EOF inside bytes field error occurs when exceeding specific length of bytes

[slotherhouse]

What version of protobuf and what language are you using? Version v3.21.9 of the the google/protobuf composer package. Generated with libprotoc 3.17.0

Language: PHP

What operating system (Linux, Windows, ...) and version? Debian linux ( 4.19.0-22-amd64 #1 SMP Debian 4.19.260-1 (2022-09-29) x86_64 GNU/Linux )

What runtime / compiler are you using (e.g., python version or gcc version) Error has been confirmed with php7.3 / php7.4 / php8.1

What did you do? The error can be reproduced with the following .proto and php files, in a repository with protobuf installed through composer.

data.proto

syntax = "proto3";

message Message {
    SubMessage result = 1;
}

message SubMessage {
    oneof dataNullable {
        bytes data = 1;
    }
}

main.php

<?php

require_once './vendor/autoload.php';
require_once './GPBMetadata/Data.php';
require_once './Message.php';
require_once './SubMessage.php';

$subMsg = new \SubMessage();
$subMsg->setData(str_repeat('0', 33554423));
$msg = new \Message();
$msg->setResult($subMsg);

$recv = new \Message();
$recv->mergeFromString($msg->serializeToString());

Php protobuf classes generated with: protoc --php_out=./ ./data.proto

What did you expect to see Nothing, the script should execute without error.

What did you see instead? (Using php7.3) PHP Fatal error: Uncaught Google\Protobuf\Internal\GPBDecodeException: Error occurred during parsing: Unexpected EOF inside bytes field. in /home/x/php/vendor/google/protobuf/src/Google/Protobuf/Internal/Message.php:442 Stack trace: #0 /home/x/php/vendor/google/protobuf/src/Google/Protobuf/Internal/Message.php(515): Google\Protobuf\Internal\Message::parseFieldFromStreamNoTag(Object(Google\Protobuf\Internal\CodedInputStream), Object(Google\Protobuf\Internal\FieldDescriptor), NULL) #1 /home/x/php/vendor/google/protobuf/src/Google/Protobuf/Internal/Message.php(811): Google\Protobuf\Internal\Message->parseFieldFromStream(10, Object(Google\Protobuf\Internal\CodedInputStream), Object(Google\Protobuf\Internal\FieldDescriptor)) #2 /home/x/php/vendor/google/protobuf/src/Google/Protobuf/Internal/GPBWire.php(289): Google\Protobuf\Internal\Message->parseFromStream(Object(Google\Protobuf\Internal\CodedInputStream)) #3 /home/x/php/vendor/google/protobuf/src/Google/Protobuf/Internal/Message.php(435): Google\Protobuf\Internal\ in /home/x/php/vendor/google/protobuf/src/Google/Protobuf/Internal/Message.php on line 442

Anything else we should know about your project / environment The error occurs on a str_repeat of exactly 33554423 or more times 0, when adjusting to 33554422 no error occurs. The total strlen of the outer $msg when serialized to string is 33554433 ( Binary value of 10000000000000000000000001 )

[WarriorXK]

Is there an update on this item? I seem to have the same issue.

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