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avcodec/utvideodec: Clear plane_start array

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in pack mode the array is passed into decode_plane() without being initialized or used

Fixes: use of uninitialized memory
Fixes: 438780119/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_UTVIDEO_DEC_fuzzer-5464037027807232

Found-by: continuous fuzzing process https://github.com/google/oss-fuzz/tree/master/projects/ffmpeg
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2025-08-15 17:55:05 +02:00
parent c9e93df4ee
commit 2a22972db3
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1 changed files with 1 additions and 1 deletions
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libavcodec/utvideodec.c
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@ -585,7 +585,7 @@ static int decode_frame(AVCodecContext *avctx, AVFrame *frame,
int buf_size = avpkt->size;
UtvideoContext *c = avctx->priv_data;
int i, j;
const uint8_t *plane_start[5];
const uint8_t *plane_start[5] = {NULL};
int plane_size, max_slice_size = 0, slice_start, slice_end, slice_size;
int ret;
GetByteContext gb;