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avcodec/wavarc: Fix k limit 

The implementation does not support k=32

Fixes: shift exponent 32 is too large for 32-bit type 'unsigned int'
Fixes: 57976/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WAVARC_fuzzer-5911925807775744

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 2023-04-24 18:16:05 +02:00
parent 071c625ad7
commit 40cec0b465
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GPG Key ID: B18E8928B3948D64
1 changed files with 2 additions and 2 deletions
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libavcodec/wavarc.c
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@ -205,7 +205,7 @@ static int decode_1dif(AVCodecContext *avctx,
if (block_type < 4 && block_type >= 0) {
k = 1 + (avctx->sample_fmt == AV_SAMPLE_FMT_S16P);
k = get_urice(gb, k) + 1;
if (k > 32)
if (k >= 32)
return AVERROR_INVALIDDATA;
}
@ -297,7 +297,7 @@ static int decode_2slp(AVCodecContext *avctx,
if (block_type < 5 && block_type >= 0) {
k = 1 + (avctx->sample_fmt == AV_SAMPLE_FMT_S16P);
k = get_urice(gb, k) + 1;
if (k > 32)
if (k >= 32)
return AVERROR_INVALIDDATA;
}