diff --git a/Tests/test_file_spider.py b/Tests/test_file_spider.py index 51e54798dfb..99386d42d6b 100644 --- a/Tests/test_file_spider.py +++ b/Tests/test_file_spider.py @@ -1,5 +1,6 @@ from __future__ import annotations +import struct import tempfile import warnings from io import BytesIO @@ -177,3 +178,22 @@ def test_odd_size() -> None: data.seek(0) with Image.open(data) as im2: assert_image_equal(im, im2) + + +def test_seek_decompression_bomb() -> None: + with open(TEST_FILE, "rb") as fp: + data = fp.read() + # istack + first_frame = data[: 23 * 4] + struct.pack(" None: self.fp = self._fp self.fp.seek(self.stkoffset) self._open() + Image._decompression_bomb_check(self.size) # returns a byte image after rescaling to 0..255 def convert2byte(self, depth: int = 255) -> Image.Image: