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avcodec/snow: Fix off by 1 error in run_buffer

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Fixes: out of array access
Fixes: 70741/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_SNOW_fuzzer-5703668010647552

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 06f5ed40f8)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2024-07-31 21:43:39 +02:00
parent 09f16093e6
commit 205732d468
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1 changed files with 1 additions and 1 deletions
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libavcodec/snow.c
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@ -491,7 +491,7 @@ av_cold int ff_snow_common_init(AVCodecContext *avctx){
FF_ALLOCZ_ARRAY_OR_GOTO(avctx, s->spatial_dwt_buffer, width, height * sizeof(DWTELEM), fail); //FIXME this does not belong here
FF_ALLOCZ_ARRAY_OR_GOTO(avctx, s->temp_dwt_buffer, width, sizeof(DWTELEM), fail);
FF_ALLOCZ_ARRAY_OR_GOTO(avctx, s->temp_idwt_buffer, width, sizeof(IDWTELEM), fail);
FF_ALLOC_ARRAY_OR_GOTO(avctx, s->run_buffer, ((width + 1) >> 1), ((height + 1) >> 1) * sizeof(*s->run_buffer), fail);
FF_ALLOC_ARRAY_OR_GOTO(avctx, s->run_buffer, ((width + 1) >> 1) * ((height + 1) >> 1) + 1, sizeof(*s->run_buffer), fail);
for(i=0; i<MAX_REF_FRAMES; i++) {
for(j=0; j<MAX_REF_FRAMES; j++)