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WebP/Lossy: Check that file contains enough data for first partition

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Nico Weber 2023-05-29 15:10:02 -04:00 • committed by Andreas Kling
parent cabfb7867c
commit 74b50c046b
1 changed files with 3 additions and 0 deletions
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Userland/Libraries/LibGfx/ImageFormats/WebPLoaderLossy.cpp
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@ -98,6 +98,9 @@ ErrorOr<VP8Header> decode_webp_chunk_VP8_header(ReadonlyBytes vp8_data)
dbgln_if(WEBP_DEBUG, "version {}, show_frame {}, size_of_first_partition {}, width {}, horizontal_scale {}, height {}, vertical_scale {}",
version, show_frame, size_of_first_partition, width, horizontal_scale, height, vertical_scale);
if (vp8_data.size() < 10 + size_of_first_partition)
return Error::from_string_literal("WebPImageDecoderPlugin: 'VP8 ' chunk too small for full first partition");
return VP8Header { version, show_frame, size_of_first_partition, width, horizontal_scale, height, vertical_scale, vp8_data.slice(10, size_of_first_partition), vp8_data.slice(10 + size_of_first_partition) };
}