fergalmoran/ladybird
1
0
Fork 0
mirror of https://github.com/fergalmoran/ladybird.git synced 2026-03-26 07:17:25 +00:00
Code Issues Packages Projects Releases Wiki Activity

LibGfx/PNGLoader: Don't allow multiple consecutive IHDR chunks

Browse Source
This commit is contained in:
Tim Ledbetter
2023-10-07 10:02:32 +01:00
committed by Andreas Kling
parent 3250a424f0
commit bc6ae54b59
1 changed files with 5 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
Userland/Libraries/LibGfx/ImageFormats/PNGLoader.cpp
View File

@@ -1237,8 +1237,12 @@ static ErrorOr<void> process_chunk(Streamer& streamer, PNGLoadingContext& contex
}
dbgln_if(PNG_DEBUG, "Chunk type: '{}', size: {}, crc: {:x}", chunk_type, chunk_size, chunk_crc);
if (chunk_type == "IHDR"sv)
if (chunk_type == "IHDR"sv) {
if (context.state >= PNGLoadingContext::IHDRDecoded)
return Error::from_string_literal("Multiple IHDR chunks");
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");