Fixed findings

List of Findings

Error: GCC_ANALYZER_WARNING (CWE-476): [#def1]
util-linux-2.42.start/disk-utils/cfdisk.c: scope_hint: In function ‘ui_create_label’
util-linux-2.42.start/disk-utils/cfdisk.c:2182:30: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘xcalloc(fdisk_get_nlabels(*cf.cxt) + 1, 32) + i * 32’
util-linux-2.42.start/disk-utils/cfdisk.c:267:25: note: in expansion of macro ‘__UL_DBG’
util-linux-2.42.start/disk-utils/cfdisk.c:2170:9: note: in expansion of macro ‘DBG’
# 2180|   		    fdisk_label_get_type(lb) == FDISK_DISKLABEL_BSD)
# 2181|   			continue;
# 2182|-> 		cm[i++].name = fdisk_label_get_name(lb);
# 2183|   	}
# 2184|   

Error: GCC_ANALYZER_WARNING (CWE-401): [#def2]
util-linux-2.42.start/disk-utils/cfdisk.c:2182:32: warning[-Wanalyzer-malloc-leak]: leak of ‘xcalloc(fdisk_get_nlabels(*cf.cxt) + 1, 32) + i * 32’
util-linux-2.42.start/disk-utils/cfdisk.c:267:25: note: in expansion of macro ‘__UL_DBG’
util-linux-2.42.start/disk-utils/cfdisk.c:2170:9: note: in expansion of macro ‘DBG’
# 2180|   		    fdisk_label_get_type(lb) == FDISK_DISKLABEL_BSD)
# 2181|   			continue;
# 2182|-> 		cm[i++].name = fdisk_label_get_name(lb);
# 2183|   	}
# 2184|   

Error: GCC_ANALYZER_WARNING (CWE-476): [#def3]
util-linux-2.42.start/disk-utils/fdformat.c:129:49: warning[-Wanalyzer-possible-null-dereference]: dereference of possibly-NULL ‘xmalloc(track_size) + count’
#  127|   				}
#  128|   				for (count = 0; count < track_size; count++)
#  129|-> 					if (data[count] != FD_FILL_BYTE) {
#  130|   						if (retries_left) {
#  131|   							format_begin(ctrl);

Error: GCC_ANALYZER_WARNING (CWE-401): [#def4]
util-linux-2.42.start/login-utils/last.c:48: included_from: Included from here.
util-linux-2.42.start/include/xalloc.h: scope_hint: In function ‘xstrdup’
util-linux-2.42.start/include/xalloc.h:95:17: warning[-Wanalyzer-malloc-leak]: leak of ‘xmalloc(8) + nfiles * 8’
util-linux-2.42.start/include/optutils.h:8: included_from: Included from here.
util-linux-2.42.start/login-utils/last.c:46: included_from: Included from here.
#   93|   	ret = strdup(str);
#   94|   	if (!ret)
#   95|-> 		err(XALLOC_EXIT_CODE, "cannot duplicate string");
#   96|   	return ret;
#   97|   }

Error: GCC_ANALYZER_WARNING (CWE-401): [#def5]
util-linux-2.42.start/lsfd-cmd/lsfd.c: scope_hint: In function ‘new_filter’
util-linux-2.42.start/lsfd-cmd/lsfd.c:2373:28: warning[-Wanalyzer-malloc-leak]: leak of ‘xcalloc(17, 8) + i * 8’
# 2371|   	struct libscols_counter *ct;
# 2372|   
# 2373|-> 	f = new_filter(spec->expr, false, ctl);
# 2374|   
# 2375|   	ct = scols_filter_new_counter(f);

Error: GCC_ANALYZER_WARNING (CWE-476): [#def6]
util-linux-2.42.start/misc-utils/cal.c: scope_hint: In function ‘monthly’
util-linux-2.42.start/misc-utils/cal.c:1099:28: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘xcalloc((long unsigned int)*ctl.months_in_row, 208) + (sizetype)i * 208’
util-linux-2.42.start/misc-utils/cal.c:79: included_from: Included from here.
# 1097|   
# 1098|   	for (i = 0; i < ctl->months_in_row - 1; i++)
# 1099|-> 		ms[i].next = &ms[i + 1];
# 1100|   
# 1101|   	rows = (ctl->num_months - 1) / ctl->months_in_row;

Error: GCC_ANALYZER_WARNING (CWE-476): [#def7]
util-linux-2.42.start/misc-utils/logger.c:1050:34: warning[-Wanalyzer-possible-null-dereference]: dereference of possibly-NULL ‘xmalloc(*ctl.max_message_size + 4) + i’
# 1048|   
# 1049|   		while (c != EOF && c != '\n' && i < ctl->max_message_size) {
# 1050|-> 			buf[i++] = c;
# 1051|   			c = getchar();
# 1052|   		}

Error: GCC_ANALYZER_WARNING (CWE-476): [#def8]
util-linux-2.42.start/misc-utils/logger.c:1053:24: warning[-Wanalyzer-possible-null-dereference]: dereference of possibly-NULL ‘xmalloc(*ctl.max_message_size + 4) + i’
# 1051|   			c = getchar();
# 1052|   		}
# 1053|-> 		buf[i] = '\0';
# 1054|   
# 1055|   		if (i > 0 || !ctl->skip_empty_lines) {

Error: GCC_ANALYZER_WARNING (CWE-476): [#def9]
util-linux-2.42.start/misc-utils/waitpid.c: scope_hint: In function ‘parse_pids’
util-linux-2.42.start/misc-utils/waitpid.c:53:25: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘xcalloc(n_strings, 4)’
util-linux-2.42.start/include/strutils.h:55:64: note: in definition of macro ‘strtopid_or_err’
util-linux-2.42.start/misc-utils/waitpid.c:53:55: note: in expansion of macro ‘_’
#   51|   
#   52|   	for (size_t i = 0; i < n_strings; i++)
#   53|-> 		pids[i] = strtopid_or_err(strings[i], _("invalid PID argument"));
#   54|   
#   55|   	return pids;

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