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)’
util-linux-2.42.start/include/debug.h:106:17: note: in expansion of macro ‘__UL_INIT_DEBUG_FROM_STRING’
util-linux-2.42.start/disk-utils/cfdisk.c:271:9: note: in expansion of macro ‘__UL_INIT_DEBUG_FROM_ENV’
util-linux-2.42.start/include/debug.h:106:17: note: in expansion of macro ‘__UL_INIT_DEBUG_FROM_STRING’
util-linux-2.42.start/disk-utils/cfdisk.c:271:9: note: in expansion of macro ‘__UL_INIT_DEBUG_FROM_ENV’
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): [#def2]
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): [#def3]
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): [#def4]
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)’
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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