value); +void flowctrl_write_cpu_halt(unsigned int cpuid, u32 value); + +void flowctrl_cpu_suspend_enter(unsigned int cpuid); +void flowctrl_cpu_suspend_exit(unsigned int cpuid); +#else +static inline u32 flowctrl_read_cpu_csr(unsigned int cpuid) +{ + return 0; +} + +static inline void flowctrl_write_cpu_csr(unsigned int cpuid, u32 value) +{ +} + +static inline void flowctrl_write_cpu_halt(unsigned int cpuid, u32 value) {} + +static inline void flowctrl_cpu_suspend_enter(unsigned int cpuid) +{ +} + +static inline void flowctrl_cpu_suspend_exit(unsigned int cpuid) +{ +} +#endif /* CONFIG_SOC_TEGRA_FLOWCTRL */ +#endif /* __ASSEMBLER__ */ +#endif /* __SOC_TEGRA_FLOWCTRL_H__ */ -- cgit v1.3.1