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Merged
LamentXU123 merged 1 commit into from
Jun 18, 2026
+19 −1
Merged

ext/standard: Reject NUL bytes in dl() #22358

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2 changes: 2 additions & 0 deletions NEWS
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Original file line number Diff line number Diff line change
Expand Up @@ -254,6 +254,8 @@ PHP NEWS
(Weilin Du)
. getenv() and putenv() now raises a ValueError when the first argument
contains null bytes. (Weilin Du)
. dl() now raises a ValueError when the $extension_filename argument
contains null bytes. (Weilin Du)
. parse_str() now raises a ValueError when the $string argument contains
null bytes. (Weilin Du)
. proc_open() now raises a ValueError when the $cwd argument contains
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2 changes: 2 additions & 0 deletions UPGRADING
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Expand Up @@ -151,6 +151,8 @@ PHP 8.6 UPGRADE NOTES
argument value is passed.
. getenv() and putenv() now raises a ValueError when the first argument
contains null bytes.
. dl() now raises a ValueError when the $extension_filename argument
contains null bytes.
. parse_str() now raises a ValueError when the $string argument contains
null bytes.
. linkinfo() now raises a ValueError when the $path argument is empty.
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2 changes: 1 addition & 1 deletion ext/standard/dl.c
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Expand Up @@ -43,7 +43,7 @@ PHPAPI PHP_FUNCTION(dl)
size_t filename_len;

ZEND_PARSE_PARAMETERS_START(1, 1)
Z_PARAM_STRING(filename, filename_len)
Z_PARAM_PATH(filename, filename_len)
ZEND_PARSE_PARAMETERS_END();

if (!PG(enable_dl)) {
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14 changes: 14 additions & 0 deletions ext/standard/tests/general_functions/dl_null_bytes.phpt
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@@ -0,0 +1,14 @@
--TEST--
dl() rejects null bytes in extension filename
--FILE--
<?php

try {
dl("foo\0bar");
} catch (ValueError $e) {
echo $e->getMessage(), "\n";
}

?>
--EXPECT--
dl(): Argument #1 ($extension_filename) must not contain any null bytes
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