From 06d309fd7a917575d65c7a6f4f57b0e6bb0f9711 Mon Sep 17 00:00:00 2001
From: Stanislav Malyshev <stas@php.net>
Date: Sun, 22 Apr 2018 21:26:06 -0700
Subject: [PATCH] Fix bug #76249 - fail on invalid sequences

---
 ext/iconv/iconv.c             |  3 +++
 ext/iconv/tests/bug76249.phpt | 16 ++++++++++++++++
 2 files changed, 19 insertions(+)
 create mode 100644 ext/iconv/tests/bug76249.phpt

diff --git a/ext/iconv/iconv.c b/ext/iconv/iconv.c
index 69dd8c1cf7..fca5331541 100644
--- a/ext/iconv/iconv.c
+++ b/ext/iconv/iconv.c
@@ -2672,6 +2672,9 @@ static int php_iconv_stream_filter_append_bucket(
 								tcnt = 0;
 								break;
 							}
+						} else {
+						    php_error_docref(NULL, E_WARNING, "iconv stream filter (\"%s\"=>\"%s\"): invalid multibyte sequence", self->from_charset, self->to_charset);
+						    goto out_failure;
 						}
 						break;
 
diff --git a/ext/iconv/tests/bug76249.phpt b/ext/iconv/tests/bug76249.phpt
new file mode 100644
index 0000000000..5a9d8f171e
--- /dev/null
+++ b/ext/iconv/tests/bug76249.phpt
@@ -0,0 +1,16 @@
+--TEST--
+Bug #76249 (stream filter convert.iconv leads to infinite loop on invalid sequence)
+--SKIPIF--
+<?php extension_loaded('iconv') or die('skip iconv extension is not available'); ?>
+--FILE--
+<?php
+$fh = fopen('php://memory', 'rw');
+fwrite($fh, "abc");
+rewind($fh);
+stream_filter_append($fh, 'convert.iconv.ucs-2/utf8//IGNORE', STREAM_FILTER_READ, []);
+echo stream_get_contents($fh);
+?>
+DONE
+--EXPECTF--
+Warning: stream_get_contents(): iconv stream filter ("ucs-2"=>"utf8//IGNORE"): invalid multibyte sequence in %sbug76249.php on line %d
+慢DONE
-- 
2.40.0