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avcodec/pafvideo: Clear frame buffer later 

This way the clearing can be skipped in case of some errors.

Fixes: Timeout (11sec -> 344ms)
Fixes: 14670/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_PAF_VIDEO_fuzzer-5769534503387136

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-05-17 22:27:38 +02:00
parent cf3156e762
commit 89836ad5a7
1 changed files with 4 additions and 3 deletions
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7
libavcodec/pafvideo.c
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@ -293,9 +293,6 @@ static int paf_video_decode(AVCodecContext *avctx, void *data,
return ret;
if (code & 0x20) { // frame is keyframe
for (i = 0; i < 4; i++)
memset(c->frame[i], 0, c->frame_size);
memset(c->pic->data[1], 0, AVPALETTE_SIZE);
c->current_frame = 0;
c->pic->key_frame = 1;
@ -332,6 +329,10 @@ static int paf_video_decode(AVCodecContext *avctx, void *data,
c->pic->palette_has_changed = 1;
}
if (code & 0x20)
for (i = 0; i < 4; i++)
memset(c->frame[i], 0, c->frame_size);
switch (code & 0x0F) {
case 0:
/* Block-based motion compensation using 4x4 blocks with either