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Fuzz+LibGfx: When fuzzing GIFLoader, try to load all frames

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Ben Wiederhake 2021-05-30 12:37:52 +02:00 committed by Linus Groh
parent 2d011961c9
commit 774107f37c
Notes: sideshowbarker 2024-07-18 17:10:11 +09:00 
Author: https://github.com/BenWiederhake
Commit: https://github.com/SerenityOS/serenity/commit/774107f37c6
Pull-request: https://github.com/SerenityOS/serenity/pull/7584
1 changed files with 21 additions and 1 deletions
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22
Meta/Lagom/Fuzzers/FuzzGIFLoader.cpp
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@ -4,12 +4,32 @@
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <AK/Debug.h>
#include <AK/Format.h>
#include <AK/String.h>
#include <LibGfx/GIFLoader.h>
#include <stddef.h>
#include <stdint.h>
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size)
{
Gfx::load_gif_from_memory(data, size);
Gfx::GIFImageDecoderPlugin gif_decoder(data, size);
auto bitmap = gif_decoder.bitmap();
if (bitmap) {
// Looks like a valid GIF. Try to load the other frames:
dbgln_if(GIF_DEBUG, "bitmap size: {}", bitmap->size());
dbgln_if(GIF_DEBUG, "codec size: {}", gif_decoder.size());
dbgln_if(GIF_DEBUG, "is_sniff: {}", gif_decoder.sniff());
dbgln_if(GIF_DEBUG, "is_animated: {}", gif_decoder.is_animated());
dbgln_if(GIF_DEBUG, "loop_count: {}", gif_decoder.loop_count());
dbgln_if(GIF_DEBUG, "frame_count: {}", gif_decoder.frame_count());
for (size_t i = 0; i < gif_decoder.frame_count(); ++i) {
auto ifd = gif_decoder.frame(i);
dbgln_if(GIF_DEBUG, "frame #{} size: {}", i, ifd.image->size());
dbgln_if(GIF_DEBUG, "frame #{} duration: {}", i, ifd.duration);
}
dbgln_if(GIF_DEBUG, "Done.");
}
return 0;
}