MDEV-13416 mariabackup --backup fails to copy log if LSN is above 4294967295

xtrabackup_copy_log(): Use a 64-bit bitmask (lsn_t), not 32-bit (int).

extra/mariabackup/xtrabackup.cc

@@ -2238,7 +2238,7 @@ xtrabackup_copy_log(copy_logfile copy, lsn_t start_lsn, lsn_t end_lsn)
 
 	end_lsn = copy == COPY_LAST
 		? ut_uint64_align_up(scanned_lsn, OS_FILE_LOG_BLOCK_SIZE)
-		: scanned_lsn & ~(OS_FILE_LOG_BLOCK_SIZE - 1);
+		: scanned_lsn & ~lsn_t(OS_FILE_LOG_BLOCK_SIZE - 1);
 
 	if (ulint write_size = ulint(end_lsn - start_lsn)) {
 		if (srv_encrypt_log) {

mysql-test/suite/mariabackup/huge_lsn.result

+#
+# MDEV-13416 mariabackup fails with EFAULT "Bad Address"
+#
+FOUND 1 /InnoDB: 5\.7\.\d+ started; log sequence number 17592186044428/ in mysqld.1.err
+CREATE TABLE t(i INT) ENGINE INNODB;
+INSERT INTO t VALUES(1);
+# xtrabackup backup
+INSERT INTO t VALUES(2);
+# xtrabackup prepare
+# shutdown server
+# remove datadir
+# xtrabackup move back
+# restart server
+SELECT * FROM t;
+i
+1
+DROP TABLE t;

mysql-test/suite/mariabackup/huge_lsn.test

+--source include/not_embedded.inc
+
+--echo #
+--echo # MDEV-13416 mariabackup fails with EFAULT "Bad Address"
+--echo #
+
+let INNODB_PAGE_SIZE=`select @@innodb_page_size`;
+let MYSQLD_DATADIR=`select @@datadir`;
+
+--source include/shutdown_mysqld.inc
+
+perl;
+my $file= "$ENV{MYSQLD_DATADIR}/ibdata1";
+open(FILE, "+<", $file) or die "Unable to open $file\n";
+binmode FILE;
+my $ps= $ENV{INNODB_PAGE_SIZE};
+my $page;
+die "Unable to read $file" unless sysread(FILE, $page, $ps) == $ps;
+substr($page,26,8) = pack("NN", 4096, 0);
+substr($page,0,4)=pack("N",0xdeadbeef);
+substr($page,$ps-8,4)=pack("N",0xdeadbeef);
+sysseek(FILE, 0, 0) || die "Unable to rewind $file\n";
+syswrite(FILE, $page, $ps)==$ps || die "Unable to write $file\n";
+close(FILE) || die "Unable to close $file\n";
+EOF
+
+--remove_files_wildcard $MYSQLD_DATADIR ib_logfile*
+
+--source include/start_mysqld.inc
+let SEARCH_FILE= $MYSQLTEST_VARDIR/log/mysqld.1.err;
+--let SEARCH_PATTERN= InnoDB: 5\.7\.\d+ started; log sequence number 17592186044428
+--source include/search_pattern_in_file.inc
+
+CREATE TABLE t(i INT) ENGINE INNODB;
+INSERT INTO t VALUES(1);
+
+echo # xtrabackup backup;
+let $targetdir=$MYSQLTEST_VARDIR/tmp/backup;
+--disable_result_log
+exec $XTRABACKUP --defaults-file=$MYSQLTEST_VARDIR/my.cnf --backup --target-dir=$targetdir;
+--enable_result_log
+INSERT INTO t VALUES(2);
+echo # xtrabackup prepare;
+--disable_result_log
+exec $XTRABACKUP  --prepare --target-dir=$targetdir;
+--source include/restart_and_restore.inc
+--enable_result_log
+SELECT * FROM t;
+DROP TABLE t;
+rmdir $targetdir;