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LibGfx/PNG: Reject files that doesn't start with a IHDr chunk

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This commit is contained in:
Lucas CHOLLET
2023-07-17 00:22:11 -04:00
committed by Sam Atkins
parent 8d907b6535
commit a173275afa
1 changed files with 4 additions and 0 deletions
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4
Userland/Libraries/LibGfx/ImageFormats/PNGLoader.cpp
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@@ -1212,6 +1212,10 @@ static ErrorOr<void> process_chunk(Streamer& streamer, PNGLoadingContext& contex
if (chunk_type == "IHDR"sv)
return process_IHDR(chunk_data, context);
if (context.state < PNGLoadingContext::IHDRDecoded)
return Error::from_string_literal("IHDR is not the first chunk of the file");
if (chunk_type == "IDAT"sv)
return process_IDAT(chunk_data, context);
if (chunk_type == "PLTE"sv)