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avcodec/pixlet: Fix runtime error: signed integer overflow: 2147483647 + 32 cannot be represented in type 'int' 

Fixes: 1829/clusterfuzz-testcase-minimized-5527165321871360

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 2017-05-27 13:03:36 +02:00
parent 1a36354698
commit 77d9889821
1 changed files with 4 additions and 0 deletions
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4
libavcodec/pixlet.c
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@ -594,6 +594,10 @@ static int pixlet_decode_frame(AVCodecContext *avctx, void *data,
width = bytestream2_get_be32(&ctx->gb);
height = bytestream2_get_be32(&ctx->gb);
if ( width > INT_MAX - (1U << (NB_LEVELS + 1))
|| height > INT_MAX - (1U << (NB_LEVELS + 1)))
return AVERROR_INVALIDDATA;
w = FFALIGN(width, 1 << (NB_LEVELS + 1));
h = FFALIGN(height, 1 << (NB_LEVELS + 1));