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avcodec/cinepak: Check input packet size before frame reallocation

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Reduces time spend decoding 1917/clusterfuzz-testcase-minimized-5023221273329664

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 e47057e932)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2017-05-31 22:18:23 +02:00
parent 81b798e24d
commit 57778a0058
1 changed files with 3 additions and 3 deletions
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6
libavcodec/cinepak.c
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@ -322,9 +322,6 @@ static int cinepak_decode (CinepakContext *s)
int y0 = 0;
int encoded_buf_size;
if (s->size < 10)
return AVERROR_INVALIDDATA;
frame_flags = s->data[0];
num_strips = AV_RB16 (&s->data[8]);
encoded_buf_size = AV_RB24(&s->data[1]);
@ -439,6 +436,9 @@ static int cinepak_decode_frame(AVCodecContext *avctx,
s->data = buf;
s->size = buf_size;
if (s->size < 10)
return AVERROR_INVALIDDATA;
if ((ret = ff_reget_buffer(avctx, s->frame)) < 0)
return ret;