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Fixed negation of PHP_INT_MIN in ext/pdo_sqlite/pdo_sqlite.c #20928

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Fixed negation of PHP_INT_MIN in ext/pdo_sqlite/pdo_sqlite.c #20928

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4 changes: 2 additions & 2 deletions ext/pdo_sqlite/pdo_sqlite.c
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Original file line number Diff line number Diff line change
Expand Up @@ -205,7 +205,7 @@ static int php_pdosqlite3_stream_seek(php_stream *stream, zend_off_t offset, int
switch(whence) {
case SEEK_CUR:
if (offset < 0) {
if (sqlite3_stream->position < (size_t)(-offset)) {
if (sqlite3_stream->position < -(size_t)(offset)) {
sqlite3_stream->position = 0;
*newoffs = -1;
return -1;
Expand Down Expand Up @@ -243,7 +243,7 @@ static int php_pdosqlite3_stream_seek(php_stream *stream, zend_off_t offset, int
sqlite3_stream->position = sqlite3_stream->size;
*newoffs = -1;
return -1;
} else if (sqlite3_stream->size < (size_t)(-offset)) {
} else if (sqlite3_stream->size < -(size_t)(offset)) {
sqlite3_stream->position = 0;
*newoffs = -1;
return -1;
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18 changes: 18 additions & 0 deletions ext/pdo_sqlite/tests/bug20927.phpt
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Original file line number Diff line number Diff line change
@@ -0,0 +1,18 @@
--TEST--
PDO_SQLITE: fseek() with PHP_INT_MIN on sqlite blob stream (UBSan regression test)
--EXTENSIONS--
pdo
pdo_sqlite
--FILE--
<?php
$db = new Pdo\Sqlite('sqlite::memory:');
$db->exec('CREATE TABLE test (id STRING, data BLOB)');
$insert_stmt = $db->prepare("INSERT INTO test (id, data) VALUES (?, ?)");
$insert_stmt->bindValue(1, 'a', PDO::PARAM_STR);
$insert_stmt->bindValue(2, 'TEST TEST', PDO::PARAM_LOB);
$insert_stmt->execute();
$stream = $db->openBlob('test', 'data', 1);
var_dump(fseek($stream, PHP_INT_MIN, SEEK_END));
?>
--EXPECT--
int(-1)
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