From 506ada89629ec7059b96ecfb0dc7d33ece0103ca Mon Sep 17 00:00:00 2001 From: Eduard Zingerman Date: Fri, 4 Sep 2026 17:05:56 -0700 Subject: bpf: mark a NULL kfunc argument precise check_kfunc_arg() allows bpf_register_is_null() for nullable arguments w/o marking the underlying scalar register precise. Hence a checkpoint created on such a path would prune against arbitrary scalar value. Fixes: 3bda08b63670 ("bpf: Allow NULL buffers in bpf_dynptr_slice(_rw)") Signed-off-by: Eduard Zingerman Link: https://lore.kernel.org/r/20260904-register-is-null-precise-fixes-v1-5-0f5a360ff15d@gmail.com Signed-off-by: Alexei Starovoitov --- drivers/nvmem/internals.h | 61 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 61 insertions(+) create mode 100644 drivers/nvmem/internals.h (limited to 'drivers/nvmem/internals.h') diff --git a/drivers/nvmem/internals.h b/drivers/nvmem/internals.h new file mode 100644 index 000000000..f6d452b6a --- /dev/null +++ b/drivers/nvmem/internals.h @@ -0,0 +1,61 @@ +/* SPDX-License-Identifier: GPL-2.0 */ + +#ifndef _LINUX_NVMEM_INTERNALS_H +#define _LINUX_NVMEM_INTERNALS_H + +#include +#include +#include + +struct nvmem_device { + struct module *owner; + struct device dev; + struct list_head node; + int stride; + int word_size; + int id; + struct kref refcnt; + size_t size; + bool read_only; + bool root_only; + int flags; + enum nvmem_type type; + struct bin_attribute eeprom; + struct device *base_dev; + struct list_head cells; + void (*fixup_dt_cell_info)(struct nvmem_device *nvmem, + struct nvmem_cell_info *cell); + const struct nvmem_keepout *keepout; + unsigned int nkeepout; + nvmem_reg_read_t reg_read; + nvmem_reg_write_t reg_write; + struct gpio_desc *wp_gpio; + struct nvmem_layout *layout; + void *priv; + bool sysfs_cells_populated; +}; + +int nvmem_add_cells_from_dt(struct nvmem_device *nvmem, struct device_node *np); + +#if IS_ENABLED(CONFIG_OF) +int nvmem_layout_bus_register(void); +void nvmem_layout_bus_unregister(void); +int nvmem_populate_layout(struct nvmem_device *nvmem); +void nvmem_destroy_layout(struct nvmem_device *nvmem); +#else /* CONFIG_OF */ +static inline int nvmem_layout_bus_register(void) +{ + return 0; +} + +static inline void nvmem_layout_bus_unregister(void) {} + +static inline int nvmem_populate_layout(struct nvmem_device *nvmem) +{ + return 0; +} + +static inline void nvmem_destroy_layout(struct nvmem_device *nvmem) { } +#endif /* CONFIG_OF */ + +#endif /* ifndef _LINUX_NVMEM_INTERNALS_H */ -- cgit v1.3.1