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wavpack: check K, fix assertion failure

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Instead of this it would be possible to change the code to support
larger K but that would make the code slower and probably still need
checks on K.
This variant is choosen as there are no known valid files that need
larger K

Found-by: Mateusz "j00ru" Jurczyk and Gynvael Coldwind
Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-03-28 00:23:23 +01:00
parent 81e85bc95c
commit c6831e2a70
1 changed files with 4 additions and 0 deletions
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4
libavcodec/wavpack.c
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@ -373,6 +373,10 @@ static int wv_get_value(WavpackFrameContext *ctx, GetBitContext *gb,
INC_MED(2);
}
if (!c->error_limit) {
if (add >= 0x2000000U) {
av_log(ctx->avctx, AV_LOG_ERROR, "k %d is too large\n", add);
goto error;
}
ret = base + get_tail(gb, add);
if (get_bits_left(gb) <= 0)
goto error;