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avcodec/diracdec: Change frame_number to 64bit as its a 32bit from the bitstream and we also have a -1 special case 

Fixes: signed integer overflow: 2147483647 + 1 cannot be represented in type 'int'
Fixes: 9291/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_DIRAC_fuzzer-6324345860259840

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 2018-07-22 20:45:39 +02:00
parent 69cac9e130
commit 462d1be6de
1 changed files with 2 additions and 2 deletions
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4
libavcodec/diracdec.c
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@ -141,7 +141,7 @@ typedef struct DiracContext {
GetBitContext gb;
AVDiracSeqHeader seq;
int seen_sequence_header;
int frame_number; /* number of the next frame to display */
int64_t frame_number; /* number of the next frame to display */
Plane plane[3];
int chroma_x_shift;
int chroma_y_shift;
@ -2310,7 +2310,7 @@ static int dirac_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
}
if (*got_frame)
s->frame_number = picture->display_picture_number + 1;
s->frame_number = picture->display_picture_number + 1LL;
return buf_idx;
}