Re: [FFmpeg-devel] [PATCH 2/8] tools/target_dec_fuzzer: adjust pixel threshold for MSRLE, as it allows coding gigantic images on tiny input

[Michael Niedermayer]

On Wed, Aug 14, 2019 at 07:02:29PM +0200, Paul B Mahol wrote:
> lgtm

will apply

thx

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Re: [FFmpeg-devel] [PATCH 2/8] tools/target_dec_fuzzer: adjust pixel threshold for MSRLE, as it allows coding gigantic images on tiny input

[Paul B Mahol]

lgtm

On Mon, Aug 12, 2019 at 9:19 PM Michael Niedermayer 
wrote:

> Fixes: Timeout (12sec ->2sec)
> Fixes:
> 16125/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MSRLE_fuzzer-5650846364205056
>
> Found-by: continuous fuzzing process
> https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
> Signed-off-by
> :
> Michael Niedermayer 
> ---
>  tools/target_dec_fuzzer.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
> index e6eed88781..d83039417c 100644
> --- a/tools/target_dec_fuzzer.c
> +++ b/tools/target_dec_fuzzer.c
> @@ -170,6 +170,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t
> size) {
>  maxpixels = maxpixels_per_frame * maxiteration;
>  switch (c->id) {
>  // Allows a small input to generate gigantic output
> +case AV_CODEC_ID_MSRLE: maxpixels /= 16;  break;
>  case AV_CODEC_ID_QTRLE: maxpixels /= 16;  break;
>  case AV_CODEC_ID_GIF:   maxpixels /= 16;  break;
>  // Performs slow frame rescaling in C
> --
> 2.22.0
>
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[FFmpeg-devel] [PATCH 2/8] tools/target_dec_fuzzer: adjust pixel threshold for MSRLE, as it allows coding gigantic images on tiny input

[Michael Niedermayer]

Fixes: Timeout (12sec ->2sec)
Fixes: 
16125/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_MSRLE_fuzzer-5650846364205056

Found-by: continuous fuzzing process 
https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer 
---
 tools/target_dec_fuzzer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/tools/target_dec_fuzzer.c b/tools/target_dec_fuzzer.c
index e6eed88781..d83039417c 100644
--- a/tools/target_dec_fuzzer.c
+++ b/tools/target_dec_fuzzer.c
@@ -170,6 +170,7 @@ int LLVMFuzzerTestOneInput(const uint8_t *data, size_t 
size) {
 maxpixels = maxpixels_per_frame * maxiteration;
 switch (c->id) {
 // Allows a small input to generate gigantic output
+case AV_CODEC_ID_MSRLE: maxpixels /= 16;  break;
 case AV_CODEC_ID_QTRLE: maxpixels /= 16;  break;
 case AV_CODEC_ID_GIF:   maxpixels /= 16;  break;
 // Performs slow frame rescaling in C
-- 
2.22.0

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