linux-master/kernel/kexec_elf.c

185 static bool elf_is_phdr_sane(const struct elf_phdr *phdr, size_t buf_len)
188 	if (phdr->p_offset + phdr->p_filesz < phdr->p_offset) {
191 	} else if (phdr->p_offset + phdr->p_filesz > buf_len) {
194 	} else if (phdr->p_paddr + phdr->p_memsz < phdr->p_paddr) {
207 	struct elf_phdr *phdr = (struct elf_phdr *) &elf_info->proghdrs[idx];
215 	phdr->p_type   = elf32_to_cpu(elf_info->ehdr, buf_phdr->p_type);
216 	phdr->p_flags  = elf32_to_cpu(elf_info->ehdr, buf_phdr->p_flags);
220 		phdr->p_offset = elf64_to_cpu(ehdr, buf_phdr->p_offset);
221 		phdr->p_paddr  = elf64_to_cpu(ehdr, buf_phdr->p_paddr);
222 		phdr->p_vaddr  = elf64_to_cpu(ehdr, buf_phdr->p_vaddr);
223 		phdr->p_filesz = elf64_to_cpu(ehdr, buf_phdr->p_filesz);
224 		phdr->p_memsz  = elf64_to_cpu(ehdr, buf_phdr->p_memsz);
225 		phdr->p_align  = elf64_to_cpu(ehdr, buf_phdr->p_align);
229 		phdr->p_offset = elf32_to_cpu(ehdr, buf_phdr->p_offset);
230 		phdr->p_paddr  = elf32_to_cpu(ehdr, buf_phdr->p_paddr);
231 		phdr->p_vaddr  = elf32_to_cpu(ehdr, buf_phdr->p_vaddr);
232 		phdr->p_filesz = elf32_to_cpu(ehdr, buf_phdr->p_filesz);
233 		phdr->p_memsz  = elf32_to_cpu(ehdr, buf_phdr->p_memsz);
234 		phdr->p_align  = elf32_to_cpu(ehdr, buf_phdr->p_align);
242 	return elf_is_phdr_sane(phdr, len) ? 0 : -ENOEXEC;
401 		const struct elf_phdr *phdr;
403 		phdr = &elf_info->proghdrs[i];
404 		if (phdr->p_type != PT_LOAD)
407 		size = phdr->p_filesz;
408 		if (size > phdr->p_memsz)
409 			size = phdr->p_memsz;
411 		kbuf->buffer = (void *) elf_info->buffer + phdr->p_offset;
413 		kbuf->memsz = phdr->p_memsz;
414 		kbuf->buf_align = phdr->p_align;
415 		kbuf->buf_min = phdr->p_paddr;