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Code Issues Releases Activity

avcodec/svq3: Use ff_set_dimension()

Browse Source 
Fixes: OOM
Fixes: 15410/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SVQ3_fuzzer-5659464805384192

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
(cherry picked from commit 7b114d7687)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2019-06-25 23:42:43 +02:00
parent a58dfb447e
commit 7b4cd6ac8e
1 changed files with 20 additions and 16 deletions
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36
libavcodec/svq3.c
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@ -953,6 +953,7 @@ static av_cold int svq3_decode_init(AVCodecContext *avctx)
GetBitContext gb;
int frame_size_code;
int unk0, unk1, unk2, unk3, unk4;
int width,height;
size = AV_RB32(&extradata[4]);
if (size > extradata_end - extradata - 8) {
@ -965,38 +966,41 @@ static av_cold int svq3_decode_init(AVCodecContext *avctx)
frame_size_code = get_bits(&gb, 3);
switch (frame_size_code) {
case 0:
avctx->width = 160;
avctx->height = 120;
width = 160;
height = 120;
break;
case 1:
avctx->width = 128;
avctx->height = 96;
width = 128;
height = 96;
break;
case 2:
avctx->width = 176;
avctx->height = 144;
width = 176;
height = 144;
break;
case 3:
avctx->width = 352;
avctx->height = 288;
width = 352;
height = 288;
break;
case 4:
avctx->width = 704;
avctx->height = 576;
width = 704;
height = 576;
break;
case 5:
avctx->width = 240;
avctx->height = 180;
width = 240;
height = 180;
break;
case 6:
avctx->width = 320;
avctx->height = 240;
width = 320;
height = 240;
break;
case 7:
avctx->width = get_bits(&gb, 12);
avctx->height = get_bits(&gb, 12);
width = get_bits(&gb, 12);
height = get_bits(&gb, 12);
break;
}
ret = ff_set_dimensions(avctx, width, height);
if (ret < 0)
goto fail;
s->halfpel_flag = get_bits1(&gb);
s->thirdpel_flag = get_bits1(&gb);