Fixed findings

List of Findings

Error: GCC_ANALYZER_WARNING (CWE-476): [#def1]
util-linux-2.42.start/disk-utils/fdformat.c:129:49: warning[-Wanalyzer-possible-null-dereference]: dereference of possibly-NULL ‘xmalloc(track_size) + count’
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-476): [#def2]
util-linux-2.42.start/misc-utils/blkid.c: scope_hint: In function ‘main’
util-linux-2.42.start/misc-utils/blkid.c:889:43: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘xcalloc((long unsigned int)(argc - optind), 8)’
util-linux-2.42.start/misc-utils/blkid.c:49: included_from: Included from here.
util-linux-2.42.start/misc-utils/blkid.c:18: included_from: Included from here.
#  887|   				continue;
#  888|   
#  889|-> 			devices[numdev++] = dev;
#  890|   		}
#  891|   

Error: GCC_ANALYZER_WARNING (CWE-476): [#def3]
util-linux-2.42.start/misc-utils/hardlink.c: scope_hint: In function ‘get_sorted_xattr_name_table’
util-linux-2.42.start/misc-utils/hardlink.c:528:26: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘xcalloc((long unsigned int)n, 8)’
util-linux-2.42.start/misc-utils/hardlink.c: scope_hint: In function ‘get_sorted_xattr_name_table’
util-linux-2.42.start/include/optutils.h:8: included_from: Included from here.
util-linux-2.42.start/misc-utils/hardlink.c:58: included_from: Included from here.
util-linux-2.42.start/misc-utils/hardlink.c:251:21: note: in expansion of macro ‘is_log_enabled’
util-linux-2.42.start/misc-utils/hardlink.c:562:9: note: in expansion of macro ‘jlog’
util-linux-2.42.start/misc-utils/hardlink.c:55: included_from: Included from here.
#  526|   
#  527|   	for (i = 0; i < n; i++) {
#  528|-> 		table[i] = names;
#  529|   		names += strlen(names) + 1;
#  530|   	}

Error: GCC_ANALYZER_WARNING (CWE-476): [#def4]
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;

Error: GCC_ANALYZER_WARNING (CWE-476): [#def5]
util-linux-2.42.start/misc-utils/waitpid.c: scope_hint: In function ‘open_pidfds’
util-linux-2.42.start/misc-utils/waitpid.c:63:27: warning[-Wanalyzer-null-dereference]: dereference of NULL ‘xcalloc(n_pids, 4) + i * 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 ‘_’
#   61|   
#   62|   	for (size_t i = 0; i < n_pids; i++) {
#   63|-> 		pidfds[i] = pidfd_open(pids[i], 0);
#   64|   		if (pidfds[i] == -1) {
#   65|   			if (allow_exited && errno == ESRCH) {

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