====== kernel modules ======

Cannot load compiled out-of-tree module:

<code>
module foo: .gnu.linkonce.this_module section size must match the kernel's built struct module size at run time
</code>

<file c kernel/module/main.c>
static int elf_validity_cache_copy(struct load_info *info, int flags)
{
...
	if (shdr->sh_size != sizeof(struct module)) {
		pr_err("module %s: .gnu.linkonce.this_module section size must match the kernel's built struct module size at run time\n",
		       info->name ?: "(missing .modinfo section or name field)");
		goto no_exec;
	}
}
</file>

[[https://elixir.bootlin.com/linux/v6.17.2/source/include/linux/module.h#L394|include/linux/module.h]]
<file c include/linux/module.h>
struct module {
	enum module_state state;

	/* Member of list of modules */
	struct list_head list;

	/* Unique handle for this module */
	char name[MODULE_NAME_LEN];

#ifdef CONFIG_STACKTRACE_BUILD_ID
	/* Module build ID */
	unsigned char build_id[BUILD_ID_SIZE_MAX];
#endif

	/* Sysfs stuff. */
	struct module_kobject mkobj;
	struct module_attribute *modinfo_attrs;
	const char *version;
	const char *srcversion;
	struct kobject *holders_dir;

	/* Exported symbols */
	const struct kernel_symbol *syms;
	const s32 *crcs;
	unsigned int num_syms;

#ifdef CONFIG_ARCH_USES_CFI_TRAPS
	s32 *kcfi_traps;
	s32 *kcfi_traps_end;
#endif

	/* Kernel parameters. */
#ifdef CONFIG_SYSFS
	struct mutex param_lock;
#endif
	struct kernel_param *kp;
	unsigned int num_kp;

	/* GPL-only exported symbols. */
	unsigned int num_gpl_syms;
	const struct kernel_symbol *gpl_syms;
	const s32 *gpl_crcs;
	bool using_gplonly_symbols;

#ifdef CONFIG_MODULE_SIG
	/* Signature was verified. */
	bool sig_ok;
#endif

	bool async_probe_requested;

	/* Exception table */
	unsigned int num_exentries;
	struct exception_table_entry *extable;

	/* Startup function. */
	int (*init)(void);

	struct module_memory mem[MOD_MEM_NUM_TYPES] __module_memory_align;

	/* Arch-specific module values */
	struct mod_arch_specific arch;

	unsigned long taints;	/* same bits as kernel:taint_flags */

#ifdef CONFIG_GENERIC_BUG
	/* Support for BUG */
	unsigned num_bugs;
	struct list_head bug_list;
	struct bug_entry *bug_table;
#endif

#ifdef CONFIG_KALLSYMS
	/* Protected by RCU and/or module_mutex: use rcu_dereference() */
	struct mod_kallsyms __rcu *kallsyms;
	struct mod_kallsyms core_kallsyms;

	/* Section attributes */
	struct module_sect_attrs *sect_attrs;

	/* Notes attributes */
	struct module_notes_attrs *notes_attrs;
#endif

	/* The command line arguments (may be mangled).  People like
	   keeping pointers to this stuff */
	char *args;

#ifdef CONFIG_SMP
	/* Per-cpu data. */
	void __percpu *percpu;
	unsigned int percpu_size;
#endif
	void *noinstr_text_start;
	unsigned int noinstr_text_size;

#ifdef CONFIG_TRACEPOINTS
	unsigned int num_tracepoints;
	tracepoint_ptr_t *tracepoints_ptrs;
#endif
#ifdef CONFIG_TREE_SRCU
	unsigned int num_srcu_structs;
	struct srcu_struct **srcu_struct_ptrs;
#endif
#ifdef CONFIG_BPF_EVENTS
	unsigned int num_bpf_raw_events;
	struct bpf_raw_event_map *bpf_raw_events;
#endif
#ifdef CONFIG_DEBUG_INFO_BTF_MODULES
	unsigned int btf_data_size;
	void *btf_data;
#endif
#ifdef CONFIG_JUMP_LABEL
	struct jump_entry *jump_entries;
	unsigned int num_jump_entries;
#endif
#ifdef CONFIG_TRACING
	unsigned int num_trace_bprintk_fmt;
	const char **trace_bprintk_fmt_start;
#endif
#ifdef CONFIG_EVENT_TRACING
	struct trace_event_call **trace_events;
	unsigned int num_trace_events;
	struct trace_eval_map **trace_evals;
	unsigned int num_trace_evals;
#endif
#ifdef CONFIG_FTRACE_MCOUNT_RECORD
	unsigned int num_ftrace_callsites;
	unsigned long *ftrace_callsites;
#endif
#ifdef CONFIG_KPROBES
	void *kprobes_text_start;
	unsigned int kprobes_text_size;
	unsigned long *kprobe_blacklist;
	unsigned int num_kprobe_blacklist;
#endif
#ifdef CONFIG_HAVE_STATIC_CALL_INLINE
	int num_static_call_sites;
	struct static_call_site *static_call_sites;
#endif
#if IS_ENABLED(CONFIG_KUNIT)
	int num_kunit_suites;
	struct kunit_suite **kunit_suites;
#endif


#ifdef CONFIG_LIVEPATCH
	bool klp; /* Is this a livepatch module? */
	bool klp_alive;

	/* ELF information */
	struct klp_modinfo *klp_info;
#endif

#ifdef CONFIG_PRINTK_INDEX
	unsigned int printk_index_size;
	struct pi_entry **printk_index_start;
#endif

#ifdef CONFIG_MODULE_UNLOAD
	/* What modules depend on me? */
	struct list_head source_list;
	/* What modules do I depend on? */
	struct list_head target_list;

	/* Destruction function. */
	void (*exit)(void);

	atomic_t refcnt;
#endif

#ifdef CONFIG_MITIGATION_ITS
	int its_num_pages;
	void **its_page_array;
#endif

#ifdef CONFIG_CONSTRUCTORS
	/* Constructor functions. */
	ctor_fn_t *ctors;
	unsigned int num_ctors;
#endif

#ifdef CONFIG_FUNCTION_ERROR_INJECTION
	struct error_injection_entry *ei_funcs;
	unsigned int num_ei_funcs;
#endif
#ifdef CONFIG_DYNAMIC_DEBUG_CORE
	struct _ddebug_info dyndbg_info;
#endif
} ____cacheline_aligned __randomize_layout;
</file>

Reason:
module was compiled using older version of SDK generated by Yocto. Regeneration SDK and reinstall it on host helps.