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avcodec/interplayacm: Check input for fill_block()

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Fixes: Timeout
Fixes: 476763877/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_INTERPLAY_ACM_fuzzer-4515681843609600

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 2ab23ec729)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
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Michael Niedermayer 2026-02-10 20:47:25 +01:00
parent 08687a77d4
commit 0b027fa34b
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libavcodec/interplayacm.c
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@ -437,6 +437,9 @@ static int fill_block(InterplayACMContext *s)
unsigned i, ind;
int ret;
if (get_bits_left(gb) < s->cols * 5)
return AVERROR_INVALIDDATA;
for (i = 0; i < s->cols; i++) {
ind = get_bits(gb, 5);
ret = filler_list[ind](s, ind, i);