diff options
| author | Campbell Barton <campbell@blender.org> | 2022-07-15 07:52:32 +0300 |
|---|---|---|
| committer | Campbell Barton <campbell@blender.org> | 2022-07-15 07:53:38 +0300 |
| commit | d14d5705807c8216f3cfb1de3af6f448a1401599 (patch) | |
| tree | c00d8fcb4cc34f0b330dae59433ebb9b3e2ddd6f | |
| parent | c8e8f107bf82fb56f49101e1098f4c697b16cfeb (diff) | |
blend_render_info: add check for negative BHead length (corrupt file)
Without this check, corrupt files would raise a Python exception,
now early exit with a useful error.
| -rwxr-xr-x | release/scripts/modules/blend_render_info.py | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/release/scripts/modules/blend_render_info.py b/release/scripts/modules/blend_render_info.py index 37c5f6dd3ba..6b45a6f7e72 100755 --- a/release/scripts/modules/blend_render_info.py +++ b/release/scripts/modules/blend_render_info.py @@ -93,6 +93,11 @@ def _read_blend_rend_chunk_from_file(blendfile, filepath): break sizeof_data_left = struct.unpack('>i' if is_big_endian else '<i', blendfile.read(4))[0] + if sizeof_data_left < 0: + # Very unlikely, but prevent other errors. + sys.stderr.write("Negative block size found (corrupt file): %s\n" % filepath) + break + # 4 from the `head_id`, another 4 for the size of the BHEAD. sizeof_bhead_left = sizeof_bhead - 8 |