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_get_parttype’
util-linux-2.42.start/disk-utils/cfdisk.c:2023:32: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘xcalloc(fdisk_label_get_nparttypes(fdisk_get_label(*cf.cxt, 0)) + 1, 32) + i * 32’
# 2021|   		char *name;
# 2022|   
# 2023|-> 		cm[i].userdata = (void *) x;
# 2024|   		if (codetypes)
# 2025|   			xasprintf(&name, "%2x %s",

Error: GCC_ANALYZER_WARNING (CWE-401): [#def2]
util-linux-2.42.start/disk-utils/cfdisk.c:2025:25: warning[-Wanalyzer-malloc-leak]: leak of ‘xcalloc(fdisk_label_get_nparttypes(fdisk_get_label(*cf.cxt, 0)) + 1, 32) + i * 32’
# 2023|   		cm[i].userdata = (void *) x;
# 2024|   		if (codetypes)
# 2025|-> 			xasprintf(&name, "%2x %s",
# 2026|   				fdisk_parttype_get_code(x),
# 2027|   				_(fdisk_parttype_get_name(x)));

Error: GCC_ANALYZER_WARNING (CWE-401): [#def3]
util-linux-2.42.start/disk-utils/cfdisk.c:2029:32: warning[-Wanalyzer-malloc-leak]: leak of ‘xcalloc(fdisk_label_get_nparttypes(fdisk_get_label(*cf.cxt, 0)) + 1, 32) + i * 32’
# 2027|   				_(fdisk_parttype_get_name(x)));
# 2028|   		else {
# 2029|-> 			name = (char *) _(fdisk_parttype_get_name(x));
# 2030|   			cm[i].desc = fdisk_parttype_get_string(x);
# 2031|   		}

Error: GCC_ANALYZER_WARNING (CWE-401): [#def4]
util-linux-2.42.start/disk-utils/cfdisk.c:2030:38: warning[-Wanalyzer-malloc-leak]: leak of ‘xcalloc(fdisk_label_get_nparttypes(fdisk_get_label(*cf.cxt, 0)) + 1, 32) + i * 32’
# 2028|   		else {
# 2029|   			name = (char *) _(fdisk_parttype_get_name(x));
# 2030|-> 			cm[i].desc = fdisk_parttype_get_string(x);
# 2031|   		}
# 2032|   		cm[i].name = name;

Error: GCC_ANALYZER_WARNING (CWE-476): [#def5]
util-linux-2.42.start/disk-utils/fdformat.c:129:49: warning[-Wanalyzer-possible-null-dereference]: dereference of possibly-NULL ‘xmalloc(track_size)’
util-linux-2.42.start/disk-utils/fdformat.c:20: included_from: Included from here.
#  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): [#def6]
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): [#def7]
util-linux-2.42.start/include/xalloc.h:125:17: warning[-Wanalyzer-malloc-leak]: leak of ‘xcalloc(fdisk_label_get_nparttypes(fdisk_get_label(*cf.cxt, 0)) + 1, 32) + i * 32’
#  123|   	va_end(args);
#  124|   	if (ret < 0)
#  125|-> 		err(XALLOC_EXIT_CODE, "cannot allocate string");
#  126|   	return ret;
#  127|   }

Error: GCC_ANALYZER_WARNING (CWE-401): [#def8]
util-linux-2.42.start/login-utils/lslogins.c: scope_hint: In function ‘build_sgroups_string’
util-linux-2.42.start/login-utils/lslogins.c:415:45: warning[-Wanalyzer-malloc-leak]: leak of ‘p’
#  413|   			x = snprintf(p, len, "%u,", sgroups[n]);
#  414|   		else {
#  415|-> 			struct group *grp = getgrgid(sgroups[n]);
#  416|   			if (!grp) {
#  417|   				free(res);

Error: GCC_ANALYZER_WARNING (CWE-401): [#def9]
util-linux-2.42.start/lsfd-cmd/lsfd.c:2434:28: warning[-Wanalyzer-malloc-leak]: leak of ‘xcalloc(ct + 1, 8) + i * 8’
util-linux-2.42.start/lsfd-cmd/lsfd.c:50: included_from: Included from here.
util-linux-2.42.start/lsfd-cmd/lsfd.c:2454:9: note: in expansion of macro ‘list_for_each’
# 2432|   	struct libscols_counter *ct;
# 2433|   
# 2434|-> 	f = new_filter(spec->expr, false, ctl);
# 2435|   
# 2436|   	ct = scols_filter_new_counter(f);

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