56 static bool dump_vma_snapshot(struct coredump_params *cprm);
57 static void free_vma_snapshot(struct coredump_params *cprm);
198 static int format_corename(struct core_name *cn, struct coredump_params *cprm,  in format_corename()  argument
290 					__get_dumpable(cprm->mm_flags));  in format_corename()
295 						cprm->siginfo->si_signo);  in format_corename()
526 	struct coredump_params cprm = {  in do_coredump()  local
544 	if (!__get_dumpable(cprm.mm_flags))  in do_coredump()
556 	if (__get_dumpable(cprm.mm_flags) == SUID_DUMP_ROOT) {  in do_coredump()
568 	ispipe = format_corename(&cn, &cprm, &argv, &argc);  in do_coredump()
582 		if (cprm.limit == 1) {  in do_coredump()
604 		cprm.limit = RLIM_INFINITY;  in do_coredump()
628 						umh_pipe_setup, NULL, &cprm);  in do_coredump()
645 		if (cprm.limit < binfmt->min_coredump)  in do_coredump()
692 			cprm.file = file_open_root(&root, cn.corename,  in do_coredump()
696 			cprm.file = filp_open(cn.corename, open_flags, 0600);  in do_coredump()
698 		if (IS_ERR(cprm.file))  in do_coredump()
701 		inode = file_inode(cprm.file);  in do_coredump()
704 		if (d_unhashed(cprm.file->f_path.dentry))  in do_coredump()
718 		mnt_userns = file_mnt_user_ns(cprm.file);  in do_coredump()
730 		if (!(cprm.file->f_mode & FMODE_CAN_WRITE))  in do_coredump()
732 		if (do_truncate(mnt_userns, cprm.file->f_path.dentry,  in do_coredump()
733 				0, 0, cprm.file))  in do_coredump()
747 		if (!cprm.file) {  in do_coredump()
751 		if (!dump_vma_snapshot(&cprm))  in do_coredump()
754 		file_start_write(cprm.file);  in do_coredump()
755 		core_dumped = binfmt->core_dump(&cprm);  in do_coredump()
762 		if (cprm.to_skip) {  in do_coredump()
763 			cprm.to_skip--;  in do_coredump()
764 			dump_emit(&cprm, "", 1);  in do_coredump()
766 		file_end_write(cprm.file);  in do_coredump()
767 		free_vma_snapshot(&cprm);  in do_coredump()
770 		wait_for_dump_helpers(cprm.file);  in do_coredump()
772 	if (cprm.file)  in do_coredump()
773 		filp_close(cprm.file, NULL);  in do_coredump()
793 static int __dump_emit(struct coredump_params *cprm, const void *addr, int nr)  in __dump_emit()  argument
795 	struct file *file = cprm->file;  in __dump_emit()
798 	if (cprm->written + nr > cprm->limit)  in __dump_emit()
808 	cprm->written += n;  in __dump_emit()
809 	cprm->pos += n;  in __dump_emit()
814 static int __dump_skip(struct coredump_params *cprm, size_t nr)  in __dump_skip()  argument
817 	struct file *file = cprm->file;  in __dump_skip()
822 		cprm->pos += nr;  in __dump_skip()
826 			if (!__dump_emit(cprm, zeroes, PAGE_SIZE))  in __dump_skip()
830 		return __dump_emit(cprm, zeroes, nr);  in __dump_skip()
834 static int dump_emit_page(struct coredump_params *cprm, struct page *page)  in dump_emit_page()  argument
842 	struct file *file = cprm->file;  in dump_emit_page()
846 	if (cprm->to_skip) {  in dump_emit_page()
847 		if (!__dump_skip(cprm, cprm->to_skip))  in dump_emit_page()
849 		cprm->to_skip = 0;  in dump_emit_page()
851 	if (cprm->written + PAGE_SIZE > cprm->limit)  in dump_emit_page()
857 	n = __kernel_write_iter(cprm->file, &iter, &pos);  in dump_emit_page()
861 	cprm->written += PAGE_SIZE;  in dump_emit_page()
862 	cprm->pos += PAGE_SIZE;  in dump_emit_page()
867 int dump_emit(struct coredump_params *cprm, const void *addr, int nr)  in dump_emit()  argument
869 	if (cprm->to_skip) {  in dump_emit()
870 		if (!__dump_skip(cprm, cprm->to_skip))  in dump_emit()
872 		cprm->to_skip = 0;  in dump_emit()
874 	return __dump_emit(cprm, addr, nr);  in dump_emit()
878 void dump_skip_to(struct coredump_params *cprm, unsigned long pos)  in dump_skip_to()  argument
880 	cprm->to_skip = pos - cprm->pos;  in dump_skip_to()
884 void dump_skip(struct coredump_params *cprm, size_t nr)  in dump_skip()  argument
886 	cprm->to_skip += nr;  in dump_skip()
891 int dump_user_range(struct coredump_params *cprm, unsigned long start,  in dump_user_range()  argument
908 			int stop = !dump_emit_page(cprm, page);  in dump_user_range()
913 			dump_skip(cprm, PAGE_SIZE);  in dump_user_range()
920 int dump_align(struct coredump_params *cprm, int align)  in dump_align()  argument
922 	unsigned mod = (cprm->pos + cprm->to_skip) & (align - 1);  in dump_align()
926 		cprm->to_skip += align - mod;  in dump_align()
1120 static void free_vma_snapshot(struct coredump_params *cprm)  in free_vma_snapshot()  argument
1122 	if (cprm->vma_meta) {  in free_vma_snapshot()
1124 		for (i = 0; i < cprm->vma_count; i++) {  in free_vma_snapshot()
1125 			struct file *file = cprm->vma_meta[i].file;  in free_vma_snapshot()
1129 		kvfree(cprm->vma_meta);  in free_vma_snapshot()
1130 		cprm->vma_meta = NULL;  in free_vma_snapshot()
1138 static bool dump_vma_snapshot(struct coredump_params *cprm)  in dump_vma_snapshot()  argument
1153 	cprm->vma_data_size = 0;  in dump_vma_snapshot()
1155 	cprm->vma_count = mm->map_count + (gate_vma ? 1 : 0);  in dump_vma_snapshot()
1157 	cprm->vma_meta = kvmalloc_array(cprm->vma_count, sizeof(*cprm->vma_meta), GFP_KERNEL);  in dump_vma_snapshot()
1158 	if (!cprm->vma_meta) {  in dump_vma_snapshot()
1164 		struct core_vma_metadata *m = cprm->vma_meta + i;  in dump_vma_snapshot()
1169 		m->dump_size = vma_dump_size(vma, cprm->mm_flags);  in dump_vma_snapshot()
1179 	for (i = 0; i < cprm->vma_count; i++) {  in dump_vma_snapshot()
1180 		struct core_vma_metadata *m = cprm->vma_meta + i;  in dump_vma_snapshot()
1193 		cprm->vma_data_size += m->dump_size;  in dump_vma_snapshot()