56 static bool dump_vma_snapshot(struct coredump_params *cprm);
57 static void free_vma_snapshot(struct coredump_params *cprm);
201 static int format_corename(struct core_name *cn, struct coredump_params *cprm,  in format_corename()  argument
293 					__get_dumpable(cprm->mm_flags));  in format_corename()
298 						cprm->siginfo->si_signo);  in format_corename()
333 				err = cn_printf(cn, "%d", cprm->cpu);  in format_corename()
535 	struct coredump_params cprm = {  in do_coredump()  local
553 	if (!__get_dumpable(cprm.mm_flags))  in do_coredump()
565 	if (__get_dumpable(cprm.mm_flags) == SUID_DUMP_ROOT) {  in do_coredump()
577 	ispipe = format_corename(&cn, &cprm, &argv, &argc);  in do_coredump()
591 		if (cprm.limit == 1) {  in do_coredump()
613 		cprm.limit = RLIM_INFINITY;  in do_coredump()
637 						umh_pipe_setup, NULL, &cprm);  in do_coredump()
654 		if (cprm.limit < binfmt->min_coredump)  in do_coredump()
701 			cprm.file = file_open_root(&root, cn.corename,  in do_coredump()
705 			cprm.file = filp_open(cn.corename, open_flags, 0600);  in do_coredump()
707 		if (IS_ERR(cprm.file))  in do_coredump()
710 		inode = file_inode(cprm.file);  in do_coredump()
713 		if (d_unhashed(cprm.file->f_path.dentry))  in do_coredump()
727 		idmap = file_mnt_idmap(cprm.file);  in do_coredump()
739 		if (!(cprm.file->f_mode & FMODE_CAN_WRITE))  in do_coredump()
741 		if (do_truncate(idmap, cprm.file->f_path.dentry,  in do_coredump()
742 				0, 0, cprm.file))  in do_coredump()
756 		if (!cprm.file) {  in do_coredump()
760 		if (!dump_vma_snapshot(&cprm))  in do_coredump()
763 		file_start_write(cprm.file);  in do_coredump()
764 		core_dumped = binfmt->core_dump(&cprm);  in do_coredump()
771 		if (cprm.to_skip) {  in do_coredump()
772 			cprm.to_skip--;  in do_coredump()
773 			dump_emit(&cprm, "", 1);  in do_coredump()
775 		file_end_write(cprm.file);  in do_coredump()
776 		free_vma_snapshot(&cprm);  in do_coredump()
779 		wait_for_dump_helpers(cprm.file);  in do_coredump()
781 	if (cprm.file)  in do_coredump()
782 		filp_close(cprm.file, NULL);  in do_coredump()
802 static int __dump_emit(struct coredump_params *cprm, const void *addr, int nr)  in __dump_emit()  argument
804 	struct file *file = cprm->file;  in __dump_emit()
807 	if (cprm->written + nr > cprm->limit)  in __dump_emit()
817 	cprm->written += n;  in __dump_emit()
818 	cprm->pos += n;  in __dump_emit()
823 static int __dump_skip(struct coredump_params *cprm, size_t nr)  in __dump_skip()  argument
826 	struct file *file = cprm->file;  in __dump_skip()
831 		cprm->pos += nr;  in __dump_skip()
835 			if (!__dump_emit(cprm, zeroes, PAGE_SIZE))  in __dump_skip()
839 		return __dump_emit(cprm, zeroes, nr);  in __dump_skip()
843 int dump_emit(struct coredump_params *cprm, const void *addr, int nr)  in dump_emit()  argument
845 	if (cprm->to_skip) {  in dump_emit()
846 		if (!__dump_skip(cprm, cprm->to_skip))  in dump_emit()
848 		cprm->to_skip = 0;  in dump_emit()
850 	return __dump_emit(cprm, addr, nr);  in dump_emit()
854 void dump_skip_to(struct coredump_params *cprm, unsigned long pos)  in dump_skip_to()  argument
856 	cprm->to_skip = pos - cprm->pos;  in dump_skip_to()
860 void dump_skip(struct coredump_params *cprm, size_t nr)  in dump_skip()  argument
862 	cprm->to_skip += nr;  in dump_skip()
867 static int dump_emit_page(struct coredump_params *cprm, struct page *page)  in dump_emit_page()  argument
871 	struct file *file = cprm->file;  in dump_emit_page()
875 	if (cprm->to_skip) {  in dump_emit_page()
876 		if (!__dump_skip(cprm, cprm->to_skip))  in dump_emit_page()
878 		cprm->to_skip = 0;  in dump_emit_page()
880 	if (cprm->written + PAGE_SIZE > cprm->limit)  in dump_emit_page()
888 	n = __kernel_write_iter(cprm->file, &iter, &pos);  in dump_emit_page()
892 	cprm->written += PAGE_SIZE;  in dump_emit_page()
893 	cprm->pos += PAGE_SIZE;  in dump_emit_page()
898 int dump_user_range(struct coredump_params *cprm, unsigned long start,  in dump_user_range()  argument
915 			int stop = !dump_emit_page(cprm, page);  in dump_user_range()
920 			dump_skip(cprm, PAGE_SIZE);  in dump_user_range()
927 int dump_align(struct coredump_params *cprm, int align)  in dump_align()  argument
929 	unsigned mod = (cprm->pos + cprm->to_skip) & (align - 1);  in dump_align()
933 		cprm->to_skip += align - mod;  in dump_align()
1127 static void free_vma_snapshot(struct coredump_params *cprm)  in free_vma_snapshot()  argument
1129 	if (cprm->vma_meta) {  in free_vma_snapshot()
1131 		for (i = 0; i < cprm->vma_count; i++) {  in free_vma_snapshot()
1132 			struct file *file = cprm->vma_meta[i].file;  in free_vma_snapshot()
1136 		kvfree(cprm->vma_meta);  in free_vma_snapshot()
1137 		cprm->vma_meta = NULL;  in free_vma_snapshot()
1145 static bool dump_vma_snapshot(struct coredump_params *cprm)  in dump_vma_snapshot()  argument
1160 	cprm->vma_data_size = 0;  in dump_vma_snapshot()
1162 	cprm->vma_count = mm->map_count + (gate_vma ? 1 : 0);  in dump_vma_snapshot()
1164 	cprm->vma_meta = kvmalloc_array(cprm->vma_count, sizeof(*cprm->vma_meta), GFP_KERNEL);  in dump_vma_snapshot()
1165 	if (!cprm->vma_meta) {  in dump_vma_snapshot()
1171 		struct core_vma_metadata *m = cprm->vma_meta + i;  in dump_vma_snapshot()
1176 		m->dump_size = vma_dump_size(vma, cprm->mm_flags);  in dump_vma_snapshot()
1186 	for (i = 0; i < cprm->vma_count; i++) {  in dump_vma_snapshot()
1187 		struct core_vma_metadata *m = cprm->vma_meta + i;  in dump_vma_snapshot()
1200 		cprm->vma_data_size += m->dump_size;  in dump_vma_snapshot()