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avcodec/wmalosslessdec: Check block_align maximum

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Fixes: Assertion failure
Fixes: 22737/clusterfuzz-testcase-minimized-ffmpeg_AV_CODEC_ID_WMALOSSLESS_fuzzer-5958388889681920

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 314d10f7a60f1786c85da30a569be61e2b906fef)
Signed-off-by: Michael Niedermayer <michael@niedermayer.cc>
This commit is contained in:
Michael Niedermayer 2020-06-09 22:11:23 +02:00
parent 035d30ba17
commit 9641fcb355
1 changed files with 1 additions and 1 deletions
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2
libavcodec/wmalosslessdec.c
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@ -184,7 +184,7 @@ static av_cold int decode_init(AVCodecContext *avctx)
unsigned int channel_mask;
int i, log2_max_num_subframes;
if (avctx->block_align <= 0) {
if (avctx->block_align <= 0 || avctx->block_align > (1<<21)) {
av_log(avctx, AV_LOG_ERROR, "block_align is not set or invalid\n");
return AVERROR(EINVAL);
}