Skip to content

Fix GH-16184: UBSan address overflowed in ext/pcre/php_pcre.c #16205

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Closed
wants to merge 1 commit into from
Closed

Fix GH-16184: UBSan address overflowed in ext/pcre/php_pcre.c #16205

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
8 changes: 5 additions & 3 deletions ext/pcre/php_pcre.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -1747,9 +1747,11 @@ PHPAPI zend_string *php_pcre_replace_impl(pcre_cache_entry *pce, zend_string *su
}
if (preg_get_backref(&walk, &backref)) {
if (backref < count) {
match_len = offsets[(backref<<1)+1] - offsets[backref<<1];
memcpy(walkbuf, subject + offsets[backref<<1], match_len);
walkbuf += match_len;
if (offsets[backref<<1] < SIZE_MAX) {
match_len = offsets[(backref<<1)+1] - offsets[backref<<1];
memcpy(walkbuf, subject + offsets[backref<<1], match_len);
walkbuf += match_len;
}
}
continue;
}
Expand Down
13 changes: 13 additions & 0 deletions ext/pcre/tests/gh16184.phpt
View file
Open in desktop
Original file line number Diff line number Diff line change
@@ -0,0 +1,13 @@
--TEST--
GH-16184 (UBSan address overflowed in ext/pcre/php_pcre.c)
--CREDITS--
YuanchengJiang
--FILE--
<?php

$string = 'This is a string. It contains numbers (0*9) as well as parentheses and some other things!';
echo preg_replace(array('/\b\w{1}s/', '/(\d{1})*(\d{1})/', '/[\(!\)]/'), array('test', '$1 to $2', '*'), $string), "\n";

?>
--EXPECT--
This test a string. It contains numbers * to 0* to 9* test well test parentheses and some other things*
Loading