56 static bool dump_vma_snapshot(struct coredump_params *cprm);
57 static void free_vma_snapshot(struct coredump_params *cprm);
200 static int format_corename(struct core_name *cn, struct coredump_params *cprm,  in format_corename()  argument
292 					__get_dumpable(cprm->mm_flags));  in format_corename()
297 						cprm->siginfo->si_signo);  in format_corename()
597 	struct coredump_params cprm = {  in do_coredump()  local
615 	if (!__get_dumpable(cprm.mm_flags))  in do_coredump()
627 	if (__get_dumpable(cprm.mm_flags) == SUID_DUMP_ROOT) {  in do_coredump()
639 	ispipe = format_corename(&cn, &cprm, &argv, &argc);  in do_coredump()
653 		if (cprm.limit == 1) {  in do_coredump()
675 		cprm.limit = RLIM_INFINITY;  in do_coredump()
699 						umh_pipe_setup, NULL, &cprm);  in do_coredump()
716 		if (cprm.limit < binfmt->min_coredump)  in do_coredump()
763 			cprm.file = file_open_root(&root, cn.corename,  in do_coredump()
767 			cprm.file = filp_open(cn.corename, open_flags, 0600);  in do_coredump()
769 		if (IS_ERR(cprm.file))  in do_coredump()
772 		inode = file_inode(cprm.file);  in do_coredump()
775 		if (d_unhashed(cprm.file->f_path.dentry))  in do_coredump()
789 		mnt_userns = file_mnt_user_ns(cprm.file);  in do_coredump()
801 		if (!(cprm.file->f_mode & FMODE_CAN_WRITE))  in do_coredump()
803 		if (do_truncate(mnt_userns, cprm.file->f_path.dentry,  in do_coredump()
804 				0, 0, cprm.file))  in do_coredump()
818 		if (!cprm.file) {  in do_coredump()
822 		if (!dump_vma_snapshot(&cprm))  in do_coredump()
825 		file_start_write(cprm.file);  in do_coredump()
826 		core_dumped = binfmt->core_dump(&cprm);  in do_coredump()
833 		if (cprm.to_skip) {  in do_coredump()
834 			cprm.to_skip--;  in do_coredump()
835 			dump_emit(&cprm, "", 1);  in do_coredump()
837 		file_end_write(cprm.file);  in do_coredump()
838 		free_vma_snapshot(&cprm);  in do_coredump()
841 		wait_for_dump_helpers(cprm.file);  in do_coredump()
843 	if (cprm.file)  in do_coredump()
844 		filp_close(cprm.file, NULL);  in do_coredump()
864 static int __dump_emit(struct coredump_params *cprm, const void *addr, int nr)  in __dump_emit()  argument
866 	struct file *file = cprm->file;  in __dump_emit()
869 	if (cprm->written + nr > cprm->limit)  in __dump_emit()
879 	cprm->written += n;  in __dump_emit()
880 	cprm->pos += n;  in __dump_emit()
885 static int __dump_skip(struct coredump_params *cprm, size_t nr)  in __dump_skip()  argument
888 	struct file *file = cprm->file;  in __dump_skip()
893 		cprm->pos += nr;  in __dump_skip()
897 			if (!__dump_emit(cprm, zeroes, PAGE_SIZE))  in __dump_skip()
901 		return __dump_emit(cprm, zeroes, nr);  in __dump_skip()
905 int dump_emit(struct coredump_params *cprm, const void *addr, int nr)  in dump_emit()  argument
907 	if (cprm->to_skip) {  in dump_emit()
908 		if (!__dump_skip(cprm, cprm->to_skip))  in dump_emit()
910 		cprm->to_skip = 0;  in dump_emit()
912 	return __dump_emit(cprm, addr, nr);  in dump_emit()
916 void dump_skip_to(struct coredump_params *cprm, unsigned long pos)  in dump_skip_to()  argument
918 	cprm->to_skip = pos - cprm->pos;  in dump_skip_to()
922 void dump_skip(struct coredump_params *cprm, size_t nr)  in dump_skip()  argument
924 	cprm->to_skip += nr;  in dump_skip()
929 int dump_user_range(struct coredump_params *cprm, unsigned long start,  in dump_user_range()  argument
949 			stop = !dump_emit(cprm, kaddr, PAGE_SIZE);  in dump_user_range()
955 			dump_skip(cprm, PAGE_SIZE);  in dump_user_range()
962 int dump_align(struct coredump_params *cprm, int align)  in dump_align()  argument
964 	unsigned mod = (cprm->pos + cprm->to_skip) & (align - 1);  in dump_align()
968 		cprm->to_skip += align - mod;  in dump_align()
1115 static void free_vma_snapshot(struct coredump_params *cprm)  in free_vma_snapshot()  argument
1117 	if (cprm->vma_meta) {  in free_vma_snapshot()
1119 		for (i = 0; i < cprm->vma_count; i++) {  in free_vma_snapshot()
1120 			struct file *file = cprm->vma_meta[i].file;  in free_vma_snapshot()
1124 		kvfree(cprm->vma_meta);  in free_vma_snapshot()
1125 		cprm->vma_meta = NULL;  in free_vma_snapshot()
1133 static bool dump_vma_snapshot(struct coredump_params *cprm)  in dump_vma_snapshot()  argument
1147 	cprm->vma_data_size = 0;  in dump_vma_snapshot()
1149 	cprm->vma_count = mm->map_count + (gate_vma ? 1 : 0);  in dump_vma_snapshot()
1151 	cprm->vma_meta = kvmalloc_array(cprm->vma_count, sizeof(*cprm->vma_meta), GFP_KERNEL);  in dump_vma_snapshot()
1152 	if (!cprm->vma_meta) {  in dump_vma_snapshot()
1159 		struct core_vma_metadata *m = cprm->vma_meta + i;  in dump_vma_snapshot()
1164 		m->dump_size = vma_dump_size(vma, cprm->mm_flags);  in dump_vma_snapshot()
1174 	for (i = 0; i < cprm->vma_count; i++) {  in dump_vma_snapshot()
1175 		struct core_vma_metadata *m = cprm->vma_meta + i;  in dump_vma_snapshot()
1188 		cprm->vma_data_size += m->dump_size;  in dump_vma_snapshot()