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Adapted for 5.4, binary patch removed, from:
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From f3feddb5b45b5abd93abb1a95044b7e099d51c84 Mon Sep 17 00:00:00 2001
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From: Stanislav Malyshev <stas@php.net>
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Date: Mon, 18 Jul 2016 22:20:45 -0700
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Subject: [PATCH] Partial fix for bug #72613 - do not treat negative returns
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 from bz2 as size_t
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---
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 ext/bz2/bz2.c               |  80 +++++++++++++++++++++++---------------------
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 ext/bz2/tests/72613.bz2     | Bin 0 -> 351 bytes
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 ext/bz2/tests/bug72613.phpt |  23 +++++++++++++
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 3 files changed, 65 insertions(+), 38 deletions(-)
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 create mode 100644 ext/bz2/tests/72613.bz2
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 create mode 100644 ext/bz2/tests/bug72613.phpt
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diff --git a/ext/bz2/bz2.c b/ext/bz2/bz2.c
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index de3250e..7cfcaa8 100644
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--- a/ext/bz2/bz2.c
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+++ b/ext/bz2/bz2.c
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@@ -137,16 +137,20 @@ struct php_bz2_stream_data_t {
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 static size_t php_bz2iop_read(php_stream *stream, char *buf, size_t count TSRMLS_DC)
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 {
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 	struct php_bz2_stream_data_t *self = (struct php_bz2_stream_data_t *) stream->abstract;
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-	size_t ret;
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-	
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-	ret = BZ2_bzread(self->bz_file, buf, count);
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+	int bz2_ret;
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+
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+	bz2_ret = BZ2_bzread(self->bz_file, buf, count);
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-	if (ret == 0) {
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+	if (bz2_ret < 0) {
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+		stream->eof = 1;
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+		return -1;
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+	}
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+	if (bz2_ret == 0) {
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 		stream->eof = 1;
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 	}
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-	return ret;
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+	return (size_t)bz2_ret;
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 }
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 static size_t php_bz2iop_write(php_stream *stream, const char *buf, size_t count TSRMLS_DC)
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 {