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avcodec/ffv1: Clear state on alloc

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Fixes: use of uninitialized memory
Fixes: 428969823/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_FFV1_DEC_fuzzer-5909681623334912

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 2025-08-06 13:36:06 +02:00 • committed by michaelni
parent 032dfe8584
commit 70fc46d185
1 changed files with 1 additions and 1 deletions
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libavcodec/ffv1.c
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@ -79,7 +79,7 @@ av_cold int ff_ffv1_init_slice_state(const FFV1Context *f,
if (f->ac != AC_GOLOMB_RICE) {
if (!p->state)
p->state = av_malloc_array(p->context_count, CONTEXT_SIZE *
p->state = av_calloc(p->context_count, CONTEXT_SIZE *
sizeof(uint8_t));
if (!p->state)
return AVERROR(ENOMEM);